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<document id="EF464265EEC29661FAB431568F85C30D" ID-DOI="10.3853/j.2201-4349.75.2023.1827" ID-ISSN="2201-4349" ID-Zenodo-Dep="10414024" IM.bibliography_approvedBy="carolina" IM.illustrations_approvedBy="carolina" IM.materialsCitations_approvedBy="carolina" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="GgImagineBatch,operationResults" IM.taxonomicNames_approvedBy="felipe" IM.treatments_approvedBy="carolina" checkinTime="1703108455257" checkinUser="felipe" docAuthor="Blake, James A." docDate="2023" docId="03A787E9FFED9745FF5CFDF55590FA0C" docLanguage="en" docName="RecAustMus.75.3.271-298.pdf" docOrigin="Records of the Australian Museum (Rec. Aust. Mus.) 75 (3)" docSource="http://dx.doi.org/10.3853/j.2201-4349.75.2023.1827" docStyle="DocumentStyle:997BA24B490466A2F99594A367FA147F.4:RecAustMus.2019-.journal_article.0cover" docStyleId="997BA24B490466A2F99594A367FA147F" docStyleName="RecAustMus.2019-.journal_article.0cover" docStyleVersion="4" docTitle="Oligobregma aristata Blake 2023, sp. nov." docType="treatment" docUuid="FBC20F14-FF28-415C-96A4-023F87F8CD72" docUuidSource="ZooBank" docVersion="4" lastPageNumber="282" masterDocId="FF9EFF91FFE6974EFF86FFEA511AFFC0" masterDocTitle="New Species of Scalibregmatidae (Annelida) from Slope and Abyssal Depths off Eastern Australia" masterLastPageNumber="298" masterPageNumber="271" pageNumber="282" updateTime="1713389595657" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-4.0">
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<mods:title id="A22446039096FA2B7B1046E636CF62FF">New Species of Scalibregmatidae (Annelida) from Slope and Abyssal Depths off Eastern Australia</mods:title>
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<mods:namePart id="3504A11470639E91A304FFB98B2787B2">Blake, James A.</mods:namePart>
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<mods:title id="52A8B680CE628FAD322D37873EC4F911">Records of the Australian Museum</mods:title>
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<mods:date id="F95C1638147FF1A37537764FA6DDCC6D">2023</mods:date>
<mods:detail id="15C014254D1FA0556011DB90D85C3E98" type="series">
<mods:title id="CF0494293CB022C088582011FBAB1842">Rec. Aust. Mus.</mods:title>
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<mods:number id="EBD97ED992DF8070BAC00B615BE357FE">2023-05-17</mods:number>
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<mods:number id="5BC1F60ADFB8ACBCB5503EA2FB853AC7">75</mods:number>
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<mods:number id="0542FA4FCAA1A3413FF4D4E5859836FC">3</mods:number>
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<mods:start id="7C61C4B4E42D264D4D1E181FAAAE452C">271</mods:start>
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<mods:url id="9324944BFA63CBA5151802C2718E4160">http://dx.doi.org/10.3853/j.2201-4349.75.2023.1827</mods:url>
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<mods:classification id="336358C8D5F49CE7854DF22A3C46E2AC">journal article</mods:classification>
<mods:identifier id="C3E03EAD271B4024FEC9EBE85D3455F7" type="DOI">10.3853/j.2201-4349.75.2023.1827</mods:identifier>
<mods:identifier id="22EFF8CCE6CD839ABB2961ABCEEECD1B" type="ISSN">2201-4349</mods:identifier>
<mods:identifier id="C6DDF8BA4EF4050046C0E406DE0F9116" type="Zenodo-Dep">10414024</mods:identifier>
<mods:identifier id="E85F03725818F0CD1B2C2936AF47D9DE" type="ZooBank">7D3BDF25-010F-41A4-AD15-763C3F067D8A</mods:identifier>
</mods:mods>
<treatment id="03A787E9FFED9745FF5CFDF55590FA0C" ID-DOI="http://doi.org/10.5281/zenodo.10989014" ID-Zenodo-Dep="10989014" LSID="urn:lsid:zoobank.org:act:FBC20F14-FF28-415C-96A4-023F87F8CD72" httpUri="http://treatment.plazi.org/id/03A787E9FFED9745FF5CFDF55590FA0C" lastPageNumber="282" pageId="11" pageNumber="282">
<subSubSection id="C3146574FFED9745FF5CFDF553C6FDA2" pageId="11" pageNumber="282" type="nomenclature">
<paragraph id="8BB136FFFFED9745FF5CFDF55391FDFF" blockId="11.[218,651,543,575]" box="[218,651,543,575]" pageId="11" pageNumber="282">
<heading id="D0F98193FFED9745FF5CFDF55391FDFF" bold="true" box="[218,651,543,575]" centered="true" fontSize="12" level="2" pageId="11" pageNumber="282" reason="2">
<emphasis id="B97AEAEDFFED9745FF5CFDF55391FDFF" bold="true" box="[218,651,543,575]" pageId="11" pageNumber="282">
<taxonomicName id="4C0E4D7CFFED9745FF5CFDF5530AFDFE" ID-CoL="BDS5Y" authority="Blake, 2023" authorityName="Blake" authorityYear="2023" box="[218,528,543,574]" class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" kingdom="Animalia" pageId="11" pageNumber="282" phylum="Annelida" rank="species" species="aristata" status="sp. nov.">
<emphasis id="B97AEAEDFFED9745FF5CFDF5530AFDFE" bold="true" box="[218,528,543,574]" italics="true" pageId="11" pageNumber="282">Oligobregma aristata</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A2495796FFED9745FD9CFDCA5391FDFF" box="[538,651,544,575]" pageId="11" pageNumber="282" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
</heading>
</paragraph>
<paragraph id="8BB136FFFFED9745FF0FFDBA53C6FDA2" blockId="11.[137,732,592,610]" box="[137,732,592,610]" pageId="11" pageNumber="282">
<uri id="FF9F3AFDFFED9745FF0FFDBA53C6FDA2" box="[137,732,592,610]" pageId="11" pageNumber="282">
urn:lsid:zoobank.org:act:
<uuid id="FFA80C2AFFED9745FED2FDBA53C6FDA2" box="[340,732,592,610]" pageId="11" pageNumber="282">FBC20F14-FF28-415C-96A4-023F87F8CD72</uuid>
</uri>
</paragraph>
</subSubSection>
<subSubSection id="C3146574FFED9745FEF9FD9550FCFD5A" box="[383,486,639,666]" pageId="11" pageNumber="282" type="description">
<paragraph id="8BB136FFFFED9745FEF9FD9550FCFD5A" blockId="11.[383,486,639,666]" box="[383,486,639,666]" pageId="11" pageNumber="282">
<figureCitation id="13352A7AFFED9745FEF9FD9550FCFD5A" box="[383,486,639,666]" captionStart-0="Figure 5" captionStart-1="Figure 6" captionStartId-0="12.[167,235,1864,1886]" captionStartId-1="13.[121,189,1895,1917]" captionTargetBox-0="[187,1454,166,1847]" captionTargetBox-1="[121,1421,151,1879]" captionTargetId-0="figure-6@12.[167,1467,151,1850]" captionTargetId-1="figure-9@13.[121,1421,151,1879]" captionTargetPageId-0="12" captionTargetPageId-1="13" captionText-0="Figure 5. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) anterior end, dorsal view; (B) anterior end, ventral view; (C) notopodial acicular spines, setiger 1; (D) notopodial acicular spines, setiger 2; (E) furcate seta, setiger 19." captionText-1="Figure 6. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) parapodium, setiger 19, anterior view; (B) dorsal cirrus, setiger 19; (C) ventral cirrus, setiger 19; (D) notopodial acicular spine, setiger 2; (E) furcate seta, setiger 19. A–D, stained with Shirlastain A." figureDoi-0="http://doi.org/10.5281/zenodo.10414034" figureDoi-1="http://doi.org/10.5281/zenodo.10414036" httpUri-0="https://zenodo.org/record/10414034/files/figure.png" httpUri-1="https://zenodo.org/record/10414036/files/figure.png" pageId="11" pageNumber="282">Figs 5–6</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="C3146574FFED9745FFFFFD445039FC53" pageId="11" pageNumber="282" type="materials_examined">
<paragraph id="8BB136FFFFED9745FFFFFD445039FC53" blockId="11.[121,749,686,915]" pageId="11" pageNumber="282">
<materialsCitation id="3B663CA2FFED9745FFFFFD4453F3FCDE" collectingDate="2017-06-04" collectionCode="RV, AM" country="Australia" elevation="4031" latitude="-30.163" location="Hunter Marine Park" longLatPrecision="73" longitude="153.524" municipality="Brenke" pageId="11" pageNumber="282" specimenCount="1" stateProvince="New South Wales" typeStatus="holotype">
<emphasis id="B97AEAEDFFED9745FFFFFD4451FEFD06" bold="true" box="[121,228,686,710]" pageId="11" pageNumber="282">
<typeStatus id="54B5885DFFED9745FFFFFD4451FEFD06" box="[121,228,686,710]" pageId="11" pageNumber="282" type="holotype">Holotype</typeStatus>
</emphasis>
: abyssal plain off
<collectingRegion id="49CAF81DFFED9745FE46FD445395FD06" box="[448,655,686,710]" country="Australia" name="New South Wales" pageId="11" pageNumber="282">New South Wales</collectingRegion>
, eastern
<collectingCountry id="F319766FFFED9745FFFFFD2151C4FD23" box="[121,222,715,739]" name="Australia" pageId="11" pageNumber="282">Australia</collectingCountry>
,
<location id="8ED16024FFED9745FF6CFD2650DCFD23" LSID="urn:lsid:plazi:treatment:03A787E9FFED9745FF5CFDF55590FA0C:8ED16024FFED9745FF6CFD2650DCFD23" box="[234,454,715,739]" country="Australia" latitude="-30.163" longLatPrecision="73" longitude="153.524" municipality="Brenke" name="Hunter Marine Park" pageId="11" pageNumber="282" stateProvince="New South Wales">Hunter Marine Park</location>
,
<collectionCode id="ED1FAE3AFFED9745FE54FD2650EEFD23" box="[466,500,716,739]" country="Italy" name="Collection of Leptospira Strains" pageId="11" pageNumber="282">RV</collectionCode>
<taxonomicName id="4C0E4D7CFFED9745FE7BFD2653ACFD23" authority=", Sta." authorityName="Sta." box="[509,694,715,739]" class="Actinopterygii" family="Nemichthyidae" genus="Investigator" higherTaxonomySource="GBIF" kingdom="Animalia" order="Anguilliformes" pageId="11" pageNumber="282" phylum="Chordata" rank="genus">
<emphasis id="B97AEAEDFFED9745FE7BFD265364FD23" box="[509,638,716,739]" italics="true" pageId="11" pageNumber="282">Investigator</emphasis>
, Sta.
</taxonomicName>
079, coll.
<date id="FFB0103FFFED9745FF35FD035057FCC1" box="[179,333,745,769]" pageId="11" pageNumber="282" value="2017-06-04">
<collectingDate id="EFF4E9D7FFED9745FF35FD035057FCC1" box="[179,333,745,769]" pageId="11" pageNumber="282" value="2017-06-04">04 June 2017</collectingDate>
</date>
,
<collectingMunicipality id="6BD5AC85FFED9745FEDDFD0350B3FCC1" box="[347,425,745,769]" pageId="11" pageNumber="282">Brenke</collectingMunicipality>
sledge,
<geoCoordinate id="EE3A5038FFED9745FD8CFD025375FCC1" box="[522,623,744,769]" degrees="32.527" direction="south" orientation="latitude" pageId="11" pageNumber="282" precision="55" value="-32.527">32.527°S</geoCoordinate>
<geoCoordinate id="EE3A5038FFED9745FDFFFD0253F6FCC0" box="[633,748,744,768]" degrees="153.898" direction="east" orientation="longitude" pageId="11" pageNumber="282" precision="55" value="153.898">153.898°E</geoCoordinate>
to
<geoCoordinate id="EE3A5038FFED9745FF10FCEC51E3FCDE" box="[150,249,774,798]" degrees="30.163" direction="south" orientation="latitude" pageId="11" pageNumber="282" precision="55" value="-30.163">30.163°S</geoCoordinate>
<geoCoordinate id="EE3A5038FFED9745FE86FCEC506EFCDE" box="[256,372,774,798]" degrees="153.524" direction="east" orientation="longitude" pageId="11" pageNumber="282" precision="55" value="153.524">153.524°E</geoCoordinate>
,
<quantity id="4CF69B1AFFED9745FE06FCEC50CFFCDD" box="[384,469,774,798]" metricMagnitude="3" metricUnit="m" metricValue="4.031" pageId="11" pageNumber="282" unit="m" value="4031.0">
<elevation id="0023D1CCFFED9745FE06FCEC50CFFCDD" box="[384,469,774,798]" metricMagnitude="3" metricUnit="m" metricValue="4.031" pageId="11" pageNumber="282" unit="m" value="4031.0">4031 m</elevation>
</quantity>
, Sta. 079 (
<collectionCode id="ED1FAE3AFFED9745FDCFFCEC536CFCDE" box="[585,630,774,798]" country="Australia" name="Australian Museum" pageId="11" pageNumber="282" type="Museum">AM</collectionCode>
W.53900)
</materialsCitation>
.
<materialsCitation id="3B663CA2FFED9745FFFFFCC9503AFC53" collectingDate="2017-05-19" collectionCode="RV" country="Australia" elevation="2793" latitude="-41.721" location="Freycinet Marine Park" longLatPrecision="69" longitude="149.125" pageId="11" pageNumber="282" specimenCount="1" stateProvince="Tasmania" typeStatus="paratype">
<emphasis id="B97AEAEDFFED9745FFFFFCC951FBFCFB" bold="true" box="[121,225,803,827]" pageId="11" pageNumber="282">
<typeStatus id="54B5885DFFED9745FFFFFCC951FBFCFB" box="[121,225,803,827]" pageId="11" pageNumber="282" type="paratype">Paratype</typeStatus>
</emphasis>
(1): lower continental slope off
<collectingRegion id="49CAF81DFFED9745FDA9FCC95382FCFB" box="[559,664,803,827]" country="Australia" name="Tasmania" pageId="11" pageNumber="282">Tasmania</collectingRegion>
, eastern
<collectingCountry id="F319766FFFED9745FFFFFCAB51C4FC99" box="[121,222,833,857]" name="Australia" pageId="11" pageNumber="282">Australia</collectingCountry>
,
<location id="8ED16024FFED9745FF6EFCAB50C1FC99" LSID="urn:lsid:plazi:treatment:03A787E9FFED9745FF5CFDF55590FA0C:8ED16024FFED9745FF6EFCAB50C1FC99" box="[232,475,833,857]" country="Australia" name="Freycinet Marine Park" pageId="11" pageNumber="282" stateProvince="Tasmania">Freycinet Marine Park</location>
,
<collectionCode id="ED1FAE3AFFED9745FE63FCAB531DFC98" box="[485,519,833,856]" country="Italy" name="Collection of Leptospira Strains" pageId="11" pageNumber="282">RV</collectionCode>
<taxonomicName id="4C0E4D7CFFED9745FD88FCAB53DCFC99" authority=", Sta." authorityName="Sta." box="[526,710,833,857]" class="Actinopterygii" family="Nemichthyidae" genus="Investigator" higherTaxonomySource="GBIF" kingdom="Animalia" order="Anguilliformes" pageId="11" pageNumber="282" phylum="Chordata" rank="genus">
<emphasis id="B97AEAEDFFED9745FD88FCAB5395FC98" box="[526,655,833,856]" italics="true" pageId="11" pageNumber="282">Investigator</emphasis>
, Sta.
</taxonomicName>
11, coll.
<date id="FFB0103FFFED9745FF28FCB45025FCB6" box="[174,319,862,886]" pageId="11" pageNumber="282" value="2017-05-19">
<collectingDate id="EFF4E9D7FFED9745FF28FCB45025FCB6" box="[174,319,862,886]" pageId="11" pageNumber="282" value="2017-05-19">19 May 2017</collectingDate>
</date>
, box core,
<geoCoordinate id="EE3A5038FFED9745FE35FCB4530DFCB6" box="[435,535,862,886]" degrees="41.721" direction="south" orientation="latitude" pageId="11" pageNumber="282" precision="55" value="-41.721">41.721°S</geoCoordinate>
<geoCoordinate id="EE3A5038FFED9745FD9BFCB4538BFCB6" box="[541,657,862,886]" degrees="149.125" direction="east" orientation="longitude" pageId="11" pageNumber="282" precision="55" value="149.125">149.125°E</geoCoordinate>
,
<quantity id="4CF69B1AFFED9745FD1AFCB453F7FCB5" box="[668,749,862,886]" metricMagnitude="3" metricUnit="m" metricValue="2.793" pageId="11" pageNumber="282" unit="m" value="2793.0">
<elevation id="0023D1CCFFED9745FD1AFCB453F7FCB5" box="[668,749,862,886]" metricMagnitude="3" metricUnit="m" metricValue="2.793" pageId="11" pageNumber="282" unit="m" value="2793.0">2793 m</elevation>
</quantity>
(
<collectionCode id="ED1FAE3AFFED9745FF06FC9151B7FC53" box="[128,173,891,915]" country="Australia" name="Australian Museum" pageId="11" pageNumber="282" type="Museum">AM</collectionCode>
W.52683)
</materialsCitation>
.
</paragraph>
</subSubSection>
<subSubSection id="C3146574FFED9745FFFFFC4252E8FCAF" pageId="11" pageNumber="282" type="description">
<paragraph id="8BB136FFFFED9745FFFFFC42509DFA2E" blockId="11.[121,749,936,1987]" pageId="11" pageNumber="282">
<emphasis id="B97AEAEDFFED9745FFFFFC4251E7FC00" bold="true" box="[121,253,936,960]" pageId="11" pageNumber="282">Description</emphasis>
.
<typeStatus id="54B5885DFFED9745FE8AFC435075FC01" box="[268,367,937,961]" pageId="11" pageNumber="282" type="holotype">Holotype</typeStatus>
mostly complete, missing pygidial segment, with 23 setigers,
<quantity id="4CF69B1AFFED9745FE01FC2C50F9FC1D" box="[391,483,966,990]" metricMagnitude="-2" metricUnit="m" metricValue="1.3599999999999999" pageId="11" pageNumber="282" unit="mm" value="13.6">13.6 mm</quantity>
long,
<quantity id="4CF69B1AFFED9745FDA7FC2C5375FC1D" box="[545,623,966,990]" metricMagnitude="-3" metricUnit="m" metricValue="1.3" pageId="11" pageNumber="282" unit="mm" value="1.3">1.3 mm</quantity>
wide across first four anterior setigers,
<quantity id="4CF69B1AFFED9745FE1EFC0950E2FC3B" box="[408,504,995,1019]" metricMagnitude="-3" metricUnit="m" metricValue="2.32" pageId="11" pageNumber="282" unit="mm" value="2.32">2.32 mm</quantity>
wide across expanded middle setigers.
<typeStatus id="54B5885DFFED9745FEBEFBEB5083FBD9" box="[312,409,1025,1049]" pageId="11" pageNumber="282" type="paratype">Paratype</typeStatus>
smaller but incomplete, with middle segments removed for DNA analysis. Setigers 1–4 narrow (
<figureCitation id="13352A7AFFED9745FF57FBD1505AFB93" box="[209,320,1083,1107]" captionStart="Figure 5" captionStartId="12.[167,235,1864,1886]" captionTargetBox="[187,1454,166,1847]" captionTargetId="figure-6@12.[167,1467,151,1850]" captionTargetPageId="12" captionText="Figure 5. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) anterior end, dorsal view; (B) anterior end, ventral view; (C) notopodial acicular spines, setiger 1; (D) notopodial acicular spines, setiger 2; (E) furcate seta, setiger 19." figureDoi="http://doi.org/10.5281/zenodo.10414034" httpUri="https://zenodo.org/record/10414034/files/figure.png" pageId="11" pageNumber="282">Fig. 5A, B</figureCitation>
), body expanded from setigers 5–10 then narrowing to posterior end. Body with transverse rows of raised pads best observed on setigers 1–4 (
<figureCitation id="13352A7AFFED9745FDC5FB9C53ACFB4E" box="[579,694,1142,1166]" captionStart="Figure 5" captionStartId="12.[167,235,1864,1886]" captionTargetBox="[187,1454,166,1847]" captionTargetId="figure-6@12.[167,1467,151,1850]" captionTargetPageId="12" captionText="Figure 5. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) anterior end, dorsal view; (B) anterior end, ventral view; (C) notopodial acicular spines, setiger 1; (D) notopodial acicular spines, setiger 2; (E) furcate seta, setiger 19." figureDoi="http://doi.org/10.5281/zenodo.10414034" httpUri="https://zenodo.org/record/10414034/files/figure.png" pageId="11" pageNumber="282">Fig. 5A, B</figureCitation>
) and 11–22; pads in 4–5 rows on expanded middle segments, but obscured by stretching, best seen ventrally. Dorsally, setiger 1 with a single enlarged medial dorsal pad; setiger 2 with a row of large pads; setigers 3–4 with three transverse rows of pads (
<figureCitation id="13352A7AFFED9745FF07FAE351CDFAE0" box="[129,215,1288,1313]" captionStart="Figure 5" captionStartId="12.[167,235,1864,1886]" captionTargetBox="[187,1454,166,1847]" captionTargetId="figure-6@12.[167,1467,151,1850]" captionTargetPageId="12" captionText="Figure 5. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) anterior end, dorsal view; (B) anterior end, ventral view; (C) notopodial acicular spines, setiger 1; (D) notopodial acicular spines, setiger 2; (E) furcate seta, setiger 19." figureDoi="http://doi.org/10.5281/zenodo.10414034" httpUri="https://zenodo.org/record/10414034/files/figure.png" pageId="11" pageNumber="282">Fig. 5A</figureCitation>
); setigers 11–22 with 3–4 narrow transverse rows of pads. Ventrally with a single transverse pad on setiger 1, setigers 2–3 with three rows of pads; setiger 4 with two rows of pads (
<figureCitation id="13352A7AFFED9745FF5CFA8B502AFAB8" box="[218,304,1376,1401]" captionStart="Figure 5" captionStartId="12.[167,235,1864,1886]" captionTargetBox="[187,1454,166,1847]" captionTargetId="figure-6@12.[167,1467,151,1850]" captionTargetPageId="12" captionText="Figure 5. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) anterior end, dorsal view; (B) anterior end, ventral view; (C) notopodial acicular spines, setiger 1; (D) notopodial acicular spines, setiger 2; (E) furcate seta, setiger 19." figureDoi="http://doi.org/10.5281/zenodo.10414034" httpUri="https://zenodo.org/record/10414034/files/figure.png" pageId="11" pageNumber="282">Fig. 5B</figureCitation>
); prominent mid-ventral ridge extending from setiger 1 to end; ridge interrupts transverse rows of pads at each segmental boundary (
<figureCitation id="13352A7AFFED9745FD8FFA71537FFA73" box="[521,613,1435,1459]" captionStart="Figure 5" captionStartId="12.[167,235,1864,1886]" captionTargetBox="[187,1454,166,1847]" captionTargetId="figure-6@12.[167,1467,151,1850]" captionTargetPageId="12" captionText="Figure 5. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) anterior end, dorsal view; (B) anterior end, ventral view; (C) notopodial acicular spines, setiger 1; (D) notopodial acicular spines, setiger 2; (E) furcate seta, setiger 19." figureDoi="http://doi.org/10.5281/zenodo.10414034" httpUri="https://zenodo.org/record/10414034/files/figure.png" pageId="11" pageNumber="282">Fig. 5B</figureCitation>
). Branchiae absent; posterior end not present on either specimen. Colour in alcohol, opaque white.
</paragraph>
<paragraph id="8BB136FFFFED9745FF11FA195040F848" blockId="11.[121,749,936,1987]" pageId="11" pageNumber="282">
Prostomium broadly curved across anterior margin, weakly expanded laterally, dorsally narrowing posteriorly producing V-shape (
<figureCitation id="13352A7AFFED9745FEF6F9C450C8F986" box="[368,466,1582,1606]" captionStart="Figure 5" captionStartId="12.[167,235,1864,1886]" captionTargetBox="[187,1454,166,1847]" captionTargetId="figure-6@12.[167,1467,151,1850]" captionTargetPageId="12" captionText="Figure 5. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) anterior end, dorsal view; (B) anterior end, ventral view; (C) notopodial acicular spines, setiger 1; (D) notopodial acicular spines, setiger 2; (E) furcate seta, setiger 19." figureDoi="http://doi.org/10.5281/zenodo.10414034" httpUri="https://zenodo.org/record/10414034/files/figure.png" pageId="11" pageNumber="282">Fig. 5A</figureCitation>
); merging with narrow peristomium; with two short, rounded lobes emerging subapically from anterior margin and extending forward forming a pair of short frontal horns (
<figureCitation id="13352A7AFFED9745FE7DF96C5371F95E" box="[507,619,1670,1694]" captionStart="Figure 5" captionStartId="12.[167,235,1864,1886]" captionTargetBox="[187,1454,166,1847]" captionTargetId="figure-6@12.[167,1467,151,1850]" captionTargetPageId="12" captionText="Figure 5. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) anterior end, dorsal view; (B) anterior end, ventral view; (C) notopodial acicular spines, setiger 1; (D) notopodial acicular spines, setiger 2; (E) furcate seta, setiger 19." figureDoi="http://doi.org/10.5281/zenodo.10414034" httpUri="https://zenodo.org/record/10414034/files/figure.png" pageId="11" pageNumber="282">Fig. 5A, B</figureCitation>
), both horns with groove or notch producing weak bilobed appearance (
<figureCitation id="13352A7AFFED9745FF07F92B51EAF919" box="[129,240,1728,1753]" captionStart="Figure 5" captionStartId="12.[167,235,1864,1886]" captionTargetBox="[187,1454,166,1847]" captionTargetId="figure-6@12.[167,1467,151,1850]" captionTargetPageId="12" captionText="Figure 5. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) anterior end, dorsal view; (B) anterior end, ventral view; (C) notopodial acicular spines, setiger 1; (D) notopodial acicular spines, setiger 2; (E) furcate seta, setiger 19." figureDoi="http://doi.org/10.5281/zenodo.10414034" httpUri="https://zenodo.org/record/10414034/files/figure.png" pageId="11" pageNumber="282">Fig. 5A, B</figureCitation>
); eyes absent; nuchal organs visible as numerous fine cilia between posterior lateral margin of prostomium and narrow peristomial ring. Peristomium a single ring (
<figureCitation id="13352A7AFFED9745FD08F91153FAF8D3" box="[654,736,1787,1811]" captionStart="Figure 5" captionStartId="12.[167,235,1864,1886]" captionTargetBox="[187,1454,166,1847]" captionTargetId="figure-6@12.[167,1467,151,1850]" captionTargetPageId="12" captionText="Figure 5. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) anterior end, dorsal view; (B) anterior end, ventral view; (C) notopodial acicular spines, setiger 1; (D) notopodial acicular spines, setiger 2; (E) furcate seta, setiger 19." figureDoi="http://doi.org/10.5281/zenodo.10414034" httpUri="https://zenodo.org/record/10414034/files/figure.png" pageId="11" pageNumber="282">Fig. 5A</figureCitation>
), dorsally merging with posterior margin of prostomium and ventrally forming lips of mouth with two anterior lobes, two lateral lobes, and about eight short narrow posterior lobes or papillae (
<figureCitation id="13352A7AFFED9745FF7FF89B5051F848" box="[249,331,1904,1929]" captionStart="Figure 5" captionStartId="12.[167,235,1864,1886]" captionTargetBox="[187,1454,166,1847]" captionTargetId="figure-6@12.[167,1467,151,1850]" captionTargetPageId="12" captionText="Figure 5. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) anterior end, dorsal view; (B) anterior end, ventral view; (C) notopodial acicular spines, setiger 1; (D) notopodial acicular spines, setiger 2; (E) furcate seta, setiger 19." figureDoi="http://doi.org/10.5281/zenodo.10414034" httpUri="https://zenodo.org/record/10414034/files/figure.png" pageId="11" pageNumber="282">Fig. 5B</figureCitation>
).
</paragraph>
<paragraph id="8BB136FFFFED9745FF11F86455BEFEBD" blockId="11.[121,749,936,1987]" lastBlockId="11.[794,1422,151,880]" pageId="11" pageNumber="282">
Parapodia with short, conical-shaped podial lobes from setigers 1–10, from setiger 11 lobes becoming longer, developing prominent dorsal and ventral cirri (
<figureCitation id="13352A7AFFED9745FAA1FF7D549BFF6F" box="[1319,1409,151,175]" captionStart="Figure 6" captionStartId="13.[121,189,1895,1917]" captionTargetBox="[121,1421,151,1879]" captionTargetId="figure-9@13.[121,1421,151,1879]" captionTargetPageId="13" captionText="Figure 6. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) parapodium, setiger 19, anterior view; (B) dorsal cirrus, setiger 19; (C) ventral cirrus, setiger 19; (D) notopodial acicular spine, setiger 2; (E) furcate seta, setiger 19. A–D, stained with Shirlastain A." figureDoi="http://doi.org/10.5281/zenodo.10414036" httpUri="https://zenodo.org/record/10414036/files/figure.png" pageId="11" pageNumber="282">Fig. 6A</figureCitation>
); dorsal cirri broad, globular, tapering to nipple-like rounded tip directed dorsally (
<figureCitation id="13352A7AFFED9745FB80FF385547FF2A" box="[1030,1117,210,234]" captionStart="Figure 6" captionStartId="13.[121,189,1895,1917]" captionTargetBox="[121,1421,151,1879]" captionTargetId="figure-9@13.[121,1421,151,1879]" captionTargetPageId="13" captionText="Figure 6. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) parapodium, setiger 19, anterior view; (B) dorsal cirrus, setiger 19; (C) ventral cirrus, setiger 19; (D) notopodial acicular spine, setiger 2; (E) furcate seta, setiger 19. A–D, stained with Shirlastain A." figureDoi="http://doi.org/10.5281/zenodo.10414036" httpUri="https://zenodo.org/record/10414036/files/figure.png" pageId="11" pageNumber="282">Fig. 6B</figureCitation>
); ventral cirri asymmetrical with broad basal attachment bearing anteriorly directed nipple-like tip (
<figureCitation id="13352A7AFFED9745FC47FEE7550CFEE5" box="[961,1046,269,293]" captionStart="Figure 6" captionStartId="13.[121,189,1895,1917]" captionTargetBox="[121,1421,151,1879]" captionTargetId="figure-9@13.[121,1421,151,1879]" captionTargetPageId="13" captionText="Figure 6. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) parapodium, setiger 19, anterior view; (B) dorsal cirrus, setiger 19; (C) ventral cirrus, setiger 19; (D) notopodial acicular spine, setiger 2; (E) furcate seta, setiger 19. A–D, stained with Shirlastain A." figureDoi="http://doi.org/10.5281/zenodo.10414036" httpUri="https://zenodo.org/record/10414036/files/figure.png" pageId="11" pageNumber="282">Fig. 6C</figureCitation>
); both dorsal and ventral cirri with lattice-like glandular cells encompassing entire cirrus and nipple-like tips; rounded button-like interramal papilla present (
<figureCitation id="13352A7AFFED9745FCF0FE8F52D1FEBD" box="[886,971,357,381]" captionStart="Figure 6" captionStartId="13.[121,189,1895,1917]" captionTargetBox="[121,1421,151,1879]" captionTargetId="figure-9@13.[121,1421,151,1879]" captionTargetPageId="13" captionText="Figure 6. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) parapodium, setiger 19, anterior view; (B) dorsal cirrus, setiger 19; (C) ventral cirrus, setiger 19; (D) notopodial acicular spine, setiger 2; (E) furcate seta, setiger 19. A–D, stained with Shirlastain A." figureDoi="http://doi.org/10.5281/zenodo.10414036" httpUri="https://zenodo.org/record/10414036/files/figure.png" pageId="11" pageNumber="282">Fig. 6A</figureCitation>
), cilia not observed.
</paragraph>
<paragraph id="8BB136FFFFED9745FCBEFE6952E8FCAF" blockId="11.[794,1422,151,880]" pageId="11" pageNumber="282">
Heavy curved acicular spines present in both noto- and neuropodia of setigers 1‒3 (
<figureCitation id="13352A7AFFED9745FBE7FE7555F8FE78" box="[1121,1250,415,440]" captionStart="Figure 5" captionStartId="12.[167,235,1864,1886]" captionTargetBox="[187,1454,166,1847]" captionTargetId="figure-6@12.[167,1467,151,1850]" captionTargetPageId="12" captionText="Figure 5. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) anterior end, dorsal view; (B) anterior end, ventral view; (C) notopodial acicular spines, setiger 1; (D) notopodial acicular spines, setiger 2; (E) furcate seta, setiger 19." figureDoi="http://doi.org/10.5281/zenodo.10414034" httpUri="https://zenodo.org/record/10414034/files/figure.png" pageId="11" pageNumber="282">Fig. 5A, B</figureCitation>
); notopodia of setigers 1–2 with 4–5 spines in first and second rows and 2–3 long capillaries in second row, setiger 3 with 3–4 spines in first row and all capillaries in second row. Neuropodia of setigers 1–2 with 3‒4 spines in anterior and posterior rows, accompanied by a few capillaries; setiger 3 with 3–4 spines in first row and all capillaries in second row. Setiger 4 with all capillaries in two rows of both noto- and neuropodia. Individual spines curved, narrowing to pointed tip bearing distinct arista (
<figureCitation id="13352A7AFFED9745FC32FD4D5533FD7F" box="[948,1065,679,703]" captionStart="Figure 5" captionStartId="12.[167,235,1864,1886]" captionTargetBox="[187,1454,166,1847]" captionTargetId="figure-6@12.[167,1467,151,1850]" captionTargetPageId="12" captionText="Figure 5. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) anterior end, dorsal view; (B) anterior end, ventral view; (C) notopodial acicular spines, setiger 1; (D) notopodial acicular spines, setiger 2; (E) furcate seta, setiger 19." figureDoi="http://doi.org/10.5281/zenodo.10414034" httpUri="https://zenodo.org/record/10414034/files/figure.png" pageId="11" pageNumber="282">Figs 5C, D</figureCitation>
,
<figureCitation id="13352A7AFFED9745FBB2FD4D5542FD7F" box="[1076,1112,679,703]" captionStart="Figure 6" captionStartId="13.[121,189,1895,1917]" captionTargetBox="[121,1421,151,1879]" captionTargetId="figure-9@13.[121,1421,151,1879]" captionTargetPageId="13" captionText="Figure 6. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) parapodium, setiger 19, anterior view; (B) dorsal cirrus, setiger 19; (C) ventral cirrus, setiger 19; (D) notopodial acicular spine, setiger 2; (E) furcate seta, setiger 19. A–D, stained with Shirlastain A." figureDoi="http://doi.org/10.5281/zenodo.10414036" httpUri="https://zenodo.org/record/10414036/files/figure.png" pageId="11" pageNumber="282">6D</figureCitation>
). Short spinous setae anterior to heavy spines or capillaries absent. Furcate setae short, first present from setiger 5 anterior to long capillaries; furcate setae of posterior setigers longer, spine-like, more numerous, ten or more per noto- and neuropodium (
<figureCitation id="13352A7AFFED9745FB55FCF75433FCF5" box="[1235,1321,797,821]" captionStart="Figure 6" captionStartId="13.[121,189,1895,1917]" captionTargetBox="[121,1421,151,1879]" captionTargetId="figure-9@13.[121,1421,151,1879]" captionTargetPageId="13" captionText="Figure 6. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) parapodium, setiger 19, anterior view; (B) dorsal cirrus, setiger 19; (C) ventral cirrus, setiger 19; (D) notopodial acicular spine, setiger 2; (E) furcate seta, setiger 19. A–D, stained with Shirlastain A." figureDoi="http://doi.org/10.5281/zenodo.10414036" httpUri="https://zenodo.org/record/10414036/files/figure.png" pageId="11" pageNumber="282">Fig. 6A</figureCitation>
). Furcate setae with long unequal tynes bearing short bristles tween tynes (
<figureCitation id="13352A7AFFED9745FCE6FCBD52A3FCAF" box="[864,953,855,879]" captionStart="Figure 5" captionStartId="12.[167,235,1864,1886]" captionTargetBox="[187,1454,166,1847]" captionTargetId="figure-6@12.[167,1467,151,1850]" captionTargetPageId="12" captionText="Figure 5. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) anterior end, dorsal view; (B) anterior end, ventral view; (C) notopodial acicular spines, setiger 1; (D) notopodial acicular spines, setiger 2; (E) furcate seta, setiger 19." figureDoi="http://doi.org/10.5281/zenodo.10414034" httpUri="https://zenodo.org/record/10414034/files/figure.png" pageId="11" pageNumber="282">Figs 5A</figureCitation>
,
<figureCitation id="13352A7AFFED9745FC42FCBD52FFFCAF" box="[964,997,855,879]" captionStart="Figure 6" captionStartId="13.[121,189,1895,1917]" captionTargetBox="[121,1421,151,1879]" captionTargetId="figure-9@13.[121,1421,151,1879]" captionTargetPageId="13" captionText="Figure 6. Oligobregma aristata sp. nov. Holotype (AM W.53990): (A) parapodium, setiger 19, anterior view; (B) dorsal cirrus, setiger 19; (C) ventral cirrus, setiger 19; (D) notopodial acicular spine, setiger 2; (E) furcate seta, setiger 19. A–D, stained with Shirlastain A." figureDoi="http://doi.org/10.5281/zenodo.10414036" httpUri="https://zenodo.org/record/10414036/files/figure.png" pageId="11" pageNumber="282">6E</figureCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="C3146574FFED9745FC9CFC6F52D8FADA" pageId="11" pageNumber="282" type="discussion">
<paragraph id="8BB136FFFFED9745FC9CFC6F52D8FADA" blockId="11.[793,1423,901,1306]" pageId="11" pageNumber="282">
<emphasis id="B97AEAEDFFED9745FC9CFC6F5298FC5D" bold="true" box="[794,898,901,925]" pageId="11" pageNumber="282">Remarks</emphasis>
.
<taxonomicName id="4C0E4D7CFFED9745FC08FC6F556FFC5D" authority="Blake, 2023" authorityName="Blake" authorityYear="2023" box="[910,1141,901,925]" class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" kingdom="Animalia" pageId="11" pageNumber="282" phylum="Annelida" rank="species" species="aristata" status="sp. nov.">
<emphasis id="B97AEAEDFFED9745FC08FC6F556FFC5D" box="[910,1141,901,925]" italics="true" pageId="11" pageNumber="282">Oligobregma aristata</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A2495796FFED9745FBFDFC6F55D7FC5C" box="[1147,1229,901,924]" pageId="11" pageNumber="282" rank="species">sp. nov.</taxonomicNameLabel>
differs from other species off eastern
<collectingCountry id="F319766FFFED9745FC5EFC48552DFC7A" box="[984,1079,930,954]" name="Australia" pageId="11" pageNumber="282">Australia</collectingCountry>
in having anterior acicular spines with an aristate-like tip. In addition, the short frontal horns of the
<typeStatus id="54B5885DFFED9745FCE7FC3752A4FC35" box="[865,958,989,1013]" pageId="11" pageNumber="282" type="holotype">holotype</typeStatus>
are distinctly notched or weakly bifid and the dorsal and ventral cirri of posterior parapodia are inflated and have nipple-like tips. Such frontal horns and dorsal and ventral cirri have not been observed previously in other scalibregmatids. The only other species of
<taxonomicName id="4C0E4D7CFFED9745FB78FBB85497FBAA" authorityName="Kudenov and Blake" authorityYear="1978" box="[1278,1421,1106,1130]" class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" kingdom="Animalia" pageId="11" pageNumber="282" phylum="Annelida" rank="genus">
<emphasis id="B97AEAEDFFED9745FB78FBB85497FBAA" box="[1278,1421,1106,1130]" italics="true" pageId="11" pageNumber="282">Oligobregma</emphasis>
</taxonomicName>
reported with aristate acicular spines is
<taxonomicName id="4C0E4D7CFFED9745FB35FB9A5255FB65" authority="Blake, 2015" authorityName="Blake" authorityYear="2015" class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" kingdom="Animalia" pageId="11" pageNumber="282" phylum="Annelida" rank="species" species="mucronata">
<emphasis id="B97AEAEDFFED9745FB35FB9A545EFB47" box="[1203,1348,1136,1159]" italics="true" pageId="11" pageNumber="282">O. mucronata</emphasis>
<bibRefCitation id="EF9F4B0EFFED9745FACFFB855255FB65" author="Blake, J. A." pageId="11" pageNumber="282" pagination="57 - 93" refId="ref16074" refString="Blake, J. A. 2015. New species of Scalibregmatidae (Annelida, Polychaeta) from the East Antarctic Peninsula including a description of the ecology and post-larval development of species of Scalibregma and Oligobregma. Zootaxa 4033 (1): 57 - 93." type="journal article" year="2015">Blake, 2015</bibRefCitation>
</taxonomicName>
from the East Antarctic Peninsula in upper slope or bathyal depths less than
<quantity id="4CF69B1AFFED9745FBA0FB405566FB02" box="[1062,1148,1194,1218]" metricMagnitude="3" metricUnit="m" metricValue="1.0" pageId="11" pageNumber="282" unit="m" value="1000.0">1000 m</quantity>
. However,
<taxonomicName id="4C0E4D7CFFED9745FB7EFB415494FB02" authorityName="Blake" authorityYear="2015" box="[1272,1422,1195,1218]" class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" kingdom="Animalia" pageId="11" pageNumber="282" phylum="Annelida" rank="species" species="mucronata">
<emphasis id="B97AEAEDFFED9745FB7EFB415494FB02" box="[1272,1422,1195,1218]" italics="true" pageId="11" pageNumber="282">O. mucronata</emphasis>
</taxonomicName>
has triangular-shaped dorsal and ventral cirri that taper to pointed tips instead of swollen asymmetrical cirri with nipple-like tips.
</paragraph>
</subSubSection>
<subSubSection id="C3146574FFED9745FC9CFADA5547FA42" pageId="11" pageNumber="282" type="etymology">
<paragraph id="8BB136FFFFED9745FC9CFADA5547FA42" blockId="11.[793,1421,1327,1410]" pageId="11" pageNumber="282">
<emphasis id="B97AEAEDFFED9745FC9CFADA5289FA88" bold="true" box="[794,915,1328,1352]" pageId="11" pageNumber="282">Etymology</emphasis>
. The epithet is from
<emphasis id="B97AEAEDFFED9745FBE2FADA55BBFA87" box="[1124,1185,1328,1351]" italics="true" pageId="11" pageNumber="282">arista</emphasis>
, Latin for long pointed awn (of grasses) or ear; in reference to the pointed tip of the acicular spines of this species.
</paragraph>
</subSubSection>
<subSubSection id="C3146574FFED9745FC9CFA7D5590FA0C" pageId="11" pageNumber="282" type="distribution">
<paragraph id="8BB136FFFFED9745FC9CFA7D5590FA0C" blockId="11.[794,1421,1431,1485]" pageId="11" pageNumber="282">
<emphasis id="B97AEAEDFFED9745FC9CFA7D52BFFA6F" bold="true" box="[794,933,1431,1455]" pageId="11" pageNumber="282">Distribution</emphasis>
. Off eastern
<collectingCountry id="F319766FFFED9745FBAAFA7D5594FA6F" box="[1068,1166,1431,1455]" name="Australia" pageId="11" pageNumber="282">Australia</collectingCountry>
lower continental slope and abyssal depths,
<quantity id="4CF69B1AFFED9745FC69FA5F559CFA0C" box="[1007,1158,1461,1485]" metricMagnitude="3" metricUnit="m" metricValue="3.412" metricValueMax="4.031" metricValueMin="2.793" pageId="11" pageNumber="282" unit="m" value="3412.0" valueMax="4031.0" valueMin="2793.0">2793–4031 m</quantity>
.
</paragraph>
</subSubSection>
</treatment>
</document>
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