treatments-xml/data/FA/57/DE/FA57DE61E37925447E8608F898D5F840.xml

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<mods:title id="049342A4C274C117D3CA650447E6B393">Unearthing the diversity of Japanese Magelona (Annelida: Magelonidae); three species new to science, and a redescription of Magelona japonica</mods:title>
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<mods:namePart id="46F6228884B6D5017BA1C6B058B84290">Taylor, Abbie</mods:namePart>
<mods:affiliation id="1285F958C2D2DF7CDD00259355567224">Department of Natural Sciences, Amgueddfa Cymru - Museum Wales, Cathays Park, Cardiff CF 10 3 NP, Wales, U. K. &amp; School of Biosciences, Cardiff University, Cardiff CF 10 3 AX, Wales, U. K.</mods:affiliation>
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<mods:namePart id="2E24531E159809B8CB9BFFBED936CA28">Mortimer, Kate</mods:namePart>
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<mods:affiliation id="1451764526814394DCAB1058FD5CBB1E">Department of Natural Sciences, Amgueddfa Cymru - Museum Wales, Cathays Park, Cardiff CF 10 3 NP, Wales, U. K. &amp; Katie. Mortimer @ museumwales. ac. uk; https: // orcid. org / 0000 - 0002 - 3430 - 1659</mods:affiliation>
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<mods:namePart id="774A999851682915949DE4F5AD3FC6F2">Jimi, Naoto</mods:namePart>
<mods:affiliation id="D6D0E3C791A6AEBCC3C1C31FB79569F4">Sugashima Marine Biological Laboratory, Graduate School of Science, Nagoya University, Toba, Japan &amp; Centre for Marine &amp; Coastal Studies, Universiti Sains Malaysia 11800 USM, Penang, Malaysia</mods:affiliation>
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<treatment id="FA57DE61E37925447E8608F898D5F840" ID-DOI="http://doi.org/10.5281/zenodo.7244455" ID-GBIF-Taxon="203130445" ID-Zenodo-Dep="7244455" LSID="urn:lsid:plazi:treatment:FA57DE61E37925447E8608F898D5F840" httpUri="http://treatment.plazi.org/id/FA57DE61E37925447E8608F898D5F840" lastPageId="11" lastPageNumber="462" pageId="9" pageNumber="460">
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<paragraph id="72416F77E37925467E8608F89F7CFF64" blockId="9.[151,977,151,322]" box="[151,552,151,178]" pageId="9" pageNumber="460">
<heading id="2909D81BE37925467E8608F89F7CFF64" bold="true" box="[151,552,151,178]" fontSize="11" level="1" pageId="9" pageNumber="460" reason="1">
<taxonomicName id="B5FE14F4E37925467E8608F89F7CFF64" ID-CoL="3XGS9" authority="Okuda, 1937" authorityName="Okuda" authorityYear="1937" box="[151,552,151,178]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="9" pageNumber="460" phylum="Annelida" rank="species" species="japonica">
<emphasis id="408AB365E37925467E8608F89F7CFF64" bold="true" box="[151,552,151,178]" pageId="9" pageNumber="460">
<emphasis id="408AB365E37925467E8608F89CD5FF64" bold="true" box="[151,385,151,178]" italics="true" pageId="9" pageNumber="460">Magelona japonica</emphasis>
Okuda, 1937
</emphasis>
</taxonomicName>
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</paragraph>
<paragraph id="72416F77E37925467E8608D39CAEFF00" blockId="9.[151,977,151,322]" box="[151,506,187,214]" pageId="9" pageNumber="460">[Japanese name: Morote-gokai]</paragraph>
</subSubSection>
<subSubSection id="3AE43CFCE37925467E8608B09DACFF2C" box="[151,248,223,249]" pageId="9" pageNumber="460" type="description">
<paragraph id="72416F77E37925467E8608B09DACFF2C" blockId="9.[151,977,151,322]" box="[151,248,223,249]" pageId="9" pageNumber="460">
<figureCitation id="EAC573F2E37925467E8608B09DACFF2C" box="[151,248,223,249]" captionStart-0="FIGURE 6" captionStart-1="FIGURE 7" captionStart-2="FIGURE 8" captionStart-3="FIGURE 9" captionStartId-0="12.[151,250,1874,1898]" captionStartId-1="13.[151,250,1808,1832]" captionStartId-2="14.[151,250,1874,1898]" captionStartId-3="15.[151,250,1032,1056]" captionTargetBox-0="[222,1382,198,1837]" captionTargetBox-1="[227,1361,181,1784]" captionTargetBox-2="[203,1383,181,1850]" captionTargetBox-3="[170,1416,181,1008]" captionTargetId-0="figure-27@12.[206,1382,181,1850]" captionTargetId-1="figure-19@13.[227,1361,181,1784]" captionTargetId-2="figure-27@14.[203,1383,181,1850]" captionTargetId-3="figure-19@15.[170,1416,181,1008]" captionTargetPageId-0="12" captionTargetPageId-1="13" captionTargetPageId-2="14" captionTargetPageId-3="15" captionText-0="FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger." captionText-1="FIGURE 7. Magelona japonica (NMW.Z.2022.001.0001, D–G, stained with Methyl Green). A, anterior region (prostomium and chaetigers 1–13), dorsal view, showing faded pigment band; B, anterior region (prostomium and chaetigers 1–10), taken shortly after sampling (by NJ), dorsal view, pigment band clear; C, anterior region (prostomium and chaetigers 1–12), ventral view; D, prostomium and chaetigers 1–4, dorsal view; E, anterior region, dorsal view; F, prostomium and chaetigers 1–10, ventrolateral view; G, prostomium, burrowing organ and chaetigers 1–3, ventral view. BO = burrowing organ, Pp = palp, Pr = prostomium, PB = pigment band, numbers indicate chaetiger." captionText-2="FIGURE 8. Magelona japonica (NMW.Z.2022.001.0001, A–B, stained with Methyl Green; C–G, putative syntypes ZIHU 2789). A, chaetigers 6–15, dorsal view; B, chaetigers 7–15, ventral view; C, potential syntype drawn by Okuda (1937a), lateral view; D, dissected anterior fragment, dorsal view; E, prostomium and thorax, dorsal view; F, prostomium and thorax, ventral view; G, posterior fragment, lateral view. Ab = abdomen, Ach = achaetous region, BO = burrowing organ, Pg = pygidium, PH = prostomial horns, Pp = palp, Pr = prostomium, Th = thorax, numbers indicate chaetiger." captionText-3="FIGURE 9. Known distribution records for Magelona japonica." figureDoi-0="http://doi.org/10.5281/zenodo.7235622" figureDoi-1="http://doi.org/10.5281/zenodo.7235624" figureDoi-2="http://doi.org/10.5281/zenodo.7235633" figureDoi-3="http://doi.org/10.5281/zenodo.7235635" httpUri-0="https://zenodo.org/record/7235622/files/figure.png" httpUri-1="https://zenodo.org/record/7235624/files/figure.png" httpUri-2="https://zenodo.org/record/7235633/files/figure.png" httpUri-3="https://zenodo.org/record/7235635/files/figure.png" pageId="9" pageNumber="460">Figs 6–9</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="3AE43CFCE37925467E86096C9F43FEC8" box="[151,535,259,285]" pageId="9" pageNumber="460" type="reference_group">
<paragraph id="72416F77E37925467E86096C9F43FEC8" blockId="9.[151,977,151,322]" box="[151,535,259,285]" pageId="9" pageNumber="460">
<taxonomicName id="B5FE14F4E37925467E86096C9F43FEC8" ID-CoL="3XGS9" authority="Okuda, 1937 b" authorityName="Okuda" authorityYear="1937" box="[151,535,259,285]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="9" pageNumber="460" phylum="Annelida" rank="species" species="japonica">
<emphasis id="408AB365E37925467E86096C9C26FEC8" box="[151,370,259,285]" italics="true" pageId="9" pageNumber="460">Magelona japonica</emphasis>
<bibRefCitation id="166F1286E37925467F68096C9F43FEC8" author="Okuda, S." box="[377,535,259,285]" pageId="9" pageNumber="460" pagination="45 - 69" refId="ref24790" refString="Okuda, S. (1937 b) Annelida Polychaeta in Onagawa Bay and its Vicinity I. Polychaeta Sedentaria. Science Reports of the Tohoku Imperial University, Fourth Series, Biology, 12 (1), 45 - 69." type="journal article" year="1937">Okuda, 1937b</bibRefCitation>
</taxonomicName>
</paragraph>
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<subSubSection id="3AE43CFCE37925467E86094799E2FE04" pageId="9" pageNumber="460" type="materials_examined">
<paragraph id="72416F77E37925467E8609479E85FE94" blockId="9.[151,977,151,322]" box="[151,977,295,322]" pageId="9" pageNumber="460">
<materialsCitation id="C296652AE37925467E8609479CC6FE94" ID-GBIF-Occurrence="3944665308" box="[151,402,295,322]" location="Incheon" pageId="9" pageNumber="460" specimenCount="1" stateProvince="Incheon" typeStatus="holotype">
<emphasis id="408AB365E37925467E8609479C73FE94" box="[151,295,295,321]" italics="true" pageId="9" pageNumber="460">
<typeStatus id="AD45D1D5E37925467E8609479D9FFE94" box="[151,203,296,321]" pageId="9" pageNumber="460">Type</typeStatus>
locality
</emphasis>
: 
<collectingRegion id="B03AA195E37925467F2409489CC6FE94" box="[309,402,295,321]" country="South Korea" name="Incheon" pageId="9" pageNumber="460">Incheon</collectingRegion>
</materialsCitation>
, Korean Archipelago; Onagawa, 
<collectingRegion id="B03AA195E37925467D1709489E85FE94" box="[774,977,295,321]" country="Japan" name="Miyagi" pageId="9" pageNumber="460">Miyagi Prefecture</collectingRegion>
</paragraph>
<paragraph id="72416F77E37925467E86090099E2FE04" blockId="9.[151,1437,367,2014]" pageId="9" pageNumber="460">
<emphasis id="408AB365E37925467E8609009CD4FE5C" bold="true" box="[151,384,367,393]" pageId="9" pageNumber="460">Material examined.</emphasis>
<materialsCitation id="C296652AE37925467F9609009CBDFE78" ID-GBIF-Occurrence="3944665311" collectingDate="1936-07" collectionCode="ZIHU" country="South Korea" location="Incheon" pageId="9" pageNumber="460" specimenCode="ZIHU 2789, 9" specimenCount="1" stateProvince="Incheon" typeStatus="syntype">
<collectingCountry id="0AE92FE7E37925467F9609009F1AFE5C" box="[391,590,367,393]" name="South Korea" pageId="9" pageNumber="460">SOUTH KOREA</collectingCountry>
, 
<collectingRegion id="B03AA195E37925467C4809009FE2FE5C" box="[601,694,367,393]" country="South Korea" name="Incheon" pageId="9" pageNumber="460">Incheon</collectingRegion>
, 
<typeStatus id="AD45D1D5E37925467CD0091F9E77FE5F" box="[705,803,368,394]" pageId="9" pageNumber="460" type="syntype">syntypes</typeStatus>
(
<specimenCode id="2258C70CE37925467D2009009EECFE5C" box="[817,952,367,393]" collectionCode="ZIHU" country="Japan" httpUri="http://grbio.org/cool/mc14-1jj5" name="Zoological Institute, Hokkaido University" pageId="9" pageNumber="460">ZIHU 2789</specimenCode>
, 
<specimenCode id="2258C70CE37925467DD309009E84FE5C" box="[962,976,367,393]" collectionCode="ZIHU" country="Japan" httpUri="http://grbio.org/cool/mc14-1jj5" name="Zoological Institute, Hokkaido University" pageId="9" pageNumber="460">9</specimenCode>
af, 18 f, pf) from soft, muddy sediments, 
<date id="064049B7E37925467E8609FC9C5CFE78" box="[151,264,403,429]" pageId="9" pageNumber="460" value="1936-07">
<collectingDate id="1604B05FE37925467E8609FC9C5CFE78" box="[151,264,403,429]" pageId="9" pageNumber="460" value="1936-07">July 1936</collectingDate>
</date>
, collector unknown
</materialsCitation>
. 
<materialsCitation id="C296652AE37925467FE209FC99E6FE04" ID-GBIF-Occurrence="3944665309" collectingDate="2014-11-05" collectionCode="NMW, R, V" country="Japan" elevation="14" latitude="34.3088" location="Toyoshiomaru Stn" longLatPrecision="6" longitude="133.2294" pageId="9" pageNumber="460" specimenCount="1" typeStatus="syntype">
<collectingCountry id="0AE92FE7E37925467FE209FC9F1CFE78" box="[499,584,403,429]" name="Japan" pageId="9" pageNumber="460">JAPAN</collectingCountry>
(
<collectionCode id="14EFF7B2E37925467C4709FC9FF5FE78" box="[598,673,403,429]" country="Austria" httpUri="http://grbio.org/cool/c7yt-hh77" name="Naturhistorisches Museum, Wien" pageId="9" pageNumber="460">NMW</collectionCode>
.Z.2022.001.0001, af), 
<collectionCode id="14EFF7B2E37925467DB109FB9EE2FE7B" box="[928,950,404,430]" country="Chile" name="Departamento de Geologia, Universidad de Chile" pageId="9" pageNumber="460">R</collectionCode>
. 
<collectionCode id="14EFF7B2E37925467DAB09FB9E9FFE7B" box="[954,971,404,430]" country="Canada" lsid="urn:lsid:biocol.org:col:13946" name="Royal British Columbia Museum - Herbarium" pageId="9" pageNumber="460" type="Museum">V</collectionCode>
. 
<location id="772139ACE37925467DC909FC99F0FE78" LSID="urn:lsid:plazi:treatment:FA57DE61E37925447E8608F898D5F840:772139ACE37925467DC909FC99F0FE78" box="[984,1188,403,429]" country="Japan" latitude="34.3088" longLatPrecision="6" longitude="133.2294" name="Toyoshiomaru Stn" pageId="9" pageNumber="460">
<emphasis id="408AB365E37925467DC909FC9923FE78" box="[984,1143,403,429]" italics="true" pageId="9" pageNumber="460">Toyoshiomaru</emphasis>
Stn
</location>
4 (
<geoCoordinate id="17CA09B0E37925467AD909FC9873FE78" box="[1224,1319,403,429]" degrees="34.3098" direction="north" orientation="latitude" pageId="9" pageNumber="460" precision="5" value="34.3098">34.3098</geoCoordinate>
, 
<geoCoordinate id="17CA09B0E37925467B2209FC98C8FE78" box="[1331,1436,403,429]" degrees="133.2260" direction="east" orientation="longitude" pageId="9" pageNumber="460" precision="5" value="133.226">133.2260</geoCoordinate>
to 34.3088, 133.2294), dredge, 
<date id="064049B7E37925467FE609D89F2CFE07" box="[503,632,439,466]" pageId="9" pageNumber="460" value="2014-11-05">
<collectingDate id="1604B05FE37925467FE609D89F2CFE07" box="[503,632,439,466]" pageId="9" pageNumber="460" value="2014-11-05">05/11/2014</collectingDate>
</date>
, collected by NJ, sandy sediments, 
<elevation id="F9D38844E37925467A1709D899E6FE04" box="[1030,1202,439,466]" metricMagnitude="1" metricUnit="m" metricValue="1.35" metricValueMax="1.4" metricValueMin="1.3" pageId="9" pageNumber="460" unit="m" value="13.5" valueMax="14.0" valueMin="13.0">
<quantity id="B506C292E37925467A1709D8993DFE07" box="[1030,1129,439,466]" metricMagnitude="1" metricUnit="m" metricValue="1.35" metricValueMax="1.4" metricValueMin="1.3" pageId="9" pageNumber="460" unit="m" value="13.5" valueMax="14.0" valueMin="13.0">13–14 m</quantity>
depth
</elevation>
</materialsCitation>
.
</paragraph>
</subSubSection>
<subSubSection id="3AE43CFCE37925467ED609B49EBFFDB4" pageId="9" pageNumber="460" type="diagnosis">
<paragraph id="72416F77E37925467ED609B49EBFFDB4" blockId="9.[151,1437,367,2014]" pageId="9" pageNumber="460">
<emphasis id="408AB365E37925467ED609B49C16FE20" bold="true" box="[199,322,475,501]" pageId="9" pageNumber="460">Diagnosis.</emphasis>
Prostomium wider than long, horns present. Chaetigers 1–9 with slender triangular lamellae, neuropodia distinctly scoop-shaped on chaetigers 1–4. Distinct pigment band on posterior thorax. All thoracic chaetae capillary. Abdominal lateral lamellae roughly equal in size, triangular to foliaceous with pointed tips. Abdominal hooks tridentate, in two groups, 
<emphasis id="408AB365E37925467C970A279FB1FDB7" box="[646,741,584,610]" italics="true" pageId="9" pageNumber="460">vis-à-vis</emphasis>
. No pouches observed.
</paragraph>
</subSubSection>
<subSubSection id="3AE43CFCE37925457ED60A049989FC88" lastPageId="10" lastPageNumber="461" pageId="9" pageNumber="460" type="description">
<paragraph id="72416F77E37925467ED60A049FCFFC70" blockId="9.[151,1437,367,2014]" pageId="9" pageNumber="460">
<emphasis id="408AB365E37925467ED60A049C0DFD50" bold="true" box="[199,345,619,645]" pageId="9" pageNumber="460">Dimensions.</emphasis>
A large, stout species; with a slight constriction between thorax and abdomen (
<figureCitation id="EAC573F2E37925467ACD0A04986FFD50" box="[1244,1339,619,645]" captionStart="FIGURE 6" captionStartId="12.[151,250,1874,1898]" captionTargetBox="[222,1382,198,1837]" captionTargetId="figure-27@12.[206,1382,181,1850]" captionTargetPageId="12" captionText="FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235622" httpUri="https://zenodo.org/record/7235622/files/figure.png" pageId="9" pageNumber="460">Figs 6A</figureCitation>
; 
<figureCitation id="EAC573F2E37925467B590A0498DAFD50" box="[1352,1422,619,645]" captionStart="FIGURE 7" captionStartId="13.[151,250,1808,1832]" captionTargetBox="[227,1361,181,1784]" captionTargetId="figure-19@13.[227,1361,181,1784]" captionTargetPageId="13" captionText="FIGURE 7. Magelona japonica (NMW.Z.2022.001.0001, D–G, stained with Methyl Green). A, anterior region (prostomium and chaetigers 1–13), dorsal view, showing faded pigment band; B, anterior region (prostomium and chaetigers 1–10), taken shortly after sampling (by NJ), dorsal view, pigment band clear; C, anterior region (prostomium and chaetigers 1–12), ventral view; D, prostomium and chaetigers 1–4, dorsal view; E, anterior region, dorsal view; F, prostomium and chaetigers 1–10, ventrolateral view; G, prostomium, burrowing organ and chaetigers 1–3, ventral view. BO = burrowing organ, Pp = palp, Pr = prostomium, PB = pigment band, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235624" httpUri="https://zenodo.org/record/7235624/files/figure.png" pageId="9" pageNumber="460">7A, C</figureCitation>
), thorax dorsoventrally flattened, much thinner (when viewed laterally, 
<figureCitation id="EAC573F2E37925467D8F0AE09EA6FD7C" box="[926,1010,655,681]" captionStart="FIGURE 8" captionStartId="14.[151,250,1874,1898]" captionTargetBox="[203,1383,181,1850]" captionTargetId="figure-27@14.[203,1383,181,1850]" captionTargetPageId="14" captionText="FIGURE 8. Magelona japonica (NMW.Z.2022.001.0001, A–B, stained with Methyl Green; C–G, putative syntypes ZIHU 2789). A, chaetigers 6–15, dorsal view; B, chaetigers 7–15, ventral view; C, potential syntype drawn by Okuda (1937a), lateral view; D, dissected anterior fragment, dorsal view; E, prostomium and thorax, dorsal view; F, prostomium and thorax, ventral view; G, posterior fragment, lateral view. Ab = abdomen, Ach = achaetous region, BO = burrowing organ, Pg = pygidium, PH = prostomial horns, Pp = palp, Pr = prostomium, Th = thorax, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235633" httpUri="https://zenodo.org/record/7235633/files/figure.png" pageId="9" pageNumber="460">Fig. 8C</figureCitation>
), but wider than the rounded abdomen (when viewed dorsally). Chaetigers 5–7 marginally wider than anterior and posterior thorax (when viewed dorsally). Japanese specimen, anterior fragment: prostomium 
<quantity id="B506C292E37925467CF80AB89E16FD27" box="[745,834,727,754]" metricMagnitude="-4" metricUnit="m" metricValue="6.0" pageId="9" pageNumber="460" unit="mm" value="0.6">0.6 mm</quantity>
long, 
<quantity id="B506C292E37925467D9F0AB89EB3FD27" box="[910,999,727,754]" metricMagnitude="-3" metricUnit="m" metricValue="1.1" pageId="9" pageNumber="460" unit="mm" value="1.1">1.1 mm</quantity>
wide; thorax 
<quantity id="B506C292E37925467A9A0AB899B0FD27" box="[1163,1252,727,754]" metricMagnitude="-3" metricUnit="m" metricValue="3.9" pageId="9" pageNumber="460" unit="mm" value="3.9">3.9 mm</quantity>
long (including prostomium), 
<quantity id="B506C292E37925467F290A949CCBFCC3" box="[312,415,763,790]" metricMagnitude="-4" metricUnit="m" metricValue="9.8" pageId="9" pageNumber="460" unit="mm" value="0.98">0.98 mm</quantity>
wide (between chaetigers 6 and 7); total length 
<quantity id="B506C292E37925467DC10A94997CFCC3" box="[976,1064,763,790]" metricMagnitude="-3" metricUnit="m" metricValue="6.1" pageId="9" pageNumber="460" unit="mm" value="6.1">6.1 mm</quantity>
for 15 chaetigers (last chaetiger dissected and slide mounted). Twenty-eight fragments of suspected 
<typeStatus id="AD45D1D5E37925467DA50B4F995FFCEF" box="[948,1035,800,826]" pageId="9" pageNumber="460" type="syntype">syntype</typeStatus>
material observed, including nine anterior fragments ranging from 3–34 chaetigers and 
<quantity id="B506C292E37925467CFF0B2C9ED6FC8B" box="[750,898,835,862]" metricMagnitude="-3" metricUnit="m" metricValue="6.5" metricValueMax="11.5" metricValueMin="1.5" pageId="9" pageNumber="460" unit="mm" value="6.5" valueMax="11.5" valueMin="1.5">1.5–11.5 mm</quantity>
in length (N.B. 
<typeStatus id="AD45D1D5E37925467A290B2B99DBFC8B" box="[1080,1167,836,862]" pageId="9" pageNumber="460" type="syntype">syntype</typeStatus>
material has previously dried out, so measurements approximate given condition). Lateral margins of thoracic chaetigers characteristically rounded and bulbous (
<figureCitation id="EAC573F2E37925467F800BE49CBBFC70" box="[401,495,907,933]" captionStart="FIGURE 6" captionStartId="12.[151,250,1874,1898]" captionTargetBox="[222,1382,198,1837]" captionTargetId="figure-27@12.[206,1382,181,1850]" captionTargetPageId="12" captionText="FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235622" httpUri="https://zenodo.org/record/7235622/files/figure.png" pageId="9" pageNumber="460">Figs 6A</figureCitation>
; 
<figureCitation id="EAC573F2E37925467FEA0BE49F34FC73" box="[507,608,907,934]" captionStart="FIGURE 7" captionStartId="13.[151,250,1808,1832]" captionTargetBox="[227,1361,181,1784]" captionTargetId="figure-19@13.[227,1361,181,1784]" captionTargetPageId="13" captionText="FIGURE 7. Magelona japonica (NMW.Z.2022.001.0001, D–G, stained with Methyl Green). A, anterior region (prostomium and chaetigers 1–13), dorsal view, showing faded pigment band; B, anterior region (prostomium and chaetigers 1–10), taken shortly after sampling (by NJ), dorsal view, pigment band clear; C, anterior region (prostomium and chaetigers 1–12), ventral view; D, prostomium and chaetigers 1–4, dorsal view; E, anterior region, dorsal view; F, prostomium and chaetigers 1–10, ventrolateral view; G, prostomium, burrowing organ and chaetigers 1–3, ventral view. BO = burrowing organ, Pp = palp, Pr = prostomium, PB = pigment band, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235624" httpUri="https://zenodo.org/record/7235624/files/figure.png" pageId="9" pageNumber="460">7A–C, E</figureCitation>
; 
<figureCitation id="EAC573F2E37925467C7A0BE49FDAFC70" box="[619,654,907,933]" captionStart="FIGURE 8" captionStartId="14.[151,250,1874,1898]" captionTargetBox="[203,1383,181,1850]" captionTargetId="figure-27@14.[203,1383,181,1850]" captionTargetPageId="14" captionText="FIGURE 8. Magelona japonica (NMW.Z.2022.001.0001, A–B, stained with Methyl Green; C–G, putative syntypes ZIHU 2789). A, chaetigers 6–15, dorsal view; B, chaetigers 7–15, ventral view; C, potential syntype drawn by Okuda (1937a), lateral view; D, dissected anterior fragment, dorsal view; E, prostomium and thorax, dorsal view; F, prostomium and thorax, ventral view; G, posterior fragment, lateral view. Ab = abdomen, Ach = achaetous region, BO = burrowing organ, Pg = pygidium, PH = prostomial horns, Pp = palp, Pr = prostomium, Th = thorax, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235633" httpUri="https://zenodo.org/record/7235633/files/figure.png" pageId="9" pageNumber="460">8E</figureCitation>
).
</paragraph>
<paragraph id="72416F77E37925467ED60BC09C84FAAC" blockId="9.[151,1437,367,2014]" pageId="9" pageNumber="460">
<emphasis id="408AB365E37925467ED60BC09C0DFC1C" bold="true" box="[199,345,943,969]" pageId="9" pageNumber="460">Description.</emphasis>
Prostomium triangular (
<figureCitation id="EAC573F2E37925467C790BC09F96FC1C" box="[616,706,943,969]" captionStart="FIGURE 6" captionStartId="12.[151,250,1874,1898]" captionTargetBox="[222,1382,198,1837]" captionTargetId="figure-27@12.[206,1382,181,1850]" captionTargetPageId="12" captionText="FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235622" httpUri="https://zenodo.org/record/7235622/files/figure.png" pageId="9" pageNumber="460">Figs 6B</figureCitation>
; 
<figureCitation id="EAC573F2E37925467CDC0BC09FA7FC1C" box="[717,755,943,969]" captionStart="FIGURE 7" captionStartId="13.[151,250,1808,1832]" captionTargetBox="[227,1361,181,1784]" captionTargetId="figure-19@13.[227,1361,181,1784]" captionTargetPageId="13" captionText="FIGURE 7. Magelona japonica (NMW.Z.2022.001.0001, D–G, stained with Methyl Green). A, anterior region (prostomium and chaetigers 1–13), dorsal view, showing faded pigment band; B, anterior region (prostomium and chaetigers 1–10), taken shortly after sampling (by NJ), dorsal view, pigment band clear; C, anterior region (prostomium and chaetigers 1–12), ventral view; D, prostomium and chaetigers 1–4, dorsal view; E, anterior region, dorsal view; F, prostomium and chaetigers 1–10, ventrolateral view; G, prostomium, burrowing organ and chaetigers 1–3, ventral view. BO = burrowing organ, Pp = palp, Pr = prostomium, PB = pigment band, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235624" httpUri="https://zenodo.org/record/7235624/files/figure.png" pageId="9" pageNumber="460">7D</figureCitation>
), wider than long (L:W ratio 0.55). Distinct prostomial horns, anterior margin triangular, not entirely smooth but not as marked as crenulations. Lateral prostomial margins slightly rounded, base clearly expanded. Prostomium with two pairs of prominent longitudinal dorsal muscular ridges, inners abutting for a third of the length, diverging at both ends. Outer pair of ridges abutting inner pair for majority of length. Markings either side of the ridges fairly weak, not as distinct as in other species. Burrowing organ partially everted (
<figureCitation id="EAC573F2E37925467EE80C0C9CC0FBA8" box="[249,404,1123,1150]" captionStart="FIGURE 7" captionStartId="13.[151,250,1808,1832]" captionTargetBox="[227,1361,181,1784]" captionTargetId="figure-19@13.[227,1361,181,1784]" captionTargetPageId="13" captionText="FIGURE 7. Magelona japonica (NMW.Z.2022.001.0001, D–G, stained with Methyl Green). A, anterior region (prostomium and chaetigers 1–13), dorsal view, showing faded pigment band; B, anterior region (prostomium and chaetigers 1–10), taken shortly after sampling (by NJ), dorsal view, pigment band clear; C, anterior region (prostomium and chaetigers 1–12), ventral view; D, prostomium and chaetigers 1–4, dorsal view; E, anterior region, dorsal view; F, prostomium and chaetigers 1–10, ventrolateral view; G, prostomium, burrowing organ and chaetigers 1–3, ventral view. BO = burrowing organ, Pp = palp, Pr = prostomium, PB = pigment band, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235624" httpUri="https://zenodo.org/record/7235624/files/figure.png" pageId="9" pageNumber="460">Figs 7C, F, G</figureCitation>
; 
<figureCitation id="EAC573F2E37925467FB10C0C9CB4FBA8" box="[416,480,1123,1149]" captionStart="FIGURE 8" captionStartId="14.[151,250,1874,1898]" captionTargetBox="[203,1383,181,1850]" captionTargetId="figure-27@14.[203,1383,181,1850]" captionTargetPageId="14" captionText="FIGURE 8. Magelona japonica (NMW.Z.2022.001.0001, A–B, stained with Methyl Green; C–G, putative syntypes ZIHU 2789). A, chaetigers 6–15, dorsal view; B, chaetigers 7–15, ventral view; C, potential syntype drawn by Okuda (1937a), lateral view; D, dissected anterior fragment, dorsal view; E, prostomium and thorax, dorsal view; F, prostomium and thorax, ventral view; G, posterior fragment, lateral view. Ab = abdomen, Ach = achaetous region, BO = burrowing organ, Pg = pygidium, PH = prostomial horns, Pp = palp, Pr = prostomium, Th = thorax, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235633" httpUri="https://zenodo.org/record/7235633/files/figure.png" pageId="9" pageNumber="460">8C, F</figureCitation>
) on Japanese specimen and on 
<specimenCount id="64F8A4FEE37925467D530C0C9E89FBAB" box="[834,989,1123,1150]" pageId="9" pageNumber="460" type="generic" typeStatus="syntypes">four syntypes</specimenCount>
, oval (shape of full eversion unknown). Longitudinally ridged inferiorly, superior surface not observed. Palp stubs (showing signs of regeneration) on Japanese specimen, arising ventrolaterally from base of prostomium, thick (
<figureCitation id="EAC573F2E37925467DFE0CC4991AFB10" box="[1007,1102,1195,1221]" captionStart="FIGURE 6" captionStartId="12.[151,250,1874,1898]" captionTargetBox="[222,1382,198,1837]" captionTargetId="figure-27@12.[206,1382,181,1850]" captionTargetPageId="12" captionText="FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235622" httpUri="https://zenodo.org/record/7235622/files/figure.png" pageId="9" pageNumber="460">Figs 6A</figureCitation>
; 
<figureCitation id="EAC573F2E37925467A4A0CC4993EFB10" box="[1115,1130,1195,1221]" captionStart="FIGURE 7" captionStartId="13.[151,250,1808,1832]" captionTargetBox="[227,1361,181,1784]" captionTargetId="figure-19@13.[227,1361,181,1784]" captionTargetPageId="13" captionText="FIGURE 7. Magelona japonica (NMW.Z.2022.001.0001, D–G, stained with Methyl Green). A, anterior region (prostomium and chaetigers 1–13), dorsal view, showing faded pigment band; B, anterior region (prostomium and chaetigers 1–10), taken shortly after sampling (by NJ), dorsal view, pigment band clear; C, anterior region (prostomium and chaetigers 1–12), ventral view; D, prostomium and chaetigers 1–4, dorsal view; E, anterior region, dorsal view; F, prostomium and chaetigers 1–10, ventrolateral view; G, prostomium, burrowing organ and chaetigers 1–3, ventral view. BO = burrowing organ, Pp = palp, Pr = prostomium, PB = pigment band, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235624" httpUri="https://zenodo.org/record/7235624/files/figure.png" pageId="9" pageNumber="460">7</figureCitation>
) (now detached, present in vial). Palps reaching approximately chaetigers 1–2. A few short papillae present on distal portion of left-hand palp. Exact number of papillae and rows indeterminable. Palps retained partially on 
<specimenCount id="64F8A4FEE37925467A060C9C9878FAD8" box="[1047,1324,1267,1294]" pageId="9" pageNumber="460" type="generic" typeStatus="syntype">three syntype specimens</specimenCount>
(
<figureCitation id="EAC573F2E37925467B2D0C9C98C7FAD8" box="[1340,1427,1267,1293]" captionStart="FIGURE 8" captionStartId="14.[151,250,1874,1898]" captionTargetBox="[203,1383,181,1850]" captionTargetId="figure-27@14.[203,1383,181,1850]" captionTargetPageId="14" captionText="FIGURE 8. Magelona japonica (NMW.Z.2022.001.0001, A–B, stained with Methyl Green; C–G, putative syntypes ZIHU 2789). A, chaetigers 6–15, dorsal view; B, chaetigers 7–15, ventral view; C, potential syntype drawn by Okuda (1937a), lateral view; D, dissected anterior fragment, dorsal view; E, prostomium and thorax, dorsal view; F, prostomium and thorax, ventral view; G, posterior fragment, lateral view. Ab = abdomen, Ach = achaetous region, BO = burrowing organ, Pg = pygidium, PH = prostomial horns, Pp = palp, Pr = prostomium, Th = thorax, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235633" httpUri="https://zenodo.org/record/7235633/files/figure.png" pageId="9" pageNumber="460">Fig. 8C</figureCitation>
) (one loose palp present in vial), reaching chaetigers 12–16, non-papillated region reaching chaetiger 2. Papillae long; one row either side of indistinct longitudinal line on distal portion, two rows either side medially, and three rows either side proximally.
</paragraph>
<paragraph id="72416F77E37925467ED60DEC9854F968" blockId="9.[151,1437,367,2014]" pageId="9" pageNumber="460">
Achaetous region behind prostomium, roughly one and a half times the size of chaetiger 1 (
<figureCitation id="EAC573F2E37925467AA40DEC9845FA48" box="[1205,1297,1411,1437]" captionStart="FIGURE 6" captionStartId="12.[151,250,1874,1898]" captionTargetBox="[222,1382,198,1837]" captionTargetId="figure-27@12.[206,1382,181,1850]" captionTargetPageId="12" captionText="FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235622" httpUri="https://zenodo.org/record/7235622/files/figure.png" pageId="9" pageNumber="460">Figs 6A</figureCitation>
; 
<figureCitation id="EAC573F2E37925467B0D0DEB980BFA4B" box="[1308,1375,1412,1438]" captionStart="FIGURE 7" captionStartId="13.[151,250,1808,1832]" captionTargetBox="[227,1361,181,1784]" captionTargetId="figure-19@13.[227,1361,181,1784]" captionTargetPageId="13" captionText="FIGURE 7. Magelona japonica (NMW.Z.2022.001.0001, D–G, stained with Methyl Green). A, anterior region (prostomium and chaetigers 1–13), dorsal view, showing faded pigment band; B, anterior region (prostomium and chaetigers 1–10), taken shortly after sampling (by NJ), dorsal view, pigment band clear; C, anterior region (prostomium and chaetigers 1–12), ventral view; D, prostomium and chaetigers 1–4, dorsal view; E, anterior region, dorsal view; F, prostomium and chaetigers 1–10, ventrolateral view; G, prostomium, burrowing organ and chaetigers 1–3, ventral view. BO = burrowing organ, Pp = palp, Pr = prostomium, PB = pigment band, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235624" httpUri="https://zenodo.org/record/7235624/files/figure.png" pageId="9" pageNumber="460">7D, E</figureCitation>
; 
<figureCitation id="EAC573F2E37925467B7B0DEC98DBFA48" box="[1386,1423,1411,1437]" captionStart="FIGURE 8" captionStartId="14.[151,250,1874,1898]" captionTargetBox="[203,1383,181,1850]" captionTargetId="figure-27@14.[203,1383,181,1850]" captionTargetPageId="14" captionText="FIGURE 8. Magelona japonica (NMW.Z.2022.001.0001, A–B, stained with Methyl Green; C–G, putative syntypes ZIHU 2789). A, chaetigers 6–15, dorsal view; B, chaetigers 7–15, ventral view; C, potential syntype drawn by Okuda (1937a), lateral view; D, dissected anterior fragment, dorsal view; E, prostomium and thorax, dorsal view; F, prostomium and thorax, ventral view; G, posterior fragment, lateral view. Ab = abdomen, Ach = achaetous region, BO = burrowing organ, Pg = pygidium, PH = prostomial horns, Pp = palp, Pr = prostomium, Th = thorax, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235633" httpUri="https://zenodo.org/record/7235633/files/figure.png" pageId="9" pageNumber="460">8D</figureCitation>
). Chaetigers 1–8 similar (
<figureCitation id="EAC573F2E37925467FBB0DC89F12FA14" box="[426,582,1447,1473]" captionStart="FIGURE 6" captionStartId="12.[151,250,1874,1898]" captionTargetBox="[222,1382,198,1837]" captionTargetId="figure-27@12.[206,1382,181,1850]" captionTargetPageId="12" captionText="FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235622" httpUri="https://zenodo.org/record/7235622/files/figure.png" pageId="9" pageNumber="460">Figs 6A, C–J</figureCitation>
; 
<figureCitation id="EAC573F2E37925467C420DC89FEEFA14" box="[595,698,1447,1474]" captionStart="FIGURE 7" captionStartId="13.[151,250,1808,1832]" captionTargetBox="[227,1361,181,1784]" captionTargetId="figure-19@13.[227,1361,181,1784]" captionTargetPageId="13" captionText="FIGURE 7. Magelona japonica (NMW.Z.2022.001.0001, D–G, stained with Methyl Green). A, anterior region (prostomium and chaetigers 1–13), dorsal view, showing faded pigment band; B, anterior region (prostomium and chaetigers 1–10), taken shortly after sampling (by NJ), dorsal view, pigment band clear; C, anterior region (prostomium and chaetigers 1–12), ventral view; D, prostomium and chaetigers 1–4, dorsal view; E, anterior region, dorsal view; F, prostomium and chaetigers 1–10, ventrolateral view; G, prostomium, burrowing organ and chaetigers 1–3, ventral view. BO = burrowing organ, Pp = palp, Pr = prostomium, PB = pigment band, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235624" httpUri="https://zenodo.org/record/7235624/files/figure.png" pageId="9" pageNumber="460">7A, E, F</figureCitation>
); parapodia biramous. Notopodia with low triangular, prechaetal lamellae confluent with slender, smooth-edged, triangular postchaetal lamellae. Lamellae decrease in size towards mid thorax, those of chaetiger 5 and 6 much smaller than preceding chaetigers, but lamellae increase again on chaetigers 7 and 8 (although not as large as anterior thorax). No superior dorsal lobes present on thoracic chaetigers. Neuropodial lamellae distinctly scoop-shaped on chaetigers 1–4 (
<figureCitation id="EAC573F2E37925467D980E589953F984" box="[905,1031,1591,1617]" captionStart="FIGURE 6" captionStartId="12.[151,250,1874,1898]" captionTargetBox="[222,1382,198,1837]" captionTargetId="figure-27@12.[206,1382,181,1850]" captionTargetPageId="12" captionText="FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235622" httpUri="https://zenodo.org/record/7235622/files/figure.png" pageId="9" pageNumber="460">Figs 6C–F</figureCitation>
; 
<figureCitation id="EAC573F2E37925467A040E589962F984" box="[1045,1078,1591,1617]" captionStart="FIGURE 7" captionStartId="13.[151,250,1808,1832]" captionTargetBox="[227,1361,181,1784]" captionTargetId="figure-19@13.[227,1361,181,1784]" captionTargetPageId="13" captionText="FIGURE 7. Magelona japonica (NMW.Z.2022.001.0001, D–G, stained with Methyl Green). A, anterior region (prostomium and chaetigers 1–13), dorsal view, showing faded pigment band; B, anterior region (prostomium and chaetigers 1–10), taken shortly after sampling (by NJ), dorsal view, pigment band clear; C, anterior region (prostomium and chaetigers 1–12), ventral view; D, prostomium and chaetigers 1–4, dorsal view; E, anterior region, dorsal view; F, prostomium and chaetigers 1–10, ventrolateral view; G, prostomium, burrowing organ and chaetigers 1–3, ventral view. BO = burrowing organ, Pp = palp, Pr = prostomium, PB = pigment band, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235624" httpUri="https://zenodo.org/record/7235624/files/figure.png" pageId="9" pageNumber="460">7F</figureCitation>
), tips pointed, situated directly under chaetal bundle. Neuropodial lamellae of mid and posterior thorax (
<figureCitation id="EAC573F2E37925467DD00E349965F9A0" box="[961,1073,1627,1653]" captionStart="FIGURE 6" captionStartId="12.[151,250,1874,1898]" captionTargetBox="[222,1382,198,1837]" captionTargetId="figure-27@12.[206,1382,181,1850]" captionTargetPageId="12" captionText="FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235622" httpUri="https://zenodo.org/record/7235622/files/figure.png" pageId="9" pageNumber="460">Fig. 6G–J</figureCitation>
) digitiform to slender triangular, becoming distinctly postchaetal by chaetiger 7 (
<figureCitation id="EAC573F2E37925467CBC0E109FA8F94C" box="[685,764,1663,1689]" captionStart="FIGURE 6" captionStartId="12.[151,250,1874,1898]" captionTargetBox="[222,1382,198,1837]" captionTargetId="figure-27@12.[206,1382,181,1850]" captionTargetPageId="12" captionText="FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235622" httpUri="https://zenodo.org/record/7235622/files/figure.png" pageId="9" pageNumber="460">Fig. 6I</figureCitation>
). Lamellae decrease in size to mid thorax, but increase from chaetiger 6, initially similar in size to notopodia, but becoming longer than notopodia by chaetiger 4.
</paragraph>
<paragraph id="72416F77E37925467ED60EA89C21F840" blockId="9.[151,1437,367,2014]" pageId="9" pageNumber="460">
Chaetiger 9 (
<figureCitation id="EAC573F2E37925467F490EA89CE2F934" box="[344,438,1735,1761]" captionStart="FIGURE 6" captionStartId="12.[151,250,1874,1898]" captionTargetBox="[222,1382,198,1837]" captionTargetId="figure-27@12.[206,1382,181,1850]" captionTargetPageId="12" captionText="FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235622" httpUri="https://zenodo.org/record/7235622/files/figure.png" pageId="9" pageNumber="460">Figs 6A</figureCitation>
; 
<figureCitation id="EAC573F2E37925467FD30EA89F5CF934" box="[450,520,1735,1761]" captionStart="FIGURE 8" captionStartId="14.[151,250,1874,1898]" captionTargetBox="[203,1383,181,1850]" captionTargetId="figure-27@14.[203,1383,181,1850]" captionTargetPageId="14" captionText="FIGURE 8. Magelona japonica (NMW.Z.2022.001.0001, A–B, stained with Methyl Green; C–G, putative syntypes ZIHU 2789). A, chaetigers 6–15, dorsal view; B, chaetigers 7–15, ventral view; C, potential syntype drawn by Okuda (1937a), lateral view; D, dissected anterior fragment, dorsal view; E, prostomium and thorax, dorsal view; F, prostomium and thorax, ventral view; G, posterior fragment, lateral view. Ab = abdomen, Ach = achaetous region, BO = burrowing organ, Pg = pygidium, PH = prostomial horns, Pp = palp, Pr = prostomium, Th = thorax, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235633" httpUri="https://zenodo.org/record/7235633/files/figure.png" pageId="9" pageNumber="460">8A, B</figureCitation>
): shorter and narrower than preceding chaetigers. Noto- and neuropodial lamellae similar, triangular postchaetal, smaller than on preceding chaetigers (
<figureCitation id="EAC573F2E37925467D840E849EBAF8D0" box="[917,1006,1771,1797]" captionStart="FIGURE 6" captionStartId="12.[151,250,1874,1898]" captionTargetBox="[222,1382,198,1837]" captionTargetId="figure-27@12.[206,1382,181,1850]" captionTargetPageId="12" captionText="FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235622" httpUri="https://zenodo.org/record/7235622/files/figure.png" pageId="9" pageNumber="460">Fig. 6K</figureCitation>
). No superior dorsal lobes. Notopodial lamellae below chaetal bundle, neuropodial lamellae above neurochaetae (
<figureCitation id="EAC573F2E37925467DE60F609901F8FC" box="[1015,1109,1807,1833]" captionStart="FIGURE 6" captionStartId="12.[151,250,1874,1898]" captionTargetBox="[222,1382,198,1837]" captionTargetId="figure-27@12.[206,1382,181,1850]" captionTargetPageId="12" captionText="FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235622" httpUri="https://zenodo.org/record/7235622/files/figure.png" pageId="9" pageNumber="460">Fig. 6K</figureCitation>
). Chaetae of chaetigers 1–9 simple, unilimbate winged capillaries with smooth blades, limbations slight (
<figureCitation id="EAC573F2E37925467DE50F5C9907F898" box="[1012,1107,1843,1869]" captionStart="FIGURE 6" captionStartId="12.[151,250,1874,1898]" captionTargetBox="[222,1382,198,1837]" captionTargetId="figure-27@12.[206,1382,181,1850]" captionTargetPageId="12" captionText="FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235622" httpUri="https://zenodo.org/record/7235622/files/figure.png" pageId="9" pageNumber="460">Fig. 6M</figureCitation>
). Neuropodial chaetae longer than notopodial ones, chaetal bundles of posterior thorax distinctly splayed (e.g., 
<figureCitation id="EAC573F2E37925467A280F3899F8F8A4" box="[1081,1196,1879,1905]" captionStart="FIGURE 6" captionStartId="12.[151,250,1874,1898]" captionTargetBox="[222,1382,198,1837]" captionTargetId="figure-27@12.[206,1382,181,1850]" captionTargetPageId="12" captionText="FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235622" httpUri="https://zenodo.org/record/7235622/files/figure.png" pageId="9" pageNumber="460">Fig. 6I–K</figureCitation>
). No thoracic ventral swellings observed.
</paragraph>
<paragraph id="72416F77E37925457ED60FF09C33FEB0" blockId="9.[151,1437,367,2014]" lastBlockId="10.[151,1437,151,2013]" lastPageId="10" lastPageNumber="461" pageId="9" pageNumber="460">
Parapodia of abdominal chaetigers (
<figureCitation id="EAC573F2E37925467C720FF09F94F86C" box="[611,704,1951,1977]" captionStart="FIGURE 6" captionStartId="12.[151,250,1874,1898]" captionTargetBox="[222,1382,198,1837]" captionTargetId="figure-27@12.[206,1382,181,1850]" captionTargetPageId="12" captionText="FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235622" httpUri="https://zenodo.org/record/7235622/files/figure.png" pageId="9" pageNumber="460">Figs 6L</figureCitation>
; 
<figureCitation id="EAC573F2E37925467CDF0FF09E47F86C" box="[718,787,1951,1977]" captionStart="FIGURE 8" captionStartId="14.[151,250,1874,1898]" captionTargetBox="[203,1383,181,1850]" captionTargetId="figure-27@14.[203,1383,181,1850]" captionTargetPageId="14" captionText="FIGURE 8. Magelona japonica (NMW.Z.2022.001.0001, A–B, stained with Methyl Green; C–G, putative syntypes ZIHU 2789). A, chaetigers 6–15, dorsal view; B, chaetigers 7–15, ventral view; C, potential syntype drawn by Okuda (1937a), lateral view; D, dissected anterior fragment, dorsal view; E, prostomium and thorax, dorsal view; F, prostomium and thorax, ventral view; G, posterior fragment, lateral view. Ab = abdomen, Ach = achaetous region, BO = burrowing organ, Pg = pygidium, PH = prostomial horns, Pp = palp, Pr = prostomium, Th = thorax, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235633" httpUri="https://zenodo.org/record/7235633/files/figure.png" pageId="9" pageNumber="460">8A, B</figureCitation>
) with approximately equal lateral lamellae in both rami. Lamellae marginally foliaceous to triangular in shape with pointed tips, slight basal constriction but with no obvious postchaetal expansion of lamellae behind chaetal rows. Minute to sporadic triangular dorsal (DML) and ventral (VML) processes present at inner margins of chaetal rows (
<figureCitation id="EAC573F2E37A25457D2C08D49EC2FF00" box="[829,918,187,213]" captionStart="FIGURE 6" captionStartId="12.[151,250,1874,1898]" captionTargetBox="[222,1382,198,1837]" captionTargetId="figure-27@12.[206,1382,181,1850]" captionTargetPageId="12" captionText="FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235622" httpUri="https://zenodo.org/record/7235622/files/figure.png" pageId="10" pageNumber="461">Fig. 6L</figureCitation>
). Abdominal chaetae tridentate hooded hooks (
<figureCitation id="EAC573F2E37A25457E8E08B09DA3FF2C" box="[159,247,223,249]" captionStart="FIGURE 6" captionStartId="12.[151,250,1874,1898]" captionTargetBox="[222,1382,198,1837]" captionTargetId="figure-27@12.[206,1382,181,1850]" captionTargetPageId="12" captionText="FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235622" httpUri="https://zenodo.org/record/7235622/files/figure.png" pageId="10" pageNumber="461">Fig. 6N</figureCitation>
) of similar size, superior two fangs parallel, above, but not majorly distinct from main fang. Hooks in each ramus in two groups, main fangs 
<emphasis id="408AB365E37A25457C08096C9F2AFEC8" box="[537,638,259,285]" italics="true" pageId="10" pageNumber="461">vis-à-vis,</emphasis>
group at inner margin with approximately twice as many hooks (
<figureCitation id="EAC573F2E37A25457B7E096C9D88FE94" captionStart="FIGURE 6" captionStartId="12.[151,250,1874,1898]" captionTargetBox="[222,1382,198,1837]" captionTargetId="figure-27@12.[206,1382,181,1850]" captionTargetPageId="12" captionText="FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235622" httpUri="https://zenodo.org/record/7235622/files/figure.png" pageId="10" pageNumber="461">Fig. 6A, L</figureCitation>
). Roughly ten hooks per ramus in anterior abdomen. No abdominal support chaetae (‘aciculae’) or abdominal pouches observed.
</paragraph>
<paragraph id="72416F77E37A25457ED609009CA7FE20" blockId="10.[151,1437,151,2013]" pageId="10" pageNumber="461">
<materialsCitation id="C296652AE37A25457ED609009CBAFE20" ID-GBIF-Occurrence="3944665304" county="Sand" location="Posterior of Japanese" municipality="Several" pageId="10" pageNumber="461" specimenCount="1" typeStatus="syntype">
<location id="772139ACE37A25457ED609009CEAFE5C" LSID="urn:lsid:plazi:treatment:FA57DE61E37925447E8608F898D5F840:772139ACE37A25457ED609009CEAFE5C" box="[199,446,367,393]" county="Sand" municipality="Several" name="Posterior of Japanese" pageId="10" pageNumber="461">Posterior of Japanese</location>
specimen unknown. 
<location id="772139ACE37A25457CA609009FB2FE5C" LSID="urn:lsid:plazi:treatment:FA57DE61E37925447E8608F898D5F840:772139ACE37A25457CA609009FB2FE5C" box="[695,742,367,393]" county="Sand" municipality="Several" name="One" pageId="10" pageNumber="461">One</location>
posterior fragment observed in 
<typeStatus id="AD45D1D5E37A25457A70090099ECFE5C" box="[1121,1208,367,393]" pageId="10" pageNumber="461" type="syntype">syntype</typeStatus>
material, pygidium conical and devoid of anal cirri (as noted by Okuda, likely damaged) (
<figureCitation id="EAC573F2E37A25457D8509FC9EB8FE78" box="[916,1004,403,429]" captionStart="FIGURE 8" captionStartId="14.[151,250,1874,1898]" captionTargetBox="[203,1383,181,1850]" captionTargetId="figure-27@14.[203,1383,181,1850]" captionTargetPageId="14" captionText="FIGURE 8. Magelona japonica (NMW.Z.2022.001.0001, A–B, stained with Methyl Green; C–G, putative syntypes ZIHU 2789). A, chaetigers 6–15, dorsal view; B, chaetigers 7–15, ventral view; C, potential syntype drawn by Okuda (1937a), lateral view; D, dissected anterior fragment, dorsal view; E, prostomium and thorax, dorsal view; F, prostomium and thorax, ventral view; G, posterior fragment, lateral view. Ab = abdomen, Ach = achaetous region, BO = burrowing organ, Pg = pygidium, PH = prostomial horns, Pp = palp, Pr = prostomium, Th = thorax, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235633" httpUri="https://zenodo.org/record/7235633/files/figure.png" pageId="10" pageNumber="461">Fig. 8G</figureCitation>
). 
<collectingMunicipality id="9225F50DE37A25457DEF09FC9906FE78" box="[1022,1106,403,429]" pageId="10" pageNumber="461">Several</collectingMunicipality>
ovigerous 
<typeStatus id="AD45D1D5E37A25457ADA09FC9876FE78" box="[1227,1314,403,429]" pageId="10" pageNumber="461" type="syntype">syntype</typeStatus>
specimens observed. 
<collectingCounty id="9B2017FBE37A25457F1A09D89C17FE04" box="[267,323,439,465]" pageId="10" pageNumber="461">Sand</collectingCounty>
balls and foraminifera additionally observed in the gut of 
<typeStatus id="AD45D1D5E37A25457DC609D89968FE04" box="[983,1084,439,465]" pageId="10" pageNumber="461" type="syntype">syntypes</typeStatus>
, and evidence of a tube on 
<specimenCount id="64F8A4FEE37A25457B6309D89C5BFE20" pageId="10" pageNumber="461" type="generic">two specimens</specimenCount>
, as noted by Okuda
</materialsCitation>
.
</paragraph>
<paragraph id="72416F77E37A25457ED609919989FC88" blockId="10.[151,1437,151,2013]" pageId="10" pageNumber="461">
<emphasis id="408AB365E37A25457ED609919C74FDCD" bold="true" box="[199,288,510,536]" pageId="10" pageNumber="461">Colour.</emphasis>
No living material observed, although a photograph of the freshly preserved specimen, provided by third author, shows a pale-yellow colouration with a dark reddish-brown pigment band (
<figureCitation id="EAC573F2E37A25457A970A4C998AFDE8" box="[1158,1246,547,573]" captionStart="FIGURE 7" captionStartId="13.[151,250,1808,1832]" captionTargetBox="[227,1361,181,1784]" captionTargetId="figure-19@13.[227,1361,181,1784]" captionTargetPageId="13" captionText="FIGURE 7. Magelona japonica (NMW.Z.2022.001.0001, D–G, stained with Methyl Green). A, anterior region (prostomium and chaetigers 1–13), dorsal view, showing faded pigment band; B, anterior region (prostomium and chaetigers 1–10), taken shortly after sampling (by NJ), dorsal view, pigment band clear; C, anterior region (prostomium and chaetigers 1–12), ventral view; D, prostomium and chaetigers 1–4, dorsal view; E, anterior region, dorsal view; F, prostomium and chaetigers 1–10, ventrolateral view; G, prostomium, burrowing organ and chaetigers 1–3, ventral view. BO = burrowing organ, Pp = palp, Pr = prostomium, PB = pigment band, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235624" httpUri="https://zenodo.org/record/7235624/files/figure.png" pageId="10" pageNumber="461">Fig. 7B</figureCitation>
) in the posterior thorax (now faded to a large extent, 
<figureCitation id="EAC573F2E37A25457C340A289FC8FDB4" box="[549,668,583,609]" captionStart="FIGURE 7" captionStartId="13.[151,250,1808,1832]" captionTargetBox="[227,1361,181,1784]" captionTargetId="figure-19@13.[227,1361,181,1784]" captionTargetPageId="13" captionText="FIGURE 7. Magelona japonica (NMW.Z.2022.001.0001, D–G, stained with Methyl Green). A, anterior region (prostomium and chaetigers 1–13), dorsal view, showing faded pigment band; B, anterior region (prostomium and chaetigers 1–10), taken shortly after sampling (by NJ), dorsal view, pigment band clear; C, anterior region (prostomium and chaetigers 1–12), ventral view; D, prostomium and chaetigers 1–4, dorsal view; E, anterior region, dorsal view; F, prostomium and chaetigers 1–10, ventrolateral view; G, prostomium, burrowing organ and chaetigers 1–3, ventral view. BO = burrowing organ, Pp = palp, Pr = prostomium, PB = pigment band, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235624" httpUri="https://zenodo.org/record/7235624/files/figure.png" pageId="10" pageNumber="461">Fig. 7A, C</figureCitation>
). Band strongest between chaetigers 5–9, but with smaller pigmented regions adjacent to parapodia on chaetigers 3–4. Pigment band extends around the body from dorsal to ventral surface. 
<typeStatus id="AD45D1D5E37A25457EE80AE09C34FD7C" box="[249,352,655,681]" pageId="10" pageNumber="461" type="syntype">Syntypes</typeStatus>
have darkened to a yellow-brown colour, perhaps as a consequence of drying out previously. Staining with Methyl Green (
<figureCitation id="EAC573F2E37A25457FF30ADC9F02FD18" box="[482,598,691,717]" captionStart="FIGURE 7" captionStartId="13.[151,250,1808,1832]" captionTargetBox="[227,1361,181,1784]" captionTargetId="figure-19@13.[227,1361,181,1784]" captionTargetPageId="13" captionText="FIGURE 7. Magelona japonica (NMW.Z.2022.001.0001, D–G, stained with Methyl Green). A, anterior region (prostomium and chaetigers 1–13), dorsal view, showing faded pigment band; B, anterior region (prostomium and chaetigers 1–10), taken shortly after sampling (by NJ), dorsal view, pigment band clear; C, anterior region (prostomium and chaetigers 1–12), ventral view; D, prostomium and chaetigers 1–4, dorsal view; E, anterior region, dorsal view; F, prostomium and chaetigers 1–10, ventrolateral view; G, prostomium, burrowing organ and chaetigers 1–3, ventral view. BO = burrowing organ, Pp = palp, Pr = prostomium, PB = pigment band, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235624" httpUri="https://zenodo.org/record/7235624/files/figure.png" pageId="10" pageNumber="461">Fig. 7E, F</figureCitation>
) fairly indistinct, showing no clear pattern. Although, speckled areas from chaetigers 1–4, and abdominal interparapodial patches more distinct in stained specimens (
<figureCitation id="EAC573F2E37A25457A6D0AB8998DFD24" box="[1148,1241,727,753]" captionStart="FIGURE 6" captionStartId="12.[151,250,1874,1898]" captionTargetBox="[222,1382,198,1837]" captionTargetId="figure-27@12.[206,1382,181,1850]" captionTargetPageId="12" captionText="FIGURE 6. Magelona japonica (NMW.Z.2022.001.0001). A, anterior region (prostomium and chaetigers 1–12), dorsal view, showing pigment band between chaetigers 5–9 and Methyl Green staining pattern; B, prostomium, dorsal view; C–L, left-hand parapodia of chaetigers 1–9, 12 respectively, anterior views; M, thoracic capillary chaeta; N, tridentate abdominal hooded hook from chaetiger 15, lateral view. PH = prostomial horns, Pp = palp, Noto = notopodia, Neuro = neuropodia, TP = triangular processes, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235622" httpUri="https://zenodo.org/record/7235622/files/figure.png" pageId="10" pageNumber="461">Figs 6A</figureCitation>
; 
<figureCitation id="EAC573F2E37A25457AF20AB89872FD24" box="[1251,1318,727,753]" captionStart="FIGURE 8" captionStartId="14.[151,250,1874,1898]" captionTargetBox="[203,1383,181,1850]" captionTargetId="figure-27@14.[203,1383,181,1850]" captionTargetPageId="14" captionText="FIGURE 8. Magelona japonica (NMW.Z.2022.001.0001, A–B, stained with Methyl Green; C–G, putative syntypes ZIHU 2789). A, chaetigers 6–15, dorsal view; B, chaetigers 7–15, ventral view; C, potential syntype drawn by Okuda (1937a), lateral view; D, dissected anterior fragment, dorsal view; E, prostomium and thorax, dorsal view; F, prostomium and thorax, ventral view; G, posterior fragment, lateral view. Ab = abdomen, Ach = achaetous region, BO = burrowing organ, Pg = pygidium, PH = prostomial horns, Pp = palp, Pr = prostomium, Th = thorax, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235633" httpUri="https://zenodo.org/record/7235633/files/figure.png" pageId="10" pageNumber="461">8A, B</figureCitation>
). Thoracic staining retained on Japanese specimen for some time after staining. Transverse lines of white speckles apparent on chaetigers 1–4, and evenly spread across surface of chaetigers 5–9. Dense white speckles between chaetigers 8–10, particularly either side of mid ventral line, and as interparapodial patches in the abdomen present.
</paragraph>
</subSubSection>
<subSubSection id="3AE43CFCE37A25457ED60B099F52F934" pageId="10" pageNumber="461" type="distribution">
<paragraph id="72416F77E37A25457ED60B09985CF984" blockId="10.[151,1437,151,2013]" pageId="10" pageNumber="461">
<emphasis id="408AB365E37A25457ED60B099CA2FC55" bold="true" box="[199,502,870,897]" pageId="10" pageNumber="461">Distribution and habitat.</emphasis>
<typeStatus id="AD45D1D5E37A25457FEE0B089F63FC54" box="[511,567,871,897]" pageId="10" pageNumber="461">Type</typeStatus>
specimens were collected from soft, muddy sediments off Incheon, Korean Archipelago and Onagawa, 
<collectingRegion id="B03AA195E37A25457FDE0BE49FCAFC70" box="[463,670,907,933]" country="Japan" name="Miyagi" pageId="10" pageNumber="461">Miyagi Prefecture</collectingRegion>
. The current Japanese specimen was collected at a depth of 
<quantity id="B506C292E37A25457B2B0BE498C8FC70" box="[1338,1436,907,933]" metricMagnitude="1" metricUnit="m" metricValue="1.35" metricValueMax="1.4" metricValueMin="1.3" pageId="10" pageNumber="461" unit="m" value="13.5" valueMax="14.0" valueMin="13.0">13–14 m</quantity>
off Innoshima Island, Seto Inland Sea, 
<collectingCountry id="0AE92FE7E37A25457C440BC09FC1FC1C" box="[597,661,943,969]" name="Japan" pageId="10" pageNumber="461">Japan</collectingCountry>
(
<geoCoordinate id="17CA09B0E37A25457CB40BC09E50FC1C" box="[677,772,943,969]" degrees="34.3098" direction="north" orientation="latitude" pageId="10" pageNumber="461" precision="5" value="34.3098">34.3098</geoCoordinate>
, 
<geoCoordinate id="17CA09B0E37A25457D000BC09E2EFC1C" box="[785,890,943,969]" degrees="133.2260" direction="east" orientation="longitude" pageId="10" pageNumber="461" precision="5" value="133.226">133.2260</geoCoordinate>
to 
<geoCoordinate id="17CA09B0E37A25457DB00BC09EABFC1C" box="[929,1023,943,969]" degrees="34.3088" direction="north" orientation="latitude" pageId="10" pageNumber="461" precision="5" value="34.3088">34.3088</geoCoordinate>
, 
<geoCoordinate id="17CA09B0E37A25457A1A0BC09922FC1C" box="[1035,1142,943,969]" degrees="133.2294" direction="east" orientation="longitude" pageId="10" pageNumber="461" precision="5" value="133.2294">133.2294</geoCoordinate>
) in sandy sediments (
<figureCitation id="EAC573F2E37A25457B7E0BC09DF1FC38" captionStart="FIGURE 1" captionStartId="2.[152,255,1599,1623]" captionTargetBox="[164,1423,270,1573]" captionTargetId="figure-72@2.[164,1423,270,1573]" captionTargetPageId="2" captionText="FIGURE 1. Map highlighting the sampling locations around Japan where all observed material was collected." figureDoi="http://doi.org/10.5281/zenodo.7235612" httpUri="https://zenodo.org/record/7235612/files/figure.png" pageId="10" pageNumber="461">Fig. 1</figureCitation>
, 
<tableCitation id="3F7C5ACCE37A25457EA70BBC9C5FFC38" box="[182,267,979,1005]" captionStart="TABLE 1" captionStartId="3.[152,244,584,608]" captionTargetPageId="3" captionText="TABLE 1. Location data for all new magelonid material from Japanese waters observed" httpUri="http://table.plazi.org/id/26813FFFE373254C7E890A27991EFDB5" pageId="10" pageNumber="461" tableUuid="26813FFFE373254C7E890A27991EFDB5">Table 1</tableCitation>
). Further records from muds and sands from estuarine, intertidal flats, continental shelf and shallow sublittoral sediments exist from 
<collectingCountry id="0AE92FE7E37A25457C110B989F10FBC4" box="[512,580,1015,1041]" name="South Korea" pageId="10" pageNumber="461">Korea</collectingCountry>
(
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<bibRefCitation id="166F1286E37A25457B4A0D5598C0FA80" author="Berkeley, E. &amp; Berkeley, C." box="[1371,1428,1338,1365]" pageId="10" pageNumber="461" refId="ref19541" refString="Berkeley, E. &amp; Berkeley, C. (1952) Canadian Pacific Fauna: 9. Annelida, 9 b (2). Polychaeta Sedentaria, Volume 9. Canadian Fauna Series Fisheries Research Board Canada, 139 pp." type="book" year="1952">1952</bibRefCitation>
) suggested the presence of 
<taxonomicName id="B5FE14F4E37A25457FD40D309F1AFAAD" authorityName="Okuda" authorityYear="1937" box="[453,590,1375,1400]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="10" pageNumber="461" phylum="Annelida" rank="species" species="japonica">
<emphasis id="408AB365E37A25457FD40D309F1AFAAD" box="[453,590,1375,1400]" italics="true" pageId="10" pageNumber="461">M. japonica</emphasis>
</taxonomicName>
in the Canadian Pacific and off 
<collectingRegion id="B03AA195E37A25457DD50D309918FAAC" box="[964,1100,1375,1401]" country="United States of America" name="Washington" pageId="10" pageNumber="461">Washington</collectingRegion>
, 
<collectingCountry id="0AE92FE7E37A25457A480D3099C0FAAC" box="[1113,1172,1375,1401]" name="United States of America" pageId="10" pageNumber="461">USA</collectingCountry>
, however noted doubts of their identification suggesting 
<taxonomicName id="B5FE14F4E37A25457C020DEC9FEFFA48" authorityName="Johnson" authorityYear="1901" box="[531,699,1411,1437]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="10" pageNumber="461" phylum="Annelida" rank="species" species="longicornis">
<emphasis id="408AB365E37A25457C020DEC9FEFFA48" box="[531,699,1411,1437]" italics="true" pageId="10" pageNumber="461">M. longicornis</emphasis>
</taxonomicName>
as an alternative. 
<bibRefCitation id="166F1286E37A25457D9F0DEC994BFA48" author="Jones, M." box="[910,1055,1411,1437]" pageId="10" pageNumber="461" pagination="1445 - 1454" refId="ref21923" refString="Jones, M. (1971) Magelona berkeleyi n. sp. from Puget Sound (Annelida: Polychaeta), with a further redescription of Magelona longicornis Johnson and a consideration of recently described species of Magelona. Journal of the Fisheries Research Board of Canada, 28 (10), 1445 - 1454. https: // doi. org / 10.1139 / f 71 - 223" type="journal article" year="1971">Jones (1971)</bibRefCitation>
concurred with the authors, later synonymising the records with the latter species. The records of the species from the Indo-Pacific region (Andaman Islands, 
<collectingCountry id="0AE92FE7E37A25457EE20DA49C7BFA30" box="[243,303,1483,1509]" name="India" pageId="10" pageNumber="461">India</collectingCountry>
, and South 
<collectingCountry id="0AE92FE7E37A25457FBF0DA49F4EFA30" box="[430,538,1483,1509]" name="Vietnam" pageId="10" pageNumber="461">Viet Nam</collectingCountry>
) do not mention the distinct pigment band which is present in 
<emphasis id="408AB365E37A25457AD40DA49807FA31" box="[1221,1363,1483,1508]" italics="true" pageId="10" pageNumber="461">
<taxonomicName id="B5FE14F4E37A25457AD40DA4981BFA31" authorityName="Okuda" authorityYear="1937" box="[1221,1359,1483,1508]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="10" pageNumber="461" phylum="Annelida" rank="species" species="japonica">M. japonica</taxonomicName>
.
</emphasis>
Given the lack of such a distinctive character in the notes of both records, and their distance from the 
<typeStatus id="AD45D1D5E37A25457AA80D8099BDF9DC" box="[1209,1257,1519,1545]" pageId="10" pageNumber="461">type</typeStatus>
locality, further verification is warranted to ascertain whether 
<taxonomicName id="B5FE14F4E37A25457C800E7C9E43F9F9" authorityName="Okuda" authorityYear="1937" box="[657,791,1555,1580]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="10" pageNumber="461" phylum="Annelida" rank="species" species="japonica">
<emphasis id="408AB365E37A25457C800E7C9E43F9F9" box="[657,791,1555,1580]" italics="true" pageId="10" pageNumber="461">M. japonica</emphasis>
</taxonomicName>
really occurs in these regions. The authors suggest that 
<taxonomicName id="B5FE14F4E37A25457B6F0E7C9DADF985" authorityName="Okuda" authorityYear="1937" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="10" pageNumber="461" phylum="Annelida" rank="species" species="japonica">
<emphasis id="408AB365E37A25457B6F0E7C9DADF985" italics="true" pageId="10" pageNumber="461">M. japonica</emphasis>
</taxonomicName>
is predominantly a Temperate Northern Pacific (
<emphasis id="408AB365E37A25457D0F0E589E08F985" box="[798,860,1591,1616]" italics="true" pageId="10" pageNumber="461">sensu</emphasis>
<bibRefCitation id="166F1286E37A25457D720E589913F984" author="Spalding, M. D. &amp; Fox, H. E. &amp; Allen, G. R. &amp; Davidson, N. &amp; Ferdana, Z. A. &amp; Finlayson, M. &amp; Halpern, B. S. &amp; Jorge, M. A. &amp; Lombana, A. &amp; Lourie, S. A. &amp; Martin, K. D. &amp; McManus, E. &amp; Molnar, J. &amp; Recchia, C. &amp; Robertson, J." box="[867,1095,1591,1617]" pageId="10" pageNumber="461" pagination="573 - 583" refId="ref26095" refString="Spalding, M. D., Fox, H. E., Allen, G. R., Davidson, N., Ferdana, Z. A., Finlayson, M., Halpern, B. S., Jorge, M. A., Lombana, A., Lourie, S. A., Martin, K. D., McManus, E., Molnar, J., Recchia, C. &amp; Robertson, J. (2007) Marine Ecoregions of the World: A Bioregionalization of Coastal and Shelf Areas, BioScience, 57 (7), 573 - 583. https: // doi. org / 10.1641 / B 570707" type="journal article" year="2007">
Spalding 
<emphasis id="408AB365E37A25457DDF0E589952F984" box="[974,1030,1591,1617]" italics="true" pageId="10" pageNumber="461">et al.</emphasis>
2007
</bibRefCitation>
) species (
<figureCitation id="EAC573F2E37A25457AA40E5899AEF984" box="[1205,1274,1591,1617]" captionStart="FIGURE 9" captionStartId="15.[151,250,1032,1056]" captionTargetBox="[170,1416,181,1008]" captionTargetId="figure-19@15.[170,1416,181,1008]" captionTargetPageId="15" captionText="FIGURE 9. Known distribution records for Magelona japonica." figureDoi="http://doi.org/10.5281/zenodo.7235635" httpUri="https://zenodo.org/record/7235635/files/figure.png" pageId="10" pageNumber="461">Fig. 9</figureCitation>
).
</paragraph>
<paragraph id="72416F77E37A25457ED60E349F52F934" blockId="10.[151,1437,151,2013]" pageId="10" pageNumber="461">
Many of the above records suggest the species dominates at shallower depths, however, several occurrences at more than 
<quantity id="B506C292E37A25457F1C0E109C11F94C" box="[269,325,1663,1689]" metricMagnitude="1" metricUnit="m" metricValue="3.0" pageId="10" pageNumber="461" unit="m" value="30.0">30 m</quantity>
have been noted (
<bibRefCitation id="166F1286E37A25457C1C0E109F8DF94C" author="Choi, J. W. &amp; Koh, C. H." box="[525,729,1663,1689]" pageId="10" pageNumber="461" pagination="236 - 244" refId="ref19901" refString="Choi, J. W. &amp; Koh, C. H. (1986) The distribution and feeding characteristics of some dominant polychaetes in the continental shelf of the East Sea, Korea. Journal of the Korean Maritime Association, 21 (4), 236 - 244." type="journal article" year="1986">Choi &amp; Koh 1986</bibRefCitation>
; 
<bibRefCitation id="166F1286E37A25457CF50E109EC2F94C" author="Paik, S. &amp; Kang, R. &amp; Jeon, J. O. &amp; Lee, J. &amp; Yoon, S. G." box="[740,918,1663,1689]" pageId="10" pageNumber="461" pagination="123 - 134" refId="ref24984" refString="Paik, S., Kang, R., Jeon, J. O., Lee, J. &amp; Yoon, S. G. (2007) Distribution patterns of sandy bottom macrobenthic community on the Hupo Coastal Area, in the East Sea of Korea. Ocean and Polar Research, 29 (2), 123 - 134. https: // doi. org / 10.4217 / OPR. 2007.29.2.123" type="journal article" year="2007">
Paik 
<emphasis id="408AB365E37A25457D0A0E109E07F94C" box="[795,851,1663,1689]" italics="true" pageId="10" pageNumber="461">et al.</emphasis>
2007
</bibRefCitation>
). The species has been reported as dominant in sediments with low organic content (
<bibRefCitation id="166F1286E37A25457C3B0ECC9FA3F968" author="Lim, H. S. &amp; Hong, J. S." box="[554,759,1699,1725]" pageId="10" pageNumber="461" pagination="161 - 174" refId="ref22974" refString="Lim, H. S. &amp; Hong, J. S. (1997) Ecology of the macrozoobenthos in Chinhae Bay, Korea 2. Distribution pattern of the major dominant species. Korean Journal of Fisheries and Aquatic Sciences, 30 (2), 161 - 174." type="journal article" year="1997">Lim &amp; Hong 1997</bibRefCitation>
) and a sensitivity to organic enrichment was also additionally noted by 
<bibRefCitation id="166F1286E37A25457EEE0EA89F56F934" author="Nishijima, W. &amp; Umehara, A. &amp; Okuda, T. &amp; Nakai, S." box="[255,514,1734,1761]" pageId="10" pageNumber="461" pagination="90 - 98" refId="ref24502" refString="Nishijima, W., Umehara, A., Okuda, T. &amp; Nakai, S. (2015) Variations in macrobenthic community structures in relation to environmental variables in the Seto Inland Sea, Japan. Marine Pollution Bulletin, 92 (1 - 2), 90 - 98. https: // doi. org / 10.1016 / j. marpolbul. 2014.12.051" type="journal article" year="2015">
Nishijima 
<emphasis id="408AB365E37A25457F640EA89CF9F934" box="[373,429,1735,1761]" italics="true" pageId="10" pageNumber="461">et al.</emphasis>
(2015)
</bibRefCitation>
.
</paragraph>
</subSubSection>
<subSubSection id="3AE43CFCE37A25447ED60E8498D5F840" lastPageId="11" lastPageNumber="462" pageId="10" pageNumber="461" type="discussion">
<paragraph id="72416F77E37A25447ED60E8499D5FE78" blockId="10.[151,1437,151,2013]" lastBlockId="11.[151,1437,151,1941]" lastPageId="11" lastPageNumber="462" pageId="10" pageNumber="461">
<emphasis id="408AB365E37A25457ED60E849C6FF8D0" bold="true" box="[199,315,1771,1797]" pageId="10" pageNumber="461">Remarks.</emphasis>
The original description of 
<taxonomicName id="B5FE14F4E37A25457C610E849FA3F8D1" authorityName="Okuda" authorityYear="1937" box="[624,759,1771,1796]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="10" pageNumber="461" phylum="Annelida" rank="species" species="japonica">
<emphasis id="408AB365E37A25457C610E849FA3F8D1" box="[624,759,1771,1796]" italics="true" pageId="10" pageNumber="461">M. japonica</emphasis>
</taxonomicName>
does not disclose the holding institution of the type material, although does state that the specimens originally came from the Hokkaido Fishery Station. 
<bibRefCitation id="166F1286E37A25457AAB0F609805F8FC" author="Brasil, A. C. dos" box="[1210,1361,1807,1833]" pageId="10" pageNumber="461" refId="ref19686" refString="Brasil, A. C. dos S. (2003) Magelonidae Cunningham &amp; Ramage, 1888 (Annelida - Polychaeta) Phylogeny based on external morphology. [Doctoral dissertation, Federal University of Parana]" type="book" year="2003">
<collectingCountry id="0AE92FE7E37A25457AAB0F6099A9F8FC" box="[1210,1277,1807,1833]" name="Brazil" pageId="10" pageNumber="461">Brasil</collectingCountry>
(2003)
</bibRefCitation>
stated the 
<typeStatus id="AD45D1D5E37A25457ED30F5C9C70F898" box="[194,292,1843,1869]" pageId="10" pageNumber="461" type="holotype">holotype</typeStatus>
was originally deposited at the National Museum of Nature and Science, Tokyo (NSMT), however, reported the 
<typeStatus id="AD45D1D5E37A25457F370F389CDCF8A4" box="[294,392,1879,1905]" pageId="10" pageNumber="461" type="holotype">holotype</typeStatus>
to be lost. Discussions with NSMT, suggested the type material may have been deposited at the Hokkaido University Museum. Personal communications by the second author with Hiroshi Kajihara revealed putative 
<typeStatus id="AD45D1D5E37A25457EED0FF09C0AF86C" box="[252,350,1951,1977]" pageId="10" pageNumber="461" type="syntype">syntypes</typeStatus>
held at the latter institution. The specimen label noting “ 
<taxonomicName id="B5FE14F4E37A25457A130FF099B4F86D" authorityName="Okuda" authorityYear="1937" box="[1026,1248,1951,1977]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="10" pageNumber="461" phylum="Annelida" rank="species" species="japonica">
<emphasis id="408AB365E37A25457A130FF099B4F86D" box="[1026,1248,1951,1977]" italics="true" pageId="10" pageNumber="461">Magelona japonica</emphasis>
</taxonomicName>
”, “Okuda”, and “Incheon”, fitting well with the type material. Unfortunately, the material has dehydrated at some point, although, the condition is sufficient to corroborate Okuda’s observations and many of the identifying characteristics. Examination revealed several specimens which have been previously dissected (
<figureCitation id="EAC573F2E37B25447D8A08D49EA3FF00" box="[923,1015,187,213]" captionStart="FIGURE 8" captionStartId="14.[151,250,1874,1898]" captionTargetBox="[203,1383,181,1850]" captionTargetId="figure-27@14.[203,1383,181,1850]" captionTargetPageId="14" captionText="FIGURE 8. Magelona japonica (NMW.Z.2022.001.0001, A–B, stained with Methyl Green; C–G, putative syntypes ZIHU 2789). A, chaetigers 6–15, dorsal view; B, chaetigers 7–15, ventral view; C, potential syntype drawn by Okuda (1937a), lateral view; D, dissected anterior fragment, dorsal view; E, prostomium and thorax, dorsal view; F, prostomium and thorax, ventral view; G, posterior fragment, lateral view. Ab = abdomen, Ach = achaetous region, BO = burrowing organ, Pg = pygidium, PH = prostomial horns, Pp = palp, Pr = prostomium, Th = thorax, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235633" httpUri="https://zenodo.org/record/7235633/files/figure.png" pageId="11" pageNumber="462">Fig. 8D</figureCitation>
), possibly prior to drawing, and 
<specimenCount id="64F8A4FEE37B25447B6508D49C55FF2C" pageId="11" pageNumber="462" type="generic">one specimen</specimenCount>
bears close resemblance to that originally drawn by 
<bibRefCitation id="166F1286E37B25447D4108B09EA0FF2C" author="Okuda, S." box="[848,1012,223,249]" pageId="11" pageNumber="462" pagination="217 - 254" refId="ref24757" refString="Okuda, S. (1937 a) Spioniform polychaetes from Japan. Minutes of the Faculty of Science, Hokkaido Imperial University, 5 (3), 217 - 254." type="journal article" year="1937">Okuda (1937a</bibRefCitation>
: fig. 23) and herein imaged (
<figureCitation id="EAC573F2E37B25447B2608B098DBFF2C" box="[1335,1423,223,249]" captionStart="FIGURE 8" captionStartId="14.[151,250,1874,1898]" captionTargetBox="[203,1383,181,1850]" captionTargetId="figure-27@14.[203,1383,181,1850]" captionTargetPageId="14" captionText="FIGURE 8. Magelona japonica (NMW.Z.2022.001.0001, A–B, stained with Methyl Green; C–G, putative syntypes ZIHU 2789). A, chaetigers 6–15, dorsal view; B, chaetigers 7–15, ventral view; C, potential syntype drawn by Okuda (1937a), lateral view; D, dissected anterior fragment, dorsal view; E, prostomium and thorax, dorsal view; F, prostomium and thorax, ventral view; G, posterior fragment, lateral view. Ab = abdomen, Ach = achaetous region, BO = burrowing organ, Pg = pygidium, PH = prostomial horns, Pp = palp, Pr = prostomium, Th = thorax, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235633" httpUri="https://zenodo.org/record/7235633/files/figure.png" pageId="11" pageNumber="462">Fig. 8C</figureCitation>
). A posterior fragment devoid of anal cirri (
<figureCitation id="EAC573F2E37B25447C91096C9F8EFEC8" box="[640,730,259,285]" captionStart="FIGURE 8" captionStartId="14.[151,250,1874,1898]" captionTargetBox="[203,1383,181,1850]" captionTargetId="figure-27@14.[203,1383,181,1850]" captionTargetPageId="14" captionText="FIGURE 8. Magelona japonica (NMW.Z.2022.001.0001, A–B, stained with Methyl Green; C–G, putative syntypes ZIHU 2789). A, chaetigers 6–15, dorsal view; B, chaetigers 7–15, ventral view; C, potential syntype drawn by Okuda (1937a), lateral view; D, dissected anterior fragment, dorsal view; E, prostomium and thorax, dorsal view; F, prostomium and thorax, ventral view; G, posterior fragment, lateral view. Ab = abdomen, Ach = achaetous region, BO = burrowing organ, Pg = pygidium, PH = prostomial horns, Pp = palp, Pr = prostomium, Th = thorax, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235633" httpUri="https://zenodo.org/record/7235633/files/figure.png" pageId="11" pageNumber="462">Fig. 8G</figureCitation>
) as described by Okuda is additionally present. Whilst slight discrepancies in the sizes of specimens exist between the original description and the redescription herein, this is likely due to desiccation of the 
<typeStatus id="AD45D1D5E37B25447C1209249F0EFEB0" box="[515,602,331,357]" pageId="11" pageNumber="462" type="syntype">syntype</typeStatus>
material. Okuda’s longest specimen was 42 chaetigers, and although the 
<typeStatus id="AD45D1D5E37B25447E8609009DADFE5C" box="[151,249,367,393]" pageId="11" pageNumber="462" type="syntype">syntypes</typeStatus>
are marginally shorter, this may be due to dissection, or fragmentation. The current authors are content that the Hokkaido University Museum material represents the 
<typeStatus id="AD45D1D5E37B25447D3009FC9E2CFE78" box="[801,888,403,429]" pageId="11" pageNumber="462" type="syntype">syntype</typeStatus>
material of the species.
</paragraph>
<paragraph id="72416F77E37B25447EE609D89E2CFD24" blockId="11.[151,1437,151,1941]" pageId="11" pageNumber="462">
There are several differences noted between the original description and the redescription given herein, particularly in relation to the parapodia. The original description notes “the eight anterior chaetigers bear slender dorsal and ventral postchaetal lobes”, however, the figures show distinctly ventral neuropodia for the first and fifth parapodia, which is in agreement with the current findings, in which they only become postchaetal at chaetigers 7 to 9. 
<bibRefCitation id="166F1286E37B25447EC10A289C2DFDB4" author="Okuda, S." box="[208,377,583,609]" pageId="11" pageNumber="462" pagination="217 - 254" refId="ref24757" refString="Okuda, S. (1937 a) Spioniform polychaetes from Japan. Minutes of the Faculty of Science, Hokkaido Imperial University, 5 (3), 217 - 254." type="journal article" year="1937">Okuda (1937a)</bibRefCitation>
made no mention of scoop-shaped thoracic neuropodia; however, they can be observed on the 
<typeStatus id="AD45D1D5E37B25447E860A049DBAFD50" box="[151,238,619,645]" pageId="11" pageNumber="462" type="syntype">syntype</typeStatus>
material, even in their dried state (
<figureCitation id="EAC573F2E37B25447C630A049FBEFD50" box="[626,746,619,645]" captionStart="FIGURE 8" captionStartId="14.[151,250,1874,1898]" captionTargetBox="[203,1383,181,1850]" captionTargetId="figure-27@14.[203,1383,181,1850]" captionTargetPageId="14" captionText="FIGURE 8. Magelona japonica (NMW.Z.2022.001.0001, A–B, stained with Methyl Green; C–G, putative syntypes ZIHU 2789). A, chaetigers 6–15, dorsal view; B, chaetigers 7–15, ventral view; C, potential syntype drawn by Okuda (1937a), lateral view; D, dissected anterior fragment, dorsal view; E, prostomium and thorax, dorsal view; F, prostomium and thorax, ventral view; G, posterior fragment, lateral view. Ab = abdomen, Ach = achaetous region, BO = burrowing organ, Pg = pygidium, PH = prostomial horns, Pp = palp, Pr = prostomium, Th = thorax, numbers indicate chaetiger." figureDoi="http://doi.org/10.5281/zenodo.7235633" httpUri="https://zenodo.org/record/7235633/files/figure.png" pageId="11" pageNumber="462">Fig. 8C–E</figureCitation>
). Okuda also noted the lamellae of chaetiger 9 to be subequal, however, they are relatively similar in length in both rami, as he originally drew. The pigment bands of the type specimens have now faded to a large extent, but this is consistent with that seen in other magelonid specimens after more than ten years in preservatives (pers. obs. of second author).
</paragraph>
<paragraph id="72416F77E37B25447ED60A949C5DFC70" blockId="11.[151,1437,151,1941]" pageId="11" pageNumber="462">
Okuda noted scattered brown spots on the lateral sides of the thorax, just behind the parapodia. Although not observed by the current authors, white spots scattered over the thorax can be seen. Six to eight abdominal hooded hooks per rami were described by Okuda, although there are approximately ten for the Japanese specimen. On examination of one of Okuda’s 
<typeStatus id="AD45D1D5E37B25447C290B089FCEFC54" box="[568,666,871,897]" pageId="11" pageNumber="462" type="syntype">syntypes</typeStatus>
eight hooks were seen per ramus, not dissimilar from the current specimen.
</paragraph>
<paragraph id="72416F77E37B25447ED60BC099A4FB74" blockId="11.[151,1437,151,1941]" pageId="11" pageNumber="462">
The subspecies 
<taxonomicName id="B5FE14F4E37B25447F640BC09E26FC1C" authority="Okuda, 1937" authorityName="Okuda" authorityYear="1937" box="[373,882,943,969]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="variety" species="japonica" variety="koreana">
<emphasis id="408AB365E37B25447F640BC09F1AFC1D" box="[373,590,943,969]" italics="true" pageId="11" pageNumber="462">Magelona japonica</emphasis>
var. 
<emphasis id="408AB365E37B25447C930BC09F89FC1C" box="[642,733,943,969]" italics="true" pageId="11" pageNumber="462">koreana</emphasis>
Okuda, 1937
</taxonomicName>
was elevated to species level (
<taxonomicName id="B5FE14F4E37B25447AD00BC098C7FC1C" authorityName="Okuda" authorityYear="1937" box="[1217,1427,943,969]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="koreana">
<emphasis id="408AB365E37B25447AD00BC098C7FC1C" box="[1217,1427,943,969]" italics="true" pageId="11" pageNumber="462">Magelona koreana</emphasis>
</taxonomicName>
) by Jones in 1971. However, it has been largely ignored in the literature outside of a few sporadic records (e.g., 
<bibRefCitation id="166F1286E37B25447E860B989C6FFBC4" author="Gallardo, V." box="[151,315,1015,1041]" pageId="11" pageNumber="462" pagination="101" refId="ref20710" refString="Gallardo, V. (1968) Polychaeta from the Bay of Nha Trang, South Viet Nam. Scripps Institution Oceanography, University California. NAGA Expedition Report, 4 (3), 101." type="journal article" year="1968">Gallardo 1968</bibRefCitation>
; 
<bibRefCitation id="166F1286E37B25447F560B989F4DFBC4" author="Glasby, C. J. &amp; Lee, Y. L. &amp; Hsueh, P. W." box="[327,537,1015,1041]" pageId="11" pageNumber="462" pagination="178 - 234" refId="ref20747" refString="Glasby, C. J., Lee, Y. L. &amp; Hsueh, P. W. (2016) Marine Annelida (excluding clitellates and siboglinids) from the South China Sea. Raffles Bulletin of Zoology, 34, 178 - 234." type="journal article" year="2016">
Glasby 
<emphasis id="408AB365E37B25447F8C0B989C81FBC4" box="[413,469,1015,1041]" italics="true" pageId="11" pageNumber="462">et al.</emphasis>
2016
</bibRefCitation>
). The two species share many morphological similarities, but 
<taxonomicName id="B5FE14F4E37B25447ADC0B989819FBC4" authorityName="Okuda" authorityYear="1937" box="[1229,1357,1015,1041]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="koreana">
<emphasis id="408AB365E37B25447ADC0B989819FBC4" box="[1229,1357,1015,1041]" italics="true" pageId="11" pageNumber="462">M. koreana</emphasis>
</taxonomicName>
differs in possessing small ventral lamellae on chaetiger 9, and sub-equal abdominal lamellae. The original description of 
<taxonomicName id="B5FE14F4E37B25447EA80C509C6AFB8C" authorityName="Okuda" authorityYear="1937" box="[185,318,1087,1113]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="koreana">
<emphasis id="408AB365E37B25447EA80C509C6AFB8C" box="[185,318,1087,1113]" italics="true" pageId="11" pageNumber="462">M. koreana</emphasis>
</taxonomicName>
is ambiguous in terms of pigmentation, stating “no marked pigmentation”, this requires further verification. It is entirely possible that some records of 
<taxonomicName id="B5FE14F4E37B25447D1F0C0C9EC3FBA9" authorityName="Okuda" authorityYear="1937" box="[782,919,1123,1148]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="japonica">
<emphasis id="408AB365E37B25447D1F0C0C9EC3FBA9" box="[782,919,1123,1148]" italics="true" pageId="11" pageNumber="462">M. japonica</emphasis>
</taxonomicName>
may actually represent 
<emphasis id="408AB365E37B25447AB90C0C9865FBA8" box="[1192,1329,1123,1149]" italics="true" pageId="11" pageNumber="462">
<taxonomicName id="B5FE14F4E37B25447AB90C0C9879FBA8" authorityName="Okuda" authorityYear="1937" box="[1192,1325,1123,1149]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="koreana">M. koreana</taxonomicName>
.
</emphasis>
The 
<typeStatus id="AD45D1D5E37B25447B7D0C0C98C8FBA8" box="[1388,1436,1123,1149]" pageId="11" pageNumber="462">type</typeStatus>
material of 
<taxonomicName id="B5FE14F4E37B25447F090CE89CB8FB74" authorityName="Okuda" authorityYear="1937" box="[280,492,1159,1185]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="koreana">
<emphasis id="408AB365E37B25447F090CE89CB8FB74" box="[280,492,1159,1185]" italics="true" pageId="11" pageNumber="462">Magelona koreana</emphasis>
</taxonomicName>
is believed lost and no further information can be added at this time.
</paragraph>
<paragraph id="72416F77E37B25447ED60CC49CB8FA30" blockId="11.[151,1437,151,1941]" pageId="11" pageNumber="462">
In their phylogenetic hypotheses under 
<taxonomicName id="B5FE14F4E37B25447C980CC49963FB10" authority=", Mortimer et al. (2021 a)" authorityName="Mortimer" authorityYear="2021" box="[649,1079,1195,1221]" class="Polychaeta" family="Magelonidae" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="family">
Magelonidae, 
<bibRefCitation id="166F1286E37B25447D3B0CC49963FB10" author="Mortimer, K. &amp; Fitzhugh, K. &amp; dos Brasil, A. C. &amp; Lana, P." box="[810,1079,1195,1221]" pageId="11" pageNumber="462" pagination="11993" refId="ref23820" refString="Mortimer, K., Fitzhugh, K., dos Brasil, A. C. &amp; Lana, P. (2021 a) Who's who in Magelona: phylogenetic hypotheses under Magelonidae Cunningham &amp; Ramage, 1888 (Annelida: Polychaeta). PeerJ, 9, 11993. https: // doi. org / 10.7717 / peerj. 11993" type="journal article" year="2021">
Mortimer 
<emphasis id="408AB365E37B25447D8F0CC49E8CFB10" box="[926,984,1195,1221]" italics="true" pageId="11" pageNumber="462">et al.</emphasis>
(2021a)
</bibRefCitation>
</taxonomicName>
highlighted a group containing the species 
<taxonomicName id="B5FE14F4E37B25447F0C0CA09EEBFB3C" authority="Mortimer, Kongsrud &amp; Willassen, 2021" authorityName="Mortimer, Kongsrud &amp; Willassen" authorityYear="2021" box="[285,959,1231,1257]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="fasciata">
<emphasis id="408AB365E37B25447F0C0CA09CA4FB3C" box="[285,496,1231,1257]" italics="true" pageId="11" pageNumber="462">Magelona fasciata</emphasis>
<bibRefCitation id="166F1286E37B25447FE80CA09EEBFB3C" author="Mortimer, K. &amp; Kongsrud, J. &amp; Willassen, E." box="[505,959,1231,1257]" pageId="11" pageNumber="462" pagination="1 - 43" refId="ref23959" refString="Mortimer, K., Kongsrud, J. &amp; Willassen, E. (2021 b) Integrative taxonomy of West African Magelona (Annelida: Magelonidae): species with thoracic pigmentation. Zoological Journal of the Linnean Society, 20, 1 - 43. https: // doi. org / 10.1093 / zoolinnean / zlab 070" type="journal article" year="2021">Mortimer, Kongsrud &amp; Willassen, 2021</bibRefCitation>
</taxonomicName>
and 
<taxonomicName id="B5FE14F4E37B25447DEB0CA09931FB3D" authorityName="Ehlers" authorityYear="1908" box="[1018,1125,1231,1256]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="cincta">
<emphasis id="408AB365E37B25447DEB0CA09931FB3D" box="[1018,1125,1231,1256]" italics="true" pageId="11" pageNumber="462">M. cincta</emphasis>
</taxonomicName>
. The group (Group F) was characterised by the presence of scoop-shaped thoracic neuropodial lamellae, and a pigmented band in the thorax. 
<taxonomicName id="B5FE14F4E37B25447E860D789C24FAE5" authorityName="Okuda" authorityYear="1937" box="[151,368,1303,1329]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="japonica">
<emphasis id="408AB365E37B25447E860D789C24FAE5" box="[151,368,1303,1329]" italics="true" pageId="11" pageNumber="462">Magelona japonica</emphasis>
</taxonomicName>
was not included in that analysis, but it is highly likely to belong to this ‘ 
<taxonomicName id="B5FE14F4E37B25447A830D78981AFAE5" authorityName="Ehlers" authorityYear="1908" box="[1170,1358,1303,1329]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="cincta">
<emphasis id="408AB365E37B25447A830D78981AFAE5" box="[1170,1358,1303,1329]" italics="true" pageId="11" pageNumber="462">Magelona cincta</emphasis>
</taxonomicName>
’ group of species. 
<taxonomicName id="B5FE14F4E37B25447F0A0D549CA4FA80" authorityName="Mortimer, Kongsrud &amp; Willassen" authorityYear="2021" box="[283,496,1339,1365]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="fasciata">
<emphasis id="408AB365E37B25447F0A0D549CA4FA80" box="[283,496,1339,1365]" italics="true" pageId="11" pageNumber="462">Magelona fasciata</emphasis>
</taxonomicName>
, a species described off Western African, differs from 
<taxonomicName id="B5FE14F4E37B25447A610D5499AEFA81" authorityName="Okuda" authorityYear="1937" box="[1136,1274,1339,1364]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="japonica">
<emphasis id="408AB365E37B25447A610D5499AEFA81" box="[1136,1274,1339,1364]" italics="true" pageId="11" pageNumber="462">M. japonica</emphasis>
</taxonomicName>
in possessing bidentate, not tridentate, hooded hooks as in the latter species. The prostomial horns of 
<taxonomicName id="B5FE14F4E37B25447A730D30998BFAAC" authorityName="Mortimer, Kongsrud &amp; Willassen" authorityYear="2021" box="[1122,1247,1375,1401]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="fasciata">
<emphasis id="408AB365E37B25447A730D30998BFAAC" box="[1122,1247,1375,1401]" italics="true" pageId="11" pageNumber="462">M. fasciata</emphasis>
</taxonomicName>
are rudimentary, and pigmentation runs throughout the entire body, whilst in 
<taxonomicName id="B5FE14F4E37B25447D7A0DEC9EACFA49" authorityName="Okuda" authorityYear="1937" box="[875,1016,1411,1436]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="japonica">
<emphasis id="408AB365E37B25447D7A0DEC9EACFA49" box="[875,1016,1411,1436]" italics="true" pageId="11" pageNumber="462">M. japonica</emphasis>
</taxonomicName>
prostomial horns are more distinct and pigmentation is limited to the posterior thorax. Similarly, 
<taxonomicName id="B5FE14F4E37B25447D760DC89E87FA15" authorityName="Ehlers" authorityYear="1908" box="[871,979,1447,1472]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="cincta">
<emphasis id="408AB365E37B25447D760DC89E87FA15" box="[871,979,1447,1472]" italics="true" pageId="11" pageNumber="462">M. cincta</emphasis>
</taxonomicName>
differs from 
<taxonomicName id="B5FE14F4E37B25447A610DC899AFFA15" authorityName="Okuda" authorityYear="1937" box="[1136,1275,1447,1472]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="japonica">
<emphasis id="408AB365E37B25447A610DC899AFFA15" box="[1136,1275,1447,1472]" italics="true" pageId="11" pageNumber="462">M. japonica</emphasis>
</taxonomicName>
in possessing rudimentary prostomial horns.
</paragraph>
<paragraph id="72416F77E37B25447ED60D809C91F8D0" blockId="11.[151,1437,151,1941]" pageId="11" pageNumber="462">
A further eight species are recorded to possess a thoracic pigment band: 
<taxonomicName id="B5FE14F4E37B25447A070D80992AF9DC" authorityName="Wilson" authorityYear="1958" box="[1046,1150,1519,1545]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="alleni">
<emphasis id="408AB365E37B25447A070D80992AF9DC" box="[1046,1150,1519,1545]" italics="true" pageId="11" pageNumber="462">M. alleni</emphasis>
</taxonomicName>
; 
<taxonomicName id="B5FE14F4E37B25447A810D809C1FF9F8" authority="Harmelin, 1964" authorityName="Harmelin" authorityYear="1964" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="equilamellae">
<emphasis id="408AB365E37B25447A810D8098C9F9DC" box="[1168,1437,1519,1545]" italics="true" pageId="11" pageNumber="462">Magelona equilamellae</emphasis>
<bibRefCitation id="166F1286E37B25447E860E7C9C1FF9F8" author="Harmelin, J. G." box="[151,331,1555,1581]" pageId="11" pageNumber="462" pagination="43 - 105" refId="ref20833" refString="Harmelin, J. G. (1964) Etude de l'endofaune des &quot; mattes &quot; d'herbiers de Posidonia oceanica Delile. Recueil des Travaux de la Station Marine d'Endoume, 35 (51), 43 - 105." type="journal article" year="1964">Harmelin, 1964</bibRefCitation>
</taxonomicName>
; 
<taxonomicName id="B5FE14F4E37B25447F490E7C9F50F9F8" box="[344,516,1555,1581]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="undefined-i">
<emphasis id="408AB365E37B25447F490E7C9C9EF9F8" box="[344,458,1555,1581]" italics="true" pageId="11" pageNumber="462">Magelona</emphasis>
sp. I
</taxonomicName>
of 
<bibRefCitation id="166F1286E37B25447C3D0E7C9E32F9F8" author="Uebelacker, J. M. &amp; Jones, M. L." box="[556,870,1555,1581]" pageId="11" pageNumber="462" refId="ref26463" refString="Uebelacker, J. M. &amp; Jones, M. L. (1984) Family Magelonidae. In: Uebelacker, J. M. &amp; Johnson, P. G. (Eds.), Taxonomic guide to the polychaetes of the northern Gulf of Mexico, 7.1 - 7.29. Final report to the Minerals Management Service, contract 14 - 12 - 001 - 29091. Barry A. Vittor and Associates, Mobile, Alabama." type="book" year="1984">Uebelacker &amp; Jones (1984)</bibRefCitation>
; 
<taxonomicName id="B5FE14F4E37B25447D620E7C98C3F9F8" authority="Bolivar &amp; Lana, 1986" authorityName="Bolivar &amp; Lana" authorityYear="1986" box="[883,1431,1555,1581]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="variolamellata">
<emphasis id="408AB365E37B25447D620E7C99C6F9F8" box="[883,1170,1555,1581]" italics="true" pageId="11" pageNumber="462">Magelona variolamellata</emphasis>
<bibRefCitation id="166F1286E37B25447A8A0E7C98C3F9F8" author="Bolivar, G. &amp; Lana, P. da" box="[1179,1431,1555,1581]" pageId="11" pageNumber="462" pagination="131 - 147" refId="ref19633" refString="Bolivar, G. &amp; Lana, P. da C. (1986) Magelonidae (Annelida, Polychaeta) do litoral sudeste do Brasil. Neritica, 1 (3), 131 - 147. https: // doi. org / 10.5380 / rn. v 1 i 3.41200" type="journal article" year="1986">Bolívar &amp; Lana, 1986</bibRefCitation>
</taxonomicName>
; 
<taxonomicName id="B5FE14F4E37B25447E860E589E00F984" authority="Mortimer, Kongsrud &amp; Willassen, 2021" authorityName="Mortimer, Kongsrud &amp; Willassen" authorityYear="2021" box="[151,852,1591,1617]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="guineensis">
<emphasis id="408AB365E37B25447E860E589CD3F985" box="[151,391,1591,1617]" italics="true" pageId="11" pageNumber="462">Magelona guineensis</emphasis>
<bibRefCitation id="166F1286E37B25447F9E0E589E00F984" author="Mortimer, K. &amp; Kongsrud, J. &amp; Willassen, E." box="[399,852,1591,1617]" pageId="11" pageNumber="462" pagination="1 - 43" refId="ref23959" refString="Mortimer, K., Kongsrud, J. &amp; Willassen, E. (2021 b) Integrative taxonomy of West African Magelona (Annelida: Magelonidae): species with thoracic pigmentation. Zoological Journal of the Linnean Society, 20, 1 - 43. https: // doi. org / 10.1093 / zoolinnean / zlab 070" type="journal article" year="2021">Mortimer, Kongsrud &amp; Willassen, 2021</bibRefCitation>
</taxonomicName>
; 
<taxonomicName id="B5FE14F4E37B25447D700E589D86F9A0" authority="Mortimer, Kongsrud &amp; Willassen, 2021" authorityName="Mortimer, Kongsrud &amp; Willassen" authorityYear="2021" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="picta">
<emphasis id="408AB365E37B25447D700E589946F985" box="[865,1042,1591,1617]" italics="true" pageId="11" pageNumber="462">Magelona picta</emphasis>
<bibRefCitation id="166F1286E37B25447A0A0E589D86F9A0" author="Mortimer, K. &amp; Kongsrud, J. &amp; Willassen, E." pageId="11" pageNumber="462" pagination="1 - 43" refId="ref23959" refString="Mortimer, K., Kongsrud, J. &amp; Willassen, E. (2021 b) Integrative taxonomy of West African Magelona (Annelida: Magelonidae): species with thoracic pigmentation. Zoological Journal of the Linnean Society, 20, 1 - 43. https: // doi. org / 10.1093 / zoolinnean / zlab 070" type="journal article" year="2021">Mortimer, Kongsrud &amp; Willassen, 2021</bibRefCitation>
</taxonomicName>
; 
<taxonomicName id="B5FE14F4E37B25447ECE0E349E2BF9A0" authority="Mortimer, Kongsrud &amp; Willassen, 2021" authorityName="Mortimer, Kongsrud &amp; Willassen" authorityYear="2021" box="[223,895,1627,1653]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="nanseni">
<emphasis id="408AB365E37B25447ECE0E349CE4F9A1" box="[223,432,1627,1653]" italics="true" pageId="11" pageNumber="462">Magelona nanseni</emphasis>
<bibRefCitation id="166F1286E37B25447FA80E349E2BF9A0" author="Mortimer, K. &amp; Kongsrud, J. &amp; Willassen, E." box="[441,895,1627,1653]" pageId="11" pageNumber="462" pagination="1 - 43" refId="ref23959" refString="Mortimer, K., Kongsrud, J. &amp; Willassen, E. (2021 b) Integrative taxonomy of West African Magelona (Annelida: Magelonidae): species with thoracic pigmentation. Zoological Journal of the Linnean Society, 20, 1 - 43. https: // doi. org / 10.1093 / zoolinnean / zlab 070" type="journal article" year="2021">Mortimer, Kongsrud &amp; Willassen, 2021</bibRefCitation>
</taxonomicName>
; and 
<taxonomicName id="B5FE14F4E37B25447DAC0E349C1BF94C" authority="Mortimer, Kongsrud &amp; Willassen, 2021" authorityName="Mortimer, Kongsrud &amp; Willassen" authorityYear="2021" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="mackiei">
<emphasis id="408AB365E37B25447DAC0E3499DAF9A0" box="[957,1166,1627,1653]" italics="true" pageId="11" pageNumber="462">Magelona mackiei</emphasis>
<bibRefCitation id="166F1286E37B25447A870E349C1BF94C" author="Mortimer, K. &amp; Kongsrud, J. &amp; Willassen, E." pageId="11" pageNumber="462" pagination="1 - 43" refId="ref23959" refString="Mortimer, K., Kongsrud, J. &amp; Willassen, E. (2021 b) Integrative taxonomy of West African Magelona (Annelida: Magelonidae): species with thoracic pigmentation. Zoological Journal of the Linnean Society, 20, 1 - 43. https: // doi. org / 10.1093 / zoolinnean / zlab 070" type="journal article" year="2021">Mortimer, Kongsrud &amp; Willassen, 2021</bibRefCitation>
</taxonomicName>
. They all differ from 
<taxonomicName id="B5FE14F4E37B25447C560E109F84F94D" authorityName="Okuda" authorityYear="1937" box="[583,720,1663,1688]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="japonica">
<emphasis id="408AB365E37B25447C560E109F84F94D" box="[583,720,1663,1688]" italics="true" pageId="11" pageNumber="462">M. japonica</emphasis>
</taxonomicName>
in not possessing scoop-shaped neuropodial thoracic lamellae, and in lacking distinct prostomial horns. 
<taxonomicName id="B5FE14F4E37B25447C480ECC9E44F968" authorityName="Wilson" authorityYear="1958" box="[601,784,1699,1725]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="alleni">
<emphasis id="408AB365E37B25447C480ECC9E44F968" box="[601,784,1699,1725]" italics="true" pageId="11" pageNumber="462">Magelona alleni</emphasis>
</taxonomicName>
further differs in possessing sub-equal abdominal lamellae (as seen in 
<taxonomicName id="B5FE14F4E37B25447F040EA89CC1F934" authorityName="Okuda" authorityYear="1937" box="[277,405,1735,1761]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="koreana">
<emphasis id="408AB365E37B25447F040EA89CC1F934" box="[277,405,1735,1761]" italics="true" pageId="11" pageNumber="462">M. koreana</emphasis>
</taxonomicName>
), 
<taxonomicName id="B5FE14F4E37B25447FBD0EA89F7DF934" authorityName="Mortimer, Kongsrud &amp; Willassen" authorityYear="2021" box="[428,553,1735,1761]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="mackiei">
<emphasis id="408AB365E37B25447FBD0EA89F7DF934" box="[428,553,1735,1761]" italics="true" pageId="11" pageNumber="462">M. mackiei</emphasis>
</taxonomicName>
in possessing bidentate hooded hooks, and lastly 
<taxonomicName id="B5FE14F4E37B25447A460EA89854F934" box="[1111,1280,1735,1761]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="undefined-i">
<emphasis id="408AB365E37B25447A460EA8999DF934" box="[1111,1225,1735,1761]" italics="true" pageId="11" pageNumber="462">Magelona</emphasis>
sp. I
</taxonomicName>
in possessing polydentate hooded hooks.
</paragraph>
<paragraph id="72416F77E37B25447ED60F6098D5F840" blockId="11.[151,1437,151,1941]" pageId="11" pageNumber="462">
Two morphologically similar species known from an adjacent ecoregion are 
<taxonomicName id="B5FE14F4E37B25447A1C0F609C3FF898" authority="Nateewathana &amp; Hylleberg, 1991" authorityName="Nateewathana &amp; Hylleberg" authorityYear="1991" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="mickminni">
<emphasis id="408AB365E37B25447A1C0F6099ADF8FC" box="[1037,1273,1807,1833]" italics="true" pageId="11" pageNumber="462">Magelona mickminni</emphasis>
<bibRefCitation id="166F1286E37B25447AEF0F609C3FF898" author="Nateewathana, A. &amp; Hylleberg, J." pageId="11" pageNumber="462" pagination="169 - 184" refId="ref24456" refString="Nateewathana, A. &amp; Hylleberg, J. (1991) Magelonid polychaetes from Thailand, the Andaman Sea, with descriptions of eight new species. Ophelia (Systematics, Biology and Morphology of World Polychaeta), 5, 169 - 184." type="journal article" year="1991">Nateewathana &amp; Hylleberg, 1991</bibRefCitation>
</taxonomicName>
, and 
<taxonomicName id="B5FE14F4E37B25447FB70F5C994CF898" authority="Nateewathana &amp; Hylleberg, 1991" authorityName="Nateewathana &amp; Hylleberg" authorityYear="1991" box="[422,1048,1843,1869]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="petersenae">
<emphasis id="408AB365E37B25447FB70F5C9FC3F899" box="[422,663,1843,1869]" italics="true" pageId="11" pageNumber="462">Magelona petersenae</emphasis>
<bibRefCitation id="166F1286E37B25447C8F0F5C994CF898" author="Nateewathana, A. &amp; Hylleberg, J." box="[670,1048,1843,1869]" pageId="11" pageNumber="462" pagination="169 - 184" refId="ref24456" refString="Nateewathana, A. &amp; Hylleberg, J. (1991) Magelonid polychaetes from Thailand, the Andaman Sea, with descriptions of eight new species. Ophelia (Systematics, Biology and Morphology of World Polychaeta), 5, 169 - 184." type="journal article" year="1991">Nateewathana &amp; Hylleberg, 1991</bibRefCitation>
</taxonomicName>
. 
<taxonomicName id="B5FE14F4E37B25447A320F5C9844F898" authorityName="Nateewathana &amp; Hylleberg" authorityYear="1991" box="[1059,1296,1843,1869]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="mickminni">
<emphasis id="408AB365E37B25447A320F5C9844F898" box="[1059,1296,1843,1869]" italics="true" pageId="11" pageNumber="462">Magelona mickminni</emphasis>
</taxonomicName>
differs from 
<taxonomicName id="B5FE14F4E37B25447E860F389C4BF8A5" authorityName="Okuda" authorityYear="1937" box="[151,287,1879,1904]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="japonica">
<emphasis id="408AB365E37B25447E860F389C4BF8A5" box="[151,287,1879,1904]" italics="true" pageId="11" pageNumber="462">M. japonica</emphasis>
</taxonomicName>
in lacking scoop-shaped lamellae. Whilst 
<taxonomicName id="B5FE14F4E37B25447CEE0F389ECBF8A5" authorityName="Nateewathana &amp; Hylleberg" authorityYear="1991" box="[767,927,1879,1904]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="petersenae">
<emphasis id="408AB365E37B25447CEE0F389ECBF8A5" box="[767,927,1879,1904]" italics="true" pageId="11" pageNumber="462">M. petersenae</emphasis>
</taxonomicName>
shares many morphological similarities with 
<taxonomicName id="B5FE14F4E37B25447E860F149C4BF841" authorityName="Okuda" authorityYear="1937" box="[151,287,1915,1940]" class="Polychaeta" family="Magelonidae" genus="Magelona" kingdom="Animalia" pageId="11" pageNumber="462" phylum="Annelida" rank="species" species="japonica">
<emphasis id="408AB365E37B25447E860F149C4BF841" box="[151,287,1915,1940]" italics="true" pageId="11" pageNumber="462">M. japonica</emphasis>
</taxonomicName>
the thoracic lamellae are slightly less scoop-shaped and the prostomium frontal margin is crenulate.
</paragraph>
</subSubSection>
</treatment>
</document>