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<document ID-CLB-Dataset="25053" ID-DOI="http://dx.doi.org/10.3897/zookeys.883.36193" ID-GBIF-Dataset="4f6d7148-d281-4073-8bc1-24ce51c3717b" ID-PMC="PMC6828828" ID-Pensoft-Pub="1313-2970-883-1" ID-Pensoft-UUID="EAC9B5058CE55C5AA9A344F6FEFA25D5" ID-PubMed="31719773" ID-ZooBank="7ABDE7F0DD424B968A1380E1E59B1515" ModsDocID="1313-2970-883-1" checkinTime="1572422626326" checkinUser="pensoft" docAuthor="Wiklund, Helena, Neal, Lenka, Glover, Adrian G., Drennan, Regan, Muriel Rabone, &amp; Dahlgren, Thomas G." docDate="2019" docId="553830CFABB9572E93ECA8BA7DB544E5" docLanguage="en" docName="ZooKeys 883: 1-82" docOrigin="ZooKeys 883" docSource="http://dx.doi.org/10.3897/zookeys.883.36193" docTitle="Oligobregma brasierae Wiklund, Neal, Glover, Drennan, Rabone &amp; Dahlgren, 2019, sp. nov." docType="treatment" docUuid="2FC2E16E-1463-4D6A-B3C1-90FEDFB222BC" docUuidSource="ZooBank" docVersion="7" id="EAC9B5058CE55C5AA9A344F6FEFA25D5" lastPageNumber="1" masterDocId="EAC9B5058CE55C5AA9A344F6FEFA25D5" masterDocTitle="Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: Annelida: Capitellidae, Opheliidae, Scalibregmatidae, and Travisiidae" masterLastPageNumber="82" masterPageNumber="1" pageNumber="1" updateTime="1732936696725" updateUser="ExternalLinkService">
<mods:mods id="4728DA275F8B429D1280A5A5CFE91B33" xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo id="152C83D6063449E315A391CFD5D7EFAD">
<mods:title id="27710B61744B776F2EBB2040C303D997">Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: Annelida: Capitellidae, Opheliidae, Scalibregmatidae, and Travisiidae</mods:title>
</mods:titleInfo>
<mods:name id="B65981F4CD0D5F0DC457AAD0D688CBCE" type="personal">
<mods:role id="B2E4EAFE853270079236780CB3C19D19">
<mods:roleTerm id="C9B28ABEAEE5ABEBD742295CFF9AAF05">Author</mods:roleTerm>
</mods:role>
<mods:namePart id="62559782AC852578C7AFB2F4804E6027">Wiklund, Helena</mods:namePart>
</mods:name>
<mods:name id="AB6E546676D5A13F92764E82DBDB6A76" type="personal">
<mods:role id="8B74F297DC6E91D2448153AC9E9BF2AB">
<mods:roleTerm id="BD1B744C418B518BF74263CE28BAF9E5">Author</mods:roleTerm>
</mods:role>
<mods:namePart id="75B333067092EC3D039EE0907E9616F5">Neal, Lenka</mods:namePart>
</mods:name>
<mods:name id="B30098DBFCE9036D6546373BBD22D909" type="personal">
<mods:role id="B55E12C092FA57D2160224EA20EFF9B2">
<mods:roleTerm id="3A2F4018517B4B3CEB7DBA07236C905F">Author</mods:roleTerm>
</mods:role>
<mods:namePart id="C1EAEA1EF1553E376D938D9C2F77CDE2">Glover, Adrian G.</mods:namePart>
</mods:name>
<mods:name id="8C4D5BC512C304E52E3A4376D3676286" type="personal">
<mods:role id="FC7A493A7F88CF05677A422B240D95D5">
<mods:roleTerm id="C612942F9350C712071B386A396E4319">Author</mods:roleTerm>
</mods:role>
<mods:namePart id="9B91E07144975CEFDAEFDB334B216228">Drennan, Regan</mods:namePart>
</mods:name>
<mods:name id="15751AA479B4A89443EC18E6F79A8016" type="personal">
<mods:role id="3100C9046EDE91A9B174D737AED18FCD">
<mods:roleTerm id="14943C89F345710A2981347B0E02C6BE">Author</mods:roleTerm>
</mods:role>
<mods:namePart id="BF027EE22C9EB1984D902EE2378DCE0D">Muriel Rabone,</mods:namePart>
</mods:name>
<mods:name id="E647280F61B78DDA9F86868ED7106D02" type="personal">
<mods:role id="918F1C9505E8684944EEA99B8F5EF598">
<mods:roleTerm id="E9749396E08B645C2A3B7B8704EB2871">Author</mods:roleTerm>
</mods:role>
<mods:namePart id="50E3AA4EB4C8D69E32FED38E94B8F992">Dahlgren, Thomas G.</mods:namePart>
</mods:name>
<mods:typeOfResource id="180938AE3F4EDA5C172F9FE90CF79BA6">text</mods:typeOfResource>
<mods:relatedItem id="02379120B8DBDBD2A902B60B69DE7BA9" type="host">
<mods:titleInfo id="66B153BA4DAC2DCF81E47A42AE646341">
<mods:title id="EBB283512326D2348091B3546DE2CC28">ZooKeys</mods:title>
</mods:titleInfo>
<mods:part id="BA409940965C74D81570110C80D48B5F">
<mods:date id="90876ADA574B38A7159226C5AC325F19">2019</mods:date>
<mods:detail id="47CD51D0E5DB5F0BB00EDD68B8199698" type="volume">
<mods:number id="3A4E2F06BF1201ED2CA0AA6B8FC1FF60">883</mods:number>
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<mods:start id="C4906236AD4282AE8AF022F2E6B648DE">1</mods:start>
<mods:end id="8A1CA0ACF75532E6DE332B63E3255DAF">82</mods:end>
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<mods:location id="9F8128CAECD0374984A4F30583C0329D">
<mods:url id="D53158B781668C0EED582DC0580E9745">http://dx.doi.org/10.3897/zookeys.883.36193</mods:url>
</mods:location>
<mods:classification id="3EF5EA2BB961DA65068DF70709F2B1F7">journal article</mods:classification>
<mods:identifier id="020D9DA092B8C2C03F98D6E87F0AC7FE" type="DOI">http://dx.doi.org/10.3897/zookeys.883.36193</mods:identifier>
<mods:identifier id="6A889CFE1E228549E06A2A34B037BFC9" type="Pensoft-Pub">1313-2970-883-1</mods:identifier>
<mods:identifier id="CD5A6D9CF1B51B16CAC43FA6206BC6C0" type="ZooBank">7ABDE7F0DD424B968A1380E1E59B1515</mods:identifier>
<mods:identifier id="23F4BF76F7F3D2F4549A1629095B48A3" type="Pensoft-UUID">EAC9B5058CE55C5AA9A344F6FEFA25D5</mods:identifier>
</mods:mods>
<treatment id="553830CFABB9572E93ECA8BA7DB544E5" ID-GBIF-Taxon="159909645" LSID="urn:lsid:zoobank.org:act:2FC2E16E-1463-4D6A-B3C1-90FEDFB222BC" httpUri="http://treatment.plazi.org/id/553830CFABB9572E93ECA8BA7DB544E5" lastPageNumber="1" pageId="0" pageNumber="1" scope_family="Opheliidae" scope_phylum="Annelida">
<subSubSection id="1A858EB960C91CD4DF93D760F6FB11F7" pageId="0" pageNumber="1" type="nomenclature">
<paragraph id="3972ADE31D8FE51B5620F526C9509531" pageId="0" pageNumber="1">
<taxonomicName id="27C211854E0C2EB75EE5F63C1E00A9AE" LSID="553830CF-ABB9-572E-93EC-A8BA7DB544E5" family="Capitellidae" genus="Oligobregma" higherTaxonomySource="treatment-meta" kingdom="Animalia" lsidName="Oligobregma brasierae" order="Capitellida" pageId="0" pageNumber="1" rank="species" species="brasierae">Oligobregma brasierae</taxonomicName>
<taxonomicNameLabel id="C302B3C1E5AEECDECBFBFD4DAF82B315" pageId="0" pageNumber="1">sp. nov.</taxonomicNameLabel>
<figureCitation id="D0FABEEEFF6089CE9DED7BD062348E63" captionStart="Figure 24" captionStartId="F24" captionText="Figure 24. Oligobregma brasierae sp. nov. A Lab image, whole specimen (holotype [specimen NHM _ 823], pre-staining) B Lab image, dorsal anterior (holotype, faded stain, h = prostomial horns, pe = peristomial ring) C Lab image, dorsal segments, quadriannulate chaetigers (holotype, faded stain) D Lab image, ventral segments (holotype, faded stain, vm = ventral midline) E Lab image, ventral anterior, (holotype, pre-staining) F Lab image, mid-body parapodia (holotype, shirlastained, dc = dorsal cirrus, vc = ventral cirrus, ip = interramal papilla) G Lab image, detail of dorsal cirrus (paratype NHM _ 684, ig = internal gland) H Lab image, detail of hirstute notopodial spines on chaetiger 1 (paratype NHM _ 684, ig = internal gland) I Lab image, detail of capillary and lyrate chaetae (paratype NHM _ 684) J Lab images, posterior (paratype NHM _ 684, [bottom-left panel], ac = anal cirri, ig = internal gland). Morphological features in plates B-D, F, G, H have been outlined with a fine white or black line to improve clarity of those features. Scale bars: 1 mm (A, E); 50 μm (G); 25 μm (H, I); 100 μm (J)." figureDoi="10.3897/zookeys.883.36193.figure24" httpUri="https://binary.pensoft.net/fig/350276" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.883.36193.figure24">
Figs 24
<normalizedToken id="E4F0837A5C714D5FDEF0C071C4D6B812" originalValue="A–J">A-J</normalizedToken>
</figureCitation>
,
<figureCitation id="246AF46D648FA8F9470D7247F784F5AA" captionStart="Figure 25" captionStartId="F25" captionText="Figure 25. Oligobregma brasierae sp. nov. A Live image, whole specimen, ventral view (holotype [specimen NHM _ 823]) B Live image, whole specimen, dorsal view (paratype NHM _ 684) C Live image, dorsal anterior, with prostomial features outlined in a fine white line (paratype NHM _ 684, h = prostomial horns, pe = peristomial ring)." figureDoi="10.3897/zookeys.883.36193.figure25" httpUri="https://binary.pensoft.net/fig/350277" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.883.36193.figure25">
25
<normalizedToken id="04ABB59EFADFAEAFFAF3FC3A5CDD12E3" originalValue="A–C">A-C</normalizedToken>
</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="34EF20998E749574FD05EA907E11296A" pageId="0" pageNumber="1" type="materials_examined">
<paragraph id="220EF948DCDDD0FF71E92C85DB5C50C2" pageId="0" pageNumber="1">Material examined.</paragraph>
<paragraph id="B283CDCBD22EAF2B16E6C3BFB622ECE8" pageId="0" pageNumber="1">
NHM_032 NHMUK ANEA 2019.7150, coll. 09 Oct. 2013,
<geoCoordinate id="34A665A63C6270B301BCA5216E8F4AEA" degrees="13" direction="north" minutes="50.232" orientation="latitude" precision="1" value="13.8372">13°50.232N</geoCoordinate>
,
<geoCoordinate id="2F1041D8CA4014630448417A51D0D256" degrees="116" direction="west" minutes="33.506" orientation="longitude" precision="1" value="-116.55843">116°33.506W</geoCoordinate>
, 4336 m http://data.nhm.ac.uk/object/43545746-b8ad-43a8-92b7-53637dd131d6; NHM_404 NHMUK ANEA 2019.7151, coll. 20 Oct. 2013,
<geoCoordinate id="73B67FEDE7D5C1136A585CC1EC19FC7F" degrees="13" direction="north" minutes="51.797" orientation="latitude" precision="1" value="13.863283">13°51.797N</geoCoordinate>
,
<geoCoordinate id="4F20B3EDE112DF113C3A93FC828AC623" degrees="116" direction="west" minutes="32.931" orientation="longitude" precision="1" value="-116.54885">116°32.931W</geoCoordinate>
, 4050 m http://data.nhm.ac.uk/object/5fda0cac-0a77-4ec7-a2fa-5cd529548a19; NHM_684 (
<emphasis id="D982C2A4CFF1E3902DEF2088BBEC146A" bold="true" pageId="0" pageNumber="1">paratype</emphasis>
) NHMUK ANEA 2019.7152, coll. 20 Feb. 2015,
<geoCoordinate id="C80D9990C4BE03A6DFEB68BC27E767FF" degrees="12" direction="north" minutes="32.23" orientation="latitude" precision="9" value="12.537167">12°32.23N</geoCoordinate>
,
<geoCoordinate id="A31476E4389553FA6D1DED895E8445AE" degrees="116" direction="west" minutes="36.25" orientation="longitude" precision="9" value="-116.604164">116°36.25W</geoCoordinate>
, 4425 m http://data.nhm.ac.uk/object/d84c37ed-138e-4064-a11d-a11a2470dfdf; NHM_823
<emphasis id="461F590293651F32717368AE6B6FADF7" bold="true" pageId="0" pageNumber="1">(holotype)</emphasis>
NHMUK ANEA 2019.7153, coll. 20 Feb. 2015,
<geoCoordinate id="5A09761DBABA750CC01AF2BB9877392F" degrees="12" direction="north" minutes="32.23" orientation="latitude" precision="9" value="12.537167">12°32.23N</geoCoordinate>
,
<geoCoordinate id="1227A5BF3BB37EF5BD2DD537D8C9C04D" degrees="116" direction="west" minutes="36.25" orientation="longitude" precision="9" value="-116.604164">116°36.25W</geoCoordinate>
, 4425 m http://data.nhm.ac.uk/object/74781dbb-1f65-4839-a766-24d6cde63ed0; NHM_1423 (
<emphasis id="2FC1C3701B86E0C92FE916D4FBF369EC" bold="true" pageId="0" pageNumber="1">paratype</emphasis>
) NHMUK ANEA 2019.7154, coll. 03 Mar. 2015,
<geoCoordinate id="334F34A9853859AB01731AA295A74550" degrees="12" direction="north" minutes="27.26" orientation="latitude" precision="9" value="12.454333">12°27.26N</geoCoordinate>
,
<geoCoordinate id="81E1EDCA5372A1F1315518F140CDB8B1" degrees="116" direction="west" minutes="36.77" orientation="longitude" precision="9" value="-116.61283">116°36.77W</geoCoordinate>
, 4137 m http://data.nhm.ac.uk/object/d949e987-6e03-4092-8492-c51dd7fcf4d7; NHM_1895 NHMUK ANEA 2019.7155, coll. 13 Mar. 2015,
<geoCoordinate id="8401ED7D5F86B5282FF601798896F5BA" degrees="12" direction="north" minutes="02.49" orientation="latitude" precision="9" value="12.0415">12°02.49N</geoCoordinate>
,
<geoCoordinate id="8A4708C2DB8ACB32CE58C9E67985F857" degrees="117" direction="west" minutes="13.03" orientation="longitude" precision="9" value="-117.21716">117°13.03W</geoCoordinate>
, 4094 m, http://data.nhm.ac.uk/object/02aaa9c0-837a-4836-8b34-5e68296c958e.
</paragraph>
</subSubSection>
<subSubSection id="1B27C2BDCF64D52B5235BD71B5C6C189" pageId="0" pageNumber="1" type="type locality">
<paragraph id="943B5672B59A619FE5B59E8E4B264C85" pageId="0" pageNumber="1">Type locality.</paragraph>
<paragraph id="F42F7D87F0015E1CB8C517BB184AE9C4" pageId="0" pageNumber="1">
Pacific Ocean, CCZ,
<geoCoordinate id="EB3064F5093015A3EC1A97AD2523BE6C" degrees="12" direction="north" minutes="32.23" orientation="latitude" precision="9" value="12.537167">12°32.23N</geoCoordinate>
,
<geoCoordinate id="DFCB4C9CA5D1B3D696ED84EC588ACB84" degrees="116" direction="west" minutes="36.25" orientation="longitude" precision="9" value="-116.604164">116°36.25W</geoCoordinate>
, depth 4425 m, in mud between polymetallic nodules.
</paragraph>
</subSubSection>
<subSubSection id="8FCFEC6647B73E412D7CAA0ECB9FDDE2" pageId="0" pageNumber="1" type="description">
<paragraph id="91EDBE610C28FF524C5FE3684C5ED183" pageId="0" pageNumber="1">Description.</paragraph>
<paragraph id="BF95CF439BBA6C14C552912D9DC2DFC5" pageId="0" pageNumber="1">
Small species, represented by six specimens. Holotype posteriorly incomplete, but otherwise in good condition, 9 mm long and 1 mm wide at the widest point for 24 chaetigers; paratypes complete, 6.0-6.5 mm long and 0.5-0.7 mm wide for 26 chaetigers. Body most expanded (inflated) through chaetigers 5-9, thereafter narrowing to posterior end. Colour in alcohol creamy white, without body pigment (
<figureCitation id="338DEB80066C91C234B00227090AC2C0" captionStart="Figure 24" captionStartId="F24" captionText="Figure 24. Oligobregma brasierae sp. nov. A Lab image, whole specimen (holotype [specimen NHM _ 823], pre-staining) B Lab image, dorsal anterior (holotype, faded stain, h = prostomial horns, pe = peristomial ring) C Lab image, dorsal segments, quadriannulate chaetigers (holotype, faded stain) D Lab image, ventral segments (holotype, faded stain, vm = ventral midline) E Lab image, ventral anterior, (holotype, pre-staining) F Lab image, mid-body parapodia (holotype, shirlastained, dc = dorsal cirrus, vc = ventral cirrus, ip = interramal papilla) G Lab image, detail of dorsal cirrus (paratype NHM _ 684, ig = internal gland) H Lab image, detail of hirstute notopodial spines on chaetiger 1 (paratype NHM _ 684, ig = internal gland) I Lab image, detail of capillary and lyrate chaetae (paratype NHM _ 684) J Lab images, posterior (paratype NHM _ 684, [bottom-left panel], ac = anal cirri, ig = internal gland). Morphological features in plates B-D, F, G, H have been outlined with a fine white or black line to improve clarity of those features. Scale bars: 1 mm (A, E); 50 μm (G); 25 μm (H, I); 100 μm (J)." figureDoi="10.3897/zookeys.883.36193.figure24" httpUri="https://binary.pensoft.net/fig/350276" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.883.36193.figure24">Fig. 24A</figureCitation>
); live specimens translucent (
<figureCitation id="D7386048BD4FE54F6D88822B11E2EB79" captionStart="Figure 25" captionStartId="F25" captionText="Figure 25. Oligobregma brasierae sp. nov. A Live image, whole specimen, ventral view (holotype [specimen NHM _ 823]) B Live image, whole specimen, dorsal view (paratype NHM _ 684) C Live image, dorsal anterior, with prostomial features outlined in a fine white line (paratype NHM _ 684, h = prostomial horns, pe = peristomial ring)." figureDoi="10.3897/zookeys.883.36193.figure25" httpUri="https://binary.pensoft.net/fig/350277" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.883.36193.figure25">Fig. 25</figureCitation>
)
</paragraph>
<caption id="6F49541F3C62CFC29DABAD05A71055D2" doi="10.3897/zookeys.883.36193.figure24" httpUri="https://binary.pensoft.net/fig/350276" pageId="0" pageNumber="1" start="Figure 24" startId="F24">
<paragraph id="CEEFEFA838C2A8011E46117F28DCF3F6" pageId="0" pageNumber="1">
<emphasis id="A362D06253EAC5036CFCB831E43C4EE0" bold="true" pageId="0" pageNumber="1">Figure 24.</emphasis>
<taxonomicName id="990163230926A43C5E4C523E487C2166" class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma brasierae" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="brasierae">
<emphasis id="D97A60E1850D3B60040595D7E5177A90" italics="true" pageId="0" pageNumber="1">Oligobregma brasierae</emphasis>
</taxonomicName>
sp. nov.
<emphasis id="DCD4DC817ADDBE0FEB4D43C98F7BC23A" bold="true" pageId="0" pageNumber="1">A</emphasis>
Lab image, whole specimen (holotype [specimen NHM_823], pre-staining)
<emphasis id="7F0E71E55CE2CD94BFFDE23FAEF2077D" bold="true" pageId="0" pageNumber="1">B</emphasis>
Lab image, dorsal anterior (holotype, faded stain, h = prostomial horns, pe = peristomial ring)
<emphasis id="4082C7650820D372DC5228FA396D987E" bold="true" pageId="0" pageNumber="1">C</emphasis>
Lab image, dorsal segments, quadriannulate chaetigers (holotype, faded stain)
<emphasis id="F19761F2497EEA1CA56C60FF683C7D31" bold="true" pageId="0" pageNumber="1">D</emphasis>
Lab image, ventral segments (holotype, faded stain, vm = ventral midline)
<emphasis id="A058D123265AFEDE2008BCE2C7E72181" bold="true" pageId="0" pageNumber="1">E</emphasis>
Lab image, ventral anterior, (holotype, pre-staining)
<emphasis id="77BDB9FA57E276326CB7C0317E0222C2" bold="true" pageId="0" pageNumber="1">F</emphasis>
Lab image, mid-body parapodia (holotype, shirlastained, dc = dorsal cirrus, vc = ventral cirrus, ip = interramal papilla)
<emphasis id="05C269C7F0906E24D8EB11AA77E4F319" bold="true" pageId="0" pageNumber="1">G</emphasis>
Lab image, detail of dorsal cirrus (paratype NHM_684, ig = internal gland)
<emphasis id="071C8925B09B0B99862E8E683ABF7AC6" bold="true" pageId="0" pageNumber="1">H</emphasis>
Lab image, detail of hirstute notopodial spines on chaetiger 1 (paratype NHM_684, ig = internal gland)
<emphasis id="2684C5478F864783AC39565AE2D52B7B" bold="true" pageId="0" pageNumber="1">I</emphasis>
Lab image, detail of capillary and lyrate chaetae (paratype NHM_684)
<emphasis id="14F60C24EA158160A5D974B31CBD8E44" bold="true" pageId="0" pageNumber="1">J</emphasis>
Lab images, posterior (paratype NHM_684, [bottom-left panel], ac = anal cirri, ig = internal gland). Morphological features in plates
<emphasis id="FF5C46429555B4914BBBB92B88F8309F" bold="true" pageId="0" pageNumber="1">
<normalizedToken id="5CF11D7C2D11591F710120567A941263" originalValue="B–D">B-D</normalizedToken>
, F, G, H
</emphasis>
have been outlined with a fine white or black line to improve clarity of those features. Scale bars: 1 mm (
<emphasis id="AD824F19D07F8E519BA0513B0752F9C1" bold="true" pageId="0" pageNumber="1">A, E</emphasis>
); 50
<normalizedToken id="881A6660944F77B77DA768703FC52763" originalValue="μm">μm</normalizedToken>
(
<emphasis id="85474B5DB0DCCA734D8BB2B0DCBF5D36" bold="true" pageId="0" pageNumber="1">G</emphasis>
); 25
<normalizedToken id="AE537FE3B7B19CBB16EBAAE1FA0DB1BD" originalValue="μm">μm</normalizedToken>
(
<emphasis id="447062A72C002D26C3E7733F83B8944F" bold="true" pageId="0" pageNumber="1">H, I</emphasis>
); 100
<normalizedToken id="E470B07734D10B3DE4C4E26B470440EA" originalValue="μm">μm</normalizedToken>
(
<emphasis id="8286504355F92858B6C6BAED3C500414" bold="true" pageId="0" pageNumber="1">J</emphasis>
).
</paragraph>
</caption>
<caption id="F44D934C37A96530DE37A94B8616732B" doi="10.3897/zookeys.883.36193.figure25" httpUri="https://binary.pensoft.net/fig/350277" pageId="0" pageNumber="1" start="Figure 25" startId="F25">
<paragraph id="F3A93526C244BB8B159D197F1E7239A1" pageId="0" pageNumber="1">
<emphasis id="1D3760FF10590CD312BC94032E498020" bold="true" pageId="0" pageNumber="1">Figure 25.</emphasis>
<taxonomicName id="A56D812279E4E9842045AA4691DB640B" class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma brasierae" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="brasierae">
<emphasis id="7E34B0CAB0E5A5B18BF540753567DF02" italics="true" pageId="0" pageNumber="1">Oligobregma brasierae</emphasis>
</taxonomicName>
sp. nov.
<emphasis id="DCE8E574433E2F3EA17FCE87CF096867" bold="true" pageId="0" pageNumber="1">A</emphasis>
Live image, whole specimen, ventral view (holotype [specimen NHM_823])
<emphasis id="5CB07AA427522F7DBBAAA90A4D3C2FFE" bold="true" pageId="0" pageNumber="1">B</emphasis>
Live image, whole specimen, dorsal view (paratype NHM_684)
<emphasis id="DB3D83A91E21B449E5CF0838778A626B" bold="true" pageId="0" pageNumber="1">C</emphasis>
Live image, dorsal anterior, with prostomial features outlined in a fine white line(paratype NHM_684, h = prostomial horns, pe = peristomial ring).
</paragraph>
</caption>
<paragraph id="21CEEEED4ACB960566AB1ED8F399EBD5" pageId="0" pageNumber="1">
Anterior body segments smooth, no obvious annulation of raised pads detected (even after staining) (
<figureCitation id="864F6A14640A2639CE5AB4048AB8369C" captionStart="Figure 24" captionStartId="F24" captionText="Figure 24. Oligobregma brasierae sp. nov. A Lab image, whole specimen (holotype [specimen NHM _ 823], pre-staining) B Lab image, dorsal anterior (holotype, faded stain, h = prostomial horns, pe = peristomial ring) C Lab image, dorsal segments, quadriannulate chaetigers (holotype, faded stain) D Lab image, ventral segments (holotype, faded stain, vm = ventral midline) E Lab image, ventral anterior, (holotype, pre-staining) F Lab image, mid-body parapodia (holotype, shirlastained, dc = dorsal cirrus, vc = ventral cirrus, ip = interramal papilla) G Lab image, detail of dorsal cirrus (paratype NHM _ 684, ig = internal gland) H Lab image, detail of hirstute notopodial spines on chaetiger 1 (paratype NHM _ 684, ig = internal gland) I Lab image, detail of capillary and lyrate chaetae (paratype NHM _ 684) J Lab images, posterior (paratype NHM _ 684, [bottom-left panel], ac = anal cirri, ig = internal gland). Morphological features in plates B-D, F, G, H have been outlined with a fine white or black line to improve clarity of those features. Scale bars: 1 mm (A, E); 50 μm (G); 25 μm (H, I); 100 μm (J)." figureDoi="10.3897/zookeys.883.36193.figure24" httpUri="https://binary.pensoft.net/fig/350276" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.883.36193.figure24">Fig. 24B</figureCitation>
); annulation becomes most distinct in narrow, posterior part of the body, where segments quadriannulate (
<figureCitation id="9740A9EDE7E803E59E009CD2B54E68BA" captionStart="Figure 24" captionStartId="F24" captionText="Figure 24. Oligobregma brasierae sp. nov. A Lab image, whole specimen (holotype [specimen NHM _ 823], pre-staining) B Lab image, dorsal anterior (holotype, faded stain, h = prostomial horns, pe = peristomial ring) C Lab image, dorsal segments, quadriannulate chaetigers (holotype, faded stain) D Lab image, ventral segments (holotype, faded stain, vm = ventral midline) E Lab image, ventral anterior, (holotype, pre-staining) F Lab image, mid-body parapodia (holotype, shirlastained, dc = dorsal cirrus, vc = ventral cirrus, ip = interramal papilla) G Lab image, detail of dorsal cirrus (paratype NHM _ 684, ig = internal gland) H Lab image, detail of hirstute notopodial spines on chaetiger 1 (paratype NHM _ 684, ig = internal gland) I Lab image, detail of capillary and lyrate chaetae (paratype NHM _ 684) J Lab images, posterior (paratype NHM _ 684, [bottom-left panel], ac = anal cirri, ig = internal gland). Morphological features in plates B-D, F, G, H have been outlined with a fine white or black line to improve clarity of those features. Scale bars: 1 mm (A, E); 50 μm (G); 25 μm (H, I); 100 μm (J)." figureDoi="10.3897/zookeys.883.36193.figure24" httpUri="https://binary.pensoft.net/fig/350276" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.883.36193.figure24">Fig. 24C</figureCitation>
). Venter with prominent ventral midline from chaetiger 2 composed of a row of large pads within a groove (
<figureCitation id="33410E5938B747FCB4C5D836E1ADC380" captionStart="Figure 24" captionStartId="F24" captionText="Figure 24. Oligobregma brasierae sp. nov. A Lab image, whole specimen (holotype [specimen NHM _ 823], pre-staining) B Lab image, dorsal anterior (holotype, faded stain, h = prostomial horns, pe = peristomial ring) C Lab image, dorsal segments, quadriannulate chaetigers (holotype, faded stain) D Lab image, ventral segments (holotype, faded stain, vm = ventral midline) E Lab image, ventral anterior, (holotype, pre-staining) F Lab image, mid-body parapodia (holotype, shirlastained, dc = dorsal cirrus, vc = ventral cirrus, ip = interramal papilla) G Lab image, detail of dorsal cirrus (paratype NHM _ 684, ig = internal gland) H Lab image, detail of hirstute notopodial spines on chaetiger 1 (paratype NHM _ 684, ig = internal gland) I Lab image, detail of capillary and lyrate chaetae (paratype NHM _ 684) J Lab images, posterior (paratype NHM _ 684, [bottom-left panel], ac = anal cirri, ig = internal gland). Morphological features in plates B-D, F, G, H have been outlined with a fine white or black line to improve clarity of those features. Scale bars: 1 mm (A, E); 50 μm (G); 25 μm (H, I); 100 μm (J)." figureDoi="10.3897/zookeys.883.36193.figure24" httpUri="https://binary.pensoft.net/fig/350276" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.883.36193.figure24">Fig. 24D</figureCitation>
). Branchiae absent.
</paragraph>
<paragraph id="3A440F87ADB68DC0978BD7D313C8F41C" pageId="0" pageNumber="1">
Prostomium broadly rounded anteriorly, weakly expanded laterally, narrowing posteriorly; with two short, rounded lobes (horns) emerging anterolaterally from anterior prostomial margin (
<figureCitation id="C2B7A6CEBDDBF00366D5F8AE6BD7582C" captionStart="Figure 24" captionStartId="F24" captionText="Figure 24. Oligobregma brasierae sp. nov. A Lab image, whole specimen (holotype [specimen NHM _ 823], pre-staining) B Lab image, dorsal anterior (holotype, faded stain, h = prostomial horns, pe = peristomial ring) C Lab image, dorsal segments, quadriannulate chaetigers (holotype, faded stain) D Lab image, ventral segments (holotype, faded stain, vm = ventral midline) E Lab image, ventral anterior, (holotype, pre-staining) F Lab image, mid-body parapodia (holotype, shirlastained, dc = dorsal cirrus, vc = ventral cirrus, ip = interramal papilla) G Lab image, detail of dorsal cirrus (paratype NHM _ 684, ig = internal gland) H Lab image, detail of hirstute notopodial spines on chaetiger 1 (paratype NHM _ 684, ig = internal gland) I Lab image, detail of capillary and lyrate chaetae (paratype NHM _ 684) J Lab images, posterior (paratype NHM _ 684, [bottom-left panel], ac = anal cirri, ig = internal gland). Morphological features in plates B-D, F, G, H have been outlined with a fine white or black line to improve clarity of those features. Scale bars: 1 mm (A, E); 50 μm (G); 25 μm (H, I); 100 μm (J)." figureDoi="10.3897/zookeys.883.36193.figure24" httpUri="https://binary.pensoft.net/fig/350276" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.883.36193.figure24">Figs 24B</figureCitation>
,
<figureCitation id="4A950BE828DFF50121A83DDEE3D7256C" captionStart="Figure 25" captionStartId="F25" captionText="Figure 25. Oligobregma brasierae sp. nov. A Live image, whole specimen, ventral view (holotype [specimen NHM _ 823]) B Live image, whole specimen, dorsal view (paratype NHM _ 684) C Live image, dorsal anterior, with prostomial features outlined in a fine white line (paratype NHM _ 684, h = prostomial horns, pe = peristomial ring)." figureDoi="10.3897/zookeys.883.36193.figure25" httpUri="https://binary.pensoft.net/fig/350277" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.883.36193.figure25">25C</figureCitation>
). Eyes absent. Proboscis observed as a soft, smooth sac-like structure (
<figureCitation id="7FD173477EBC19B74437025BCE0E14FC" captionStart="Figure 24" captionStartId="F24" captionText="Figure 24. Oligobregma brasierae sp. nov. A Lab image, whole specimen (holotype [specimen NHM _ 823], pre-staining) B Lab image, dorsal anterior (holotype, faded stain, h = prostomial horns, pe = peristomial ring) C Lab image, dorsal segments, quadriannulate chaetigers (holotype, faded stain) D Lab image, ventral segments (holotype, faded stain, vm = ventral midline) E Lab image, ventral anterior, (holotype, pre-staining) F Lab image, mid-body parapodia (holotype, shirlastained, dc = dorsal cirrus, vc = ventral cirrus, ip = interramal papilla) G Lab image, detail of dorsal cirrus (paratype NHM _ 684, ig = internal gland) H Lab image, detail of hirstute notopodial spines on chaetiger 1 (paratype NHM _ 684, ig = internal gland) I Lab image, detail of capillary and lyrate chaetae (paratype NHM _ 684) J Lab images, posterior (paratype NHM _ 684, [bottom-left panel], ac = anal cirri, ig = internal gland). Morphological features in plates B-D, F, G, H have been outlined with a fine white or black line to improve clarity of those features. Scale bars: 1 mm (A, E); 50 μm (G); 25 μm (H, I); 100 μm (J)." figureDoi="10.3897/zookeys.883.36193.figure24" httpUri="https://binary.pensoft.net/fig/350276" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.883.36193.figure24">Fig. 24E</figureCitation>
). Peristomium forming a smooth large ring around prostomium dorso-laterally, interrupted middorsally (
<figureCitation id="245380F87B87FB2AF327612E14B256A8" captionStart="Figure 24" captionStartId="F24" captionText="Figure 24. Oligobregma brasierae sp. nov. A Lab image, whole specimen (holotype [specimen NHM _ 823], pre-staining) B Lab image, dorsal anterior (holotype, faded stain, h = prostomial horns, pe = peristomial ring) C Lab image, dorsal segments, quadriannulate chaetigers (holotype, faded stain) D Lab image, ventral segments (holotype, faded stain, vm = ventral midline) E Lab image, ventral anterior, (holotype, pre-staining) F Lab image, mid-body parapodia (holotype, shirlastained, dc = dorsal cirrus, vc = ventral cirrus, ip = interramal papilla) G Lab image, detail of dorsal cirrus (paratype NHM _ 684, ig = internal gland) H Lab image, detail of hirstute notopodial spines on chaetiger 1 (paratype NHM _ 684, ig = internal gland) I Lab image, detail of capillary and lyrate chaetae (paratype NHM _ 684) J Lab images, posterior (paratype NHM _ 684, [bottom-left panel], ac = anal cirri, ig = internal gland). Morphological features in plates B-D, F, G, H have been outlined with a fine white or black line to improve clarity of those features. Scale bars: 1 mm (A, E); 50 μm (G); 25 μm (H, I); 100 μm (J)." figureDoi="10.3897/zookeys.883.36193.figure24" httpUri="https://binary.pensoft.net/fig/350276" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.883.36193.figure24">Figs 24B</figureCitation>
,
<figureCitation id="22FA6061000F03BDDBC343B9DDD82106" captionStart="Figure 25" captionStartId="F25" captionText="Figure 25. Oligobregma brasierae sp. nov. A Live image, whole specimen, ventral view (holotype [specimen NHM _ 823]) B Live image, whole specimen, dorsal view (paratype NHM _ 684) C Live image, dorsal anterior, with prostomial features outlined in a fine white line (paratype NHM _ 684, h = prostomial horns, pe = peristomial ring)." figureDoi="10.3897/zookeys.883.36193.figure25" httpUri="https://binary.pensoft.net/fig/350277" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.883.36193.figure25">25C</figureCitation>
), ventrally obscured by extended proboscis in holotype.
</paragraph>
<paragraph id="8A7360EF98ABEACB3B14736E3CCC4A68" pageId="0" pageNumber="1">
Parapodia biramous; inconspicuous in chaetigers 1-7, becoming longer posteriorly and prominent from around chaetiger 14. Tiny dorsal cirri detectable from chaetigers 14 in holotype, whereas ventral cirri occur from chaetiger 15 where well developed; both cirri large on subsequent segments; conical with broad base (
<figureCitation id="E79FE52EF33B5FA6A9F5FB7140B106DD" captionStart="Figure 24" captionStartId="F24" captionText="Figure 24. Oligobregma brasierae sp. nov. A Lab image, whole specimen (holotype [specimen NHM _ 823], pre-staining) B Lab image, dorsal anterior (holotype, faded stain, h = prostomial horns, pe = peristomial ring) C Lab image, dorsal segments, quadriannulate chaetigers (holotype, faded stain) D Lab image, ventral segments (holotype, faded stain, vm = ventral midline) E Lab image, ventral anterior, (holotype, pre-staining) F Lab image, mid-body parapodia (holotype, shirlastained, dc = dorsal cirrus, vc = ventral cirrus, ip = interramal papilla) G Lab image, detail of dorsal cirrus (paratype NHM _ 684, ig = internal gland) H Lab image, detail of hirstute notopodial spines on chaetiger 1 (paratype NHM _ 684, ig = internal gland) I Lab image, detail of capillary and lyrate chaetae (paratype NHM _ 684) J Lab images, posterior (paratype NHM _ 684, [bottom-left panel], ac = anal cirri, ig = internal gland). Morphological features in plates B-D, F, G, H have been outlined with a fine white or black line to improve clarity of those features. Scale bars: 1 mm (A, E); 50 μm (G); 25 μm (H, I); 100 μm (J)." figureDoi="10.3897/zookeys.883.36193.figure24" httpUri="https://binary.pensoft.net/fig/350276" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.883.36193.figure24">Fig. 24F</figureCitation>
); without pigmentation; both dorsal and ventral cirri with detectable gold-pigmented internal glands (
<figureCitation id="41E3674F941362510D4A41B7658990BD" captionStart="Figure 24" captionStartId="F24" captionText="Figure 24. Oligobregma brasierae sp. nov. A Lab image, whole specimen (holotype [specimen NHM _ 823], pre-staining) B Lab image, dorsal anterior (holotype, faded stain, h = prostomial horns, pe = peristomial ring) C Lab image, dorsal segments, quadriannulate chaetigers (holotype, faded stain) D Lab image, ventral segments (holotype, faded stain, vm = ventral midline) E Lab image, ventral anterior, (holotype, pre-staining) F Lab image, mid-body parapodia (holotype, shirlastained, dc = dorsal cirrus, vc = ventral cirrus, ip = interramal papilla) G Lab image, detail of dorsal cirrus (paratype NHM _ 684, ig = internal gland) H Lab image, detail of hirstute notopodial spines on chaetiger 1 (paratype NHM _ 684, ig = internal gland) I Lab image, detail of capillary and lyrate chaetae (paratype NHM _ 684) J Lab images, posterior (paratype NHM _ 684, [bottom-left panel], ac = anal cirri, ig = internal gland). Morphological features in plates B-D, F, G, H have been outlined with a fine white or black line to improve clarity of those features. Scale bars: 1 mm (A, E); 50 μm (G); 25 μm (H, I); 100 μm (J)." figureDoi="10.3897/zookeys.883.36193.figure24" httpUri="https://binary.pensoft.net/fig/350276" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.883.36193.figure24">Fig. 24G</figureCitation>
). Interramal papilla present, inconspicuous in anterior parapodia (only observed upon staining), well developed in posterior parapodia
<figureCitation id="298AEAF9D3435F9E77ED5D378FDE3463" captionStart="Figure 24" captionStartId="F24" captionText="Figure 24. Oligobregma brasierae sp. nov. A Lab image, whole specimen (holotype [specimen NHM _ 823], pre-staining) B Lab image, dorsal anterior (holotype, faded stain, h = prostomial horns, pe = peristomial ring) C Lab image, dorsal segments, quadriannulate chaetigers (holotype, faded stain) D Lab image, ventral segments (holotype, faded stain, vm = ventral midline) E Lab image, ventral anterior, (holotype, pre-staining) F Lab image, mid-body parapodia (holotype, shirlastained, dc = dorsal cirrus, vc = ventral cirrus, ip = interramal papilla) G Lab image, detail of dorsal cirrus (paratype NHM _ 684, ig = internal gland) H Lab image, detail of hirstute notopodial spines on chaetiger 1 (paratype NHM _ 684, ig = internal gland) I Lab image, detail of capillary and lyrate chaetae (paratype NHM _ 684) J Lab images, posterior (paratype NHM _ 684, [bottom-left panel], ac = anal cirri, ig = internal gland). Morphological features in plates B-D, F, G, H have been outlined with a fine white or black line to improve clarity of those features. Scale bars: 1 mm (A, E); 50 μm (G); 25 μm (H, I); 100 μm (J)." figureDoi="10.3897/zookeys.883.36193.figure24" httpUri="https://binary.pensoft.net/fig/350276" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.883.36193.figure24">Fig. 24F</figureCitation>
).
</paragraph>
<paragraph id="9F5B57898AD4E43C7D3A63C3CDA45554" pageId="0" pageNumber="1">
Curved acicular spines present in notopodia and neuropodia on chaetigers 1-4 (
<figureCitation id="BFD7EB52E9035675F0F1DD80C1AC8269" captionStart="Figure 24" captionStartId="F24" captionText="Figure 24. Oligobregma brasierae sp. nov. A Lab image, whole specimen (holotype [specimen NHM _ 823], pre-staining) B Lab image, dorsal anterior (holotype, faded stain, h = prostomial horns, pe = peristomial ring) C Lab image, dorsal segments, quadriannulate chaetigers (holotype, faded stain) D Lab image, ventral segments (holotype, faded stain, vm = ventral midline) E Lab image, ventral anterior, (holotype, pre-staining) F Lab image, mid-body parapodia (holotype, shirlastained, dc = dorsal cirrus, vc = ventral cirrus, ip = interramal papilla) G Lab image, detail of dorsal cirrus (paratype NHM _ 684, ig = internal gland) H Lab image, detail of hirstute notopodial spines on chaetiger 1 (paratype NHM _ 684, ig = internal gland) I Lab image, detail of capillary and lyrate chaetae (paratype NHM _ 684) J Lab images, posterior (paratype NHM _ 684, [bottom-left panel], ac = anal cirri, ig = internal gland). Morphological features in plates B-D, F, G, H have been outlined with a fine white or black line to improve clarity of those features. Scale bars: 1 mm (A, E); 50 μm (G); 25 μm (H, I); 100 μm (J)." figureDoi="10.3897/zookeys.883.36193.figure24" httpUri="https://binary.pensoft.net/fig/350276" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.883.36193.figure24">Fig. 24H</figureCitation>
). Notopodia with about 20 spines arranged in two rows in chaetigers 1 and 2, and with about 10 spines arranged in one row in chaetigers 3 and 4, spines accompanied posteriorly by single row of capillaries; neuropodial spines fewer in numbers arranged irregularly. Spines slightly curved, narrowing to slender elongated tip (
<figureCitation id="A1B9986B2DF332285560869591020873" captionStart="Figure 24" captionStartId="F24" captionText="Figure 24. Oligobregma brasierae sp. nov. A Lab image, whole specimen (holotype [specimen NHM _ 823], pre-staining) B Lab image, dorsal anterior (holotype, faded stain, h = prostomial horns, pe = peristomial ring) C Lab image, dorsal segments, quadriannulate chaetigers (holotype, faded stain) D Lab image, ventral segments (holotype, faded stain, vm = ventral midline) E Lab image, ventral anterior, (holotype, pre-staining) F Lab image, mid-body parapodia (holotype, shirlastained, dc = dorsal cirrus, vc = ventral cirrus, ip = interramal papilla) G Lab image, detail of dorsal cirrus (paratype NHM _ 684, ig = internal gland) H Lab image, detail of hirstute notopodial spines on chaetiger 1 (paratype NHM _ 684, ig = internal gland) I Lab image, detail of capillary and lyrate chaetae (paratype NHM _ 684) J Lab images, posterior (paratype NHM _ 684, [bottom-left panel], ac = anal cirri, ig = internal gland). Morphological features in plates B-D, F, G, H have been outlined with a fine white or black line to improve clarity of those features. Scale bars: 1 mm (A, E); 50 μm (G); 25 μm (H, I); 100 μm (J)." figureDoi="10.3897/zookeys.883.36193.figure24" httpUri="https://binary.pensoft.net/fig/350276" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.883.36193.figure24">Fig. 24H</figureCitation>
). Short spinous chaetae anterior to spines not observed. Subsequent chaetigers with long thin capillaries in both rami. Lyrate chaetae from chaetiger 5, in both rami, positioned anteriorly to capillaries. Lyrate chaetae short, with unequal tynes bearing short bristles (
<figureCitation id="51D067DAD6D2B62B7A562074365677C3" captionStart="Figure 24" captionStartId="F24" captionText="Figure 24. Oligobregma brasierae sp. nov. A Lab image, whole specimen (holotype [specimen NHM _ 823], pre-staining) B Lab image, dorsal anterior (holotype, faded stain, h = prostomial horns, pe = peristomial ring) C Lab image, dorsal segments, quadriannulate chaetigers (holotype, faded stain) D Lab image, ventral segments (holotype, faded stain, vm = ventral midline) E Lab image, ventral anterior, (holotype, pre-staining) F Lab image, mid-body parapodia (holotype, shirlastained, dc = dorsal cirrus, vc = ventral cirrus, ip = interramal papilla) G Lab image, detail of dorsal cirrus (paratype NHM _ 684, ig = internal gland) H Lab image, detail of hirstute notopodial spines on chaetiger 1 (paratype NHM _ 684, ig = internal gland) I Lab image, detail of capillary and lyrate chaetae (paratype NHM _ 684) J Lab images, posterior (paratype NHM _ 684, [bottom-left panel], ac = anal cirri, ig = internal gland). Morphological features in plates B-D, F, G, H have been outlined with a fine white or black line to improve clarity of those features. Scale bars: 1 mm (A, E); 50 μm (G); 25 μm (H, I); 100 μm (J)." figureDoi="10.3897/zookeys.883.36193.figure24" httpUri="https://binary.pensoft.net/fig/350276" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.883.36193.figure24">Fig. 24I</figureCitation>
), numbering two or three per noto- and neuropodium in anterior segments and up to six in posterior segments.
</paragraph>
<paragraph id="2FE4D1F0EAB13DBE25D9322C05C572E0" pageId="0" pageNumber="1">
Single achaetigerous ring subsequent to the last chaetiger. Pygidium missing in holotype, but observed in paratypes; broad, triannulated, distally broadly rounded lobe; with few terminal, short anal cirri still attached in paratype NHM_684 (
<figureCitation id="70A529664B8B048B4C8D68F7176FCEC6" captionStart="Figure 24" captionStartId="F24" captionText="Figure 24. Oligobregma brasierae sp. nov. A Lab image, whole specimen (holotype [specimen NHM _ 823], pre-staining) B Lab image, dorsal anterior (holotype, faded stain, h = prostomial horns, pe = peristomial ring) C Lab image, dorsal segments, quadriannulate chaetigers (holotype, faded stain) D Lab image, ventral segments (holotype, faded stain, vm = ventral midline) E Lab image, ventral anterior, (holotype, pre-staining) F Lab image, mid-body parapodia (holotype, shirlastained, dc = dorsal cirrus, vc = ventral cirrus, ip = interramal papilla) G Lab image, detail of dorsal cirrus (paratype NHM _ 684, ig = internal gland) H Lab image, detail of hirstute notopodial spines on chaetiger 1 (paratype NHM _ 684, ig = internal gland) I Lab image, detail of capillary and lyrate chaetae (paratype NHM _ 684) J Lab images, posterior (paratype NHM _ 684, [bottom-left panel], ac = anal cirri, ig = internal gland). Morphological features in plates B-D, F, G, H have been outlined with a fine white or black line to improve clarity of those features. Scale bars: 1 mm (A, E); 50 μm (G); 25 μm (H, I); 100 μm (J)." figureDoi="10.3897/zookeys.883.36193.figure24" httpUri="https://binary.pensoft.net/fig/350276" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.883.36193.figure24">Fig. 24J</figureCitation>
).
</paragraph>
<paragraph id="E3A53735040034C20C3DF81DD8219304" pageId="0" pageNumber="1">Morphological variation: Some variability was noticed between different sized specimens. In the slightly bigger holotype (NHM_823) the spines can be observed on chaetigers 1-4 in both rami, and the dorsal cirri can be detected from chaetiger 14. In the smaller paratype (NHM_684), the spines cannot be unambiguously confirmed in ch. 4, particularly in neuropodia and dorsal cirrus can be detected from chaetiger 13.</paragraph>
</subSubSection>
<subSubSection id="C87A290DBD99B442D39592D81C34EC11" pageId="0" pageNumber="1" type="genetic data">
<paragraph id="E7E420ABDF2D122F359A0DB20BE9453E" pageId="0" pageNumber="1">Genetic data.</paragraph>
<paragraph id="24738111CEBC0A78A071EB8A01A6DF87" pageId="0" pageNumber="1">
GenBank MN217422-MN217427 for 16S, MN217498 for 18S and MN217517 for COI. This species is genetically identical or very similar to sequences published in
<bibRefCitation id="D1464F1F4D8FFE10204B3CFEADC618BC" DOI="https://doi.org/10.1371/journal.pone.0117790" author="Janssen, A" journalOrPublisher="Proceedings of the Linnean Society of New South Wales" pageId="0" pageNumber="1" refId="B49" refString="Janssen, A, Kaiser, S, Meissner, K, Brenke, N, Menot, L, Martinez Arbizu, P, 2015. .https://doi.org/10.1371/journal.pone.0117790" url="https://doi.org/10.1371/journal.pone.0117790" year="2015">Janssen et al. (2015)</bibRefCitation>
, with K2P values ranging from 0.0-0.003 between
<taxonomicName id="247F3ECEBEE285EE92C2AF7899D38E5A" lsidName="O. brasierae" pageId="0" pageNumber="1" rank="species" species="brasierae">
<emphasis id="79FC17361FF0D77E1886F4F74E32A983" italics="true" pageId="0" pageNumber="1">O. brasierae</emphasis>
</taxonomicName>
and the already published sequences with accession numbers KJ736359-KJ736363. The three
<taxonomicName id="6D2F5741193502F1C8D4B2193D10DB0B" class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma" pageId="0" pageNumber="1" phylum="Annelida" rank="genus">
<emphasis id="1ADD0EB5B54277251E54FBDB51839D4B" italics="true" pageId="0" pageNumber="1">Oligobregma</emphasis>
</taxonomicName>
species in this study form a well-supported clade in our phylogenetic analyses, with
<taxonomicName id="1F07E6DA1196F875499C2D4F6833BD11" class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma brasierae" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="brasierae">
<emphasis id="C3912027983A4707DF233B79DF1804A4" italics="true" pageId="0" pageNumber="1">Oligobregma brasierae</emphasis>
</taxonomicName>
sp. nov. as sister to
<taxonomicName id="72D4D0A20930C4464A702CAEC1623066" class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma tani" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="tani">
<emphasis id="32B02F0758AA356EF936EE60118BAC04" italics="true" pageId="0" pageNumber="1">Oligobregma tani</emphasis>
</taxonomicName>
sp. nov. (
<figureCitation id="B821F0E2968FF8323266891B1BDE4EB3" captionStart="Figure 32" captionStartId="F32" captionText="Figure 32. Phylogenetic analysis of Scalibregmatidae and Travisiidae. 50 % majority rule tree from the Bayesian analyses using 18 S and 16 S, with posterior probability values on nodes. Twenty taxa from GenBank were included, and Opheliidae was chosen as outgroup following the annelid phylogeny of Weigert and Bleidorn (2016)." figureDoi="10.3897/zookeys.883.36193.figure32" httpUri="https://binary.pensoft.net/fig/350284" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.883.36193.figure32">Fig. 32</figureCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="CBD838B8B76C0DDF6FBC7B02D3BE72B6" pageId="0" pageNumber="1" type="remarks">
<paragraph id="AF58E31C00AC326D876C2684F20A61B7" pageId="0" pageNumber="1">Remarks.</paragraph>
<paragraph id="C2CB0AF5534959FBA2345F2E8569E7C8" pageId="0" pageNumber="1">
Currently, there are nine valid species assigned to the genus
<taxonomicName id="26AAD277FA996ACAF7B6F0297CFC563A" class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma" pageId="0" pageNumber="1" phylum="Annelida" rank="genus">
<emphasis id="234887C8D048121BCE4DB8C3941BBD99" italics="true" pageId="0" pageNumber="1">Oligobregma</emphasis>
</taxonomicName>
(
<bibRefCitation id="A745FFDCC741D5283D3E075925E556EA" author="Read, G" journalOrPublisher="Nova Acta Academiae Caesareae Leopoldino-Carolinae Naturae Curiosorum" pageId="0" pageNumber="1" publicationUrl="http://www.marinespecies.org/aphia.php?p=taxdetails&amp;id=324770" refId="B81" refString="Read, G, Fauchald, K, 2018b. .http://www.marinespecies.org/aphia.php?p=taxdetails&amp;id=324770" url="http://www.marinespecies.org/aphia.php?p=taxdetails&amp;id=324770" year="2018 b">Read and Fauchald 2018b</bibRefCitation>
), with
<taxonomicName id="F1AE4BEDE4D5BBA1DD426CF5665567EC" lsidName="O. blakei" pageId="0" pageNumber="1" rank="species" species="blakei">
<emphasis id="17AFF1B56D1444A495D4901388781ABC" italics="true" pageId="0" pageNumber="1">O. blakei</emphasis>
</taxonomicName>
<normalizedToken id="23B9905B3A6FC47016D795431E116B1F" originalValue="Schüller">Schueller</normalizedToken>
&amp; Hilbig, 2007 considered a nomen dubium. All three
<taxonomicName id="64E02ADCA1E0E5E7A260464D2DFB3474" class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma" pageId="0" pageNumber="1" phylum="Annelida" rank="genus">
<emphasis id="CA74DC35F1938F8581E3FF074A252ADC" italics="true" pageId="0" pageNumber="1">Oligobregma</emphasis>
</taxonomicName>
species from the ABYSSLINE material can be easily distinguished from those that have acicular spines in two (
<taxonomicName id="89640DB43D6E284579C39961973CDEB0" lsidName="O. pseudocollare" pageId="0" pageNumber="1" rank="species" species="pseudocollare">
<emphasis id="BFBACC1C2369A1D20BCA1C1E480DB8B2" italics="true" pageId="0" pageNumber="1">O. pseudocollare</emphasis>
</taxonomicName>
<normalizedToken id="7F8014288B28FE175910D7E58A2A0208" originalValue="Schüller">Schueller</normalizedToken>
&amp; Hilbig, 2007,
<taxonomicName id="B6CCD2C022BA066A8BDDE09ED2726DB2" lsidName="O. oculata" pageId="0" pageNumber="1" rank="species" species="oculata">
<emphasis id="62E13427261422B3E76F3843BFE95FB0" italics="true" pageId="0" pageNumber="1">O. oculata</emphasis>
</taxonomicName>
Kudenov &amp; Blake, 1978) or three (
<taxonomicName id="01039FC79191D006D3DEFFD60E4C39CC" lsidName="O. mucronata" pageId="0" pageNumber="1" rank="species" species="mucronata">
<emphasis id="77CDA99956D357056D804103E0AF8810" italics="true" pageId="0" pageNumber="1">O. mucronata</emphasis>
</taxonomicName>
Blake, 2015,
<taxonomicName id="26F7BBDC98AE774EBDE4209E3D5F740F" lsidName="O. aciculata" pageId="0" pageNumber="1" rank="species" species="aciculata">
<emphasis id="1C140C8C4573D932DE8D073153D5FFC9" italics="true" pageId="0" pageNumber="1">O. aciculata</emphasis>
</taxonomicName>
(Hartman, 1965),
<taxonomicName id="C9B37476BB06092826A8D8EE07870261" lsidName="O. collare" pageId="0" pageNumber="1" rank="species" species="collare">
<emphasis id="16CF5AB5B59F0F17D3FDEB3120509326" italics="true" pageId="0" pageNumber="1">O. collare</emphasis>
</taxonomicName>
(Levenstein, 1975),
<taxonomicName id="CAEC5A371A602CC0D8A631FEC4212632" lsidName="O. notiale" pageId="0" pageNumber="1" rank="species" species="notiale">
<emphasis id="57E65DEBB835D15A29FBB198BF939736" italics="true" pageId="0" pageNumber="1">O. notiale</emphasis>
</taxonomicName>
Blake, 1981) anterior chaetigers only.
</paragraph>
<paragraph id="E457C3A679A523BC265A50CE3782953E" pageId="0" pageNumber="1">
More specifically,
<taxonomicName id="87B407F25DC7DCF06D4C816EB98FAB9E" class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma simplex" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="simplex">
<emphasis id="B88A06A7F6F5D416E647C82B1944642C" italics="true" pageId="0" pageNumber="1">Oligobregma simplex</emphasis>
</taxonomicName>
Kudenov &amp; Blake, 1978,
<taxonomicName id="FD23BB1B21C284CF70190C587827E9D1" lsidName="O. lonchochaeta" pageId="0" pageNumber="1" rank="species" species="lonchochaeta">
<emphasis id="C531EAFE04049D95611083D7BFFF2CE6" italics="true" pageId="0" pageNumber="1">O. lonchochaeta</emphasis>
</taxonomicName>
Detinova, 1985 and
<taxonomicName id="9A6CAB91A52D5740CD7A9BE1DBC0C5F7" lsidName="O. quadrispinosa" pageId="0" pageNumber="1" rank="species" species="quadrispinosa">
<emphasis id="CDCDA7DF116C66A1EDC56B4FED8DC697" italics="true" pageId="0" pageNumber="1">O. quadrispinosa</emphasis>
</taxonomicName>
<normalizedToken id="1DCBCA3A2097EB9215CB38CFEE28CC04" originalValue="Schüller">Schueller</normalizedToken>
&amp; Hilbig, 2007 share the presence of spines in chaetigers 1-4 with
<taxonomicName id="7FDC038F822272D2B73F8E23C99A75A5" lsidName="O. brasieri" pageId="0" pageNumber="1" rank="species" species="brasieri">
<emphasis id="EC1A6E1D8A4C8F2BB5960DA6E197F7C3" italics="true" pageId="0" pageNumber="1">O. brasieri</emphasis>
</taxonomicName>
sp. nov., as well as having relatively large posterior dorsal and ventral cirri.
<taxonomicName id="F704D61D76BFD903D2E201C3AE2F2688" class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma simplex" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="simplex">
<emphasis id="1631E88048966E42344D069E1964F2F6" italics="true" pageId="0" pageNumber="1">Oligobregma simplex</emphasis>
</taxonomicName>
is a shallow water species (Western Port, Victoria, Australia, 11 m) and, while similar in size (5 mm long), it has a greater number of chaetigers (43 versus 26 in UKSR species) and more posterior appearance of dorsal and ventral cirri (on ch. 20-22 versus ch. 13-15).
<taxonomicName id="E686E80CC703F40ADFEEED16E2ABCF54" class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma lonchochaeta" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="lonchochaeta">
<emphasis id="4B0D2E7F3DAE77A8636F1B88A81C036D" italics="true" pageId="0" pageNumber="1">Oligobregma lonchochaeta</emphasis>
</taxonomicName>
has been described from a single, incomplete specimen from the abyssal North Atlantic, but its description is brief, not including the observation on the appearance of dorsal and ventral cirri, and there are no DNA data.
<bibRefCitation id="CC1B400C7002925EC26F712133FE7ACD" author="Detinova, NN" journalOrPublisher="Shirshova" pageId="0" pageNumber="1" pagination="96 - 136" refId="B20" refString="Detinova, NN, 1985. Mnogoshchetinkovye chervi khrebta Reikyanes (Severnaya Atlantika) [Polychaetous worms from the Reykjanes Ridge (the North Atlantic). Bottom Fauna from Mid-Ocean Rises in the North Atlantic. Donnayafauna Otkryto. Okeanicheskikh. Podnyatij. Severnaya. Atlantika]. Trudy Instituta Okeanologii im. P.P. Shirshova 120: 96 - 136" title="Mnogoshchetinkovye chervi khrebta Reikyanes (Severnaya Atlantika) [Polychaetous worms from the Reykjanes Ridge (the North Atlantic). Bottom Fauna from Mid-Ocean Rises in the North Atlantic. Donnayafauna Otkryto. Okeanicheskikh. Podnyatij. Severnaya. Atlantika]. Trudy Instituta Okeanologii im. P. P." volume="120" year="1985">Detinova (1985)</bibRefCitation>
differentiated her species from
<taxonomicName id="D4B798DEC20A37176E40D77BEC24E1D1" lsidName="O. simplex" pageId="0" pageNumber="1" rank="species" species="simplex">
<emphasis id="F2DB21FE93A26DB0DB6D6E41576B61B9" italics="true" pageId="0" pageNumber="1">O. simplex</emphasis>
</taxonomicName>
by having first four chaetigers triannulate rather than uniannulate. However, there appears to be a typographical mistake in description of
<taxonomicName id="FEB5BAED645B4B1CAE2BFF7154F049EE" lsidName="O. simplex" pageId="0" pageNumber="1" rank="species" species="simplex">
<emphasis id="CC242B65A5E7D71D204ED45B0370DD55" italics="true" pageId="0" pageNumber="1">O. simplex</emphasis>
</taxonomicName>
by
<bibRefCitation id="28EAAE853084A1AF04D2E19098E0C3A6" DOI="https://doi.org/10.1080/00222937800770291" author="Kudenov, JD" journalOrPublisher="Journal of Natural History" pageId="0" pageNumber="1" pagination="427 - 444" refId="B55" refString="Kudenov, JD, Blake, JA, 1978. A review of the genera and species of the Scalibregmidae (Polychaeta) with descriptions of one new genus and three new species from Australia. Journal of Natural History 12: 427 - 444" title="A review of the genera and species of the Scalibregmidae (Polychaeta) with descriptions of one new genus and three new species from Australia." url="https://doi.org/10.1080/00222937800770291" volume="12" year="1978">Kudenov and Blake (1978)</bibRefCitation>
, as the authors state: &quot;Body segments are annulated as follows: chaetigers 1-12 are uniannulate; 3-4 biannulate; 5-12 (? or 15) quadriannulate.&quot; It is likely that chaetigers 1 and 2 not 1 to 12 are uniannulate.
<taxonomicName id="1DB8FD21DE6CAFF24B9D5C2DA7426786" class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma quadrispinosa" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="quadrispinosa">
<emphasis id="F77D734222C6D5FFFDB26232983130F7" italics="true" pageId="0" pageNumber="1">Oligobregma quadrispinosa</emphasis>
</taxonomicName>
has been described from the lower bathyal and abyssal Southern Ocean (Scotia and Weddell Seas, in 2258-4069 m) and is most similar to UKSR species in possessing similar number of chaetigers (
<emphasis id="50CFE2F174A70259CEF6FECAF651AC44" italics="true" pageId="0" pageNumber="1">n</emphasis>
= 28) and podial cirri can be also detected from around chaetiger 13 and 14 [(estimated from the drawing provided in the original description by
<bibRefCitation id="AC6F697C9EF3BB2FD1B14B48B5FDEF12" DOI="https://doi.org/10.11646/zootaxa.1391.1.2" author="Schueller, M" journalOrPublisher="Zootaxa" pageId="0" pageNumber="1" pagination="35 - 45" refId="B88" refString="Schueller, M, Hilbig, B, 2007. Three new species of the genus Oligobregma (Polychaeta, Scalibregmatidae) from the Scotia and Weddell Seas (Antarctica). Zootaxa 1391: 35 - 45" title="Three new species of the genus Oligobregma (Polychaeta, Scalibregmatidae) from the Scotia and Weddell Seas (Antarctica)." url="https://doi.org/10.11646/zootaxa.1391.1.2" volume="1391" year="2007">
<normalizedToken id="EFB1604D5A1117CB0C2445FDD1EB620A" originalValue="Schüller">Schueller</normalizedToken>
and Hilbig (2007)
</bibRefCitation>
]. However, the new species possess spines in both rami of chaetigers 1-4, while
<taxonomicName id="02FF1027C0DC8C9909D155320E18BE5F" lsidName="O. quadrispinosa" pageId="0" pageNumber="1" rank="species" species="quadrispinosa">
<emphasis id="D5FB46FF5C3B7C93AE303728E8DAF147" italics="true" pageId="0" pageNumber="1">O. quadrispinosa</emphasis>
</taxonomicName>
has spines in notopodia only according to
<bibRefCitation id="E0305E7E2F9C0305C4B00D8FB43A1096" DOI="https://doi.org/10.11646/zootaxa.1391.1.2" author="Schueller, M" journalOrPublisher="Zootaxa" pageId="0" pageNumber="1" pagination="35 - 45" refId="B88" refString="Schueller, M, Hilbig, B, 2007. Three new species of the genus Oligobregma (Polychaeta, Scalibregmatidae) from the Scotia and Weddell Seas (Antarctica). Zootaxa 1391: 35 - 45" title="Three new species of the genus Oligobregma (Polychaeta, Scalibregmatidae) from the Scotia and Weddell Seas (Antarctica)." url="https://doi.org/10.11646/zootaxa.1391.1.2" volume="1391" year="2007">
<normalizedToken id="E7E71F294437FB53E874814EABAEF80B" originalValue="Schüller">Schueller</normalizedToken>
and Hilbig (2007)
</bibRefCitation>
.
</paragraph>
</subSubSection>
<subSubSection id="54A2F35F68CA1E0B1E1AF08F181CC0A1" pageId="0" pageNumber="1" type="ecology">
<paragraph id="643D19A917F939E9DE81FD7E67F3BA3B" pageId="0" pageNumber="1">Ecology.</paragraph>
<paragraph id="2D902051EB20DFB258B414BB1AEDDB8C" pageId="0" pageNumber="1">Found in polymetallic nodule province of the eastern CCZ.</paragraph>
</subSubSection>
<subSubSection id="2E65D341704B873C931FECC60DD2040B" pageId="0" pageNumber="1" type="etymology">
<paragraph id="830080C1022A1B775F77B02FABF9982B" pageId="0" pageNumber="1">Etymology.</paragraph>
<paragraph id="9A2BB09D5827D79CA456E0A76E9D475F" pageId="0" pageNumber="1">
Named in honor of Madeleine Brasier, member of the science party of the ABYSSLINE AB02 cruise onboard the RV
<emphasis id="6D36F04F4915C7258E8C9482D95EAD93" italics="true" pageId="0" pageNumber="1">Thomas G. Thompson</emphasis>
.
</paragraph>
</subSubSection>
</treatment>
</document>
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