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<document id="FDFB2BD98DF4C0F091AD0970ED6C95D6" ID-DOI="10.3853/j.2201-4349.76.2024.1905" ID-ISSN="2201-4349" ID-Zenodo-Dep="14668975" IM.bibliography_approvedBy="felipe" IM.illustrations_approvedBy="felipe" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="GgImagineBatch" IM.taxonomicNames_approvedBy="felipe" IM.treatmentCitations_approvedBy="felipe" IM.treatments_approvedBy="felipe" checkinTime="1737003834830" checkinUser="felipe" docAuthor="Watson, Charlotte, Gunton, Laetitia M. &amp; Kupriyanova, Elena K." docDate="2024" docId="A17487D2FFC00A2BFEFBFB0CFB6EFE0F" docLanguage="en" docName="RecAustMus.76.5.249-264.pdf" docOrigin="Records of the Australian Museum 76 (5)" docSource="https://doi.org/10.3853/j.2201-4349.76.2024.1905" docStyle="DocumentStyle:997BA24B490466A2F99594A367FA147F.4:RecAustMus.2019-.journal_article.0cover" docStyleId="997BA24B490466A2F99594A367FA147F" docStyleName="RecAustMus.2019-.journal_article.0cover" docStyleVersion="4" docTitle="Pleijelius keni Watson, Gunton &amp; Kupriyanova, 2024, sp. nov." docType="treatment" docVersion="2" lastPageNumber="261" masterDocId="5D4DFFAAFFCA0A27FFC0FFF3FFE7FFFD" masterDocTitle="Three new species of bacterivorous Chrysopetalidae and Microphthalmidae (Annelida) inhabiting a whale fall off eastern Australia" masterLastPageNumber="264" masterPageNumber="249" pageNumber="259" updateTime="1737010517205" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-4.0">
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<mods:title id="99A3C0C99F8DEC78DE9992FD3E11843A">Three new species of bacterivorous Chrysopetalidae and Microphthalmidae (Annelida) inhabiting a whale fall off eastern Australia</mods:title>
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<mods:namePart id="28630A4A4E391227C6B8543EF87DB291">Watson, Charlotte</mods:namePart>
<mods:affiliation id="2E0612EB12B075038AD804D6B3A93B09">Museum and Art Gallery of the Northern Territory, Box 4646, Darwin, NT 0801, Australia</mods:affiliation>
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<mods:namePart id="16EF9B228E331932A59419022C91F82D">Gunton, Laetitia M.</mods:namePart>
<mods:affiliation id="FCAE411ED7463757C88D552DDABEAECB">School of the Environment and Life Sciences, University of Portsmouth, King Henry Building, Portsmouth PO 1 2 DY, United Kingdom</mods:affiliation>
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<mods:namePart id="63065A4E2B15BAEFBCDA9961637DC6B0">Kupriyanova, Elena K.</mods:namePart>
<mods:affiliation id="9253CE41D63AAEE1EB846D2BBFEED9B4">Australian Museum Research Institute, Australian Museum, 1 William Street, Sydney, NSW 2010, Australia &amp; School of Natural Sciences, Macquarie University, Sydney, NSW 2109, Australia</mods:affiliation>
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<mods:title id="48400A336A081D6432AFF64B3A4A7D4F">Records of the Australian Museum</mods:title>
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<mods:date id="7EC20A832FB3C17114D0C152B115CDD5">2024</mods:date>
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<treatment id="A17487D2FFC00A2BFEFBFB0CFB6EFE0F" LSID="urn:lsid:plazi:treatment:A17487D2FFC00A2BFEFBFB0CFB6EFE0F" httpUri="http://treatment.plazi.org/id/A17487D2FFC00A2BFEFBFB0CFB6EFE0F" lastPageId="12" lastPageNumber="261" pageId="10" pageNumber="259">
<subSubSection id="61C7654FFFC00A2DFEFBFB0CFD62FAE2" box="[315,645,1279,1311]" pageId="10" pageNumber="259" type="nomenclature">
<paragraph id="296236C4FFC00A2DFEFBFB0CFD62FAE2" blockId="10.[315,645,1279,1311]" box="[315,645,1279,1311]" pageId="10" pageNumber="259">
<heading id="722A81A8FFC00A2DFEFBFB0CFD62FAE2" bold="true" box="[315,645,1279,1311]" centered="true" fontSize="12" level="2" pageId="10" pageNumber="259" reason="2">
<emphasis id="1BA9EAD6FFC00A2DFEFBFB0CFD62FAE2" bold="true" box="[315,645,1279,1311]" pageId="10" pageNumber="259">
<taxonomicName id="EEDD4D47FFC00A2DFEFBFB0CFDECFAE3" authorityName="Watson &amp; Gunton &amp; Kupriyanova" authorityYear="2024" box="[315,523,1279,1310]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="10" pageNumber="259" phylum="Annelida" rank="species" species="keni" status="sp. nov.">
<emphasis id="1BA9EAD6FFC00A2DFEFBFB0CFDECFAE3" bold="true" box="[315,523,1279,1310]" italics="true" pageId="10" pageNumber="259">Pleijelius keni</emphasis>
</taxonomicName>
<taxonomicNameLabel id="009A57ADFFC00A2DFDD4FAF3FD62FAE2" box="[532,645,1280,1311]" pageId="10" pageNumber="259" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="61C7654FFFC00A2DFE63FACBFEB4FA0E" pageId="10" pageNumber="259" type="description">
<paragraph id="296236C4FFC00A2DFE63FACBFCEFFA8A" blockId="10.[419,542,1336,1363]" lastBlockId="10.[184,776,1381,1399]" pageId="10" pageNumber="259">
<figureCitation id="B1E62A41FFC00A2DFE63FACBFDF9FAAE" box="[419,542,1336,1363]" captionStart="Figure 4" captionStartId="11.[121,189,1673,1695]" captionTargetBox="[166,1376,151,1654]" captionTargetId="figure-90@11.[166,1376,151,1654]" captionTargetPageId="11" captionText="Figure 4. Pleijelius keni sp. nov. A, entire body, dorsal view; B, detail of anterior end, dorsal view; C, detail of anterior end, ventral view; D, neuropodium mid-body, ventral view; E, detail of falcigerous neurochaetae; F, detail of flattened and slenderer notochaetae. Abbreviations: ac anal cirri; la lateral antennae; p palps; achaetous segments I-III (note shorter ventral tentacular cirri on segment III), chaetigerous segment IV, ventral view; go - genital organ; sn - simple neurochaeta; vc - ventral cirrus." figureDoi="http://doi.org/10.5281/zenodo.14668983" httpUri="https://zenodo.org/record/14668983/files/figure.png" pageId="10" pageNumber="259">Fig. 4AE</figureCitation>
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urn:lsid:zoobank.org:act:
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<paragraph id="296236C4FFC00A2DFF05FA7EFE6CFA43" blockId="10.[197,763,1421,1523]" pageId="10" pageNumber="259">
<taxonomicName id="EEDD4D47FFC00A2DFF05FA7EFE65FA5F" authorityName="Salazar-Vallejo &amp; Orensanz" authorityYear="2006" box="[197,386,1421,1443]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" isUncertain="true" kingdom="Animalia" order="Phyllodocida" pageId="10" pageNumber="259" phylum="Annelida" rank="species" species="longae">
<emphasis id="1BA9EAD6FFC00A2DFF05FA7EFEC7FA5F" box="[197,288,1421,1442]" italics="true" pageId="10" pageNumber="259">Pleijelius</emphasis>
cf.
<emphasis id="1BA9EAD6FFC00A2DFE82FA7EFE65FA5F" box="[322,386,1421,1442]" italics="true" pageId="10" pageNumber="259">longae</emphasis>
</taxonomicName>
<emphasis id="1BA9EAD6FFC00A2DFE42FA7EFE78FA5F" box="[386,415,1421,1442]" italics="true" pageId="10" pageNumber="259">.—</emphasis>
<bibRefCitation id="4D4C4B35FFC00A2DFE5FFA7EFDBFFA5F" author="Gunton, L. M. &amp; E. K. Kupriyanova &amp; T. Alvestad &amp; L. Avery &amp; J. A. Blake &amp; O. Biriukova &amp; M. Boggemann &amp; P. Borisova &amp; N. Budaeva &amp; I. Burghardt &amp; M. Capa &amp; M. N. Georgieva &amp; C. J. Glasby &amp; P. W. Hsueh &amp; P. A. Hutchings &amp; N. Jimi &amp; J. A. Kongsrud &amp; J. Langeneck &amp; K. Meissner &amp; A. Murray &amp; M. Nikolic &amp; H. Paxton &amp; D. Ramos &amp; A. Schulze &amp; R. Sobczyk &amp; C. Watson &amp; H. Wiklund &amp; A. Zhadan &amp; J. Zhang" box="[415,600,1421,1443]" pageId="10" pageNumber="259" pagination="1 - 198" refId="ref11881" refString="Gunton, L. M., E. K. Kupriyanova, T. Alvestad, L. Avery, J. A. Blake, O. Biriukova, M. Boggemann, P. Borisova, N. Budaeva, I. Burghardt, M. Capa, M. N. Georgieva, C. J. Glasby, P. W. Hsueh, P. A. Hutchings, N. Jimi, J. A. Kongsrud, J. Langeneck, K. Meissner, A. Murray, M. Nikolic, H. Paxton, D. Ramos, A. Schulze, R. Sobczyk, C. Watson, H. Wiklund, A. Zhadan, and J. Zhang. 2021. Annelids of the eastern Australian abyss collected by the 2017 RV ' Investigator' voyage. Zookeys 1021: 1 - 198." type="journal article" year="2021">
Gunton
<emphasis id="1BA9EAD6FFC00A2DFE2CFA7DFDF2FA5F" box="[492,533,1421,1443]" italics="true" pageId="10" pageNumber="259">et al</emphasis>
., 2021
</bibRefCitation>
, SW Pacific, east coast of
<collectingCountry id="51CA7654FFC00A2DFEF3FA5BFE6CFA43" box="[307,395,1448,1470]" name="Australia" pageId="10" pageNumber="259">Australia</collectingCountry>
</paragraph>
<paragraph id="296236C4FFC00A2DFF05FA31FEB4FA0E" blockId="10.[197,763,1421,1523]" pageId="10" pageNumber="259">
<taxonomicName id="EEDD4D47FFC00A2DFF05FA31FEC7FA2A" authorityName="Salazar-Vallejo &amp; Orensanz" authorityYear="2006" box="[197,288,1474,1495]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="10" pageNumber="259" phylum="Annelida" rank="genus">
<emphasis id="1BA9EAD6FFC00A2DFF05FA31FEC7FA2A" box="[197,288,1474,1495]" italics="true" pageId="10" pageNumber="259">Pleijelius</emphasis>
</taxonomicName>
.—
<bibRefCitation id="4D4C4B35FFC00A2DFEFBFA31FDFEFA25" author="Georgieva, M. N. &amp; H. Wiklund &amp; D. A. Ramos &amp; L. Neal &amp; C. J. Glasby &amp; L. M. Gunton" box="[315,537,1474,1496]" pageId="10" pageNumber="259" pagination="167 - 213" refId="ref11763" refString="Georgieva, M. N., H. Wiklund, D. A. Ramos, L. Neal, C. J. Glasby, and L. M. Gunton. 2023. The annelid community of a natural deep-sea whale fall off Eastern Australia. Records of the Australian Museum 75 (3): 167 - 213." type="journal article" year="2023">
Georgieva
<emphasis id="1BA9EAD6FFC00A2DFE68FA30FE38FA2A" box="[424,479,1474,1496]" italics="true" pageId="10" pageNumber="259">et al.,</emphasis>
2023
</bibRefCitation>
, SW Pacific, east coast of
<collectingCountry id="51CA7654FFC00A2DFF3BFA2EFEB4FA0E" box="[251,339,1501,1523]" name="Australia" pageId="10" pageNumber="259">Australia</collectingCountry>
</paragraph>
</subSubSection>
<subSubSection id="61C7654FFFC00A2DFF66F9FBFBD0FF10" pageId="10" pageNumber="259" type="materials_examined">
<paragraph id="296236C4FFC00A2DFF66F9FBFE99F9DD" blockId="10.[166,382,1544,1568]" box="[166,382,1544,1568]" pageId="10" pageNumber="259">
<emphasis id="1BA9EAD6FFC00A2DFF66F9FBFE99F9DD" bold="true" box="[166,382,1544,1568]" pageId="10" pageNumber="259">Material examined</emphasis>
</paragraph>
<paragraph id="296236C4FFC00A2DFF66F9C5FCE9F996" blockId="10.[166,793,1590,1644]" pageId="10" pageNumber="259">
<materialsCitation id="99B53C99FFC00A2DFF66F9C5FCE9F996" collectionCode="AM" pageId="10" pageNumber="259" specimenCount="1" typeStatus="holotype">
<emphasis id="1BA9EAD6FFC00A2DFF66F9C5FEF2F9B3" bold="true" box="[166,277,1590,1614]" pageId="10" pageNumber="259">
<typeStatus id="F6668866FFC00A2DFF66F9C5FEF7F9B3" box="[166,272,1590,1614]" pageId="10" pageNumber="259" type="holotype">Holotype</typeStatus>
.
</emphasis>
<collectionCode id="4FCCAE01FFC00A2DFEDDF9C5FEAFF9B3" box="[285,328,1590,1614]" country="Australia" name="Australian Museum" pageId="10" pageNumber="259" type="Museum">AM</collectionCode>
W.51570, body nearly entire, 20 segments missing posterior-most segments, L:
<quantity id="EE259B21FFC00A2DFDF1F9A0FD62F996" box="[561,645,1619,1643]" metricMagnitude="-3" metricUnit="m" metricValue="2.3" pageId="10" pageNumber="259" unit="mm" value="2.3">2.3 mm</quantity>
, W:
<quantity id="EE259B21FFC00A2DFD75F9A0FCEDF996" box="[693,778,1619,1643]" metricMagnitude="-4" metricUnit="m" metricValue="7.0" pageId="10" pageNumber="259" unit="mm" value="0.7">0.7 mm</quantity>
.
</materialsCitation>
</paragraph>
<paragraph id="296236C4FFC00A2DFF66F972FE82F854" blockId="10.[166,795,1664,1961]" pageId="10" pageNumber="259">
<emphasis id="1BA9EAD6FFC00A2DFF66F972FEFBF965" bold="true" box="[166,284,1665,1689]" pageId="10" pageNumber="259">
<typeStatus id="F6668866FFC00A2DFF66F972FEF2F964" box="[166,277,1665,1689]" pageId="10" pageNumber="259" type="paratype">Paratypes</typeStatus>
.
</emphasis>
<collectionCode id="4FCCAE01FFC00A2DFEE0F972FEACF964" box="[288,331,1665,1689]" country="Australia" name="Australian Museum" pageId="10" pageNumber="259" type="Museum">AM</collectionCode>
W.55403;
<collectionCode id="4FCCAE01FFC00A2DFE78F972FDFFF964" box="[440,536,1665,1689]" country="Australia" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34986" lsid="urn:lsid:biocol.org:col:34986" name="Museum and Art Gallery of the Northern Territory" pageId="10" pageNumber="259" type="Museum">MAGNT</collectionCode>
W032914 (
<specimenCount id="3FDBFD4DFFC00A2DFD4EF972FCFEF964" box="[654,793,1665,1689]" count="16" pageId="10" pageNumber="259" type="generic">16 specimens</specimenCount>
of
<taxonomicName id="EEDD4D47FFC00A2DFF01F96DFEB3F94B" authorityName="Watson &amp; Gunton &amp; Kupriyanova" authorityYear="2024" box="[193,340,1694,1718]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="10" pageNumber="259" phylum="Annelida" rank="species" species="keni" status="sp. nov.">
<emphasis id="1BA9EAD6FFC00A2DFF01F96DFEB3F94B" box="[193,340,1694,1718]" italics="true" pageId="10" pageNumber="259">Pleijelius keni</emphasis>
</taxonomicName>
<taxonomicNameLabel id="009A57ADFFC00A2DFE99F96DFE4EF948" box="[345,425,1694,1717]" pageId="10" pageNumber="259" rank="species">sp. nov.</taxonomicNameLabel>
identified among a lot of
<taxonomicName id="EEDD4D47FFC00A2DFD6CF96DFEE4F92E" authorityName="Watson &amp; Gunton &amp; Kupriyanova" authorityYear="2024" class="Polychaeta" family="Chrysopetalidae" genus="Boudemos" kingdom="Animalia" order="Phyllodocida" pageId="10" pageNumber="259" phylum="Annelida" rank="species" species="paulinae" status="sp. nov.">
<emphasis id="1BA9EAD6FFC00A2DFD6CF96DFEE4F92E" italics="true" pageId="10" pageNumber="259">Boudemos paulinae</emphasis>
</taxonomicName>
<taxonomicNameLabel id="009A57ADFFC00A2DFEC8F94FFEBFF92E" box="[264,344,1724,1747]" pageId="10" pageNumber="259" rank="species">sp. nov.</taxonomicNameLabel>
NHM. 240A. Most specimens fragmented, few entire specimens fell into a similar size range of 25 segments with the greatest length
<quantity id="EE259B21FFC00A2DFDC5F90AFDA2F8ED" box="[517,581,1785,1809]" metricMagnitude="-3" metricUnit="m" metricValue="3.0" pageId="10" pageNumber="259" unit="mm" value="3.0">3 mm</quantity>
. Ovigerous females: 17NE, L:
<quantity id="EE259B21FFC00A2DFECCF8EAFEB9F8CD" box="[268,350,1817,1841]" metricMagnitude="-3" metricUnit="m" metricValue="1.6" pageId="10" pageNumber="259" unit="mm" value="1.6">1.6 mm</quantity>
, W:
<quantity id="EE259B21FFC00A2DFE4BF8EBFE3AF8CD" box="[395,477,1816,1840]" metricMagnitude="-4" metricUnit="m" metricValue="5.0" pageId="10" pageNumber="259" unit="mm" value="0.5">0.5 mm</quantity>
, oocytes visible from segment 7, mature eggs
<quantity id="EE259B21FFC00A2DFE88F8CAFE41F8AD" box="[328,422,1849,1873]" metricMagnitude="-5" metricUnit="m" metricValue="8.0" pageId="10" pageNumber="259" unit="mm" value="0.08">0.08 mm</quantity>
in diameter from segments 1317; 23E, L:
<quantity id="EE259B21FFC00A2DFF3EF8A5FEB5F890" box="[254,338,1878,1902]" metricMagnitude="-3" metricUnit="m" metricValue="1.8" pageId="10" pageNumber="259" unit="mm" value="1.8">1.8 mm</quantity>
, W:
<quantity id="EE259B21FFC00A2DFE43F8A5FE3EF890" box="[387,473,1878,1902]" metricMagnitude="-4" metricUnit="m" metricValue="6.0" pageId="10" pageNumber="259" unit="mm" value="0.6">0.6 mm</quantity>
; 23E, L:
<quantity id="EE259B21FFC00A2DFDFBF8A5FD68F890" box="[571,655,1878,1902]" metricMagnitude="-3" metricUnit="m" metricValue="2.9" pageId="10" pageNumber="259" unit="mm" value="2.9">2.9 mm</quantity>
, W:
<quantity id="EE259B21FFC00A2DFD00F8A5FCF1F890" box="[704,790,1878,1902]" metricMagnitude="-3" metricUnit="m" metricValue="1.1" pageId="10" pageNumber="259" unit="mm" value="1.1">1.1 mm</quantity>
; 25E, L: 3.0 mm, W:
<quantity id="EE259B21FFC00A2DFE4AF880FE07F876" box="[394,480,1907,1931]" metricMagnitude="-4" metricUnit="m" metricValue="8.0" pageId="10" pageNumber="259" unit="mm" value="0.8">0.8 mm</quantity>
. SEM specimen, 19E, L:
<quantity id="EE259B21FFC00A2DFD38F880FF35F855" metricMagnitude="-3" metricUnit="m" metricValue="1.6" pageId="10" pageNumber="259" unit="mm" value="1.6">1.6 mm</quantity>
, W:
<quantity id="EE259B21FFC00A2DFEC3F863FEBEF854" box="[259,345,1936,1961]" metricMagnitude="-4" metricUnit="m" metricValue="5.0" pageId="10" pageNumber="259" unit="mm" value="0.5">0.5 mm</quantity>
).
</paragraph>
<paragraph id="296236C4FFC00A2DFF66F84DFD3EF82B" blockId="10.[166,729,1982,2006]" box="[166,729,1982,2006]" pageId="10" pageNumber="259">
<emphasis id="1BA9EAD6FFC00A2DFF66F84DFEB5F82B" bold="true" box="[166,338,1982,2006]" pageId="10" pageNumber="259">DNA vouchers.</emphasis>
<collectionCode id="4FCCAE01FFC00A2DFE97F84DFE65F82B" box="[343,386,1982,2006]" country="Australia" name="Australian Museum" pageId="10" pageNumber="259" type="Museum">AM</collectionCode>
W.54809.001 and NHM_240A.
</paragraph>
<paragraph id="296236C4FFC00A2DFC87FF64FBD0FF10" blockId="10.[839,1467,151,237]" pageId="10" pageNumber="259">
<emphasis id="1BA9EAD6FFC00A2DFC87FF64FC39FF52" bold="true" box="[839,990,151,175]" pageId="10" pageNumber="259">Type locality.</emphasis>
A pilot whale skeleton off Byron Bay, NSW,
<collectingCountry id="51CA7654FFC00A2DFC87FF44FC4BFF32" box="[839,940,183,207]" name="Australia" pageId="10" pageNumber="259">Australia</collectingCountry>
. This is the first record for a
<taxonomicName id="EEDD4D47FFC00A2DFB25FF44FA79FF32" box="[1253,1438,183,207]" pageId="10" pageNumber="259">
<emphasis id="1BA9EAD6FFC00A2DFB25FF44FAADFF32" box="[1253,1354,183,207]" italics="true" pageId="10" pageNumber="259">Pleijelius</emphasis>
species
</taxonomicName>
in the SW Pacific Ocean.
</paragraph>
</subSubSection>
<subSubSection id="61C7654FFFC00A2BFC87FEF1FD69FD68" lastPageId="12" lastPageNumber="261" pageId="10" pageNumber="259" type="description">
<paragraph id="296236C4FFC00A2DFC87FEF1FC39FCD7" blockId="10.[839,1467,258,2009]" pageId="10" pageNumber="259">
<emphasis id="1BA9EAD6FFC00A2DFC87FEF1FC35FEE7" bold="true" box="[839,978,258,282]" pageId="10" pageNumber="259">Description.</emphasis>
Body elongate, segments with poorly defined segmental lines dorsally (
<figureCitation id="B1E62A41FFC00A2DFBAEFEECFB0BFECA" box="[1134,1260,287,311]" captionStart="Figure 4" captionStartId="11.[121,189,1673,1695]" captionTargetBox="[166,1376,151,1654]" captionTargetId="figure-90@11.[166,1376,151,1654]" captionTargetPageId="11" captionText="Figure 4. Pleijelius keni sp. nov. A, entire body, dorsal view; B, detail of anterior end, dorsal view; C, detail of anterior end, ventral view; D, neuropodium mid-body, ventral view; E, detail of falcigerous neurochaetae; F, detail of flattened and slenderer notochaetae. Abbreviations: ac anal cirri; la lateral antennae; p palps; achaetous segments I-III (note shorter ventral tentacular cirri on segment III), chaetigerous segment IV, ventral view; go - genital organ; sn - simple neurochaeta; vc - ventral cirrus." figureDoi="http://doi.org/10.5281/zenodo.14668983" httpUri="https://zenodo.org/record/14668983/files/figure.png" pageId="10" pageNumber="259">Fig. 4AB</figureCitation>
); pale buff colour with no obvious pigmentation in preserved specimens. Dense, relatively short length, spinous, whitish coloured, notochaetal fascicles, originating dorso-laterally, leaving mid-dorsum bare. Prostomium rectangular to sub-trapezoidal shape, broader than long, with rounded corners. Prostomium not defined dorsally or ventrally by external segmental lines; first ventral segmental line includes segment I (
<figureCitation id="B1E62A41FFC00A2DFA50FE1FFC8DFDDF" captionStart="Figure 4" captionStartId="11.[121,189,1673,1695]" captionTargetBox="[166,1376,151,1654]" captionTargetId="figure-90@11.[166,1376,151,1654]" captionTargetPageId="11" captionText="Figure 4. Pleijelius keni sp. nov. A, entire body, dorsal view; B, detail of anterior end, dorsal view; C, detail of anterior end, ventral view; D, neuropodium mid-body, ventral view; E, detail of falcigerous neurochaetae; F, detail of flattened and slenderer notochaetae. Abbreviations: ac anal cirri; la lateral antennae; p palps; achaetous segments I-III (note shorter ventral tentacular cirri on segment III), chaetigerous segment IV, ventral view; go - genital organ; sn - simple neurochaeta; vc - ventral cirrus." figureDoi="http://doi.org/10.5281/zenodo.14668983" httpUri="https://zenodo.org/record/14668983/files/figure.png" pageId="10" pageNumber="259">Fig. 4C</figureCitation>
). Digitiform median antenna arising at posterior-most margin of prostomium at mid-dorsal position on prostomium (
<figureCitation id="B1E62A41FFC00A2DFC8FFDB7FC21FDA0" box="[847,966,580,605]" captionStart="Figure 4" captionStartId="11.[121,189,1673,1695]" captionTargetBox="[166,1376,151,1654]" captionTargetId="figure-90@11.[166,1376,151,1654]" captionTargetPageId="11" captionText="Figure 4. Pleijelius keni sp. nov. A, entire body, dorsal view; B, detail of anterior end, dorsal view; C, detail of anterior end, ventral view; D, neuropodium mid-body, ventral view; E, detail of falcigerous neurochaetae; F, detail of flattened and slenderer notochaetae. Abbreviations: ac anal cirri; la lateral antennae; p palps; achaetous segments I-III (note shorter ventral tentacular cirri on segment III), chaetigerous segment IV, ventral view; go - genital organ; sn - simple neurochaeta; vc - ventral cirrus." figureDoi="http://doi.org/10.5281/zenodo.14668983" httpUri="https://zenodo.org/record/14668983/files/figure.png" pageId="10" pageNumber="259">Fig. 4AB</figureCitation>
); pair of cirriform lateral antennae inserted on anterior prostomial margin (
<figureCitation id="B1E62A41FFC00A2DFB41FD91FB3EFD87" box="[1153,1241,610,634]" captionStart="Figure 4" captionStartId="11.[121,189,1673,1695]" captionTargetBox="[166,1376,151,1654]" captionTargetId="figure-90@11.[166,1376,151,1654]" captionTargetPageId="11" captionText="Figure 4. Pleijelius keni sp. nov. A, entire body, dorsal view; B, detail of anterior end, dorsal view; C, detail of anterior end, ventral view; D, neuropodium mid-body, ventral view; E, detail of falcigerous neurochaetae; F, detail of flattened and slenderer notochaetae. Abbreviations: ac anal cirri; la lateral antennae; p palps; achaetous segments I-III (note shorter ventral tentacular cirri on segment III), chaetigerous segment IV, ventral view; go - genital organ; sn - simple neurochaeta; vc - ventral cirrus." figureDoi="http://doi.org/10.5281/zenodo.14668983" httpUri="https://zenodo.org/record/14668983/files/figure.png" pageId="10" pageNumber="259">Fig. 4C</figureCitation>
). Palps inserted just behind former at level of ventral tentacular cirri of segment I; palps same size to slightly shorter than lateral antennae and positioned adjacent level to ventral tentacular cirri of segment I (
<figureCitation id="B1E62A41FFC00A2DFC78FD24FBEEFD12" box="[952,1033,727,751]" captionStart="Figure 4" captionStartId="11.[121,189,1673,1695]" captionTargetBox="[166,1376,151,1654]" captionTargetId="figure-90@11.[166,1376,151,1654]" captionTargetPageId="11" captionText="Figure 4. Pleijelius keni sp. nov. A, entire body, dorsal view; B, detail of anterior end, dorsal view; C, detail of anterior end, ventral view; D, neuropodium mid-body, ventral view; E, detail of falcigerous neurochaetae; F, detail of flattened and slenderer notochaetae. Abbreviations: ac anal cirri; la lateral antennae; p palps; achaetous segments I-III (note shorter ventral tentacular cirri on segment III), chaetigerous segment IV, ventral view; go - genital organ; sn - simple neurochaeta; vc - ventral cirrus." figureDoi="http://doi.org/10.5281/zenodo.14668983" httpUri="https://zenodo.org/record/14668983/files/figure.png" pageId="10" pageNumber="259">Fig. 4C</figureCitation>
). No discreet palphore in most specimens, sometimes faint fold present. Eyes absent. Nuchal organs not discerned.
</paragraph>
<paragraph id="296236C4FFC00A2DFCA5FCC3FA50FC62" blockId="10.[839,1467,258,2009]" pageId="10" pageNumber="259">Large robust muscular pharynx extends to around segment VII. Mouth papillae cirrus-like with rounded bases, cirriform distally; some may be a more cushion-like shape. Mouth papillae number 10, visible when mouth everted. No jaws.</paragraph>
<paragraph id="296236C4FFC00A2DFCA5FC56FB3CFB91" blockId="10.[839,1467,258,2009]" pageId="10" pageNumber="259">
Segments IIII lacking podia and chaetae, each segment with two pairs tentacular cirri; total six pairs. Dorsal cirri on segments I-III long, slender, faintly segmented with subconical base not defined cirrophores; ventral cirri shorter than dorsal, particularly on segments I and III (
<figureCitation id="B1E62A41FFC00A2DFB33FBE9FAA4FBCF" box="[1267,1347,1050,1074]" captionStart="Figure 4" captionStartId="11.[121,189,1673,1695]" captionTargetBox="[166,1376,151,1654]" captionTargetId="figure-90@11.[166,1376,151,1654]" captionTargetPageId="11" captionText="Figure 4. Pleijelius keni sp. nov. A, entire body, dorsal view; B, detail of anterior end, dorsal view; C, detail of anterior end, ventral view; D, neuropodium mid-body, ventral view; E, detail of falcigerous neurochaetae; F, detail of flattened and slenderer notochaetae. Abbreviations: ac anal cirri; la lateral antennae; p palps; achaetous segments I-III (note shorter ventral tentacular cirri on segment III), chaetigerous segment IV, ventral view; go - genital organ; sn - simple neurochaeta; vc - ventral cirrus." figureDoi="http://doi.org/10.5281/zenodo.14668983" httpUri="https://zenodo.org/record/14668983/files/figure.png" pageId="10" pageNumber="259">Fig. 4C</figureCitation>
). Biramous podia with notochaetae and neurochaetae start segment IV (
<figureCitation id="B1E62A41FFC00A2DFC8FFBA7FC27FB90" box="[847,960,1108,1133]" captionStart="Figure 4" captionStartId="11.[121,189,1673,1695]" captionTargetBox="[166,1376,151,1654]" captionTargetId="figure-90@11.[166,1376,151,1654]" captionTargetPageId="11" captionText="Figure 4. Pleijelius keni sp. nov. A, entire body, dorsal view; B, detail of anterior end, dorsal view; C, detail of anterior end, ventral view; D, neuropodium mid-body, ventral view; E, detail of falcigerous neurochaetae; F, detail of flattened and slenderer notochaetae. Abbreviations: ac anal cirri; la lateral antennae; p palps; achaetous segments I-III (note shorter ventral tentacular cirri on segment III), chaetigerous segment IV, ventral view; go - genital organ; sn - simple neurochaeta; vc - ventral cirrus." figureDoi="http://doi.org/10.5281/zenodo.14668983" httpUri="https://zenodo.org/record/14668983/files/figure.png" pageId="10" pageNumber="259">Fig. 4BC</figureCitation>
) and continue down body.
</paragraph>
<paragraph id="296236C4FFC00A2DFCA5FB83FC37FA78" blockId="10.[839,1467,258,2009]" pageId="10" pageNumber="259">
Mid-body notopodia shallow mounds with fascicle of spinous notochaetae spread out in fan-like arrangement with shorter spines on inner side of whorl and longer spines in central part (
<figureCitation id="B1E62A41FFC00A2DFC12FB37FBCEFB20" box="[978,1065,1220,1245]" captionStart="Figure 4" captionStartId="11.[121,189,1673,1695]" captionTargetBox="[166,1376,151,1654]" captionTargetId="figure-90@11.[166,1376,151,1654]" captionTargetPageId="11" captionText="Figure 4. Pleijelius keni sp. nov. A, entire body, dorsal view; B, detail of anterior end, dorsal view; C, detail of anterior end, ventral view; D, neuropodium mid-body, ventral view; E, detail of falcigerous neurochaetae; F, detail of flattened and slenderer notochaetae. Abbreviations: ac anal cirri; la lateral antennae; p palps; achaetous segments I-III (note shorter ventral tentacular cirri on segment III), chaetigerous segment IV, ventral view; go - genital organ; sn - simple neurochaeta; vc - ventral cirrus." figureDoi="http://doi.org/10.5281/zenodo.14668983" httpUri="https://zenodo.org/record/14668983/files/figure.png" pageId="10" pageNumber="259">Fig. 4B</figureCitation>
). Notochaetae number 2030, spines slightly curved, relatively short in length, shaft may have minute scattered tubercules but distal half to third with the outer margin denticulate composed of two densely close rows of rectangular-shaped teeth extending to distinctive, slightly expanded, truncate, perhaps slightly excavate, distal tip (
<figureCitation id="B1E62A41FFC00A2DFCB2FA9FFC24FA78" box="[882,963,1388,1413]" captionStart="Figure 4" captionStartId="11.[121,189,1673,1695]" captionTargetBox="[166,1376,151,1654]" captionTargetId="figure-90@11.[166,1376,151,1654]" captionTargetPageId="11" captionText="Figure 4. Pleijelius keni sp. nov. A, entire body, dorsal view; B, detail of anterior end, dorsal view; C, detail of anterior end, ventral view; D, neuropodium mid-body, ventral view; E, detail of falcigerous neurochaetae; F, detail of flattened and slenderer notochaetae. Abbreviations: ac anal cirri; la lateral antennae; p palps; achaetous segments I-III (note shorter ventral tentacular cirri on segment III), chaetigerous segment IV, ventral view; go - genital organ; sn - simple neurochaeta; vc - ventral cirrus." figureDoi="http://doi.org/10.5281/zenodo.14668983" httpUri="https://zenodo.org/record/14668983/files/figure.png" pageId="10" pageNumber="259">Fig. 4F</figureCitation>
).
</paragraph>
<paragraph id="296236C4FFC00A2DFCA5FA7BFC36F9EC" blockId="10.[839,1467,258,2009]" pageId="10" pageNumber="259">
Robust, medium-length dorsal cirri from segment IV, with broad bases, narrowing to cirriform tip, not extending in length beyond notochaetal fascicle. Dorsal cirri smooth not articulated, not alternating in size or position down body (
<figureCitation id="B1E62A41FFC00A2DFC8FFA0BFC22F9EC" box="[847,965,1528,1553]" captionStart="Figure 4" captionStartId="11.[121,189,1673,1695]" captionTargetBox="[166,1376,151,1654]" captionTargetId="figure-90@11.[166,1376,151,1654]" captionTargetPageId="11" captionText="Figure 4. Pleijelius keni sp. nov. A, entire body, dorsal view; B, detail of anterior end, dorsal view; C, detail of anterior end, ventral view; D, neuropodium mid-body, ventral view; E, detail of falcigerous neurochaetae; F, detail of flattened and slenderer notochaetae. Abbreviations: ac anal cirri; la lateral antennae; p palps; achaetous segments I-III (note shorter ventral tentacular cirri on segment III), chaetigerous segment IV, ventral view; go - genital organ; sn - simple neurochaeta; vc - ventral cirrus." figureDoi="http://doi.org/10.5281/zenodo.14668983" httpUri="https://zenodo.org/record/14668983/files/figure.png" pageId="10" pageNumber="259">Fig. 4AB</figureCitation>
).
</paragraph>
<paragraph id="296236C4FFC00A2DFCA5F9E5FA5CF824" blockId="10.[839,1467,258,2009]" pageId="10" pageNumber="259">
Neuropodia composed of anterior elongate lobe and posterior more truncate lobe; large, rounded glands posterior to latter neuropodial lobe (
<figureCitation id="B1E62A41FFC00A2DFBB7F9A5FB34F993" box="[1143,1235,1622,1646]" captionStart="Figure 4" captionStartId="11.[121,189,1673,1695]" captionTargetBox="[166,1376,151,1654]" captionTargetId="figure-90@11.[166,1376,151,1654]" captionTargetPageId="11" captionText="Figure 4. Pleijelius keni sp. nov. A, entire body, dorsal view; B, detail of anterior end, dorsal view; C, detail of anterior end, ventral view; D, neuropodium mid-body, ventral view; E, detail of falcigerous neurochaetae; F, detail of flattened and slenderer notochaetae. Abbreviations: ac anal cirri; la lateral antennae; p palps; achaetous segments I-III (note shorter ventral tentacular cirri on segment III), chaetigerous segment IV, ventral view; go - genital organ; sn - simple neurochaeta; vc - ventral cirrus." figureDoi="http://doi.org/10.5281/zenodo.14668983" httpUri="https://zenodo.org/record/14668983/files/figure.png" pageId="10" pageNumber="259">Fig. 4D</figureCitation>
). Two neuroaciculae present: very slender, pale, superior acicula present at the end of anterior pointed lobe; longer, brown, robust acicula ending mid-way in posterior neuropodial lobe. In one neuropodium of
<specimenCount id="3FDBFD4DFFC00A2DFBC1F925FB7FF913" box="[1025,1176,1750,1774]" count="1" pageId="10" pageNumber="259" type="generic">one specimen</specimenCount>
a single, simple, hookedshaped, slender acicular spine, parallel to but separate from a robust lower acicula, present and very hard to discern. Ventral cirri composed of broad rounded base and shorter, less broad distal part; almost globularlike in anterior segments becoming more elongate in posterior segments. Ventral cirri mid-body about half to two-thirds length of neuropodial lobe. Ventral cirri inserted on lower edge of ventral ramus immediately posterior to neurochaetal fascicle (
<figureCitation id="B1E62A41FFC00A2DFAF7F833FA49F824" box="[1335,1454,1984,2009]" captionStart="Figure 4" captionStartId="11.[121,189,1673,1695]" captionTargetBox="[166,1376,151,1654]" captionTargetId="figure-90@11.[166,1376,151,1654]" captionTargetPageId="11" captionText="Figure 4. Pleijelius keni sp. nov. A, entire body, dorsal view; B, detail of anterior end, dorsal view; C, detail of anterior end, ventral view; D, neuropodium mid-body, ventral view; E, detail of falcigerous neurochaetae; F, detail of flattened and slenderer notochaetae. Abbreviations: ac anal cirri; la lateral antennae; p palps; achaetous segments I-III (note shorter ventral tentacular cirri on segment III), chaetigerous segment IV, ventral view; go - genital organ; sn - simple neurochaeta; vc - ventral cirrus." figureDoi="http://doi.org/10.5281/zenodo.14668983" httpUri="https://zenodo.org/record/14668983/files/figure.png" pageId="10" pageNumber="259">Fig. 4C D</figureCitation>
).
</paragraph>
<caption id="7DA2664CFFC10A2CFFB9F97AFBABF90D" ID-DOI="http://doi.org/10.5281/zenodo.14668983" ID-Zenodo-Dep="14668983" httpUri="https://zenodo.org/record/14668983/files/figure.png" pageId="11" pageNumber="260" startId="11.[121,189,1673,1695]" targetBox="[166,1376,151,1654]" targetPageId="11" targetType="figure">
<paragraph id="296236C4FFC10A2CFFB9F97AFBABF90D" blockId="11.[121,1422,1673,1776]" pageId="11" pageNumber="260">
<emphasis id="1BA9EAD6FFC10A2CFFB9F97AFF37F963" bold="true" box="[121,208,1673,1695]" pageId="11" pageNumber="260">Figure 4</emphasis>
.
<taxonomicName id="EEDD4D47FFC10A2CFF1EF979FE8FF962" authorityName="Watson &amp; Gunton &amp; Kupriyanova" authorityYear="2024" box="[222,360,1674,1695]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="11" pageNumber="260" phylum="Annelida" rank="species" species="keni" status="sp. nov.">
<emphasis id="1BA9EAD6FFC10A2CFF1EF979FE8FF962" box="[222,360,1674,1695]" italics="true" pageId="11" pageNumber="260">Pleijelius keni</emphasis>
</taxonomicName>
<taxonomicNameLabel id="009A57ADFFC10A2CFEB0F979FE5BF962" box="[368,444,1674,1695]" pageId="11" pageNumber="260" rank="species">sp. nov.</taxonomicNameLabel>
A, entire body, dorsal view; B, detail of anterior end, dorsal view; C, detail of anterior end, ventral view; D, neuropodium mid-body, ventral view; E, detail of falcigerous neurochaetae; F, detail of flattened and slenderer notochaetae. Abbreviations: ac anal cirri; la lateral antennae; p palps; achaetous segments I-III (note shorter ventral tentacular cirri on segment III), chaetigerous segment IV, ventral view; go - genital organ; sn - simple neurochaeta; vc - ventral cirrus.
</paragraph>
</caption>
<paragraph id="296236C4FFC10A2CFF57F8D3FC3CF853" blockId="11.[121,749,1824,1995]" lastBlockId="11.[794,1422,1824,1995]" pageId="11" pageNumber="260">
Neurochaetal fascicle composed of superior long shafted falcigers with longer blades more directed upwards, number &lt;5; mid and posterior group of unidentate falcigers with medium to shorter length serrate blades, number 1215 (
<figureCitation id="B1E62A41FFC10A2CFF41F865FF1BF853" box="[129,252,1942,1966]" captionStart="Figure 4" captionStartId="11.[121,189,1673,1695]" captionTargetBox="[166,1376,151,1654]" captionTargetId="figure-90@11.[166,1376,151,1654]" captionTargetPageId="11" captionText="Figure 4. Pleijelius keni sp. nov. A, entire body, dorsal view; B, detail of anterior end, dorsal view; C, detail of anterior end, ventral view; D, neuropodium mid-body, ventral view; E, detail of falcigerous neurochaetae; F, detail of flattened and slenderer notochaetae. Abbreviations: ac anal cirri; la lateral antennae; p palps; achaetous segments I-III (note shorter ventral tentacular cirri on segment III), chaetigerous segment IV, ventral view; go - genital organ; sn - simple neurochaeta; vc - ventral cirrus." figureDoi="http://doi.org/10.5281/zenodo.14668983" httpUri="https://zenodo.org/record/14668983/files/figure.png" pageId="11" pageNumber="260">Fig. 4D E</figureCitation>
). Superior-most neurochaetae with 12 simple neurochaetae positioned above the superior slender acicula, slightly curved with blade-like distal tip bearing tiny spinelets on concave edge (
<figureCitation id="B1E62A41FFC10A2CFB85F8CDFB7BF8AB" box="[1093,1180,1854,1878]" captionStart="Figure 4" captionStartId="11.[121,189,1673,1695]" captionTargetBox="[166,1376,151,1654]" captionTargetId="figure-90@11.[166,1376,151,1654]" captionTargetPageId="11" captionText="Figure 4. Pleijelius keni sp. nov. A, entire body, dorsal view; B, detail of anterior end, dorsal view; C, detail of anterior end, ventral view; D, neuropodium mid-body, ventral view; E, detail of falcigerous neurochaetae; F, detail of flattened and slenderer notochaetae. Abbreviations: ac anal cirri; la lateral antennae; p palps; achaetous segments I-III (note shorter ventral tentacular cirri on segment III), chaetigerous segment IV, ventral view; go - genital organ; sn - simple neurochaeta; vc - ventral cirrus." figureDoi="http://doi.org/10.5281/zenodo.14668983" httpUri="https://zenodo.org/record/14668983/files/figure.png" pageId="11" pageNumber="260">Fig. 4D</figureCitation>
); simple neurochaetae may present in other fascicle positions. Neurochaetae with bidentate shafts. Internal cameration absent in notochaetae and neurochaetae.
</paragraph>
<paragraph id="296236C4FFC10A2BFCF8F840FD47FF17" blockId="11.[794,1422,1824,1995]" lastBlockId="12.[166,794,151,234]" lastPageId="12" lastPageNumber="261" pageId="11" pageNumber="260">
Nearly all specimens missing posterior-most segments. Entire pygidium comprising two robust, long, dorso-lateral anal cirri and a single anal cirrus originating ventrally, about quarter the length of lateral anal cirri (
<figureCitation id="B1E62A41FFC60A2BFDFDFF21FD73FF17" box="[573,660,210,234]" captionStart="Figure 4" captionStartId="11.[121,189,1673,1695]" captionTargetBox="[166,1376,151,1654]" captionTargetId="figure-90@11.[166,1376,151,1654]" captionTargetPageId="11" captionText="Figure 4. Pleijelius keni sp. nov. A, entire body, dorsal view; B, detail of anterior end, dorsal view; C, detail of anterior end, ventral view; D, neuropodium mid-body, ventral view; E, detail of falcigerous neurochaetae; F, detail of flattened and slenderer notochaetae. Abbreviations: ac anal cirri; la lateral antennae; p palps; achaetous segments I-III (note shorter ventral tentacular cirri on segment III), chaetigerous segment IV, ventral view; go - genital organ; sn - simple neurochaeta; vc - ventral cirrus." figureDoi="http://doi.org/10.5281/zenodo.14668983" httpUri="https://zenodo.org/record/14668983/files/figure.png" pageId="12" pageNumber="261">Fig. 4A</figureCitation>
).
</paragraph>
<paragraph id="296236C4FFC60A2BFF66FF0CFD69FD68" blockId="12.[166,795,255,661]" pageId="12" pageNumber="261">
<emphasis id="1BA9EAD6FFC60A2BFF66FF0CFE3BFEE5" bold="true" box="[166,476,255,280]" pageId="12" pageNumber="261">Reproductive morphology</emphasis>
. Gametes were observed in a nearly entire individual of 17 segments, only missing the posterior end. Large, rounded swollen ventral pads are evident from segment IV. Smaller rounded, swollen structures interpreted as external genital organs are positioned ventrally; they bulge out in between the inferior edge of the neuropodia and ventral cirri and are just visible from segment VII and very clearly present from segments IX, X (
<figureCitation id="B1E62A41FFC60A2BFF38FE19FEB4FDFF" box="[248,339,490,514]" captionStart="Figure 4" captionStartId="11.[121,189,1673,1695]" captionTargetBox="[166,1376,151,1654]" captionTargetId="figure-90@11.[166,1376,151,1654]" captionTargetPageId="11" captionText="Figure 4. Pleijelius keni sp. nov. A, entire body, dorsal view; B, detail of anterior end, dorsal view; C, detail of anterior end, ventral view; D, neuropodium mid-body, ventral view; E, detail of falcigerous neurochaetae; F, detail of flattened and slenderer notochaetae. Abbreviations: ac anal cirri; la lateral antennae; p palps; achaetous segments I-III (note shorter ventral tentacular cirri on segment III), chaetigerous segment IV, ventral view; go - genital organ; sn - simple neurochaeta; vc - ventral cirrus." figureDoi="http://doi.org/10.5281/zenodo.14668983" httpUri="https://zenodo.org/record/14668983/files/figure.png" pageId="12" pageNumber="261">Fig. 4D</figureCitation>
). These appear glandular in function and contain multiple, very small, rounded, dark blackberry shapes indicative of sperm. Smaller oocytes were visible through the ventral body wall with larger oocytes (
<quantity id="EE259B21FFC60A2BFD7AFDB1FCFEFDA7" box="[698,793,578,602]" metricMagnitude="-5" metricUnit="m" metricValue="4.0" pageId="12" pageNumber="261" unit="mm" value="0.04">0.04 mm</quantity>
in diameter) present from segment XII to segment XVII. No external penes or copulatory stylets observed.
</paragraph>
</subSubSection>
<subSubSection id="61C7654FFFC60A2BFF66FD59FEE5FCA8" pageId="12" pageNumber="261" type="etymology">
<paragraph id="296236C4FFC60A2BFF66FD59FEE5FCA8" blockId="12.[166,795,682,853]" pageId="12" pageNumber="261">
<emphasis id="1BA9EAD6FFC60A2BFF66FD59FECDFD3F" bold="true" box="[166,298,682,706]" pageId="12" pageNumber="261">Etymology.</emphasis>
<taxonomicName id="EEDD4D47FFC60A2BFEF4FD59FE35FD3F" authorityName="Watson &amp; Gunton &amp; Kupriyanova" authorityYear="2024" box="[308,466,682,706]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="12" pageNumber="261" phylum="Annelida" rank="species" species="keni" status="sp. nov.">
<emphasis id="1BA9EAD6FFC60A2BFEF4FD59FE35FD3F" box="[308,466,682,706]" italics="true" pageId="12" pageNumber="261">Pleijelius keni</emphasis>
</taxonomicName>
<taxonomicNameLabel id="009A57ADFFC60A2BFE1CFD58FDD2FD3F" box="[476,565,683,706]" pageId="12" pageNumber="261" rank="species">sp. nov.</taxonomicNameLabel>
is named in honour of the first authors father, Kenneth Watson, who imbued his daughter with a love of nature and scientific curiosity. His ashes are spread at sea offshore from Byron Bay in the vicinity of the whale fall and the abundant life cycle it sustains.
</paragraph>
</subSubSection>
<subSubSection id="61C7654FFFC60A2BFF66FC99FB6EFE0F" pageId="12" pageNumber="261" type="diagnosis">
<paragraph id="296236C4FFC60A2BFF66FC99FEE1FC40" blockId="12.[166,794,874,957]" pageId="12" pageNumber="261">
<emphasis id="1BA9EAD6FFC60A2BFF66FC99FEF3FC7F" bold="true" box="[166,276,874,898]" pageId="12" pageNumber="261">Diagnosis</emphasis>
. Notochaetae with two rows of densely serrate margins positioned close together; serrations are rectangular in shape.
</paragraph>
<paragraph id="296236C4FFC60A2BFF66FC21FE32FAD0" blockId="12.[166,798,978,1999]" pageId="12" pageNumber="261">
<emphasis id="1BA9EAD6FFC60A2BFF66FC21FE6DFC17" bold="true" box="[166,394,978,1002]" pageId="12" pageNumber="261">Diagnostic remarks.</emphasis>
The morphology of
<taxonomicName id="EEDD4D47FFC60A2BFDA0FC21FD11FC17" authorityName="Watson &amp; Gunton &amp; Kupriyanova" authorityYear="2024" box="[608,758,978,1002]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="12" pageNumber="261" phylum="Annelida" rank="species" species="keni" status="sp. nov.">
<emphasis id="1BA9EAD6FFC60A2BFDA0FC21FD11FC17" box="[608,758,978,1002]" italics="true" pageId="12" pageNumber="261">Pleijelius keni</emphasis>
</taxonomicName>
<taxonomicNameLabel id="009A57ADFFC60A2BFD3AFC20FF33FBFA" pageId="12" pageNumber="261" rank="species">sp. nov.</taxonomicNameLabel>
and
<taxonomicName id="EEDD4D47FFC60A2BFEC9FC03FE8AFBFA" authorityName="Salazar-Vallejo &amp; Orensanz" authorityYear="2006" box="[265,365,1007,1031]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="12" pageNumber="261" phylum="Annelida" rank="species" species="longae">
<emphasis id="1BA9EAD6FFC60A2BFEC9FC03FE8AFBFA" box="[265,365,1007,1031]" italics="true" pageId="12" pageNumber="261">P. longae</emphasis>
</taxonomicName>
is similar, including length and number of segments:
<taxonomicName id="EEDD4D47FFC60A2BFEF6FBFDFE99FBD8" authorityName="Watson &amp; Gunton &amp; Kupriyanova" authorityYear="2024" box="[310,382,1037,1061]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="12" pageNumber="261" phylum="Annelida" rank="species" species="keni" status="sp. nov.">
<emphasis id="1BA9EAD6FFC60A2BFEF6FBFDFE99FBD8" box="[310,382,1037,1061]" italics="true" pageId="12" pageNumber="261">P. keni</emphasis>
</taxonomicName>
<taxonomicNameLabel id="009A57ADFFC60A2BFE47FBFEFE3CFBD8" box="[391,475,1037,1061]" pageId="12" pageNumber="261" rank="species">sp. nov.</taxonomicNameLabel>
~
<quantity id="EE259B21FFC60A2BFE31FBFEFDC8FBD9" box="[497,559,1037,1061]" metricMagnitude="-3" metricUnit="m" metricValue="3.0" pageId="12" pageNumber="261" unit="mm" value="3.0">3 mm</quantity>
length, 25E
<emphasis id="1BA9EAD6FFC60A2BFD7AFBFDFF08FBBF" italics="true" pageId="12" pageNumber="261">
versus
<taxonomicName id="EEDD4D47FFC60A2BFCC6FBFDFF08FBBF" authorityName="Salazar-Vallejo &amp; Orensanz" authorityYear="2006" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="12" pageNumber="261" phylum="Annelida" rank="species" species="longae">P. longae</taxonomicName>
</emphasis>
length
<quantity id="EE259B21FFC60A2BFE88FBD9FE47FBBF" box="[328,416,1066,1090]" metricMagnitude="-3" metricUnit="m" metricValue="3.6" pageId="12" pageNumber="261" unit="mm" value="3.6">3.6 mm</quantity>
, 26E.
<taxonomicName id="EEDD4D47FFC60A2BFE2BFBD9FD6EFBBF" authorityName="Watson &amp; Gunton &amp; Kupriyanova" authorityYear="2024" box="[491,649,1066,1090]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="12" pageNumber="261" phylum="Annelida" rank="species" species="keni" status="sp. nov.">
<emphasis id="1BA9EAD6FFC60A2BFE2BFBD9FD6EFBBF" box="[491,649,1066,1090]" italics="true" pageId="12" pageNumber="261">Pleijelius keni</emphasis>
</taxonomicName>
<taxonomicNameLabel id="009A57ADFFC60A2BFD53FBD8FD0BFBBF" box="[659,748,1067,1090]" pageId="12" pageNumber="261" rank="species">sp. nov.</taxonomicNameLabel>
has a rectangular, narrower body and less dense notochaetal fascicles in comparison with
<taxonomicName id="EEDD4D47FFC60A2BFE18FB95FDDDFB80" authorityName="Salazar-Vallejo &amp; Orensanz" authorityYear="2006" box="[472,570,1125,1149]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="12" pageNumber="261" phylum="Annelida" rank="species" species="longae">
<emphasis id="1BA9EAD6FFC60A2BFE18FB95FDDDFB80" box="[472,570,1125,1149]" italics="true" pageId="12" pageNumber="261">P. longae</emphasis>
</taxonomicName>
which has chaetigers 49 broader than preceding ones (Salazar-Villejo &amp; Orensanz, 2006, fig. 3A; Shimabukuro
<emphasis id="1BA9EAD6FFC60A2BFDFBFB53FD8FFB4A" box="[571,616,1183,1207]" italics="true" pageId="12" pageNumber="261">et al</emphasis>
., 2020, fig. 5.3C, colour photo of a live specimen).
<taxonomicName id="EEDD4D47FFC60A2BFDC3FB4EFD7EFB28" authorityName="Watson &amp; Gunton &amp; Kupriyanova" authorityYear="2024" box="[515,665,1213,1237]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="12" pageNumber="261" phylum="Annelida" rank="species" species="keni" status="sp. nov.">
<emphasis id="1BA9EAD6FFC60A2BFDC3FB4EFD7EFB28" box="[515,665,1213,1237]" italics="true" pageId="12" pageNumber="261">Pleijelius keni</emphasis>
</taxonomicName>
<taxonomicNameLabel id="009A57ADFFC60A2BFD5EFB4EFD08FB29" box="[670,751,1213,1236]" pageId="12" pageNumber="261" rank="species">sp. nov.</taxonomicNameLabel>
and
<taxonomicName id="EEDD4D47FFC60A2BFF66FB28FEEDFB0F" authorityName="Salazar-Vallejo &amp; Orensanz" authorityYear="2006" box="[166,266,1242,1266]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="12" pageNumber="261" phylum="Annelida" rank="species" species="longae">
<emphasis id="1BA9EAD6FFC60A2BFF66FB28FEEDFB0F" box="[166,266,1242,1266]" italics="true" pageId="12" pageNumber="261">P. longae</emphasis>
</taxonomicName>
both have 10 pharyngeal papillae; however, their shape is more cirriform in the former and broad, rounded, and mound-like in the latter.
</paragraph>
<paragraph id="296236C4FFC60A2BFF05FAC1FEA4F9AF" blockId="12.[166,798,978,1999]" pageId="12" pageNumber="261">
The obvious morphological difference between the two species is notochaetal shape and ornamentation. Notochaetae of
<taxonomicName id="EEDD4D47FFC60A2BFF04FA9EFEBBFA78" authorityName="Watson &amp; Gunton &amp; Kupriyanova" authorityYear="2024" box="[196,348,1389,1413]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="12" pageNumber="261" phylum="Annelida" rank="species" species="keni" status="sp. nov.">
<emphasis id="1BA9EAD6FFC60A2BFF04FA9EFEBBFA78" box="[196,348,1389,1413]" italics="true" pageId="12" pageNumber="261">Pleijelius keni</emphasis>
</taxonomicName>
<taxonomicNameLabel id="009A57ADFFC60A2BFEA6FA9EFE5EFA79" box="[358,441,1389,1412]" pageId="12" pageNumber="261" rank="species">sp. nov.</taxonomicNameLabel>
have the distal half to third with two rows of serrate margins densely close together; serrations are of a distinctive rectangular shape. The notochaetal distal tip is slightly expanded, truncate, with a slight concave depression (
<figureCitation id="B1E62A41FFC60A2BFEEBFA11FE66FA07" box="[299,385,1506,1530]" captionStart="Figure 4" captionStartId="11.[121,189,1673,1695]" captionTargetBox="[166,1376,151,1654]" captionTargetId="figure-90@11.[166,1376,151,1654]" captionTargetPageId="11" captionText="Figure 4. Pleijelius keni sp. nov. A, entire body, dorsal view; B, detail of anterior end, dorsal view; C, detail of anterior end, ventral view; D, neuropodium mid-body, ventral view; E, detail of falcigerous neurochaetae; F, detail of flattened and slenderer notochaetae. Abbreviations: ac anal cirri; la lateral antennae; p palps; achaetous segments I-III (note shorter ventral tentacular cirri on segment III), chaetigerous segment IV, ventral view; go - genital organ; sn - simple neurochaeta; vc - ventral cirrus." figureDoi="http://doi.org/10.5281/zenodo.14668983" httpUri="https://zenodo.org/record/14668983/files/figure.png" pageId="12" pageNumber="261">Fig. 4F</figureCitation>
).
<taxonomicName id="EEDD4D47FFC60A2BFE57FA11FDB7FA07" authorityName="Salazar-Vallejo &amp; Orensanz" authorityYear="2006" box="[407,592,1506,1530]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="12" pageNumber="261" phylum="Annelida" rank="species" species="longae">
<emphasis id="1BA9EAD6FFC60A2BFE57FA11FDB7FA07" box="[407,592,1506,1530]" italics="true" pageId="12" pageNumber="261">Pleijelius longae</emphasis>
</taxonomicName>
possesses smooth notochaetal capillaries with a row of 24 tiny distal denticles, extending to blunt rounded tip (Salazar-Villejo &amp; Orensanz, 2006, fig. 3D).
</paragraph>
<paragraph id="296236C4FFC60A2BFF05F9ABFD99F8E2" blockId="12.[166,798,978,1999]" pageId="12" pageNumber="261">
Two neuroaciculae, one slender and one robust, are found in examined
<taxonomicName id="EEDD4D47FFC60A2BFEEDF986FE24F970" authorityName="Watson &amp; Gunton &amp; Kupriyanova" authorityYear="2024" box="[301,451,1653,1677]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="12" pageNumber="261" phylum="Annelida" rank="species" species="keni" status="sp. nov.">
<emphasis id="1BA9EAD6FFC60A2BFEEDF986FE24F970" box="[301,451,1653,1677]" italics="true" pageId="12" pageNumber="261">Pleijelius keni</emphasis>
</taxonomicName>
<taxonomicNameLabel id="009A57ADFFC60A2BFE07F986FDFEF971" box="[455,537,1653,1676]" pageId="12" pageNumber="261" rank="species">sp. nov.</taxonomicNameLabel>
and in published figures of
<taxonomicName id="EEDD4D47FFC60A2BFF01F961FE96F957" authorityName="Salazar-Vallejo &amp; Orensanz" authorityYear="2006" box="[193,369,1682,1706]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="12" pageNumber="261" phylum="Annelida" rank="species" species="longae">
<emphasis id="1BA9EAD6FFC60A2BFF01F961FE96F957" box="[193,369,1682,1706]" italics="true" pageId="12" pageNumber="261">Pleijelius longae</emphasis>
</taxonomicName>
. Rarely a hooked acicula spine is present additionally to the two neuroaciculae in
<taxonomicName id="EEDD4D47FFC60A2BFD9BF95CFD14F93A" authorityName="Watson &amp; Gunton &amp; Kupriyanova" authorityYear="2024" box="[603,755,1711,1735]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="12" pageNumber="261" phylum="Annelida" rank="species" species="keni" status="sp. nov.">
<emphasis id="1BA9EAD6FFC60A2BFD9BF95CFD14F93A" box="[603,755,1711,1735]" italics="true" pageId="12" pageNumber="261">Pleijelius keni</emphasis>
</taxonomicName>
<taxonomicNameLabel id="009A57ADFFC60A2BFD3BF943FF30F919" pageId="12" pageNumber="261" rank="species">sp. nov.</taxonomicNameLabel>
; a robust single neuroacicula, which in some podia doubles over forming a hook, is illustrated for
<taxonomicName id="EEDD4D47FFC60A2BFD75F918FCFDF8FF" authorityName="Salazar-Vallejo &amp; Orensanz" authorityYear="2006" box="[693,794,1770,1794]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="12" pageNumber="261" phylum="Annelida" rank="species" species="longae">
<emphasis id="1BA9EAD6FFC60A2BFD75F918FCFDF8FF" box="[693,794,1770,1794]" italics="true" pageId="12" pageNumber="261">P. longae</emphasis>
</taxonomicName>
(Salazar-Villejo &amp; Orensanz, 2006, fig. 5B).
</paragraph>
<paragraph id="296236C4FFC60A2BFF05F8D6FBE6FEF5" blockId="12.[166,798,978,1999]" lastBlockId="12.[839,1467,151,498]" pageId="12" pageNumber="261">
An entire pygidium of
<taxonomicName id="EEDD4D47FFC60A2BFE03F8D6FDBAF8C0" authorityName="Watson &amp; Gunton &amp; Kupriyanova" authorityYear="2024" box="[451,605,1829,1853]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="12" pageNumber="261" phylum="Annelida" rank="species" species="keni" status="sp. nov.">
<emphasis id="1BA9EAD6FFC60A2BFE03F8D6FDBAF8C0" box="[451,605,1829,1853]" italics="true" pageId="12" pageNumber="261">Pleijelius keni</emphasis>
</taxonomicName>
<taxonomicNameLabel id="009A57ADFFC60A2BFDA7F8D6FD5BF8C1" box="[615,700,1829,1852]" pageId="12" pageNumber="261" rank="species">sp. nov.</taxonomicNameLabel>
has two long, robust dorso-lateral anal cirri and a single anal cirrus originating ventrally; the latter is poorly visible as most specimens have missing or damaged pygidia. Salazar-Villejo and Orensanz (2006, fig. 2A, 3 AB) describe the pygidia of
<taxonomicName id="EEDD4D47FFC60A2BFF03F844FE91F832" authorityName="Salazar-Vallejo &amp; Orensanz" authorityYear="2006" box="[195,374,1975,1999]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="12" pageNumber="261" phylum="Annelida" rank="species" species="longae">
<emphasis id="1BA9EAD6FFC60A2BFF03F844FE91F832" box="[195,374,1975,1999]" italics="true" pageId="12" pageNumber="261">Pleijelius longae</emphasis>
</taxonomicName>
with two pairs of long, robust anal cirri and no ventral anal structure. Their figures show a damaged posterior end, but a single pair of dorso-lateral anal cirri is visible along with typically compressed posterior-most cirrose segments.
</paragraph>
<paragraph id="296236C4FFC60A2BFCA5FEFEFB6EFE0F" blockId="12.[839,1467,151,498]" pageId="12" pageNumber="261">
In
<specimenCount id="3FDBFD4DFFC60A2BFC43FEFEFBF1FED8" box="[899,1046,269,293]" count="1" pageId="12" pageNumber="261" type="generic">one specimen</specimenCount>
of
<taxonomicName id="EEDD4D47FFC60A2BFBFBFEFEFB34FED8" authorityName="Watson &amp; Gunton &amp; Kupriyanova" authorityYear="2024" box="[1083,1235,269,293]" class="Polychaeta" family="Hesionidae" genus="Pleijelius" kingdom="Animalia" order="Phyllodocida" pageId="12" pageNumber="261" phylum="Annelida" rank="species" species="keni" status="sp. nov.">
<emphasis id="1BA9EAD6FFC60A2BFBFBFEFEFB34FED8" box="[1083,1235,269,293]" italics="true" pageId="12" pageNumber="261">Pleijelius keni</emphasis>
</taxonomicName>
<taxonomicNameLabel id="009A57ADFFC60A2BFB1BFEFEFAD6FED9" box="[1243,1329,269,292]" pageId="12" pageNumber="261" rank="species">sp. nov.</taxonomicNameLabel>
, contraction, possibly due to SEM drying, has led to the position of the dorsal cirri being much more dorsally orientated compared to the notochaetal fascicle (
<figureCitation id="B1E62A41FFC60A2BFBA9FE96FB5BFE80" box="[1129,1212,357,381]" captionStart="Figure 4" captionStartId="11.[121,189,1673,1695]" captionTargetBox="[166,1376,151,1654]" captionTargetId="figure-90@11.[166,1376,151,1654]" captionTargetPageId="11" captionText="Figure 4. Pleijelius keni sp. nov. A, entire body, dorsal view; B, detail of anterior end, dorsal view; C, detail of anterior end, ventral view; D, neuropodium mid-body, ventral view; E, detail of falcigerous neurochaetae; F, detail of flattened and slenderer notochaetae. Abbreviations: ac anal cirri; la lateral antennae; p palps; achaetous segments I-III (note shorter ventral tentacular cirri on segment III), chaetigerous segment IV, ventral view; go - genital organ; sn - simple neurochaeta; vc - ventral cirrus." figureDoi="http://doi.org/10.5281/zenodo.14668983" httpUri="https://zenodo.org/record/14668983/files/figure.png" pageId="12" pageNumber="261">Fig. 4A</figureCitation>
) observed in specimens from the same sample. These other specimens have the notochaetal fascicle visible in dorsal view and partially covering the dorsal cirri, as shown in notopodium of segment IV, on the right side (
<figureCitation id="B1E62A41FFC60A2BFBE8FE29FB9BFE0F" box="[1064,1148,474,498]" captionStart="Figure 4" captionStartId="11.[121,189,1673,1695]" captionTargetBox="[166,1376,151,1654]" captionTargetId="figure-90@11.[166,1376,151,1654]" captionTargetPageId="11" captionText="Figure 4. Pleijelius keni sp. nov. A, entire body, dorsal view; B, detail of anterior end, dorsal view; C, detail of anterior end, ventral view; D, neuropodium mid-body, ventral view; E, detail of falcigerous neurochaetae; F, detail of flattened and slenderer notochaetae. Abbreviations: ac anal cirri; la lateral antennae; p palps; achaetous segments I-III (note shorter ventral tentacular cirri on segment III), chaetigerous segment IV, ventral view; go - genital organ; sn - simple neurochaeta; vc - ventral cirrus." figureDoi="http://doi.org/10.5281/zenodo.14668983" httpUri="https://zenodo.org/record/14668983/files/figure.png" pageId="12" pageNumber="261">Fig. 4B</figureCitation>
).
</paragraph>
</subSubSection>
</treatment>
</document>