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<document 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="5" 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="1668167974120" updateUser="ExternalLinkService">
<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo>
<mods:title>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 type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Wiklund, Helena</mods:namePart>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Neal, Lenka</mods:namePart>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Glover, Adrian G.</mods:namePart>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Drennan, Regan</mods:namePart>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Muriel Rabone,</mods:namePart>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Dahlgren, Thomas G.</mods:namePart>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
<mods:relatedItem type="host">
<mods:titleInfo>
<mods:title>ZooKeys</mods:title>
</mods:titleInfo>
<mods:part>
<mods:date>2019</mods:date>
<mods:detail type="volume">
<mods:number>883</mods:number>
</mods:detail>
<mods:extent unit="page">
<mods:start>1</mods:start>
<mods:end>82</mods:end>
</mods:extent>
</mods:part>
</mods:relatedItem>
<mods:location>
<mods:url>http://dx.doi.org/10.3897/zookeys.883.36193</mods:url>
</mods:location>
<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">http://dx.doi.org/10.3897/zookeys.883.36193</mods:identifier>
<mods:identifier type="Pensoft-Pub">1313-2970-883-1</mods:identifier>
<mods:identifier type="ZooBank">7ABDE7F0DD424B968A1380E1E59B1515</mods:identifier>
<mods:identifier type="Pensoft-UUID">EAC9B5058CE55C5AA9A344F6FEFA25D5</mods:identifier>
</mods:mods>
<treatment 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">
<subSubSection pageId="0" pageNumber="1" type="nomenclature">
<paragraph pageId="0" pageNumber="1">
<taxonomicName LSID="553830CF-ABB9-572E-93EC-A8BA7DB544E5" class="Polychaeta" family="Capitellidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma brasierae" order="Capitellida" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="brasierae">Oligobregma brasierae</taxonomicName>
<taxonomicNameLabel pageId="0" pageNumber="1">sp. nov.</taxonomicNameLabel>
<figureCitation 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 originalValue="A–J">A-J</normalizedToken>
</figureCitation>
,
<figureCitation 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 originalValue="A–C">A-C</normalizedToken>
</figureCitation>
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="1" type="materials_examined">
<paragraph pageId="0" pageNumber="1">Material examined.</paragraph>
<paragraph pageId="0" pageNumber="1">
NHM_032 NHMUK ANEA 2019.7150, coll. 09 Oct. 2013,
<geoCoordinate degrees="13" direction="north" minutes="50.232" orientation="latitude" precision="1" value="13.8372">13°50.232N</geoCoordinate>
,
<geoCoordinate 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 degrees="13" direction="north" minutes="51.797" orientation="latitude" precision="1" value="13.863283">13°51.797N</geoCoordinate>
,
<geoCoordinate 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 bold="true" pageId="0" pageNumber="1">paratype</emphasis>
) NHMUK ANEA 2019.7152, coll. 20 Feb. 2015,
<geoCoordinate degrees="12" direction="north" minutes="32.23" orientation="latitude" precision="9" value="12.537167">12°32.23N</geoCoordinate>
,
<geoCoordinate 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 bold="true" pageId="0" pageNumber="1">(holotype)</emphasis>
NHMUK ANEA 2019.7153, coll. 20 Feb. 2015,
<geoCoordinate degrees="12" direction="north" minutes="32.23" orientation="latitude" precision="9" value="12.537167">12°32.23N</geoCoordinate>
,
<geoCoordinate 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 bold="true" pageId="0" pageNumber="1">paratype</emphasis>
) NHMUK ANEA 2019.7154, coll. 03 Mar. 2015,
<geoCoordinate degrees="12" direction="north" minutes="27.26" orientation="latitude" precision="9" value="12.454333">12°27.26N</geoCoordinate>
,
<geoCoordinate 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 degrees="12" direction="north" minutes="02.49" orientation="latitude" precision="9" value="12.0415">12°02.49N</geoCoordinate>
,
<geoCoordinate 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 pageId="0" pageNumber="1" type="type locality">
<paragraph pageId="0" pageNumber="1">Type locality.</paragraph>
<paragraph pageId="0" pageNumber="1">
Pacific Ocean, CCZ,
<geoCoordinate degrees="12" direction="north" minutes="32.23" orientation="latitude" precision="9" value="12.537167">12°32.23N</geoCoordinate>
,
<geoCoordinate 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 pageId="0" pageNumber="1" type="description">
<paragraph pageId="0" pageNumber="1">Description.</paragraph>
<paragraph 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 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 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 doi="10.3897/zookeys.883.36193.figure24" httpUri="https://binary.pensoft.net/fig/350276" pageId="0" pageNumber="1" start="Figure 24" startId="F24">
<paragraph pageId="0" pageNumber="1">
<emphasis bold="true" pageId="0" pageNumber="1">Figure 24.</emphasis>
<taxonomicName class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma brasierae" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="brasierae">
<emphasis italics="true" pageId="0" pageNumber="1">Oligobregma brasierae</emphasis>
</taxonomicName>
sp. nov.
<emphasis bold="true" pageId="0" pageNumber="1">A</emphasis>
Lab image, whole specimen (holotype [specimen NHM_823], pre-staining)
<emphasis bold="true" pageId="0" pageNumber="1">B</emphasis>
Lab image, dorsal anterior (holotype, faded stain, h = prostomial horns, pe = peristomial ring)
<emphasis bold="true" pageId="0" pageNumber="1">C</emphasis>
Lab image, dorsal segments, quadriannulate chaetigers (holotype, faded stain)
<emphasis bold="true" pageId="0" pageNumber="1">D</emphasis>
Lab image, ventral segments (holotype, faded stain, vm = ventral midline)
<emphasis bold="true" pageId="0" pageNumber="1">E</emphasis>
Lab image, ventral anterior, (holotype, pre-staining)
<emphasis 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 bold="true" pageId="0" pageNumber="1">G</emphasis>
Lab image, detail of dorsal cirrus (paratype NHM_684, ig = internal gland)
<emphasis 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 bold="true" pageId="0" pageNumber="1">I</emphasis>
Lab image, detail of capillary and lyrate chaetae (paratype NHM_684)
<emphasis 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 bold="true" pageId="0" pageNumber="1">
<normalizedToken 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 bold="true" pageId="0" pageNumber="1">A, E</emphasis>
); 50
<normalizedToken originalValue="μm">μm</normalizedToken>
(
<emphasis bold="true" pageId="0" pageNumber="1">G</emphasis>
); 25
<normalizedToken originalValue="μm">μm</normalizedToken>
(
<emphasis bold="true" pageId="0" pageNumber="1">H, I</emphasis>
); 100
<normalizedToken originalValue="μm">μm</normalizedToken>
(
<emphasis bold="true" pageId="0" pageNumber="1">J</emphasis>
).
</paragraph>
</caption>
<caption doi="10.3897/zookeys.883.36193.figure25" httpUri="https://binary.pensoft.net/fig/350277" pageId="0" pageNumber="1" start="Figure 25" startId="F25">
<paragraph pageId="0" pageNumber="1">
<emphasis bold="true" pageId="0" pageNumber="1">Figure 25.</emphasis>
<taxonomicName class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma brasierae" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="brasierae">
<emphasis italics="true" pageId="0" pageNumber="1">Oligobregma brasierae</emphasis>
</taxonomicName>
sp. nov.
<emphasis bold="true" pageId="0" pageNumber="1">A</emphasis>
Live image, whole specimen, ventral view (holotype [specimen NHM_823])
<emphasis bold="true" pageId="0" pageNumber="1">B</emphasis>
Live image, whole specimen, dorsal view (paratype NHM_684)
<emphasis 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 pageId="0" pageNumber="1">
Anterior body segments smooth, no obvious annulation of raised pads detected (even after staining) (
<figureCitation 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 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 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 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 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 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 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 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 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 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 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 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 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 pageId="0" pageNumber="1">
Curved acicular spines present in notopodia and neuropodia on chaetigers 1-4 (
<figureCitation 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 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 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 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 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 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 pageId="0" pageNumber="1" type="genetic data">
<paragraph pageId="0" pageNumber="1">Genetic data.</paragraph>
<paragraph 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 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 lsidName="O. brasierae" pageId="0" pageNumber="1" rank="species" species="brasierae">
<emphasis italics="true" pageId="0" pageNumber="1">O. brasierae</emphasis>
</taxonomicName>
and the already published sequences with accession numbers KJ736359-KJ736363. The three
<taxonomicName class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma" pageId="0" pageNumber="1" phylum="Annelida" rank="genus">
<emphasis italics="true" pageId="0" pageNumber="1">Oligobregma</emphasis>
</taxonomicName>
species in this study form a well-supported clade in our phylogenetic analyses, with
<taxonomicName class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma brasierae" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="brasierae">
<emphasis italics="true" pageId="0" pageNumber="1">Oligobregma brasierae</emphasis>
</taxonomicName>
sp. nov. as sister to
<taxonomicName class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma tani" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="tani">
<emphasis italics="true" pageId="0" pageNumber="1">Oligobregma tani</emphasis>
</taxonomicName>
sp. nov. (
<figureCitation 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 pageId="0" pageNumber="1" type="remarks">
<paragraph pageId="0" pageNumber="1">Remarks.</paragraph>
<paragraph pageId="0" pageNumber="1">
Currently, there are nine valid species assigned to the genus
<taxonomicName class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma" pageId="0" pageNumber="1" phylum="Annelida" rank="genus">
<emphasis italics="true" pageId="0" pageNumber="1">Oligobregma</emphasis>
</taxonomicName>
(
<bibRefCitation 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 lsidName="O. blakei" pageId="0" pageNumber="1" rank="species" species="blakei">
<emphasis italics="true" pageId="0" pageNumber="1">O. blakei</emphasis>
</taxonomicName>
<normalizedToken originalValue="Schüller">Schueller</normalizedToken>
&amp; Hilbig, 2007 considered a nomen dubium. All three
<taxonomicName class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma" pageId="0" pageNumber="1" phylum="Annelida" rank="genus">
<emphasis 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 lsidName="O. pseudocollare" pageId="0" pageNumber="1" rank="species" species="pseudocollare">
<emphasis italics="true" pageId="0" pageNumber="1">O. pseudocollare</emphasis>
</taxonomicName>
<normalizedToken originalValue="Schüller">Schueller</normalizedToken>
&amp; Hilbig, 2007,
<taxonomicName lsidName="O. oculata" pageId="0" pageNumber="1" rank="species" species="oculata">
<emphasis italics="true" pageId="0" pageNumber="1">O. oculata</emphasis>
</taxonomicName>
Kudenov &amp; Blake, 1978) or three (
<taxonomicName lsidName="O. mucronata" pageId="0" pageNumber="1" rank="species" species="mucronata">
<emphasis italics="true" pageId="0" pageNumber="1">O. mucronata</emphasis>
</taxonomicName>
Blake, 2015,
<taxonomicName lsidName="O. aciculata" pageId="0" pageNumber="1" rank="species" species="aciculata">
<emphasis italics="true" pageId="0" pageNumber="1">O. aciculata</emphasis>
</taxonomicName>
(Hartman, 1965),
<taxonomicName lsidName="O. collare" pageId="0" pageNumber="1" rank="species" species="collare">
<emphasis italics="true" pageId="0" pageNumber="1">O. collare</emphasis>
</taxonomicName>
(Levenstein, 1975),
<taxonomicName lsidName="O. notiale" pageId="0" pageNumber="1" rank="species" species="notiale">
<emphasis italics="true" pageId="0" pageNumber="1">O. notiale</emphasis>
</taxonomicName>
Blake, 1981) anterior chaetigers only.
</paragraph>
<paragraph pageId="0" pageNumber="1">
More specifically,
<taxonomicName class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma simplex" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="simplex">
<emphasis italics="true" pageId="0" pageNumber="1">Oligobregma simplex</emphasis>
</taxonomicName>
Kudenov &amp; Blake, 1978,
<taxonomicName lsidName="O. lonchochaeta" pageId="0" pageNumber="1" rank="species" species="lonchochaeta">
<emphasis italics="true" pageId="0" pageNumber="1">O. lonchochaeta</emphasis>
</taxonomicName>
Detinova, 1985 and
<taxonomicName lsidName="O. quadrispinosa" pageId="0" pageNumber="1" rank="species" species="quadrispinosa">
<emphasis italics="true" pageId="0" pageNumber="1">O. quadrispinosa</emphasis>
</taxonomicName>
<normalizedToken originalValue="Schüller">Schueller</normalizedToken>
&amp; Hilbig, 2007 share the presence of spines in chaetigers 1-4 with
<taxonomicName lsidName="O. brasieri" pageId="0" pageNumber="1" rank="species" species="brasieri">
<emphasis italics="true" pageId="0" pageNumber="1">O. brasieri</emphasis>
</taxonomicName>
sp. nov., as well as having relatively large posterior dorsal and ventral cirri.
<taxonomicName class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma simplex" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="simplex">
<emphasis 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 class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma lonchochaeta" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="lonchochaeta">
<emphasis 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 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 lsidName="O. simplex" pageId="0" pageNumber="1" rank="species" species="simplex">
<emphasis 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 lsidName="O. simplex" pageId="0" pageNumber="1" rank="species" species="simplex">
<emphasis italics="true" pageId="0" pageNumber="1">O. simplex</emphasis>
</taxonomicName>
by
<bibRefCitation 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 class="Polychaeta" family="Scalibregmatidae" genus="Oligobregma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Oligobregma quadrispinosa" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="quadrispinosa">
<emphasis 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 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 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 originalValue="Schüller">Schueller</normalizedToken>
and Hilbig (2007)
</bibRefCitation>
]. However, the new species possess spines in both rami of chaetigers 1-4, while
<taxonomicName lsidName="O. quadrispinosa" pageId="0" pageNumber="1" rank="species" species="quadrispinosa">
<emphasis italics="true" pageId="0" pageNumber="1">O. quadrispinosa</emphasis>
</taxonomicName>
has spines in notopodia only according to
<bibRefCitation 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 originalValue="Schüller">Schueller</normalizedToken>
and Hilbig (2007)
</bibRefCitation>
.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="1" type="ecology">
<paragraph pageId="0" pageNumber="1">Ecology.</paragraph>
<paragraph pageId="0" pageNumber="1">Found in polymetallic nodule province of the eastern CCZ.</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="1" type="etymology">
<paragraph pageId="0" pageNumber="1">Etymology.</paragraph>
<paragraph pageId="0" pageNumber="1">
Named in honor of Madeleine Brasier, member of the science party of the ABYSSLINE AB02 cruise onboard the RV
<emphasis italics="true" pageId="0" pageNumber="1">Thomas G. Thompson</emphasis>
.
</paragraph>
</subSubSection>
</treatment>
</document>
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