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<document id="653F4BF26E4EA9FC0FC8987EF68C4314" ID-DOI="10.3853/j.2201-4349.75.2023.1799" ID-ISSN="2201-4349" ID-Zenodo-Dep="10414165" 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.treatments_approvedBy="felipe" checkinTime="1703108759495" checkinUser="felipe" docAuthor="Blake, James A." docDate="2023" docId="03B987C1FFCAED45B6F9FB6C6F36F85C" docLanguage="en" docName="RecAustMus.75.3.249-270.pdf" docOrigin="Records of the Australian Museum (Rec. Aust. Mus.) 75 (3)" docSource="http://dx.doi.org/10.3853/j.2201-4349.75.2023.1799" docStyle="DocumentStyle:997BA24B490466A2F99594A367FA147F.4:RecAustMus.2019-.journal_article.0cover" docStyleId="997BA24B490466A2F99594A367FA147F" docStyleName="RecAustMus.2019-.journal_article.0cover" docStyleVersion="4" docTitle="Chaetocirratulus bathyalis Blake 2023, sp. nov." docType="treatment" docUuid="518D66CF-5EEA-4503-8069-A59E1D9BDC8B" docUuidSource="ZooBank" docVersion="2" lastPageNumber="255" masterDocId="FF80FFB9FFCCED43B619FF806B42FF93" masterDocTitle="New Species of Cirratulidae (Annelida) from Continental Slope and Abyssal Depths off Eastern Australia" masterLastPageNumber="270" masterPageNumber="249" pageNumber="255" updateTime="1703110597725" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-4.0">
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<mods:title id="B47F36B7104888EF1A02FA74C3454B90">New Species of Cirratulidae (Annelida) from Continental Slope and Abyssal Depths off Eastern Australia</mods:title>
</mods:titleInfo>
<mods:name id="C902C2D51FF5B44DBE28231FBC968617" type="personal">
<mods:role id="FF8286DE9C426E96D7F3BA14C5BB9EFC">
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<mods:namePart id="AB9ADB16DA4DE9550CD4196355FF7BC9">Blake, James A.</mods:namePart>
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<mods:typeOfResource id="1D5ABBFAB76EB4D5BCE2DDFEA77752AC">text</mods:typeOfResource>
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<mods:title id="C666DA9C86D4836073F27D31F094060A">Records of the Australian Museum</mods:title>
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<mods:date id="3E9165E68EB554D01D0CF190E7540940">2023</mods:date>
<mods:detail id="9DACD55D5BC24C7A76CCD40702379DD0" type="series">
<mods:title id="967525C1CB985A3F974E27E2CBC2B2CE">Rec. Aust. Mus.</mods:title>
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<mods:number id="131BBA2EFE71DE8B48B688D0F2CCB62D">2023-05-17</mods:number>
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<mods:detail id="F68AB27147617E8C832D225D658C1E14" type="volume">
<mods:number id="7E256DDF8152D3AB833F774014CE340C">75</mods:number>
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<mods:number id="180163128AC3F0C8A6D7D217DABD72BA">3</mods:number>
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<mods:start id="B90CF6543B34D2DEED89A61E429EBD49">249</mods:start>
<mods:end id="EB074C13145BE01097AD43963EBAF3E0">270</mods:end>
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<mods:url id="415A42DC6511207C2DD17EE5C98FECD4">http://dx.doi.org/10.3853/j.2201-4349.75.2023.1799</mods:url>
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<mods:classification id="E15F9EA12361347E6768169AFFD20CA8">journal article</mods:classification>
<mods:identifier id="6429E14AD98436DB46FC34405EB81FF2" type="DOI">10.3853/j.2201-4349.75.2023.1799</mods:identifier>
<mods:identifier id="70BACFACF768A811B194A90ACD72EAC0" type="ISSN">2201-4349</mods:identifier>
<mods:identifier id="4B509F87F48253836969B209EC69442D" type="Zenodo-Dep">10414165</mods:identifier>
<mods:identifier id="7260A58D9C6A2B935C9AE56029E164FF" type="ZooBank">7D3BDF25-010F-41A4-AD15-763C3F067D8A</mods:identifier>
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<treatment id="03B987C1FFCAED45B6F9FB6C6F36F85C" LSID="urn:lsid:zoobank.org:act:518D66CF-5EEA-4503-8069-A59E1D9BDC8B" httpUri="http://treatment.plazi.org/id/03B987C1FFCAED45B6F9FB6C6F36F85C" lastPageNumber="255" pageId="6" pageNumber="255">
<subSubSection id="C30A655CFFCAED45B6F9FB6C684CFABC" pageId="6" pageNumber="255" type="nomenclature">
<paragraph id="8BAF36D7FFCAED45B6F9FB6C69A2FA9F" blockId="6.[224,736,1260,1292]" box="[224,736,1260,1292]" pageId="6" pageNumber="255">
<heading id="D0E781BBFFCAED45B6F9FB6C69A2FA9F" bold="true" box="[224,736,1260,1292]" centered="true" fontSize="12" level="2" pageId="6" pageNumber="255" reason="2">
<emphasis id="B964EAC5FFCAED45B6F9FB6C69A2FA9F" bold="true" box="[224,736,1260,1292]" pageId="6" pageNumber="255">
<taxonomicName id="4C104D54FFCAED45B6F9FB6C6927FA98" ID-CoL="BDS66" authority="Blake, 2023" authorityName="Blake" authorityYear="2023" box="[224,613,1260,1291]" class="Polychaeta" family="Cirratulidae" genus="Chaetocirratulus" kingdom="Animalia" order="Terebellida" pageId="6" pageNumber="255" phylum="Annelida" rank="species" species="bathyalis" status="sp. nov.">
<emphasis id="B964EAC5FFCAED45B6F9FB6C6927FA98" bold="true" box="[224,613,1260,1291]" italics="true" pageId="6" pageNumber="255">Chaetocirratulus bathyalis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A25757BEFFCAED45B476FB6D69A2FA9F" box="[623,736,1261,1292]" pageId="6" pageNumber="255" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
</heading>
</paragraph>
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<uri id="FF813AD5FFCAED45B6AAFA9D684CFABC" box="[179,782,1309,1327]" pageId="6" pageNumber="255">
urn:lsid:zoobank.org:act:
<uuid id="FFB60C02FFCAED45B767FA9D684CFABC" box="[382,782,1309,1327]" pageId="6" pageNumber="255">518D66CF-5EEA-4503-8069-A59E1D9BDC8B</uuid>
</uri>
</paragraph>
</subSubSection>
<subSubSection id="C30A655CFFCAED45B7A4FACC6941FAF5" box="[445,515,1356,1382]" pageId="6" pageNumber="255" type="description">
<paragraph id="8BAF36D7FFCAED45B7A4FACC6941FAF5" blockId="6.[445,515,1356,1382]" box="[445,515,1356,1382]" pageId="6" pageNumber="255">
<figureCitation id="132B2A52FFCAED45B7A4FACC6941FAF5" box="[445,515,1356,1382]" captionStart="Figure 4" captionStartId="7.[121,188,1803,1825]" captionTargetBox="[154,1404,175,1757]" captionTargetId="figure-10@7.[121,1421,168,1782]" captionTargetPageId="7" captionText="Figure 4. Chaetocirratulus bathyalis sp. nov.(A–F), holotype (AM W.52713):(A) anterior end, dorsal view; (B) anterior end ventral view; (C) posterior end, dorsal view; (D) parapodium from an anterior setiger, anterior view; (E) notoacicular spines; (F) neuroacicular spines." figureDoi="http://doi.org/10.5281/zenodo.10414173" httpUri="https://zenodo.org/record/10414173/files/figure.png" pageId="6" pageNumber="255">Fig. 4</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="C30A655CFFCAED45B6BFFAFB6AEAF99B" pageId="6" pageNumber="255" type="materials_examined">
<paragraph id="8BAF36D7FFCAED45B6BFFAFB6AEAF99B" blockId="6.[166,794,1403,1544]" pageId="6" pageNumber="255">
<materialsCitation id="3B783C8AFFCAED45B6BFFAFB6AEAF99B" collectingDate="2017-06-06" collectionCode="NSW, RV, AM" country="Australia" county="Brenke" elevation="2634" latitude="-30.116" location="Continental" longLatPrecision="73" longitude="153.867" municipality="Central Eastern Marine Park" pageId="6" pageNumber="255" specimenCount="1" typeStatus="holotype">
<emphasis id="B964EAC5FFCAED45B6BFFAFB6A4CFA00" bold="true" box="[166,270,1403,1427]" pageId="6" pageNumber="255">
<typeStatus id="54AB8875FFCAED45B6BFFAFB6A4CFA00" box="[166,270,1403,1427]" pageId="6" pageNumber="255" type="holotype">Holotype</typeStatus>
</emphasis>
.
<location id="8ECF600CFFCAED45B704FAFB6ADBFA00" LSID="urn:lsid:plazi:treatment:03B987C1FFCAED45B6F9FB6C6F36F85C:8ECF600CFFCAED45B704FAFB6ADBFA00" box="[285,409,1403,1427]" country="Australia" county="Brenke" latitude="-30.116" longLatPrecision="73" longitude="153.867" municipality="Central Eastern Marine Park" name="Continental" pageId="6" pageNumber="255">Continental</location>
slope off eastern
<collectingCountry id="F3077647FFCAED45B443FAFB69FDFA00" box="[602,703,1403,1427]" name="Australia" pageId="6" pageNumber="255">Australia</collectingCountry>
,
<collectingMunicipality id="6BCBACADFFCAED45B4D2FAFB6AE2FA23" pageId="6" pageNumber="255">Central Eastern Marine Park</collectingMunicipality>
,
<locationDeviation id="9A1D2FF5FFCAED45B7B6FA1969D5FA23" box="[431,663,1432,1456]" location="Coffs Harbor" pageId="6" pageNumber="255">W of Coffs Harbor</locationDeviation>
,
<collectionCode id="ED01AE12FFCAED45B4BEFA1869A4FA23" box="[679,742,1432,1456]" country="Australia" lsid="urn:lsid:biocol.org:col:15627" name="Royal Botanic Gardens, National Herbarium of New South Wales" pageId="6" pageNumber="255" type="Herbarium">NSW</collectionCode>
,
<collectionCode id="ED01AE12FFCAED45B4EFFA19685AFA23" box="[758,792,1433,1456]" country="Italy" name="Collection of Leptospira Strains" pageId="6" pageNumber="255">RV</collectionCode>
<taxonomicName id="4C104D54FFCAED45B6BEFA366A22FA5D" authority=", Sta." authorityName="Sta." box="[167,352,1462,1486]" class="Actinopterygii" family="Nemichthyidae" genus="Investigator" higherTaxonomySource="GBIF" kingdom="Animalia" order="Anguilliformes" pageId="6" pageNumber="255" phylum="Chordata" rank="genus">
<emphasis id="B964EAC5FFCAED45B6BEFA366A65FA5E" box="[167,295,1462,1485]" italics="true" pageId="6" pageNumber="255">Investigator</emphasis>
, Sta.
</taxonomicName>
087, coll.
<date id="FFAE1017FFCAED45B7CEFA35692EFA5D" box="[471,620,1461,1486]" pageId="6" pageNumber="255" value="2017-06-06">
<collectingDate id="EFEAE9FFFFCAED45B7CEFA35692EFA5D" box="[471,620,1461,1486]" pageId="6" pageNumber="255" value="2017-06-06">06 June 2017</collectingDate>
</date>
,
<collectingCounty id="62CE4E5BFFCAED45B460FA366984FA5D" box="[633,710,1462,1486]" pageId="6" pageNumber="255">Brenke</collectingCounty>
sledge, start
<geoCoordinate id="EE245010FFCAED45B6C2FA536A7CFA78" box="[219,318,1491,1515]" degrees="30.113" direction="south" orientation="latitude" pageId="6" pageNumber="255" precision="55" value="-30.113">30.113°S</geoCoordinate>
<geoCoordinate id="EE245010FFCAED45B75DFA536AFAFA78" box="[324,440,1491,1515]" degrees="153.898" direction="east" orientation="longitude" pageId="6" pageNumber="255" precision="55" value="153.898">153.898°E</geoCoordinate>
,
<quantity id="4CE89B32FFCAED45B7DDFA536957FA79" box="[452,533,1491,1515]" metricMagnitude="3" metricUnit="m" metricValue="2.6339999999999995" pageId="6" pageNumber="255" unit="m" value="2634.0">
<elevation id="003DD1E4FFCAED45B7DDFA536957FA79" box="[452,533,1491,1515]" metricMagnitude="3" metricUnit="m" metricValue="2.6339999999999995" pageId="6" pageNumber="255" unit="m" value="2634.0">2634 m</elevation>
</quantity>
to
<geoCoordinate id="EE245010FFCAED45B421FA5369D8FA78" box="[568,666,1491,1515]" degrees="30.116" direction="south" orientation="latitude" pageId="6" pageNumber="255" precision="55" value="-30.116">30.116°S</geoCoordinate>
<geoCoordinate id="EE245010FFCAED45B4B8FA536857FA78" box="[673,789,1491,1515]" degrees="153.867" direction="east" orientation="longitude" pageId="6" pageNumber="255" precision="55" value="153.867">153.867°E</geoCoordinate>
,
<quantity id="4CE89B32FFCAED45B6BFFA706BB5F99B" box="[166,247,1520,1544]" metricMagnitude="3" metricUnit="m" metricValue="2.324" pageId="6" pageNumber="255" unit="m" value="2324.0">
<elevation id="003DD1E4FFCAED45B6BFFA706BB5F99B" box="[166,247,1520,1544]" metricMagnitude="3" metricUnit="m" metricValue="2.324" pageId="6" pageNumber="255" unit="m" value="2324.0">2324 m</elevation>
</quantity>
(
<collectionCode id="ED01AE12FFCAED45B71CFA706A70F99B" box="[261,306,1520,1544]" country="Australia" name="Australian Museum" pageId="6" pageNumber="255" type="Museum">AM</collectionCode>
W.52713).
</materialsCitation>
</paragraph>
</subSubSection>
<subSubSection id="C30A655CFFCAED45B6BFF99D6F86FB4C" pageId="6" pageNumber="255" type="description">
<paragraph id="8BAF36D7FFCAED45B6BFF99D697AF806" blockId="6.[166,794,1565,2000]" pageId="6" pageNumber="255">
<emphasis id="B964EAC5FFCAED45B6BFF99D6A6AF9A6" bold="true" box="[166,296,1565,1589]" pageId="6" pageNumber="255">Description</emphasis>
.A small species,
<typeStatus id="54AB8875FFCAED45B7C7F99E6978F9A5" box="[478,570,1566,1590]" pageId="6" pageNumber="255" type="holotype">holotype</typeStatus>
complete, with about 65 setigers,
<quantity id="4CE89B32FFCAED45B737F9BB6AD3F9C1" box="[302,401,1595,1619]" metricMagnitude="-2" metricUnit="m" metricValue="1.31" pageId="6" pageNumber="255" unit="mm" value="13.1">13.1 mm</quantity>
long,
<quantity id="4CE89B32FFCAED45B7C2F9BB6973F9C1" box="[475,561,1595,1619]" metricMagnitude="-3" metricUnit="m" metricValue="1.1" pageId="6" pageNumber="255" unit="mm" value="1.1">1.1 mm</quantity>
wide across anterior setigers and about
<quantity id="4CE89B32FFCAED45B765F9D86A90F9E3" box="[380,466,1624,1648]" metricMagnitude="-3" metricUnit="m" metricValue="1.2" pageId="6" pageNumber="255" unit="mm" value="1.2">1.2 mm</quantity>
wide across middle setigers, narrowing posteriorly. Body elongate, thick, grub-like, but not fusiform; segments short, wide, anterior segments about 4.5 times wider than long (
<figureCitation id="132B2A52FFCAED45B7C3F9306976F95B" box="[474,564,1712,1736]" captionStart="Figure 4" captionStartId="7.[121,188,1803,1825]" captionTargetBox="[154,1404,175,1757]" captionTargetId="figure-10@7.[121,1421,168,1782]" captionTargetPageId="7" captionText="Figure 4. Chaetocirratulus bathyalis sp. nov.(A–F), holotype (AM W.52713):(A) anterior end, dorsal view; (B) anterior end ventral view; (C) posterior end, dorsal view; (D) parapodium from an anterior setiger, anterior view; (E) notoacicular spines; (F) neuroacicular spines." figureDoi="http://doi.org/10.5281/zenodo.10414173" httpUri="https://zenodo.org/record/10414173/files/figure.png" pageId="6" pageNumber="255">Fig. 4A</figureCitation>
); posterior segments about six times wider than long (
<figureCitation id="132B2A52FFCAED45B41CF94E6918F975" box="[517,602,1742,1766]" captionStart="Figure 4" captionStartId="7.[121,188,1803,1825]" captionTargetBox="[154,1404,175,1757]" captionTargetId="figure-10@7.[121,1421,168,1782]" captionTargetPageId="7" captionText="Figure 4. Chaetocirratulus bathyalis sp. nov.(A–F), holotype (AM W.52713):(A) anterior end, dorsal view; (B) anterior end ventral view; (C) posterior end, dorsal view; (D) parapodium from an anterior setiger, anterior view; (E) notoacicular spines; (F) neuroacicular spines." figureDoi="http://doi.org/10.5281/zenodo.10414173" httpUri="https://zenodo.org/record/10414173/files/figure.png" pageId="6" pageNumber="255">Fig. 4C</figureCitation>
). In cross section, body segments dorsoventrally flattened, but with dorsum and venter rounded; with ventral ridge extending from peristomium continuing along entire body; dorsal ridge or groove absent. Individual segments all uniannulate, but middle and posterior segments crossed with numerous thin wrinkles. Colour in alcohol: light tan.
</paragraph>
<paragraph id="8BAF36D7FFCAED45B6DCF81B6E35FDF4" blockId="6.[166,794,1565,2000]" lastBlockId="6.[839,1468,151,1114]" pageId="6" pageNumber="255">
Pre-setiger region about as wide as long, as long first five setigers (
<figureCitation id="132B2A52FFCAED45B72AF8386ACAF843" box="[307,392,1976,2000]" captionStart="Figure 4" captionStartId="7.[121,188,1803,1825]" captionTargetBox="[154,1404,175,1757]" captionTargetId="figure-10@7.[121,1421,168,1782]" captionTargetPageId="7" captionText="Figure 4. Chaetocirratulus bathyalis sp. nov.(A–F), holotype (AM W.52713):(A) anterior end, dorsal view; (B) anterior end ventral view; (C) posterior end, dorsal view; (D) parapodium from an anterior setiger, anterior view; (E) notoacicular spines; (F) neuroacicular spines." figureDoi="http://doi.org/10.5281/zenodo.10414173" httpUri="https://zenodo.org/record/10414173/files/figure.png" pageId="6" pageNumber="255">Fig. 4A</figureCitation>
). Prostomium wedge-shaped in dorsal and ventral view, narrowing to rounded tip (
<figureCitation id="132B2A52FFCAED45B32CFF176EEDFF23" box="[1333,1455,151,176]" captionStart="Figure 4" captionStartId="7.[121,188,1803,1825]" captionTargetBox="[154,1404,175,1757]" captionTargetId="figure-10@7.[121,1421,168,1782]" captionTargetPageId="7" captionText="Figure 4. Chaetocirratulus bathyalis sp. nov.(A–F), holotype (AM W.52713):(A) anterior end, dorsal view; (B) anterior end ventral view; (C) posterior end, dorsal view; (D) parapodium from an anterior setiger, anterior view; (E) notoacicular spines; (F) neuroacicular spines." figureDoi="http://doi.org/10.5281/zenodo.10414173" httpUri="https://zenodo.org/record/10414173/files/figure.png" pageId="6" pageNumber="255">Fig. 4A–B</figureCitation>
); with rounded, bulbous shape in lateral view; eyespots absent; nuchal organs large, crescent-shaped grooves on posterior lateral margin. Peristomium with lateral and ventral grooves producing three rings (
<figureCitation id="132B2A52FFCAED45B2F6FE8D6E05FEB6" box="[1263,1351,269,293]" captionStart="Figure 4" captionStartId="7.[121,188,1803,1825]" captionTargetBox="[154,1404,175,1757]" captionTargetId="figure-10@7.[121,1421,168,1782]" captionTargetPageId="7" captionText="Figure 4. Chaetocirratulus bathyalis sp. nov.(A–F), holotype (AM W.52713):(A) anterior end, dorsal view; (B) anterior end ventral view; (C) posterior end, dorsal view; (D) parapodium from an anterior setiger, anterior view; (E) notoacicular spines; (F) neuroacicular spines." figureDoi="http://doi.org/10.5281/zenodo.10414173" httpUri="https://zenodo.org/record/10414173/files/figure.png" pageId="6" pageNumber="255">Fig. 4A</figureCitation>
), a narrow anterior ring followed by two more-or-less equal larger rings; surmounted by irregular shaped dorsal crest not crossed by peristomial grooves (
<figureCitation id="132B2A52FFCAED45B232FEE56FC1FEEE" box="[1067,1155,357,381]" captionStart="Figure 4" captionStartId="7.[121,188,1803,1825]" captionTargetBox="[154,1404,175,1757]" captionTargetId="figure-10@7.[121,1421,168,1782]" captionTargetPageId="7" captionText="Figure 4. Chaetocirratulus bathyalis sp. nov.(A–F), holotype (AM W.52713):(A) anterior end, dorsal view; (B) anterior end ventral view; (C) posterior end, dorsal view; (D) parapodium from an anterior setiger, anterior view; (E) notoacicular spines; (F) neuroacicular spines." figureDoi="http://doi.org/10.5281/zenodo.10414173" httpUri="https://zenodo.org/record/10414173/files/figure.png" pageId="6" pageNumber="255">Fig. 4A</figureCitation>
). Ventrally, peristomial rings only weakly apparent; mouth opening encompassed by first ring, with upper lip formed by about six lobes (
<figureCitation id="132B2A52FFCAED45B34EFE1F6EECFE2B" box="[1367,1454,415,440]" captionStart="Figure 4" captionStartId="7.[121,188,1803,1825]" captionTargetBox="[154,1404,175,1757]" captionTargetId="figure-10@7.[121,1421,168,1782]" captionTargetPageId="7" captionText="Figure 4. Chaetocirratulus bathyalis sp. nov.(A–F), holotype (AM W.52713):(A) anterior end, dorsal view; (B) anterior end ventral view; (C) posterior end, dorsal view; (D) parapodium from an anterior setiger, anterior view; (E) notoacicular spines; (F) neuroacicular spines." figureDoi="http://doi.org/10.5281/zenodo.10414173" httpUri="https://zenodo.org/record/10414173/files/figure.png" pageId="6" pageNumber="255">Fig. 4B</figureCitation>
). Dorsal tentacles arise from a narrow groove between third peristomial ring and setiger 1, possibly an achaetous segment (
<figureCitation id="132B2A52FFCAED45B556FE7768E1FD83" box="[847,931,503,528]" captionStart="Figure 4" captionStartId="7.[121,188,1803,1825]" captionTargetBox="[154,1404,175,1757]" captionTargetId="figure-10@7.[121,1421,168,1782]" captionTargetPageId="7" captionText="Figure 4. Chaetocirratulus bathyalis sp. nov.(A–F), holotype (AM W.52713):(A) anterior end, dorsal view; (B) anterior end ventral view; (C) posterior end, dorsal view; (D) parapodium from an anterior setiger, anterior view; (E) notoacicular spines; (F) neuroacicular spines." figureDoi="http://doi.org/10.5281/zenodo.10414173" httpUri="https://zenodo.org/record/10414173/files/figure.png" pageId="6" pageNumber="255">Fig. 4A</figureCitation>
). First pair of branchiae lateral to dorsal tentacles in same groove. Subsequent branchiae arise dorsal to notosetae from setiger 1, continuing on subsequent setigers (
<figureCitation id="132B2A52FFCAED45B342FDB26EECFDD9" box="[1371,1454,562,586]" captionStart="Figure 4" captionStartId="7.[121,188,1803,1825]" captionTargetBox="[154,1404,175,1757]" captionTargetId="figure-10@7.[121,1421,168,1782]" captionTargetPageId="7" captionText="Figure 4. Chaetocirratulus bathyalis sp. nov.(A–F), holotype (AM W.52713):(A) anterior end, dorsal view; (B) anterior end ventral view; (C) posterior end, dorsal view; (D) parapodium from an anterior setiger, anterior view; (E) notoacicular spines; (F) neuroacicular spines." figureDoi="http://doi.org/10.5281/zenodo.10414173" httpUri="https://zenodo.org/record/10414173/files/figure.png" pageId="6" pageNumber="255">Fig. 4B</figureCitation>
). Most branchiae missing or reduced to stubs or scars.
</paragraph>
<paragraph id="8BAF36D7FFCAED45B57CFDED6EEAFB8C" blockId="6.[839,1468,151,1114]" pageId="6" pageNumber="255">
Parapodia reduced to ridge from which noto- and neurosetae arise (
<figureCitation id="132B2A52FFCAED45B214FD0A6F2AFD31" box="[1037,1128,650,674]" captionStart="Figure 4" captionStartId="7.[121,188,1803,1825]" captionTargetBox="[154,1404,175,1757]" captionTargetId="figure-10@7.[121,1421,168,1782]" captionTargetPageId="7" captionText="Figure 4. Chaetocirratulus bathyalis sp. nov.(A–F), holotype (AM W.52713):(A) anterior end, dorsal view; (B) anterior end ventral view; (C) posterior end, dorsal view; (D) parapodium from an anterior setiger, anterior view; (E) notoacicular spines; (F) neuroacicular spines." figureDoi="http://doi.org/10.5281/zenodo.10414173" httpUri="https://zenodo.org/record/10414173/files/figure.png" pageId="6" pageNumber="255">Fig. 4D</figureCitation>
); podial lobes entirely absent. Noto- and neurosetae include acicular spines and long, thin capillaries.Acicular spines arise from setiger
<quantity id="4CE89B32FFCAED45B33BFD456E08FD4E" box="[1314,1354,709,733]" metricMagnitude="-2" metricUnit="m" metricValue="2.54" pageId="6" pageNumber="255" unit="in" value="1.0">1 in</quantity>
both noto- and neuropodia. Notosetae include 3–4 acicular spines and at least one long capillary in anterior setigers (
<figureCitation id="132B2A52FFCAED45B31DFD7F6E14FC8B" box="[1284,1366,767,792]" captionStart="Figure 4" captionStartId="7.[121,188,1803,1825]" captionTargetBox="[154,1404,175,1757]" captionTargetId="figure-10@7.[121,1421,168,1782]" captionTargetPageId="7" captionText="Figure 4. Chaetocirratulus bathyalis sp. nov.(A–F), holotype (AM W.52713):(A) anterior end, dorsal view; (B) anterior end ventral view; (C) posterior end, dorsal view; (D) parapodium from an anterior setiger, anterior view; (E) notoacicular spines; (F) neuroacicular spines." figureDoi="http://doi.org/10.5281/zenodo.10414173" httpUri="https://zenodo.org/record/10414173/files/figure.png" pageId="6" pageNumber="255">Fig. 4D</figureCitation>
), reduced to 1–2 spines and one long capillary in middle and posterior setigers. Neurosetae include 4–5 acicular spines and at least one long capillary in anterior setigers (
<figureCitation id="132B2A52FFCAED45B2FBFCD76E7AFCE3" box="[1250,1336,855,880]" captionStart="Figure 4" captionStartId="7.[121,188,1803,1825]" captionTargetBox="[154,1404,175,1757]" captionTargetId="figure-10@7.[121,1421,168,1782]" captionTargetPageId="7" captionText="Figure 4. Chaetocirratulus bathyalis sp. nov.(A–F), holotype (AM W.52713):(A) anterior end, dorsal view; (B) anterior end ventral view; (C) posterior end, dorsal view; (D) parapodium from an anterior setiger, anterior view; (E) notoacicular spines; (F) neuroacicular spines." figureDoi="http://doi.org/10.5281/zenodo.10414173" httpUri="https://zenodo.org/record/10414173/files/figure.png" pageId="6" pageNumber="255">Fig. 4D</figureCitation>
), reduced to 2–3 spines and one long capillary posteriorly. Notoacicular setae generally with weakly curved shafts narrowing to rounded tip (
<figureCitation id="132B2A52FFCAED45B5C2FC2F6F76FC5B" box="[987,1076,943,968]" captionStart="Figure 4" captionStartId="7.[121,188,1803,1825]" captionTargetBox="[154,1404,175,1757]" captionTargetId="figure-10@7.[121,1421,168,1782]" captionTargetPageId="7" captionText="Figure 4. Chaetocirratulus bathyalis sp. nov.(A–F), holotype (AM W.52713):(A) anterior end, dorsal view; (B) anterior end ventral view; (C) posterior end, dorsal view; (D) parapodium from an anterior setiger, anterior view; (E) notoacicular spines; (F) neuroacicular spines." figureDoi="http://doi.org/10.5281/zenodo.10414173" httpUri="https://zenodo.org/record/10414173/files/figure.png" pageId="6" pageNumber="255">Fig. 4E</figureCitation>
); neuroacicular setae with slightly thicker, straight shaft and rounded tips (
<figureCitation id="132B2A52FFCAED45B2FFFC4D6E74FC76" box="[1254,1334,973,997]" captionStart="Figure 4" captionStartId="7.[121,188,1803,1825]" captionTargetBox="[154,1404,175,1757]" captionTargetId="figure-10@7.[121,1421,168,1782]" captionTargetPageId="7" captionText="Figure 4. Chaetocirratulus bathyalis sp. nov.(A–F), holotype (AM W.52713):(A) anterior end, dorsal view; (B) anterior end ventral view; (C) posterior end, dorsal view; (D) parapodium from an anterior setiger, anterior view; (E) notoacicular spines; (F) neuroacicular spines." figureDoi="http://doi.org/10.5281/zenodo.10414173" httpUri="https://zenodo.org/record/10414173/files/figure.png" pageId="6" pageNumber="255">Fig. 4F</figureCitation>
). Capillaries of anterior setigers narrow, whip-like, becoming thicker and stiff posteriorly. Majority of setae broken off in
<typeStatus id="54AB8875FFCAED45B35AFB876EE6FB8C" box="[1347,1444,1031,1055]" pageId="6" pageNumber="255" type="holotype">holotype</typeStatus>
.
</paragraph>
<paragraph id="8BAF36D7FFCAED45B57CFBA56F01FBC9" blockId="6.[839,1468,151,1114]" pageId="6" pageNumber="255">
Posterior end narrowing to short pygidium with cap-like rounded lobe (
<figureCitation id="132B2A52FFCAED45B5FBFBC26F74FBC9" box="[994,1078,1090,1114]" captionStart="Figure 4" captionStartId="7.[121,188,1803,1825]" captionTargetBox="[154,1404,175,1757]" captionTargetId="figure-10@7.[121,1421,168,1782]" captionTargetPageId="7" captionText="Figure 4. Chaetocirratulus bathyalis sp. nov.(A–F), holotype (AM W.52713):(A) anterior end, dorsal view; (B) anterior end ventral view; (C) posterior end, dorsal view; (D) parapodium from an anterior setiger, anterior view; (E) notoacicular spines; (F) neuroacicular spines." figureDoi="http://doi.org/10.5281/zenodo.10414173" httpUri="https://zenodo.org/record/10414173/files/figure.png" pageId="6" pageNumber="255">Fig. 4C</figureCitation>
).
</paragraph>
<paragraph id="8BAF36D7FFCAED45B55EFBF06F86FB4C" blockId="6.[839,1467,1135,1247]" pageId="6" pageNumber="255">
<emphasis id="B964EAC5FFCAED45B55EFBF06F00FB14" bold="true" box="[839,1090,1135,1160]" pageId="6" pageNumber="255">Methyl green staining</emphasis>
. Individual gland cells staining all along body, producing bands of speckles over individual segments; dense concentrations of speckles on peristomium especially last ring and dorsal crest.
</paragraph>
</subSubSection>
<subSubSection id="C30A655CFFCAED45B55EFB756FE4F8A9" pageId="6" pageNumber="255" type="discussion">
<paragraph id="8BAF36D7FFCAED45B55EFB756FE4F8A9" blockId="6.[839,1468,1269,1850]" pageId="6" pageNumber="255">
<emphasis id="B964EAC5FFCAED45B55EFB7568EDFA9E" bold="true" box="[839,943,1269,1293]" pageId="6" pageNumber="255">Remarks</emphasis>
.
<taxonomicName id="4C104D54FFCAED45B5A5FB756F9EFA9E" authority="Blake, 2023" authorityName="Blake" authorityYear="2023" box="[956,1244,1269,1293]" class="Polychaeta" family="Cirratulidae" genus="Chaetocirratulus" kingdom="Animalia" order="Terebellida" pageId="6" pageNumber="255" phylum="Annelida" rank="species" species="bathyalis" status="sp. nov.">
<emphasis id="B964EAC5FFCAED45B5A5FB756F9EFA9E" box="[956,1244,1269,1293]" italics="true" pageId="6" pageNumber="255">Chaetocirratulus bathyalis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A25757BEFFCAED45B2FBFB756E74FA9F" box="[1250,1334,1269,1292]" pageId="6" pageNumber="255" rank="species">sp. nov.</taxonomicNameLabel>
is similar to
<taxonomicName id="4C104D54FFCAED45B55EFA926E4EFAB9" authority="(Hartman, 1978)" baseAuthorityName="Hartman" baseAuthorityYear="1978" box="[839,1292,1298,1322]" class="Polychaeta" family="Cirratulidae" genus="Chaetocirratulus" kingdom="Animalia" order="Terebellida" pageId="6" pageNumber="255" phylum="Annelida" rank="species" species="pinguis">
<emphasis id="B964EAC5FFCAED45B55EFA926F11FAB9" box="[839,1107,1298,1322]" italics="true" pageId="6" pageNumber="255">Chaetocirratulus pinguis</emphasis>
(Hartman, 1978)
</taxonomicName>
from
<collectingCountry id="F3077647FFCAED45B352FA926EF8FAB9" box="[1355,1466,1298,1322]" name="Antarctica" pageId="6" pageNumber="255">Antarctica</collectingCountry>
in having noto- and neuropodial spines from setiger 1. The two species differ in that
<taxonomicName id="4C104D54FFCAED45B281FACD6E48FAF6" baseAuthorityName="Hartman" baseAuthorityYear="1978" box="[1176,1290,1357,1381]" class="Polychaeta" family="Cirratulidae" genus="Chaetocirratulus" kingdom="Animalia" order="Terebellida" pageId="6" pageNumber="255" phylum="Annelida" rank="species" species="pinguis">
<emphasis id="B964EAC5FFCAED45B281FACD6E48FAF6" box="[1176,1290,1357,1381]" italics="true" pageId="6" pageNumber="255">C. pinguis</emphasis>
</taxonomicName>
has a distinctly fusiform body, three weakly developed peristomial rings with no dorsal crest, a shallow mid-dorsal groove along the body but no ventral ridge, and individual segments that are distinctly biannulate (
<bibRefCitation id="EF814B26FFCAED45B232FA426FF2FA49" author="Blake, J. A." box="[1067,1200,1474,1498]" pageId="6" pageNumber="255" pagination="1 - 130" refId="ref11963" refString="Blake, J. A. 2018. Bitentaculate Cirratulidae (Annelida, Polychaeta) collected chiefly during cruises of the R / V Anton Bruun, USNS Eltanin, R / V Hero, RVIB Nathaniel B. Palmer, and R / V Polarstern from the Southern Ocean, Antarctica, and off Western South America. Zootaxa 4537: 1 - 130. https: // doi. org / 10.11646 / zootaxa. 4537.1.1" type="journal article" year="2018">Blake, 2018</bibRefCitation>
). In contrast,
<taxonomicName id="4C104D54FFCAED45B322FA436EF9FA49" authority="Blake, 2023" authorityName="Blake" authorityYear="2023" box="[1339,1467,1474,1498]" class="Polychaeta" family="Cirratulidae" genus="Chaetocirratulus" kingdom="Animalia" order="Terebellida" pageId="6" pageNumber="255" phylum="Annelida" rank="species" species="bathyalis" status="sp. nov.">
<emphasis id="B964EAC5FFCAED45B322FA436EF9FA49" box="[1339,1467,1474,1498]" italics="true" pageId="6" pageNumber="255">C. bathyalis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A25757BEFFCAED45B55EFA6068D8FA64" box="[839,922,1504,1527]" pageId="6" pageNumber="255" rank="species">sp. nov.</taxonomicNameLabel>
has a thickened but not fusiform body, at least two well-developed peristomial rings and a prominent dorsal crest, no mid-dorsal groove but a distinct ventral ridge, and uniannulate segments with numerous transverse wrinkles. In addition, the MG staining pattern differs between the two species: in
<taxonomicName id="4C104D54FFCAED45B5A4F9F36F69F919" baseAuthorityName="Hartman" baseAuthorityYear="1978" box="[957,1067,1651,1674]" class="Polychaeta" family="Cirratulidae" genus="Chaetocirratulus" kingdom="Animalia" order="Terebellida" pageId="6" pageNumber="255" phylum="Annelida" rank="species" species="pinguis">
<emphasis id="B964EAC5FFCAED45B5A4F9F36F69F919" box="[957,1067,1651,1674]" italics="true" pageId="6" pageNumber="255">C. pinguis</emphasis>
</taxonomicName>
the retained stain is largely limited to the pre-setiger region where the prostomium stains lightly and the peristomium stains heavily, especially laterally. In contrast,
<taxonomicName id="4C104D54FFCAED45B5D0F94B6F09F971" authority="Blake, 2023" authorityName="Blake" authorityYear="2023" box="[969,1099,1738,1762]" class="Polychaeta" family="Cirratulidae" genus="Chaetocirratulus" kingdom="Animalia" order="Terebellida" pageId="6" pageNumber="255" phylum="Annelida" rank="species" species="bathyalis" status="sp. nov.">
<emphasis id="B964EAC5FFCAED45B5D0F94B6F09F971" box="[969,1099,1738,1762]" italics="true" pageId="6" pageNumber="255">C. bathyalis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A25757BEFFCAED45B24CF94B6FEBF971" box="[1109,1193,1739,1762]" pageId="6" pageNumber="255" rank="species">sp. nov.</taxonomicNameLabel>
has stain concentrated in individual glands, producing bands of speckles all along the body and dense concentrations of speckles on the last peristomial ring and dorsal crest.
</paragraph>
</subSubSection>
<subSubSection id="C30A655CFFCAED45B55EF8D06E38F816" pageId="6" pageNumber="255" type="etymology">
<paragraph id="8BAF36D7FFCAED45B55EF8D06E38F816" blockId="6.[839,1466,1871,1925]" pageId="6" pageNumber="255">
<emphasis id="B964EAC5FFCAED45B55EF8D06880F8FB" bold="true" box="[839,962,1872,1896]" pageId="6" pageNumber="255">Etymology</emphasis>
. The epithet is from the Greek,
<emphasis id="B964EAC5FFCAED45B315F8CF6E10F8F4" box="[1292,1362,1871,1895]" italics="true" pageId="6" pageNumber="255">bathys</emphasis>
, for deep, in reference to the deep-water habitat of this species.
</paragraph>
</subSubSection>
<subSubSection id="C30A655CFFCAED45B55EF81A6F36F85C" pageId="6" pageNumber="255" type="distribution">
<paragraph id="8BAF36D7FFCAED45B55EF81A6F36F85C" blockId="6.[839,1466,1946,1999]" pageId="6" pageNumber="255">
<emphasis id="B964EAC5FFCAED45B55EF81A6891F821" bold="true" box="[839,979,1946,1970]" pageId="6" pageNumber="255">Distribution</emphasis>
.
<collectingCountry id="F3077647FFCAED45B5FBF81A6F05F821" box="[994,1095,1946,1970]" name="Australia" pageId="6" pageNumber="255">Australia</collectingCountry>
, lower continental slope off
<collectingRegion id="49D4F835FFCAED45B391F81B688DF85C" country="Australia" name="New South Wales" pageId="6" pageNumber="255">New South Wales</collectingRegion>
,
<quantity id="4CE89B32FFCAED45B5C0F8376F32F85C" box="[985,1136,1975,1999]" metricMagnitude="3" metricUnit="m" metricValue="2.479" metricValueMax="2.6339999999999995" metricValueMin="2.324" pageId="6" pageNumber="255" unit="m" value="2479.0" valueMax="2634.0" valueMin="2324.0">2324–2634 m</quantity>
.
</paragraph>
</subSubSection>
</treatment>
</document>
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