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<document id="045B79EE592E1532051E5ACA907C30FF" ID-CLB-Dataset="301952" ID-DOI="10.11646/zootaxa.5496.2.8" ID-GBIF-Dataset="a457292d-f932-412a-a3ed-62b824aa7327" ID-ISSN="1175-5326" ID-Zenodo-Dep="13346707" ID-ZooBank="1BF43637-4B8C-4E1C-B8DD-3BE03E70ADAC" IM.bibliography_approvedBy="tatiana" IM.illustrations_approvedBy="tatiana" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="GgImagineBatch,operationResults" IM.taxonomicNames_approvedBy="felipe" IM.treatments_approvedBy="tatiana" checkinTime="1724133129957" checkinUser="plazi" docAuthor="Magalhães, Wagner F., Lavesque, Nicolas &amp; Lamarque, Bastien" docDate="2024" docId="262FD17CFFEBFFA154FFFE70E9AFF051" docLanguage="en" docName="zootaxa.5496.2.8.pdf" docOrigin="Zootaxa 5496 (2)" docSource="http://dx.doi.org/10.11646/zootaxa.5496.2.8" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Mediomastus biscayensis Magalhães, Lavesque &amp; Lamarque, 2024, sp. nov." docType="treatment" docVersion="3" lastPageNumber="276" masterDocId="DA16A904FFE9FFA25468FFC6EB5EF14C" masterDocTitle="Three new species of Capitellidae (Annelida) from France" masterLastPageNumber="289" masterPageNumber="273" pageNumber="275" updateTime="1725274377308" updateUser="ExternalLinkService" zenodo-license-document="CLOSED">
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<mods:title id="2A9A07BF468846525F36686EECB6ACC8">Three new species of Capitellidae (Annelida) from France</mods:title>
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<mods:namePart id="B3BC7E254F95DDA903E1E883990F50DA">Magalhães, Wagner F.</mods:namePart>
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<mods:affiliation id="554E532021D2FFE4FEB9A5DE5B207E0D">Institute of Biology, Federal University of Bahia, Salvador, Brazil.</mods:affiliation>
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<mods:namePart id="94F5B2C3FD34AFF1A4924C3204467AC4">Lavesque, Nicolas</mods:namePart>
<mods:affiliation id="9D006D2CD442F4E4AB09A6AC3E170DE5">Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, F- 33120 Arcachon, France.</mods:affiliation>
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<mods:namePart id="86327950CBDEC9CD67E250E233596A55">Lamarque, Bastien</mods:namePart>
<mods:affiliation id="743FE33387C4AFC6AB961CEE29E55C06">Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, F- 33120 Arcachon, France.</mods:affiliation>
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<mods:title id="EFE47143B641AF4A21E52E5A97B9F65A">Zootaxa</mods:title>
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<mods:date id="EF4E2F205B1CC7F07F2DBF21B7B9F16E">2024</mods:date>
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<treatment id="262FD17CFFEBFFA154FFFE70E9AFF051" ID-DOI="http://doi.org/10.5281/zenodo.13627225" ID-GBIF-Taxon="240028313" ID-Zenodo-Dep="13627225" LSID="urn:lsid:plazi:treatment:262FD17CFFEBFFA154FFFE70E9AFF051" httpUri="http://treatment.plazi.org/id/262FD17CFFEBFFA154FFFE70E9AFF051" lastPageId="3" lastPageNumber="276" pageId="2" pageNumber="275">
<subSubSection id="E69C33E1FFEBFFA054FFFE70E972F09D" box="[151,556,438,465]" pageId="2" pageNumber="275" type="nomenclature">
<paragraph id="AE39606AFFEBFFA054FFFE70E972F09D" blockId="2.[151,556,438,501]" box="[151,556,438,465]" pageId="2" pageNumber="275">
<heading id="F571D706FFEBFFA054FFFE70E972F09D" bold="true" box="[151,556,438,465]" fontSize="11" level="1" pageId="2" pageNumber="275" reason="1">
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<taxonomicName id="69861BE9FFEBFFA054FFFE70EA99F09D" authorityName="Magalhães &amp; Lavesque &amp; Lamarque" authorityYear="2024" box="[151,455,438,465]" class="Polychaeta" family="Capitellidae" genus="Mediomastus" kingdom="Animalia" pageId="2" pageNumber="275" phylum="Annelida" rank="species" species="biscayensis" status="sp. nov.">
<emphasis id="9CF2BC78FFEBFFA054FFFE70EA99F09D" bold="true" box="[151,455,438,465]" italics="true" pageId="2" pageNumber="275">Mediomastus biscayensis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="87C10103FFEBFFA055A6FE71E972F09D" box="[462,556,439,465]" pageId="2" pageNumber="275" rank="species">sp. nov.</taxonomicNameLabel>
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<subSubSection id="E69C33E1FFEBFFA054FFFE1DEAADF0B9" box="[151,499,475,501]" pageId="2" pageNumber="275" type="description">
<paragraph id="AE39606AFFEBFFA054FFFE1DEAADF0B9" blockId="2.[151,556,438,501]" box="[151,499,475,501]" pageId="2" pageNumber="275">
<figureCitation id="36BD7CEFFFEBFFA054FFFE1DEA66F0B9" box="[151,312,475,501]" captionStart="FIGURE 2" captionStartId="3.[152,255,1833,1857]" captionTargetBox="[159,1424,355,1810]" captionTargetId="figure-54@3.[151,1435,345,1810]" captionTargetPageId="3" captionText="FIGURE 2. Mediomastus biscayensis sp. nov.: A, anterior end, lateral view; B, thoracic hooded hook; C, abdominal hooded hook. Notomastus hutchingsae sp. nov.: D, Anterior end, lateral view; E, transition between thoracic and abdominal segments, dorsal view; F, abdominal hooded hooks in frontal and lateral views. Peresiella ellae sp. nov.: G, anterior end, lateral view; H, spatulate thoracic chaetae; I, abdominal hooded hook in frontal view. Abbreviations: ch, chaetiger; ne, neuropodium; no, notopodium; per, peristomium; pr, prostomium; pro, proboscis; seg, segment." figureDoi="http://doi.org/10.5281/zenodo.13346711" httpUri="https://zenodo.org/record/13346711/files/figure.png" pageId="2" pageNumber="275">Figures 2AC</figureCitation>
,
<figureCitation id="36BD7CEFFFEBFFA0552BFE1DEAD8F0B9" box="[323,390,475,501]" captionStart="FIGURE 3" captionStartId="10.[152,255,1555,1579]" captionTargetBox="[151,1436,181,1531]" captionTargetId="figure-20@10.[151,1436,181,1531]" captionTargetPageId="10" captionText="FIGURE 3. Mediomastus biscayensis sp. nov.: A, bilimbate capillaries of an anterior notopodium; B, thoracic hooded hooks; C, abdominal hooded hook. Notomastus hutchingsae sp. nov.: D, Anterior abdominal notopodial hooks; E, anterior abdominal neuropodial hooks. Peresiella ellae sp. nov.: F, a bilimbate capillary from notopodium of chaetiger 2; G, spatulate thoracic chaetae; H, abdominal hooded hooks." figureDoi="http://doi.org/10.5281/zenodo.13346713" httpUri="https://zenodo.org/record/13346713/files/figure.png" pageId="2" pageNumber="275">3AC</figureCitation>
&amp;
<figureCitation id="36BD7CEFFFEBFFA055C2FE1DEAAEF0B9" box="[426,496,475,501]" captionStart="FIGURE 4" captionStartId="12.[152,255,1874,1898]" captionTargetBox="[203,1383,181,1850]" captionTargetId="figure-20@12.[203,1383,181,1850]" captionTargetPageId="12" captionText="FIGURE 4. MGSP of French capitellids. Mediomastus biscayensis sp. nov.: A, anterior end, lateral view; B, Detail of anterior end in lateral view stained with Shirlastain A. Notomastus hutchingsae sp. nov.: C, Anterior end, lateral view; D, Detail of thoracic region in lateral view stained with Shirlastain A. Peresiella ellae sp. nov.: E, holotype in lateral view showing fragmented mucous tube; F, detail of anterior end, lateral view. Abbreviations: ch, chaetiger; pa, palpode; per, peristomium; pr, prostomium; pro, proboscis; seg, segment." figureDoi="http://doi.org/10.5281/zenodo.13346717" httpUri="https://zenodo.org/record/13346717/files/figure.png" pageId="2" pageNumber="275">4A, B</figureCitation>
.
</paragraph>
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<subSubSection id="E69C33E1FFEBFFA054FFFDE4EF3EF3C9" pageId="2" pageNumber="275" type="materials_examined">
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<emphasis id="9CF2BC78FFEBFFA054FFFDE4EA21F370" bold="true" box="[151,383,546,572]" pageId="2" pageNumber="275">Material examined.</emphasis>
<materialsCitation id="1EEE6A37FFEBFFA055ECFDE5E9AEF32D" ID-GBIF-Occurrence="4927504305" collectorName="West Gironde Mud Patch M" county="West Gironde Mud Patch" elevation="68" latitude="45.602" location="Northern Atlantic" longLatPrecision="67" longitude="1.813" municipality="Bay of Biscay" pageId="2" pageNumber="275" specimenCount="68" typeStatus="holotype">
<typeStatus id="713DDEC8FFEBFFA055ECFDE5EAAFF371" box="[388,497,547,573]" pageId="2" pageNumber="275" type="holotype">Holotype</typeStatus>
:
<emphasis id="9CF2BC78FFEBFFA05591FDE4E9A2F370" bold="true" box="[505,764,546,572]" pageId="2" pageNumber="275">MNHN-IA-2000-2086</emphasis>
, incomplete,
<location id="AB5936B1FFEBFFA057F9FDE5EF08F371" LSID="urn:lsid:plazi:treatment:262FD17CFFEBFFA154FFFE70E9AFF051:AB5936B1FFEBFFA057F9FDE5EF08F371" box="[913,1110,547,573]" county="West Gironde Mud Patch" latitude="45.602" longLatPrecision="67" longitude="1.813" municipality="Bay of Biscay" name="Northern Atlantic" pageId="2" pageNumber="275">Northern Atlantic</location>
,
<collectingMunicipality id="4E5DFA10FFEBFFA05008FDE5EFA5F371" box="[1120,1275,547,573]" pageId="2" pageNumber="275">Bay of Biscay</collectingMunicipality>
,
<collectorName id="037305BCFFEBFFA0516CFDE5EA6DF32D" pageId="2" pageNumber="275">
<collectingCounty id="475818E6FFEBFFA0516CFDE5EA4EF32D" pageId="2" pageNumber="275">West Gironde Mud Patch</collectingCounty>
M
</collectorName>
1-4KC,
<geoCoordinate id="CBB206ADFFEBFFA055E2FD80EAA7F32D" box="[394,505,582,609]" degrees="45.602" direction="north" orientation="latitude" pageId="2" pageNumber="275" precision="55" value="45.602">45.602°N</geoCoordinate>
,
<geoCoordinate id="CBB206ADFFEBFFA0566BFD81E93CF32D" box="[515,610,583,609]" degrees="1.813" direction="east" orientation="longitude" pageId="2" pageNumber="275" precision="55" value="1.813">1.813°E</geoCoordinate>
, depth
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<quantity id="697ECD8FFFEBFFA056D9FD81E9B2F32D" box="[689,748,583,609]" metricMagnitude="1" metricUnit="m" metricValue="6.8" pageId="2" pageNumber="275" unit="m" value="68.0">
<elevation id="25AB8759FFEBFFA056D9FD81E9B2F32D" box="[689,748,583,609]" metricMagnitude="1" metricUnit="m" metricValue="6.8" pageId="2" pageNumber="275" unit="m" value="68.0">68 m</elevation>
</quantity>
.
</specimenCount>
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<materialsCitation id="1EEE6A37FFEBFFA0569EFD81EF02F3C9" ID-GBIF-Occurrence="4927504306" collectionCode="MZUSP" collectorName="West Gironde Mud Patch M" county="West Gironde Mud Patch" elevation="70" latitude="45.615" location="Northern Atlantic" longLatPrecision="67" longitude="1.822" municipality="Bay of Biscay" pageId="2" pageNumber="275" specimenCode="MZUSP 5654" specimenCount="1" typeStatus="paratype">
<typeStatus id="713DDEC8FFEBFFA0569EFD81E802F32D" box="[758,860,583,609]" pageId="2" pageNumber="275" type="paratype">Paratype</typeStatus>
:
<emphasis id="9CF2BC78FFEBFFA0570EFD80EF59F32C" bold="true" box="[870,1031,582,608]" pageId="2" pageNumber="275">
<specimenCode id="FE20C811FFEBFFA0570EFD80EF59F32C" box="[870,1031,582,608]" collectionCode="MZUSP" country="Brazil" httpUri="http://grbio.org/cool/6yx0-3nm7" name="Museu de Zoologia da Universidade de Sao Paulo" pageId="2" pageNumber="275">MZUSP 5654</specimenCode>
</emphasis>
, incomplete,
<location id="AB5936B1FFEBFFA050F6FD81EE3BF32D" LSID="urn:lsid:plazi:treatment:262FD17CFFEBFFA154FFFE70E9AFF051:AB5936B1FFEBFFA050F6FD81EE3BF32D" box="[1182,1381,583,609]" county="West Gironde Mud Patch" latitude="45.615" longLatPrecision="67" longitude="1.822" municipality="Bay of Biscay" name="Northern Atlantic" pageId="2" pageNumber="275">Northern Atlantic</location>
,
<collectingMunicipality id="4E5DFA10FFEBFFA05107FD81EA5DF3C9" pageId="2" pageNumber="275">Bay of Biscay</collectingMunicipality>
,
<collectorName id="037305BCFFEBFFA05565FDADE913F3C9" box="[269,589,619,645]" pageId="2" pageNumber="275">
<collectingCounty id="475818E6FFEBFFA05565FDADE976F3C9" box="[269,552,619,645]" pageId="2" pageNumber="275">West Gironde Mud Patch</collectingCounty>
M
</collectorName>
1-4C,
<geoCoordinate id="CBB206ADFFEBFFA056E6FDACE9A0F3C9" box="[654,766,618,645]" degrees="45.615" direction="north" orientation="latitude" pageId="2" pageNumber="275" precision="55" value="45.615">45.615°N</geoCoordinate>
,
<geoCoordinate id="CBB206ADFFEBFFA05761FDADE838F3C9" box="[777,870,619,645]" degrees="1.822" direction="east" orientation="longitude" pageId="2" pageNumber="275" precision="55" value="1.822">1.822°E</geoCoordinate>
, depth
<quantity id="697ECD8FFFEBFFA057DFFDADE8AEF3C9" box="[951,1008,619,645]" metricMagnitude="1" metricUnit="m" metricValue="7.0" pageId="2" pageNumber="275" unit="m" value="70.0">
<elevation id="25AB8759FFEBFFA057DFFDADE8AEF3C9" box="[951,1008,619,645]" metricMagnitude="1" metricUnit="m" metricValue="7.0" pageId="2" pageNumber="275" unit="m" value="70.0">70 m</elevation>
</quantity>
(2 spms)
</materialsCitation>
.
</paragraph>
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<subSubSection id="E69C33E1FFEBFFA054AFFD48E96FF435" pageId="2" pageNumber="275" type="description">
<paragraph id="AE39606AFFEBFFA054AFFD48EF46F3BD" blockId="2.[151,1437,546,2013]" pageId="2" pageNumber="275">
<emphasis id="9CF2BC78FFEBFFA054AFFD48EA07F3E4" bold="true" box="[199,345,654,680]" pageId="2" pageNumber="275">Description.</emphasis>
<typeStatus id="713DDEC8FFEBFFA0550AFD49EA94F3E5" box="[354,458,655,681]" pageId="2" pageNumber="275" type="holotype">Holotype</typeStatus>
<quantity id="697ECD8FFFEBFFA055BCFD49E949F3E5" box="[468,535,655,681]" metricMagnitude="-3" metricUnit="m" metricValue="8.0" pageId="2" pageNumber="275" unit="mm" value="8.0">8 mm</quantity>
long,
<quantity id="697ECD8FFFEBFFA0560BFD48E997F3E5" box="[611,713,654,681]" metricMagnitude="-4" metricUnit="m" metricValue="1.5" pageId="2" pageNumber="275" unit="mm" value="0.15">0.15 mm</quantity>
wide, for 20 segments. Body thin, elongate, first four thoracic segments short, becoming as long as wide to end of thorax; abdominal segments twice as longer as wide, moniliform (
<figureCitation id="36BD7CEFFFEBFFA054F7FD11EBA3F3BD" box="[159,253,727,753]" captionStart="FIGURE 2" captionStartId="3.[152,255,1833,1857]" captionTargetBox="[159,1424,355,1810]" captionTargetId="figure-54@3.[151,1435,345,1810]" captionTargetPageId="3" captionText="FIGURE 2. Mediomastus biscayensis sp. nov.: A, anterior end, lateral view; B, thoracic hooded hook; C, abdominal hooded hook. Notomastus hutchingsae sp. nov.: D, Anterior end, lateral view; E, transition between thoracic and abdominal segments, dorsal view; F, abdominal hooded hooks in frontal and lateral views. Peresiella ellae sp. nov.: G, anterior end, lateral view; H, spatulate thoracic chaetae; I, abdominal hooded hook in frontal view. Abbreviations: ch, chaetiger; ne, neuropodium; no, notopodium; per, peristomium; pr, prostomium; pro, proboscis; seg, segment." figureDoi="http://doi.org/10.5281/zenodo.13346711" httpUri="https://zenodo.org/record/13346711/files/figure.png" pageId="2" pageNumber="275">Figs 2A</figureCitation>
;
<figureCitation id="36BD7CEFFFEBFFA05561FD11EA70F3BD" box="[265,302,727,753]" captionStart="FIGURE 3" captionStartId="10.[152,255,1555,1579]" captionTargetBox="[151,1436,181,1531]" captionTargetId="figure-20@10.[151,1436,181,1531]" captionTargetPageId="10" captionText="FIGURE 3. Mediomastus biscayensis sp. nov.: A, bilimbate capillaries of an anterior notopodium; B, thoracic hooded hooks; C, abdominal hooded hook. Notomastus hutchingsae sp. nov.: D, Anterior abdominal notopodial hooks; E, anterior abdominal neuropodial hooks. Peresiella ellae sp. nov.: F, a bilimbate capillary from notopodium of chaetiger 2; G, spatulate thoracic chaetae; H, abdominal hooded hooks." figureDoi="http://doi.org/10.5281/zenodo.13346713" httpUri="https://zenodo.org/record/13346713/files/figure.png" pageId="2" pageNumber="275">3A</figureCitation>
). Dorsal and lateral grooves absent. Colour in alcohol pale yellow.
</paragraph>
<paragraph id="AE39606AFFEBFFA054AFFD3DE93DF2CD" blockId="2.[151,1437,546,2013]" pageId="2" pageNumber="275">
Prostomium short, conical, with papilliform palpode (
<figureCitation id="36BD7CEFFFEBFFA05746FD3DE8D1F259" box="[814,911,763,789]" captionStart="FIGURE 2" captionStartId="3.[152,255,1833,1857]" captionTargetBox="[159,1424,355,1810]" captionTargetId="figure-54@3.[151,1435,345,1810]" captionTargetPageId="3" captionText="FIGURE 2. Mediomastus biscayensis sp. nov.: A, anterior end, lateral view; B, thoracic hooded hook; C, abdominal hooded hook. Notomastus hutchingsae sp. nov.: D, Anterior end, lateral view; E, transition between thoracic and abdominal segments, dorsal view; F, abdominal hooded hooks in frontal and lateral views. Peresiella ellae sp. nov.: G, anterior end, lateral view; H, spatulate thoracic chaetae; I, abdominal hooded hook in frontal view. Abbreviations: ch, chaetiger; ne, neuropodium; no, notopodium; per, peristomium; pr, prostomium; pro, proboscis; seg, segment." figureDoi="http://doi.org/10.5281/zenodo.13346711" httpUri="https://zenodo.org/record/13346711/files/figure.png" pageId="2" pageNumber="275">Figs 2A</figureCitation>
;
<figureCitation id="36BD7CEFFFEBFFA057F4FD3DE89EF259" box="[924,960,763,789]" captionStart="FIGURE 4" captionStartId="12.[152,255,1874,1898]" captionTargetBox="[203,1383,181,1850]" captionTargetId="figure-20@12.[203,1383,181,1850]" captionTargetPageId="12" captionText="FIGURE 4. MGSP of French capitellids. Mediomastus biscayensis sp. nov.: A, anterior end, lateral view; B, Detail of anterior end in lateral view stained with Shirlastain A. Notomastus hutchingsae sp. nov.: C, Anterior end, lateral view; D, Detail of thoracic region in lateral view stained with Shirlastain A. Peresiella ellae sp. nov.: E, holotype in lateral view showing fragmented mucous tube; F, detail of anterior end, lateral view. Abbreviations: ch, chaetiger; pa, palpode; per, peristomium; pr, prostomium; pro, proboscis; seg, segment." figureDoi="http://doi.org/10.5281/zenodo.13346717" httpUri="https://zenodo.org/record/13346717/files/figure.png" pageId="2" pageNumber="275">4B</figureCitation>
). Eyespots absent; nuchal organs present, postero-lateral to prostomium. Peristomium well-separated from prostomium and chaetiger 1, slightly longer than chaetiger 1 dorsally (
<figureCitation id="36BD7CEFFFEBFFA055EAFC85EABEF211" box="[386,480,835,861]" captionStart="FIGURE 2" captionStartId="3.[152,255,1833,1857]" captionTargetBox="[159,1424,355,1810]" captionTargetId="figure-54@3.[151,1435,345,1810]" captionTargetPageId="3" captionText="FIGURE 2. Mediomastus biscayensis sp. nov.: A, anterior end, lateral view; B, thoracic hooded hook; C, abdominal hooded hook. Notomastus hutchingsae sp. nov.: D, Anterior end, lateral view; E, transition between thoracic and abdominal segments, dorsal view; F, abdominal hooded hooks in frontal and lateral views. Peresiella ellae sp. nov.: G, anterior end, lateral view; H, spatulate thoracic chaetae; I, abdominal hooded hook in frontal view. Abbreviations: ch, chaetiger; ne, neuropodium; no, notopodium; per, peristomium; pr, prostomium; pro, proboscis; seg, segment." figureDoi="http://doi.org/10.5281/zenodo.13346711" httpUri="https://zenodo.org/record/13346711/files/figure.png" pageId="2" pageNumber="275">Figs 2A</figureCitation>
;
<figureCitation id="36BD7CEFFFEBFFA05582FC85E951F211" box="[490,527,835,861]" captionStart="FIGURE 4" captionStartId="12.[152,255,1874,1898]" captionTargetBox="[203,1383,181,1850]" captionTargetId="figure-20@12.[203,1383,181,1850]" captionTargetPageId="12" captionText="FIGURE 4. MGSP of French capitellids. Mediomastus biscayensis sp. nov.: A, anterior end, lateral view; B, Detail of anterior end in lateral view stained with Shirlastain A. Notomastus hutchingsae sp. nov.: C, Anterior end, lateral view; D, Detail of thoracic region in lateral view stained with Shirlastain A. Peresiella ellae sp. nov.: E, holotype in lateral view showing fragmented mucous tube; F, detail of anterior end, lateral view. Abbreviations: ch, chaetiger; pa, palpode; per, peristomium; pr, prostomium; pro, proboscis; seg, segment." figureDoi="http://doi.org/10.5281/zenodo.13346717" httpUri="https://zenodo.org/record/13346717/files/figure.png" pageId="2" pageNumber="275">4B</figureCitation>
). Proboscis everted in
<specimenCount id="B880ABE3FFEBFFA05763FC85E8F9F211" box="[779,935,835,861]" count="1" pageId="2" pageNumber="275" type="generic">one specimen</specimenCount>
, bulbous, bilobed with basal lobe covered by numerous short round papillae (
<figureCitation id="36BD7CEFFFEBFFA05594FCA1E908F2CD" box="[508,598,871,897]" captionStart="FIGURE 2" captionStartId="3.[152,255,1833,1857]" captionTargetBox="[159,1424,355,1810]" captionTargetId="figure-54@3.[151,1435,345,1810]" captionTargetPageId="3" captionText="FIGURE 2. Mediomastus biscayensis sp. nov.: A, anterior end, lateral view; B, thoracic hooded hook; C, abdominal hooded hook. Notomastus hutchingsae sp. nov.: D, Anterior end, lateral view; E, transition between thoracic and abdominal segments, dorsal view; F, abdominal hooded hooks in frontal and lateral views. Peresiella ellae sp. nov.: G, anterior end, lateral view; H, spatulate thoracic chaetae; I, abdominal hooded hook in frontal view. Abbreviations: ch, chaetiger; ne, neuropodium; no, notopodium; per, peristomium; pr, prostomium; pro, proboscis; seg, segment." figureDoi="http://doi.org/10.5281/zenodo.13346711" httpUri="https://zenodo.org/record/13346711/files/figure.png" pageId="2" pageNumber="275">Fig. 2A</figureCitation>
).
</paragraph>
<paragraph id="AE39606AFFEBFFA054AFFC4DE84FF579" blockId="2.[151,1437,546,2013]" pageId="2" pageNumber="275">
Thorax with ten chaetigers (
<figureCitation id="36BD7CEFFFEBFFA05597FC4DE903F2E9" box="[511,605,907,933]" captionStart="FIGURE 2" captionStartId="3.[152,255,1833,1857]" captionTargetBox="[159,1424,355,1810]" captionTargetId="figure-54@3.[151,1435,345,1810]" captionTargetPageId="3" captionText="FIGURE 2. Mediomastus biscayensis sp. nov.: A, anterior end, lateral view; B, thoracic hooded hook; C, abdominal hooded hook. Notomastus hutchingsae sp. nov.: D, Anterior end, lateral view; E, transition between thoracic and abdominal segments, dorsal view; F, abdominal hooded hooks in frontal and lateral views. Peresiella ellae sp. nov.: G, anterior end, lateral view; H, spatulate thoracic chaetae; I, abdominal hooded hook in frontal view. Abbreviations: ch, chaetiger; ne, neuropodium; no, notopodium; per, peristomium; pr, prostomium; pro, proboscis; seg, segment." figureDoi="http://doi.org/10.5281/zenodo.13346711" httpUri="https://zenodo.org/record/13346711/files/figure.png" pageId="2" pageNumber="275">Figs 2A</figureCitation>
;
<figureCitation id="36BD7CEFFFEBFFA0560FFC4DE9D3F2E9" box="[615,653,907,933]" captionStart="FIGURE 3" captionStartId="10.[152,255,1555,1579]" captionTargetBox="[151,1436,181,1531]" captionTargetId="figure-20@10.[151,1436,181,1531]" captionTargetPageId="10" captionText="FIGURE 3. Mediomastus biscayensis sp. nov.: A, bilimbate capillaries of an anterior notopodium; B, thoracic hooded hooks; C, abdominal hooded hook. Notomastus hutchingsae sp. nov.: D, Anterior abdominal notopodial hooks; E, anterior abdominal neuropodial hooks. Peresiella ellae sp. nov.: F, a bilimbate capillary from notopodium of chaetiger 2; G, spatulate thoracic chaetae; H, abdominal hooded hooks." figureDoi="http://doi.org/10.5281/zenodo.13346713" httpUri="https://zenodo.org/record/13346713/files/figure.png" pageId="2" pageNumber="275">3A</figureCitation>
); chaetigers 14 biramous with notopodial and neuropodial capillaries (
<figureCitation id="36BD7CEFFFEBFFA054F7FC69EBA7F285" box="[159,249,943,969]" captionStart="FIGURE 2" captionStartId="3.[152,255,1833,1857]" captionTargetBox="[159,1424,355,1810]" captionTargetId="figure-54@3.[151,1435,345,1810]" captionTargetPageId="3" captionText="FIGURE 2. Mediomastus biscayensis sp. nov.: A, anterior end, lateral view; B, thoracic hooded hook; C, abdominal hooded hook. Notomastus hutchingsae sp. nov.: D, Anterior end, lateral view; E, transition between thoracic and abdominal segments, dorsal view; F, abdominal hooded hooks in frontal and lateral views. Peresiella ellae sp. nov.: G, anterior end, lateral view; H, spatulate thoracic chaetae; I, abdominal hooded hook in frontal view. Abbreviations: ch, chaetiger; ne, neuropodium; no, notopodium; per, peristomium; pr, prostomium; pro, proboscis; seg, segment." figureDoi="http://doi.org/10.5281/zenodo.13346711" httpUri="https://zenodo.org/record/13346711/files/figure.png" pageId="2" pageNumber="275">Fig. 2A</figureCitation>
); capillaries bilimbate (
<figureCitation id="36BD7CEFFFEBFFA05597FC69E908F285" box="[511,598,943,969]" captionStart="FIGURE 3" captionStartId="10.[152,255,1555,1579]" captionTargetBox="[151,1436,181,1531]" captionTargetId="figure-20@10.[151,1436,181,1531]" captionTargetPageId="10" captionText="FIGURE 3. Mediomastus biscayensis sp. nov.: A, bilimbate capillaries of an anterior notopodium; B, thoracic hooded hooks; C, abdominal hooded hook. Notomastus hutchingsae sp. nov.: D, Anterior abdominal notopodial hooks; E, anterior abdominal neuropodial hooks. Peresiella ellae sp. nov.: F, a bilimbate capillary from notopodium of chaetiger 2; G, spatulate thoracic chaetae; H, abdominal hooded hooks." figureDoi="http://doi.org/10.5281/zenodo.13346713" httpUri="https://zenodo.org/record/13346713/files/figure.png" pageId="2" pageNumber="275">Fig. 3A</figureCitation>
) organized in two rows of four capillaries in each fascicle. Chaetigers 510 with long-shafted hooded hooks (
<figureCitation id="36BD7CEFFFEBFFA05679FC15E933F2A1" box="[529,621,979,1005]" captionStart="FIGURE 2" captionStartId="3.[152,255,1833,1857]" captionTargetBox="[159,1424,355,1810]" captionTargetId="figure-54@3.[151,1435,345,1810]" captionTargetPageId="3" captionText="FIGURE 2. Mediomastus biscayensis sp. nov.: A, anterior end, lateral view; B, thoracic hooded hook; C, abdominal hooded hook. Notomastus hutchingsae sp. nov.: D, Anterior end, lateral view; E, transition between thoracic and abdominal segments, dorsal view; F, abdominal hooded hooks in frontal and lateral views. Peresiella ellae sp. nov.: G, anterior end, lateral view; H, spatulate thoracic chaetae; I, abdominal hooded hook in frontal view. Abbreviations: ch, chaetiger; ne, neuropodium; no, notopodium; per, peristomium; pr, prostomium; pro, proboscis; seg, segment." figureDoi="http://doi.org/10.5281/zenodo.13346711" httpUri="https://zenodo.org/record/13346711/files/figure.png" pageId="2" pageNumber="275">Figs 2B</figureCitation>
;
<figureCitation id="36BD7CEFFFEBFFA05612FC15E9C3F2A1" box="[634,669,979,1005]" captionStart="FIGURE 3" captionStartId="10.[152,255,1555,1579]" captionTargetBox="[151,1436,181,1531]" captionTargetId="figure-20@10.[151,1436,181,1531]" captionTargetPageId="10" captionText="FIGURE 3. Mediomastus biscayensis sp. nov.: A, bilimbate capillaries of an anterior notopodium; B, thoracic hooded hooks; C, abdominal hooded hook. Notomastus hutchingsae sp. nov.: D, Anterior abdominal notopodial hooks; E, anterior abdominal neuropodial hooks. Peresiella ellae sp. nov.: F, a bilimbate capillary from notopodium of chaetiger 2; G, spatulate thoracic chaetae; H, abdominal hooded hooks." figureDoi="http://doi.org/10.5281/zenodo.13346713" httpUri="https://zenodo.org/record/13346713/files/figure.png" pageId="2" pageNumber="275">3B</figureCitation>
). Notopodial and neuropodial long-shafted hooded hook numbering six per fascicle; hooks long, without distinct constriction and with at least four rows of small teeth above main fang (
<figureCitation id="36BD7CEFFFEBFFA054F7FBDDEBA9F579" box="[159,247,1051,1077]" captionStart="FIGURE 3" captionStartId="10.[152,255,1555,1579]" captionTargetBox="[151,1436,181,1531]" captionTargetId="figure-20@10.[151,1436,181,1531]" captionTargetPageId="10" captionText="FIGURE 3. Mediomastus biscayensis sp. nov.: A, bilimbate capillaries of an anterior notopodium; B, thoracic hooded hooks; C, abdominal hooded hook. Notomastus hutchingsae sp. nov.: D, Anterior abdominal notopodial hooks; E, anterior abdominal neuropodial hooks. Peresiella ellae sp. nov.: F, a bilimbate capillary from notopodium of chaetiger 2; G, spatulate thoracic chaetae; H, abdominal hooded hooks." figureDoi="http://doi.org/10.5281/zenodo.13346713" httpUri="https://zenodo.org/record/13346713/files/figure.png" pageId="2" pageNumber="275">Fig. 3B</figureCitation>
). Lateral organs and genital pores not observed.
</paragraph>
<paragraph id="AE39606AFFEBFFA054AFFBF9E80DF441" blockId="2.[151,1437,546,2013]" pageId="2" pageNumber="275">
Transition between thorax and abdomen marked by changes in shape of segments, slight constriction, and length of hooded hooks (
<figureCitation id="36BD7CEFFFEBFFA05502FBA5EA96F531" box="[362,456,1123,1149]" captionStart="FIGURE 4" captionStartId="12.[152,255,1874,1898]" captionTargetBox="[203,1383,181,1850]" captionTargetId="figure-20@12.[203,1383,181,1850]" captionTargetPageId="12" captionText="FIGURE 4. MGSP of French capitellids. Mediomastus biscayensis sp. nov.: A, anterior end, lateral view; B, Detail of anterior end in lateral view stained with Shirlastain A. Notomastus hutchingsae sp. nov.: C, Anterior end, lateral view; D, Detail of thoracic region in lateral view stained with Shirlastain A. Peresiella ellae sp. nov.: E, holotype in lateral view showing fragmented mucous tube; F, detail of anterior end, lateral view. Abbreviations: ch, chaetiger; pa, palpode; per, peristomium; pr, prostomium; pro, proboscis; seg, segment." figureDoi="http://doi.org/10.5281/zenodo.13346717" httpUri="https://zenodo.org/record/13346717/files/figure.png" pageId="2" pageNumber="275">Fig. 4A</figureCitation>
). Abdominal segments longer than wider (
<figureCitation id="36BD7CEFFFEBFFA057DCFBA5EF51F531" box="[948,1039,1123,1149]" captionStart="FIGURE 4" captionStartId="12.[152,255,1874,1898]" captionTargetBox="[203,1383,181,1850]" captionTargetId="figure-20@12.[203,1383,181,1850]" captionTargetPageId="12" captionText="FIGURE 4. MGSP of French capitellids. Mediomastus biscayensis sp. nov.: A, anterior end, lateral view; B, Detail of anterior end in lateral view stained with Shirlastain A. Notomastus hutchingsae sp. nov.: C, Anterior end, lateral view; D, Detail of thoracic region in lateral view stained with Shirlastain A. Peresiella ellae sp. nov.: E, holotype in lateral view showing fragmented mucous tube; F, detail of anterior end, lateral view. Abbreviations: ch, chaetiger; pa, palpode; per, peristomium; pr, prostomium; pro, proboscis; seg, segment." figureDoi="http://doi.org/10.5281/zenodo.13346717" httpUri="https://zenodo.org/record/13346717/files/figure.png" pageId="2" pageNumber="275">Fig. 4A</figureCitation>
) and becoming longer posteriorly. Notopodial and neuropodial tori short and well-separated emerging from posterior end of segments; notopodial tori dorsal and neuropodial tori ventral. Abdominal region with only hooded hooks throughout, slightly shorter than thoracic hooks (
<figureCitation id="36BD7CEFFFEBFFA05523FB09EAF7F5A5" box="[331,425,1231,1257]" captionStart="FIGURE 2" captionStartId="3.[152,255,1833,1857]" captionTargetBox="[159,1424,355,1810]" captionTargetId="figure-54@3.[151,1435,345,1810]" captionTargetPageId="3" captionText="FIGURE 2. Mediomastus biscayensis sp. nov.: A, anterior end, lateral view; B, thoracic hooded hook; C, abdominal hooded hook. Notomastus hutchingsae sp. nov.: D, Anterior end, lateral view; E, transition between thoracic and abdominal segments, dorsal view; F, abdominal hooded hooks in frontal and lateral views. Peresiella ellae sp. nov.: G, anterior end, lateral view; H, spatulate thoracic chaetae; I, abdominal hooded hook in frontal view. Abbreviations: ch, chaetiger; ne, neuropodium; no, notopodium; per, peristomium; pr, prostomium; pro, proboscis; seg, segment." figureDoi="http://doi.org/10.5281/zenodo.13346711" httpUri="https://zenodo.org/record/13346711/files/figure.png" pageId="2" pageNumber="275">Figs 2C</figureCitation>
;
<figureCitation id="36BD7CEFFFEBFFA055DDFB09EA86F5A5" box="[437,472,1231,1257]" captionStart="FIGURE 3" captionStartId="10.[152,255,1555,1579]" captionTargetBox="[151,1436,181,1531]" captionTargetId="figure-20@10.[151,1436,181,1531]" captionTargetPageId="10" captionText="FIGURE 3. Mediomastus biscayensis sp. nov.: A, bilimbate capillaries of an anterior notopodium; B, thoracic hooded hooks; C, abdominal hooded hook. Notomastus hutchingsae sp. nov.: D, Anterior abdominal notopodial hooks; E, anterior abdominal neuropodial hooks. Peresiella ellae sp. nov.: F, a bilimbate capillary from notopodium of chaetiger 2; G, spatulate thoracic chaetae; H, abdominal hooded hooks." figureDoi="http://doi.org/10.5281/zenodo.13346713" httpUri="https://zenodo.org/record/13346713/files/figure.png" pageId="2" pageNumber="275">3C</figureCitation>
), without distinct constriction and with 34 rows of few teeth (about six) above main fang; abdominal hooded hooks few numbering 610 per torus.
</paragraph>
<paragraph id="AE39606AFFEBFFA054AFFAD1EA8DF47D" blockId="2.[151,1437,546,2013]" box="[199,467,1303,1329]" pageId="2" pageNumber="275">Pygidium not observed.</paragraph>
<paragraph id="AE39606AFFEBFFA054AFFAFDE96FF435" blockId="2.[151,1437,546,2013]" pageId="2" pageNumber="275">
<emphasis id="9CF2BC78FFEBFFA054AFFAFDE91AF419" bold="true" box="[199,580,1338,1365]" pageId="2" pageNumber="275">Methyl Green Staining Pattern.</emphasis>
Chaetigers 59 with sparse green speckles (
<figureCitation id="36BD7CEFFFEBFFA05054FAFDEFC6F419" box="[1084,1176,1339,1365]" captionStart="FIGURE 4" captionStartId="12.[152,255,1874,1898]" captionTargetBox="[203,1383,181,1850]" captionTargetId="figure-20@12.[203,1383,181,1850]" captionTargetPageId="12" captionText="FIGURE 4. MGSP of French capitellids. Mediomastus biscayensis sp. nov.: A, anterior end, lateral view; B, Detail of anterior end in lateral view stained with Shirlastain A. Notomastus hutchingsae sp. nov.: C, Anterior end, lateral view; D, Detail of thoracic region in lateral view stained with Shirlastain A. Peresiella ellae sp. nov.: E, holotype in lateral view showing fragmented mucous tube; F, detail of anterior end, lateral view. Abbreviations: ch, chaetiger; pa, palpode; per, peristomium; pr, prostomium; pro, proboscis; seg, segment." figureDoi="http://doi.org/10.5281/zenodo.13346717" httpUri="https://zenodo.org/record/13346717/files/figure.png" pageId="2" pageNumber="275">Fig. 4A</figureCitation>
). Chaetigers 10 and 11 with dense green speckles (
<figureCitation id="36BD7CEFFFEBFFA055A2FA99E97BF435" box="[458,549,1375,1401]" captionStart="FIGURE 4" captionStartId="12.[152,255,1874,1898]" captionTargetBox="[203,1383,181,1850]" captionTargetId="figure-20@12.[203,1383,181,1850]" captionTargetPageId="12" captionText="FIGURE 4. MGSP of French capitellids. Mediomastus biscayensis sp. nov.: A, anterior end, lateral view; B, Detail of anterior end in lateral view stained with Shirlastain A. Notomastus hutchingsae sp. nov.: C, Anterior end, lateral view; D, Detail of thoracic region in lateral view stained with Shirlastain A. Peresiella ellae sp. nov.: E, holotype in lateral view showing fragmented mucous tube; F, detail of anterior end, lateral view. Abbreviations: ch, chaetiger; pa, palpode; per, peristomium; pr, prostomium; pro, proboscis; seg, segment." figureDoi="http://doi.org/10.5281/zenodo.13346717" httpUri="https://zenodo.org/record/13346717/files/figure.png" pageId="2" pageNumber="275">Fig. 4A</figureCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="E69C33E1FFEBFFA054AFFA45EECCF691" pageId="2" pageNumber="275" type="discussion">
<paragraph id="AE39606AFFEBFFA054AFFA45EBA4F7D5" blockId="2.[151,1437,546,2013]" pageId="2" pageNumber="275">
<emphasis id="9CF2BC78FFEBFFA054AFFA45EA65F4D1" bold="true" box="[199,315,1411,1437]" pageId="2" pageNumber="275">Remarks.</emphasis>
There are 17 described species of
<taxonomicName id="69861BE9FFEBFFA056B7FA45E82AF4D1" authorityName="Hartman" authorityYear="1944" box="[735,884,1411,1437]" class="Polychaeta" family="Capitellidae" genus="Mediomastus" kingdom="Animalia" pageId="2" pageNumber="275" phylum="Annelida" rank="genus">
<emphasis id="9CF2BC78FFEBFFA056B7FA45E82AF4D1" box="[735,884,1411,1437]" italics="true" pageId="2" pageNumber="275">Mediomastus</emphasis>
</taxonomicName>
, the most recent species described from
<collectingCountry id="D69120FAFFEBFFA05134FA45EEC2F4D1" box="[1372,1436,1411,1437]" name="Japan" pageId="2" pageNumber="275">Japan</collectingCountry>
(
<bibRefCitation id="CA171D9BFFEBFFA054F6FA61EAD0F48D" author="Tomioka, S. &amp; Hiruta, S. F. &amp; Kajihara, H." box="[158,398,1447,1473]" pageId="2" pageNumber="275" pagination="105 - 110" refId="ref9398" refString="Tomioka, S., Hiruta, S. F. &amp; Kajihara, H. (2013) Description of Mediomastus opertaculeus sp. nov. (Annelida: Capitellidae) from Hokkaido, northern Japan. Species Diversity, 18 (1), 105 - 110. https: // doi. org / 10.12782 / sd. 18.1.105" type="journal article" year="2013">
Tomioka
<emphasis id="9CF2BC78FFEBFFA05566FA61EA17F48D" box="[270,329,1447,1473]" italics="true" pageId="2" pageNumber="275">et al.</emphasis>
2013
</bibRefCitation>
,
<bibRefCitation id="CA171D9BFFEBFFA055F4FA61EA88F48D" author="Tomioka, S. &amp; Nishi, E. &amp; Kajihara, H." box="[412,470,1447,1473]" pageId="2" pageNumber="275" pagination="115 - 126" refId="ref9460" refString="Tomioka, S., Nishi, E. &amp; Kajihara, H. (2014) Two new species of Mediomastus (Annelida, Capitellidae) from Tokyo Bay, Japan. Zookeys, 422, 115 - 126. https: // doi. org / 10.3897 / zookeys. 422.7501" type="journal article" year="2014">2014</bibRefCitation>
) and
<collectingCountry id="D69120FAFFEBFFA05671FA61E902F48D" box="[537,604,1447,1473]" name="China" pageId="2" pageNumber="275">China</collectingCountry>
(
<bibRefCitation id="CA171D9BFFEBFFA05606FA61E87EF48D" author="Lin, J. &amp; Wang, J. &amp; Zheng, F." box="[622,800,1447,1473]" pageId="2" pageNumber="275" pagination="126 - 129" refId="ref8878" refString="Lin, J., Wang, J. &amp; Zheng, F. (2018) Mediomastus chinensis sp. nov., a new species of Capitellidae (Annelida: Polychaeta) from the southeast coast of China. Acta Oceanologica Sinica, 37 (10), 126 - 129. https: // doi. org / 10.1007 / s 13131 - 018 - 1316 - z" type="journal article" year="2018">
Lin
<emphasis id="9CF2BC78FFEBFFA056C9FA61E982F48D" box="[673,732,1447,1473]" italics="true" pageId="2" pageNumber="275">et al.</emphasis>
2018
</bibRefCitation>
) from specimens previously identified as
<taxonomicName id="69861BE9FFEBFFA0516FFA61EABDF4A9" authority="Hartman, 1944" authorityName="Hartman" authorityYear="1944" class="Polychaeta" family="Capitellidae" genus="Mediomastus" kingdom="Animalia" pageId="2" pageNumber="275" phylum="Annelida" rank="species" species="californiensis">
<emphasis id="9CF2BC78FFEBFFA0516FFA61EA71F4A9" italics="true" pageId="2" pageNumber="275">Mediomastus californiensis</emphasis>
<bibRefCitation id="CA171D9BFFEBFFA0555FFA0DEABDF4A9" author="Hartman, O." box="[311,483,1483,1509]" pageId="2" pageNumber="275" pagination="239 - 307" refId="ref8608" refString="Hartman, O. (1944) Polychaetous annelids from California, including the descriptions of two new genera and nine new species. Allan Hancock Pacific Expeditions, 10 (2), 239 - 307." type="journal article" year="1944">Hartman, 1944</bibRefCitation>
</taxonomicName>
. The most comprehensive review of the genus was provided by
<bibRefCitation id="CA171D9BFFEBFFA050D0FA0DEEC2F4A9" author="Warren, L. M. &amp; Hutchings, P. A. &amp; Doyle, S." box="[1208,1436,1483,1509]" pageId="2" pageNumber="275" pagination="227 - 256" refId="ref9562" refString="Warren, L. M., Hutchings, P. A. &amp; Doyle, S. (1994) A revision of the genus Mediomastus Hartman, 1944 (Polychaeta: Capitellidae). Records of the Australian Museum, 46 (3), 227 - 256. https: // doi. org / 10.3853 / j. 0067 - 1975.46.1994.6" type="journal article" year="1994">
Warren
<emphasis id="9CF2BC78FFEBFFA05179FA0DEE1DF4A9" box="[1297,1347,1483,1509]" italics="true" pageId="2" pageNumber="275">et al</emphasis>
. (1994)
</bibRefCitation>
together with a comparative table with diagnostic characters. An updated key to species was provided in
<bibRefCitation id="CA171D9BFFEBFFA05151FA29EA77F761" author="Tomioka, S. &amp; Nishi, E. &amp; Kajihara, H." pageId="2" pageNumber="275" pagination="115 - 126" refId="ref9460" refString="Tomioka, S., Nishi, E. &amp; Kajihara, H. (2014) Two new species of Mediomastus (Annelida, Capitellidae) from Tokyo Bay, Japan. Zookeys, 422, 115 - 126. https: // doi. org / 10.3897 / zookeys. 422.7501" type="journal article" year="2014">
Tomioka
<emphasis id="9CF2BC78FFEBFFA054FFF9D5EB95F761" box="[151,203,1555,1581]" italics="true" pageId="2" pageNumber="275">et al</emphasis>
. (2014)
</bibRefCitation>
.
<taxonomicName id="69861BE9FFEBFFA0555EF9D5E90BF761" authorityName="Magalhães &amp; Lavesque &amp; Lamarque" authorityYear="2024" box="[310,597,1555,1581]" class="Polychaeta" family="Capitellidae" genus="Mediomastus" kingdom="Animalia" pageId="2" pageNumber="275" phylum="Annelida" rank="species" species="biscayensis" status="sp. nov.">
<emphasis id="9CF2BC78FFEBFFA0555EF9D5E90BF761" box="[310,597,1555,1581]" italics="true" pageId="2" pageNumber="275">Mediomastus biscayensis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="87C10103FFEBFFA05636F9D5E9E9F761" box="[606,695,1555,1581]" pageId="2" pageNumber="275" rank="species">sp. nov.</taxonomicNameLabel>
is distinct from its congeners by a combination of characters: i) bilimbate thoracic capillaries; ii) thoracic and abdominal hooks similar in shape and with slight difference in length; iii) distinct MGSP: chaetigers 59 with sparse green speckles and chaetigers 1011 with dense green speckles (See
<tableCitation id="E30455D1FFEBFFA054FFF9B9EBB7F7D5" box="[151,233,1663,1689]" captionStart="TABLE 1" captionStartId="4.[152,244,480,506]" captionTargetBox="[162,2012,556,1668]" captionText="TABLE 1. Comparative morphological features of all described species of Mediomastus (modified after Warren et al. 1994). Branchiae only present in M. branchiferous. For thoracic and abdominal hooks, notopodial and neuropodial hooks similar, otherwise stated." httpUri="http://table.plazi.org/id/FAF930E2FFEDFFA654F0FE26EF3CF352" pageId="2" pageNumber="275" tableUuid="FAF930E2FFEDFFA654F0FE26EF3CF352">Table 1</tableCitation>
).
</paragraph>
<paragraph id="AE39606AFFEBFFA054AFF965EECCF691" blockId="2.[151,1437,546,2013]" pageId="2" pageNumber="275">
<taxonomicName id="69861BE9FFEBFFA054AFF965E965F7F1" authority="Day, 1961" authorityName="Day, Long" authorityYear="1961" box="[199,571,1699,1725]" class="Polychaeta" family="Capitellidae" genus="Mediomastus" kingdom="Animalia" pageId="2" pageNumber="275" phylum="Annelida" rank="species" species="capensis">
<emphasis id="9CF2BC78FFEBFFA054AFF965EA9DF7F0" box="[199,451,1699,1725]" italics="true" pageId="2" pageNumber="275">Mediomastus capensis</emphasis>
<bibRefCitation id="CA171D9BFFEBFFA055A1F965E965F7F1" author="Day, J. H." box="[457,571,1699,1725]" pageId="2" pageNumber="275" pagination="463 - 560" refId="ref7933" refString="Day, J. H. (1961) The Polychaet Fauna of South Africa. Part 6. Sedentary species dredged off Cape coasts with a few new records from the shore. Journal of the Linnean Society of London, 44 (299), 463 - 560. https: // doi. org / 10.1111 / j. 1096 - 3642.1961. tb 01623. x" type="journal article" year="1961">Day, 1961</bibRefCitation>
</taxonomicName>
is a similar species with bilimbate capillaries and by having abdominal hooks that are slightly shorter than thoracic ones (
<bibRefCitation id="CA171D9BFFEBFFA056FCF901E82AF7AD" author="Warren, L. M. &amp; Hutchings, P. A. &amp; Doyle, S." box="[660,884,1735,1761]" pageId="2" pageNumber="275" pagination="227 - 256" refId="ref9562" refString="Warren, L. M., Hutchings, P. A. &amp; Doyle, S. (1994) A revision of the genus Mediomastus Hartman, 1944 (Polychaeta: Capitellidae). Records of the Australian Museum, 46 (3), 227 - 256. https: // doi. org / 10.3853 / j. 0067 - 1975.46.1994.6" type="journal article" year="1994">
Warren
<emphasis id="9CF2BC78FFEBFFA0569AF901E879F7AD" box="[754,807,1735,1761]" italics="true" pageId="2" pageNumber="275">et al</emphasis>
. 1994
</bibRefCitation>
). It differs from
<taxonomicName id="69861BE9FFEBFFA05053F901EFBAF7AD" authorityName="Magalhães &amp; Lavesque &amp; Lamarque" authorityYear="2024" box="[1083,1252,1735,1761]" class="Polychaeta" family="Capitellidae" genus="Mediomastus" kingdom="Animalia" pageId="2" pageNumber="275" phylum="Annelida" rank="species" species="biscayensis" status="sp. nov.">
<emphasis id="9CF2BC78FFEBFFA05053F901EF0CF7AC" box="[1083,1106,1735,1760]" italics="true" pageId="2" pageNumber="275">M</emphasis>
.
<emphasis id="9CF2BC78FFEBFFA0500CF901EFBAF7AD" box="[1124,1252,1735,1761]" italics="true" pageId="2" pageNumber="275">biscayensis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="87C10103FFEBFFA05086F901EE16F7AD" box="[1262,1352,1735,1761]" pageId="2" pageNumber="275" rank="species">sp. nov.</taxonomicNameLabel>
in that the thoracic capillaries that are curved into minute hooks at tip (
<bibRefCitation id="CA171D9BFFEBFFA057E7F92DEF34F649" author="Warren, L. M. &amp; Hutchings, P. A. &amp; Doyle, S." box="[911,1130,1771,1797]" pageId="2" pageNumber="275" pagination="227 - 256" refId="ref9562" refString="Warren, L. M., Hutchings, P. A. &amp; Doyle, S. (1994) A revision of the genus Mediomastus Hartman, 1944 (Polychaeta: Capitellidae). Records of the Australian Museum, 46 (3), 227 - 256. https: // doi. org / 10.3853 / j. 0067 - 1975.46.1994.6" type="journal article" year="1994">
Warren
<emphasis id="9CF2BC78FFEBFFA05785F92DEF7FF649" box="[1005,1057,1771,1797]" italics="true" pageId="2" pageNumber="275">et al</emphasis>
. 1994
</bibRefCitation>
) whereas capillaries in
<taxonomicName id="69861BE9FFEBFFA05116F92DEA49F665" authorityName="Magalhães &amp; Lavesque &amp; Lamarque" authorityYear="2024" class="Polychaeta" family="Capitellidae" genus="Mediomastus" kingdom="Animalia" pageId="2" pageNumber="275" phylum="Annelida" rank="species" species="biscayensis" status="sp. nov.">
<emphasis id="9CF2BC78FFEBFFA05116F92DEECBF648" box="[1406,1429,1771,1796]" italics="true" pageId="2" pageNumber="275">M</emphasis>
.
<emphasis id="9CF2BC78FFEBFFA054FFF8C9EA49F665" box="[151,279,1807,1833]" italics="true" pageId="2" pageNumber="275">biscayensis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="87C10103FFEBFFA05576F8C9EA2BF665" box="[286,373,1807,1833]" pageId="2" pageNumber="275" rank="species">sp. nov.</taxonomicNameLabel>
are long and bilimbate, without curved hooked tips. The Methyl Green staining pattern is also distinct with a green band around the posterior half of chaetiger
<quantity id="697ECD8FFFEBFFA05714F8F5E8F7F601" box="[892,937,1843,1869]" metricMagnitude="-1" metricUnit="m" metricValue="2.286" pageId="2" pageNumber="275" unit="in" value="9.0">9 in</quantity>
<taxonomicName id="69861BE9FFEBFFA057DAF8F5EF64F600" authorityName="Day, Long" authorityYear="1961" box="[946,1082,1843,1868]" class="Polychaeta" family="Capitellidae" genus="Mediomastus" kingdom="Animalia" pageId="2" pageNumber="275" phylum="Annelida" rank="species" species="capensis">
<emphasis id="9CF2BC78FFEBFFA057DAF8F5EF64F600" box="[946,1082,1843,1868]" italics="true" pageId="2" pageNumber="275">M. capensis</emphasis>
</taxonomicName>
and a more intense staining in chaetigers 1011 than in
<taxonomicName id="69861BE9FFEBFFA055D3F891E93DF63D" authorityName="Magalhães &amp; Lavesque &amp; Lamarque" authorityYear="2024" box="[443,611,1879,1905]" class="Polychaeta" family="Capitellidae" genus="Mediomastus" kingdom="Animalia" pageId="2" pageNumber="275" phylum="Annelida" rank="species" species="biscayensis" status="sp. nov.">
<emphasis id="9CF2BC78FFEBFFA055D3F891EA8CF63C" box="[443,466,1879,1904]" italics="true" pageId="2" pageNumber="275">M</emphasis>
.
<emphasis id="9CF2BC78FFEBFFA0558BF891E93DF63D" box="[483,611,1879,1905]" italics="true" pageId="2" pageNumber="275">biscayensis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="87C10103FFEBFFA05605F891E999F63D" box="[621,711,1879,1905]" pageId="2" pageNumber="275" rank="species">sp. nov.</taxonomicNameLabel>
The European species
<taxonomicName id="69861BE9FFEBFFA057BDF891EF9BF63D" authorityName="Rasmussen" authorityYear="1973" box="[981,1221,1879,1905]" class="Polychaeta" family="Capitellidae" genus="Mediomastus" kingdom="Animalia" pageId="2" pageNumber="275" phylum="Annelida" rank="species" species="fragilis">
<emphasis id="9CF2BC78FFEBFFA057BDF891EF9BF63D" box="[981,1221,1879,1905]" italics="true" pageId="2" pageNumber="275">Mediomastus fragilis</emphasis>
</taxonomicName>
has records in the Mediterranean (
<bibRefCitation id="CA171D9BFFEBFFA05521F8BDE905F6D9" author="Capaccioni-Azzati, R." box="[329,603,1914,1941]" pageId="2" pageNumber="275" pagination="47 - 53" refId="ref7727" refString="Capaccioni-Azzati, R. (1985) Sobre la presencia de Mediomastus fragilis Rasmussen, 1973 (Polychaeta, Capitellidae) en el Mediterraneo. Investigaci 6 n Pesquera, 49, 47 - 53." type="journal article" year="1985">Capaccioni-Azzati 1985</bibRefCitation>
) and Bay of Biscay,
<collectingCountry id="D69120FAFFEBFFA0572DF8BDE8CFF6D9" box="[837,913,1915,1941]" name="France" pageId="2" pageNumber="275">France</collectingCountry>
(
<bibRefCitation id="CA171D9BFFEBFFA057F7F8BDEFE5F6D9" author="Bachelet, G. &amp; Dauvin, J. C." box="[927,1211,1915,1941]" pageId="2" pageNumber="275" pagination="83 - 97" refId="ref7599" refString="Bachelet, G. &amp; Dauvin, J. C. (1993) Distribution quantitative de la macrofaune benthique des sables intertidaux du bassin d'Arcachon. Oceanologica Acta, 16, 83 - 97." type="journal article" year="1993">Bachelet &amp; Dauvin 1993</bibRefCitation>
;
<bibRefCitation id="CA171D9BFFEBFFA050AFF8BDEA73F6F5" author="de Montaudouin, X. &amp; Sauriau, P. G." pageId="2" pageNumber="275" pagination="181 - 222" refId="ref9120" refString="de Montaudouin, X. &amp; Sauriau, P. G. (2000) Contribution to a synopsis of marine species richness in the Pertuis Charentais Sea with new insights in soft-bottom macrofauna of the Marennes-Oleron Bay. Cahiers de Biologie Marine, 41, 181 - 222." type="journal article" year="2000">de Montaudouin &amp; Sauriau 2000</bibRefCitation>
) but it is distinct from the new species by the presence of a small and rounded prostomium, chaetigers 10 and 11 transitional, thoracic hooks long and abdominal hooks short, and indistinct MGSP (
<bibRefCitation id="CA171D9BFFEBFFA050D8F805EED8F691" author="Warren, L. M. &amp; Hutchings, P. A. &amp; Doyle, S." box="[1200,1414,1987,2013]" pageId="2" pageNumber="275" pagination="227 - 256" refId="ref9562" refString="Warren, L. M., Hutchings, P. A. &amp; Doyle, S. (1994) A revision of the genus Mediomastus Hartman, 1944 (Polychaeta: Capitellidae). Records of the Australian Museum, 46 (3), 227 - 256. https: // doi. org / 10.3853 / j. 0067 - 1975.46.1994.6" type="journal article" year="1994">
Warren
<emphasis id="9CF2BC78FFEBFFA05163F805EE62F691" box="[1291,1340,1987,2013]" italics="true" pageId="2" pageNumber="275">et al</emphasis>
. 1994
</bibRefCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="E69C33E1FFEAFFA154AFFF51EF5DF1FD" box="[199,1027,151,177]" pageId="3" pageNumber="276" type="etymology">
<paragraph id="AE39606AFFEAFFA154AFFF51EF5DF1FD" blockId="3.[199,1027,151,285]" box="[199,1027,151,177]" pageId="3" pageNumber="276">
<emphasis id="9CF2BC78FFEAFFA154AFFF51EA10F1FD" bold="true" box="[199,334,151,177]" pageId="3" pageNumber="276">Etymology.</emphasis>
This species is described after its
<typeStatus id="713DDEC8FFEAFFA156A5FF51E9A3F1FD" box="[717,765,151,177]" pageId="3" pageNumber="276">type</typeStatus>
locality Bay of Biscay.
</paragraph>
</subSubSection>
<subSubSection id="E69C33E1FFEAFFA154AFFF7DE992F1B5" pageId="3" pageNumber="276" type="materials_examined">
<paragraph id="AE39606AFFEAFFA154AFFF7DE864F199" blockId="3.[199,1027,151,285]" box="[199,826,186,213]" pageId="3" pageNumber="276">
<materialsCitation id="1EEE6A37FFEAFFA154AFFF7DE868F199" ID-GBIF-Occurrence="4927504304" box="[199,822,186,213]" location="Bay of Biscay" municipality="West Gironde Mud Patch" pageId="3" pageNumber="276" specimenCount="1" typeStatus="holotype">
<emphasis id="9CF2BC78FFEAFFA154AFFF7DEA38F198" bold="true" box="[199,358,186,213]" pageId="3" pageNumber="276">
<typeStatus id="713DDEC8FFEAFFA154AFFF7DEA5CF199" box="[199,258,187,213]" pageId="3" pageNumber="276">Type</typeStatus>
locality.
</emphasis>
<location id="AB5936B1FFEAFFA15504FF7DE952F199" LSID="urn:lsid:plazi:treatment:262FD17CFFEBFFA154FFFE70E9AFF051:AB5936B1FFEAFFA15504FF7DE952F199" box="[364,524,187,213]" municipality="West Gironde Mud Patch" name="Bay of Biscay" pageId="3" pageNumber="276">Bay of Biscay</location>
,
<collectingMunicipality id="4E5DFA10FFEAFFA1567FFF7DE868F199" box="[535,822,187,213]" pageId="3" pageNumber="276">West Gironde Mud Patch</collectingMunicipality>
</materialsCitation>
.
</paragraph>
<paragraph id="AE39606AFFEAFFA154AFFF18E992F1B5" blockId="3.[199,1027,151,285]" box="[199,716,222,249]" pageId="3" pageNumber="276">
<emphasis id="9CF2BC78FFEAFFA154AFFF18EA74F1B4" bold="true" box="[199,298,222,248]" pageId="3" pageNumber="276">Habitat.</emphasis>
Muddy bottoms, around
<quantity id="697ECD8FFFEAFFA1562EFF19E921F1B5" box="[582,639,223,249]" metricMagnitude="1" metricUnit="m" metricValue="7.0" pageId="3" pageNumber="276" unit="m" value="70.0">70 m</quantity>
depth.
</paragraph>
</subSubSection>
<subSubSection id="E69C33E1FFEAFFA154AFFEC4E9AFF051" box="[199,753,258,285]" pageId="3" pageNumber="276" type="distribution">
<paragraph id="AE39606AFFEAFFA154AFFEC4E9AFF051" blockId="3.[199,1027,151,285]" box="[199,753,258,285]" pageId="3" pageNumber="276">
<emphasis id="9CF2BC78FFEAFFA154AFFEC4EA3FF050" bold="true" box="[199,353,258,284]" pageId="3" pageNumber="276">Distribution.</emphasis>
Known only from the
<typeStatus id="713DDEC8FFEAFFA15608FEC5E9CEF051" box="[608,656,259,285]" pageId="3" pageNumber="276">type</typeStatus>
locality.
</paragraph>
</subSubSection>
</treatment>
</document>