370 lines
35 KiB
XML
370 lines
35 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/zookeys.938.49349" ID-GBIF-Dataset="1070bebf-afc9-40dd-a16e-24bd6821469d" ID-PMC="PMC7286948" ID-Pensoft-Pub="1313-2970-938-1" ID-Pensoft-UUID="A7E05382096E5182BD65560002045C47" ID-PubMed="32549744" ID-ZooBank="76B7FF03FEB14884AD2955BE864F0EBF" ModsDocID="1313-2970-938-1" checkinTime="1591212709532" checkinUser="pensoft" docAuthor="Neal, Lenka, Paterson, Gordon L. J., Blockley, David, Scott, Ben, Sherlock, Emma, Huque, Cate & Glover, Adrian G." docDate="2020" docId="6E46C0CB2BB7585D97D61226712CEB93" docLanguage="en" docName="ZooKeys 938: 1-86" docOrigin="ZooKeys 938" docSource="http://dx.doi.org/10.3897/zookeys.938.49349" docTitle="Aphelochaeta falklandica Paterson & Neal 2020, sp. nov." docType="treatment" docUuid="7314F6D0-4EEB-4C45-9F02-0251A55044E2" docUuidSource="ZooBank" docVersion="5" id="A7E05382096E5182BD65560002045C47" lastPageNumber="1" masterDocId="A7E05382096E5182BD65560002045C47" masterDocTitle="Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration" masterLastPageNumber="86" masterPageNumber="1" pageNumber="1" updateTime="1668168912013" updateUser="ExternalLinkService">
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<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
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<mods:titleInfo>
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<mods:title>Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration</mods:title>
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</mods:titleInfo>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Neal, Lenka</mods:namePart>
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<mods:affiliation>Natural History Museum, London, UK</mods:affiliation>
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<mods:nameIdentifier type="email">l.nealova@nhm.ac.uk</mods:nameIdentifier>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Paterson, Gordon L. J.</mods:namePart>
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<mods:affiliation>Natural History Museum, London, UK</mods:affiliation>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Blockley, David</mods:namePart>
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<mods:affiliation>Greenland Institute of Natural Resources, Nuuk, Greenland</mods:affiliation>
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<mods:nameIdentifier type="orcid">https://orcid.org/0000-0002-6368-1101</mods:nameIdentifier>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Scott, Ben</mods:namePart>
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<mods:affiliation>Natural History Museum, London, UK</mods:affiliation>
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<mods:nameIdentifier type="orcid">https://orcid.org/0000-0002-5590-7174</mods:nameIdentifier>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Sherlock, Emma</mods:namePart>
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<mods:affiliation>Natural History Museum, London, UK</mods:affiliation>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Huque, Cate</mods:namePart>
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<mods:affiliation>Natural History Museum, London, UK</mods:affiliation>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Glover, Adrian G.</mods:namePart>
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<mods:affiliation>Natural History Museum, London, UK</mods:affiliation>
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</mods:name>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:relatedItem type="host">
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<mods:titleInfo>
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<mods:title>ZooKeys</mods:title>
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</mods:titleInfo>
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<mods:part>
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<mods:date>2020</mods:date>
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<mods:detail type="volume">
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<mods:number>938</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>1</mods:start>
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<mods:end>86</mods:end>
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</mods:extent>
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</mods:part>
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<mods:location>
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<mods:url>http://dx.doi.org/10.3897/zookeys.938.49349</mods:url>
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</mods:location>
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<mods:classification>journal article</mods:classification>
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<mods:identifier type="DOI">http://dx.doi.org/10.3897/zookeys.938.49349</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1313-2970-938-1</mods:identifier>
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<mods:identifier type="ZooBank">76B7FF03FEB14884AD2955BE864F0EBF</mods:identifier>
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<mods:identifier type="Pensoft-UUID">A7E05382096E5182BD65560002045C47</mods:identifier>
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</mods:mods>
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<treatment ID-GBIF-Taxon="164479476" LSID="urn:lsid:zoobank.org:act:7314F6D0-4EEB-4C45-9F02-0251A55044E2" httpUri="http://treatment.plazi.org/id/6E46C0CB2BB7585D97D61226712CEB93" lastPageNumber="1" pageId="0" pageNumber="1">
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<subSubSection pageId="0" pageNumber="1" type="nomenclature">
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<paragraph pageId="0" pageNumber="1">
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<taxonomicName LSID="6E46C0CB-2BB7-585D-97D6-1226712CEB93" authority="Paterson & Neal" authorityName="Paterson & Neal" authorityYear="2020" class="Polychaeta" family="Polynoidae" genus="Aphelochaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Aphelochaeta falklandica" order="Phyllodocida" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="falklandica" status="sp. nov.">Aphelochaeta falklandica Paterson & Neal</taxonomicName>
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<taxonomicNameLabel pageId="0" pageNumber="1">sp. nov.</taxonomicNameLabel>
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<figureCitation captionStart="Figure 23" captionStartId="F23" captionText="Figure 23. Aphelochaeta falklandica sp. nov. (holotype NHM. 2018.21708), Methyl Green Staining patterns a complete specimen b ventral view of thoracic chaetigers showing methyl green stained bands across the thorax c dorsal view of head and thoracic chaetigers d close up of head region e dorsal view of anterior of specimen stained with Shirla stain showing dorsal tentacles f detail of pygidial region showing anal lobes. Scale bars: 1 mm (a)." figureDoi="10.3897/zookeys.938.49349.figure23" httpUri="https://binary.pensoft.net/fig/417701" pageId="0" pageNumber="1">Figures 23</figureCitation>
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<figureCitation captionStart="Figure 24" captionStartId="F24" captionText="Figure 24. Comparison of Aphelochaeta falklandica sp. nov. and A. cf. longisetosa (Hartmann-Schroeder, 1965). Aphelochaeta cf. longisetosa a drawing of pygidium showing pointed ventral anal lobe b drawing of anterior showing rounded peristomium. Aphelochaeta falklandica sp. nov. c drawing of pygidium showing rounded ventral anal lobe d drawing of anterior showing domed dorsal peristomium and widened flat thoracic chaetigers e detail drawing of prostomium and peristomial area showing arrangement of dorsal tentacles and 1 st branchiae." figureDoi="10.3897/zookeys.938.49349.figure24" httpUri="https://binary.pensoft.net/fig/417702" pageId="0" pageNumber="1">, 24</figureCitation>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="materials_examined">
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<paragraph pageId="0" pageNumber="1">Materials.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Holotype</emphasis>
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: Sample 17MFA, 449 m,
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<geoCoordinate degrees="49.2679625" direction="south" orientation="latitude" precision="1" value="-49.267963">-49.2679625</geoCoordinate>
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,
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<geoCoordinate degrees="59.0563564" direction="west" orientation="longitude" precision="1" value="-59.056355">-59.0563564</geoCoordinate>
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, coll. 15/04/2012, ind. 1, NHM.2018.21708.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Paratypes</emphasis>
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: Sample 31MFA, 442 m,
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<geoCoordinate degrees="49.3230311" direction="south" orientation="latitude" precision="1" value="-49.323032">-49.3230311</geoCoordinate>
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,
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<geoCoordinate degrees="59.1674461" direction="west" orientation="longitude" precision="1" value="-59.167446">-59.1674461</geoCoordinate>
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, coll. 15/04/2012, ind. 1, NHM.2018.21728. Sample 44MFB, 429 m,
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<geoCoordinate degrees="49.3585975" direction="south" orientation="latitude" precision="1" value="-49.358597">-49.3585975</geoCoordinate>
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,
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<geoCoordinate degrees="59.1117606" direction="west" orientation="longitude" precision="1" value="-59.11176">-59.1117606</geoCoordinate>
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, coll. 14/04/2012, ind. 1, NHM.2018.21744. Sample 6MFC, 458 m,
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<geoCoordinate degrees="49.2320192" direction="south" orientation="latitude" precision="1" value="-49.232018">-49.2320192</geoCoordinate>
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,
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<geoCoordinate degrees="59.0316156" direction="west" orientation="longitude" precision="1" value="-59.031616">-59.0316156</geoCoordinate>
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, coll. 25/04/2012, ind. 2, NHM.2018.12714-12715. Sample 66MFA, 445 m,
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<geoCoordinate degrees="49.258322" direction="south" orientation="latitude" precision="1" value="-49.258324">-49.258322</geoCoordinate>
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,
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<geoCoordinate degrees="59.1058241" direction="west" orientation="longitude" precision="1" value="-59.105824">-59.1058241</geoCoordinate>
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, coll. 18/03/2012, ind. 1, NHM 2018.25373. Sample T10MFB, 702 m,
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<geoCoordinate degrees="53.059303" direction="south" orientation="latitude" precision="1" value="-53.059303">-53.059303</geoCoordinate>
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,
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<geoCoordinate degrees="58.026135" direction="west" orientation="longitude" precision="1" value="-58.026134">-58.026135</geoCoordinate>
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, coll. 02/02/2009, ind. 1, NHM.2018.25370.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="description">
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<paragraph pageId="0" pageNumber="1">Description.</paragraph>
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<paragraph pageId="0" pageNumber="1">Holotype NHM.2018.21708, anterior fragment 14.1mm in length with 127 chaetigers. Body widening gradually in thorax then narrowing at junction with abdomen; dorsally flattened; ventrally a shallow groove runs down body from mid to posterior thorax. Thoracic chaetigers much wider than long, crowded; in abdomen chaetigers, as wide as long or longer, before becoming crowded in the pygidial segments.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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Prostomium wide, conical with rounded or
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<normalizedToken originalValue="‘stumpy’">'stumpy'</normalizedToken>
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point. Peristomium as wide as long, with domed dorsal crest; three annulations, first two obvious in lateral and ventral view, interrupted by dorsal crest, third complete dorsally and extending distally into first chaetiger. Dorsal tentacles arising between peristomium and first chaetiger, sometimes appearing to arise in the first chaetiger due to the peristomium extending back into the first chaetiger; dorsal to and on the same level or slightly anterior to first branchiae; second branchial pair close to first pair (Figs
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<figureCitation captionStart="Figure 23" captionStartId="F23" captionText="Figure 23. Aphelochaeta falklandica sp. nov. (holotype NHM. 2018.21708), Methyl Green Staining patterns a complete specimen b ventral view of thoracic chaetigers showing methyl green stained bands across the thorax c dorsal view of head and thoracic chaetigers d close up of head region e dorsal view of anterior of specimen stained with Shirla stain showing dorsal tentacles f detail of pygidial region showing anal lobes. Scale bars: 1 mm (a)." figureDoi="10.3897/zookeys.938.49349.figure23" httpUri="https://binary.pensoft.net/fig/417701" pageId="0" pageNumber="1">23e</figureCitation>
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;
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<figureCitation captionStart="Figure 24" captionStartId="F24" captionText="Figure 24. Comparison of Aphelochaeta falklandica sp. nov. and A. cf. longisetosa (Hartmann-Schroeder, 1965). Aphelochaeta cf. longisetosa a drawing of pygidium showing pointed ventral anal lobe b drawing of anterior showing rounded peristomium. Aphelochaeta falklandica sp. nov. c drawing of pygidium showing rounded ventral anal lobe d drawing of anterior showing domed dorsal peristomium and widened flat thoracic chaetigers e detail drawing of prostomium and peristomial area showing arrangement of dorsal tentacles and 1 st branchiae." figureDoi="10.3897/zookeys.938.49349.figure24" httpUri="https://binary.pensoft.net/fig/417702" pageId="0" pageNumber="1">24e</figureCitation>
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).
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</paragraph>
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<paragraph pageId="0" pageNumber="1">Chaetae all simple capillaries, thoracic notochaetae of two basic lengths-relatively short capillaries ca. four chaetigers in length or equivalent to half the chaetiger width, and longer chaetae of at least ten chaetigers length; long chaetae arising from posterior thoracic region occurring in subsequent chaetigers into abdominal region; 6-10 chaetae per fascicle sometime appearing as if in two groups. Thoracic neurochaetae short capillaries, similar in length as short capillaries in the notopodia; 5-6 chaetae per fascicle. Abdominal notochaetae longer than those of neuropodia, smaller numbers of chaetae in abdominal fascicles than in thorax.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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Pygidium with last 18 segments expanded, anal opening with lobes, ventralmost lobe largest, blunt and extended (Figs
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<figureCitation captionStart="Figure 23" captionStartId="F23" captionText="Figure 23. Aphelochaeta falklandica sp. nov. (holotype NHM. 2018.21708), Methyl Green Staining patterns a complete specimen b ventral view of thoracic chaetigers showing methyl green stained bands across the thorax c dorsal view of head and thoracic chaetigers d close up of head region e dorsal view of anterior of specimen stained with Shirla stain showing dorsal tentacles f detail of pygidial region showing anal lobes. Scale bars: 1 mm (a)." figureDoi="10.3897/zookeys.938.49349.figure23" httpUri="https://binary.pensoft.net/fig/417701" pageId="0" pageNumber="1">23f</figureCitation>
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;
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<figureCitation captionStart="Figure 24" captionStartId="F24" captionText="Figure 24. Comparison of Aphelochaeta falklandica sp. nov. and A. cf. longisetosa (Hartmann-Schroeder, 1965). Aphelochaeta cf. longisetosa a drawing of pygidium showing pointed ventral anal lobe b drawing of anterior showing rounded peristomium. Aphelochaeta falklandica sp. nov. c drawing of pygidium showing rounded ventral anal lobe d drawing of anterior showing domed dorsal peristomium and widened flat thoracic chaetigers e detail drawing of prostomium and peristomial area showing arrangement of dorsal tentacles and 1 st branchiae." figureDoi="10.3897/zookeys.938.49349.figure24" httpUri="https://binary.pensoft.net/fig/417702" pageId="0" pageNumber="1">24c</figureCitation>
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).
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="methyl green stain pattern">
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<paragraph pageId="0" pageNumber="1">Methyl Green stain pattern.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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Band ventral under the prostomium extending into the mouth, narrow bands along lateral and ventral edges of thoracic chaetigers (Fig.
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<figureCitation captionStart="Figure 23" captionStartId="F23" captionText="Figure 23. Aphelochaeta falklandica sp. nov. (holotype NHM. 2018.21708), Methyl Green Staining patterns a complete specimen b ventral view of thoracic chaetigers showing methyl green stained bands across the thorax c dorsal view of head and thoracic chaetigers d close up of head region e dorsal view of anterior of specimen stained with Shirla stain showing dorsal tentacles f detail of pygidial region showing anal lobes. Scale bars: 1 mm (a)." figureDoi="10.3897/zookeys.938.49349.figure23" httpUri="https://binary.pensoft.net/fig/417701" pageId="0" pageNumber="1">23</figureCitation>
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).
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</paragraph>
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<caption doi="10.3897/zookeys.938.49349.figure23" httpUri="https://binary.pensoft.net/fig/417701" pageId="0" pageNumber="1" start="Figure 23" startId="F23">
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" pageId="0" pageNumber="1">Figure 23.</emphasis>
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<taxonomicName authorityName="Paterson & Neal" authorityYear="2020" class="Polychaeta" family="Cirratulidae" genus="Aphelochaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Aphelochaeta falklandica" order="Terebellida" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="falklandica">
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<emphasis italics="true" pageId="0" pageNumber="1">Aphelochaeta falklandica</emphasis>
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</taxonomicName>
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sp. nov. (holotype NHM.2018.21708), Methyl Green Staining patterns
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<emphasis bold="true" pageId="0" pageNumber="1">a</emphasis>
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complete specimen
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<emphasis bold="true" pageId="0" pageNumber="1">b</emphasis>
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ventral view of thoracic chaetigers showing methyl green stained bands across the thorax
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<emphasis bold="true" pageId="0" pageNumber="1">c</emphasis>
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dorsal view of head and thoracic chaetigers
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<emphasis bold="true" pageId="0" pageNumber="1">d</emphasis>
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close up of head region
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<emphasis bold="true" pageId="0" pageNumber="1">e</emphasis>
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dorsal view of anterior of specimen stained with Shirla stain showing dorsal tentacles
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<emphasis bold="true" pageId="0" pageNumber="1">f</emphasis>
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detail of pygidial region showing anal lobes. Scale bars: 1 mm (
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<emphasis bold="true" pageId="0" pageNumber="1">a</emphasis>
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).
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="remarks">
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<paragraph pageId="0" pageNumber="1">Remarks.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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<taxonomicName authorityName="Paterson & Neal" authorityYear="2020" class="Polychaeta" family="Cirratulidae" genus="Aphelochaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Aphelochaeta falklandica" order="Terebellida" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="falklandica">
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<emphasis italics="true" pageId="0" pageNumber="1">Aphelochaeta falklandica</emphasis>
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</taxonomicName>
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sp. nov. is a common species in the Sealion samples. It closely resembles
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<taxonomicName lsidName="A. longisetosa" pageId="0" pageNumber="1" rank="species" species="longisetosa">A. cf. longisetosa</taxonomicName>
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(
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<bibRefCitation author="Hartmann-Schroeder, G" journalOrPublisher="Journal of Marine Scienceand Engineering" pageId="0" pageNumber="1" refId="B27" refString="Hartmann-Schroeder, G, 1965. Zur Kenntnis des Sublitorals der chilenischen Kueste unter besonderer Beruecksichtigung der Polychaeten und Ostracoden: mit Bemerkungen ueber den Einfluss sauerstoffarmer Stroemungen auf die Besiedlung von marinen Sedimenten. Zoologisches Staatsinstitut und Zoologisches Museum." title="Zur Kenntnis des Sublitorals der chilenischen Kueste unter besonderer Beruecksichtigung der Polychaeten und Ostracoden: mit Bemerkungen ueber den Einfluss sauerstoffarmer Stroemungen auf die Besiedlung von marinen Sedimenten. Zoologisches Staatsinstitut und Zoologisches Museum." year="1965">
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<normalizedToken originalValue="Hartmann-Schröder">Hartmann-Schroeder</normalizedToken>
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1965
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</bibRefCitation>
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), differing in being more dorso-ventrally flattened with an obvious widening of the body in the thoracic region, with an obvious junction between the thoracic and abdominal chaetigers and in the blunt shape of the ventral anal lobe (see Figs
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<figureCitation captionStart="Figure 23" captionStartId="F23" captionText="Figure 23. Aphelochaeta falklandica sp. nov. (holotype NHM. 2018.21708), Methyl Green Staining patterns a complete specimen b ventral view of thoracic chaetigers showing methyl green stained bands across the thorax c dorsal view of head and thoracic chaetigers d close up of head region e dorsal view of anterior of specimen stained with Shirla stain showing dorsal tentacles f detail of pygidial region showing anal lobes. Scale bars: 1 mm (a)." figureDoi="10.3897/zookeys.938.49349.figure23" httpUri="https://binary.pensoft.net/fig/417701" pageId="0" pageNumber="1">23f</figureCitation>
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;
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<figureCitation captionStart="Figure 24" captionStartId="F24" captionText="Figure 24. Comparison of Aphelochaeta falklandica sp. nov. and A. cf. longisetosa (Hartmann-Schroeder, 1965). Aphelochaeta cf. longisetosa a drawing of pygidium showing pointed ventral anal lobe b drawing of anterior showing rounded peristomium. Aphelochaeta falklandica sp. nov. c drawing of pygidium showing rounded ventral anal lobe d drawing of anterior showing domed dorsal peristomium and widened flat thoracic chaetigers e detail drawing of prostomium and peristomial area showing arrangement of dorsal tentacles and 1 st branchiae." figureDoi="10.3897/zookeys.938.49349.figure24" httpUri="https://binary.pensoft.net/fig/417702" pageId="0" pageNumber="1">24c</figureCitation>
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). In mixed samples thisspecies can often be distinguished by a full gut obvious in posterior thoracic and anterior abdominal chaetigers and, in fresh material, by the bases of branchiae in the posterior thorax showing as bright red dots. The domed dorsal crest is also characteristic.
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</paragraph>
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<caption doi="10.3897/zookeys.938.49349.figure24" httpUri="https://binary.pensoft.net/fig/417702" pageId="0" pageNumber="1" start="Figure 24" startId="F24">
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" pageId="0" pageNumber="1">Figure 24.</emphasis>
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Comparison of
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<taxonomicName authorityName="Paterson & Neal" authorityYear="2020" class="Polychaeta" family="Cirratulidae" genus="Aphelochaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Aphelochaeta falklandica" order="Terebellida" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="falklandica">
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<emphasis italics="true" pageId="0" pageNumber="1">Aphelochaeta falklandica</emphasis>
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</taxonomicName>
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sp. nov. and
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<taxonomicName lsidName="A. longisetosa" pageId="0" pageNumber="1" rank="species" species="longisetosa">A. cf. longisetosa</taxonomicName>
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(
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<normalizedToken originalValue="Hartmann-Schröder">Hartmann-Schroeder</normalizedToken>
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, 1965).
|
||
<taxonomicName baseAuthorityName="Hartmann-Schroeder" baseAuthorityYear="1965" class="Polychaeta" family="Cirratulidae" genus="Aphelochaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Aphelochaeta longisetosa" order="Terebellida" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="longisetosa">Aphelochaeta cf. longisetosa</taxonomicName>
|
||
<emphasis bold="true" pageId="0" pageNumber="1">a</emphasis>
|
||
drawing of pygidium showing pointed ventral anal lobe
|
||
<emphasis bold="true" pageId="0" pageNumber="1">b</emphasis>
|
||
drawing of anterior showing rounded peristomium.
|
||
<taxonomicName authorityName="Paterson & Neal" authorityYear="2020" class="Polychaeta" family="Cirratulidae" genus="Aphelochaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Aphelochaeta falklandica" order="Terebellida" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="falklandica">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Aphelochaeta falklandica</emphasis>
|
||
</taxonomicName>
|
||
sp. nov.
|
||
<emphasis bold="true" pageId="0" pageNumber="1">c</emphasis>
|
||
drawing of pygidium showing rounded ventral anal lobe
|
||
<emphasis bold="true" pageId="0" pageNumber="1">d</emphasis>
|
||
drawing of anterior showing domed dorsal peristomium and widened flat thoracic chaetigers
|
||
<emphasis bold="true" pageId="0" pageNumber="1">e</emphasis>
|
||
detail drawing of prostomium and peristomial area showing arrangement of dorsal tentacles and 1st branchiae.
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
<taxonomicName authorityName="Paterson & Neal" authorityYear="2020" class="Polychaeta" family="Cirratulidae" genus="Aphelochaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Aphelochaeta falklandica" order="Terebellida" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="falklandica">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Aphelochaeta falklandica</emphasis>
|
||
</taxonomicName>
|
||
sp. nov. closely resembles
|
||
<taxonomicName lsidName="A. palmeri" pageId="0" pageNumber="1" rank="species" species="palmeri">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. palmeri</emphasis>
|
||
</taxonomicName>
|
||
Blake, 2018 and
|
||
<taxonomicName lsidName="A. spectabilis" pageId="0" pageNumber="1" rank="species" species="spectabilis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. spectabilis</emphasis>
|
||
</taxonomicName>
|
||
Blake, 2018 both recently described from Antarctic and South American waters;
|
||
<taxonomicName lsidName="A. falklandica" pageId="0" pageNumber="1" rank="species" species="falklandica">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. falklandica</emphasis>
|
||
</taxonomicName>
|
||
sp. nov. has a similar body shape to these species but appears to differ in the following ways: the definition of the annulation differs slightly in that with
|
||
<taxonomicName lsidName="A. spectabilis" pageId="0" pageNumber="1" rank="species" species="spectabilis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. spectabilis</emphasis>
|
||
</taxonomicName>
|
||
the junctions of the annulations are only weakly defined whereas in
|
||
<taxonomicName lsidName="A. falklandica" pageId="0" pageNumber="1" rank="species" species="falklandica">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. falklandica</emphasis>
|
||
</taxonomicName>
|
||
sp. nov. the junctions of the annulations are distinct although can be less easy to see dorsally if the dorsal crest is well developed. The dorsal tentacles of
|
||
<taxonomicName lsidName="A. spectabilis" pageId="0" pageNumber="1" rank="species" species="spectabilis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. spectabilis</emphasis>
|
||
</taxonomicName>
|
||
arise on the posterior part of the peristomium or in the junction between the peristomium and first chaetiger, with the first branchia arising on the first chaetiger. In
|
||
<taxonomicName lsidName="A. falklandica" pageId="0" pageNumber="1" rank="species" species="falklandica">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. falklandica</emphasis>
|
||
</taxonomicName>
|
||
sp. nov. the dorsal tentacle also arises in the junction between the first chaetiger and peristomium but the first branchia arises ventral to the dorsal tentacle and in the junction between the first chaetiger and the peristomium.
|
||
<taxonomicName authorityName="Paterson & Neal" authorityYear="2020" class="Polychaeta" family="Cirratulidae" genus="Aphelochaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Aphelochaeta falklandica" order="Terebellida" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="falklandica">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Aphelochaeta falklandica</emphasis>
|
||
</taxonomicName>
|
||
sp. nov. has a ventral groove running from the mid to posterior thoracic region of the body.
|
||
<taxonomicName authorityName="Blake" authorityYear="2018" class="Polychaeta" family="Cirratulidae" genus="Aphelochaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Aphelochaeta spectabilis" order="Terebellida" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="spectabilis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Aphelochaeta spectabilis</emphasis>
|
||
</taxonomicName>
|
||
does not have a ventral groove. In
|
||
<taxonomicName lsidName="A. spectabilis" pageId="0" pageNumber="1" rank="species" species="spectabilis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. spectabilis</emphasis>
|
||
</taxonomicName>
|
||
thedevelopment and shape of the posterior chaetigers and pygidial region is fusiform and well developed with a simple pygidium with a rounded lobe, whereas in
|
||
<taxonomicName lsidName="A. falklandica" pageId="0" pageNumber="1" rank="species" species="falklandica">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. falklandica</emphasis>
|
||
</taxonomicName>
|
||
sp. nov. this region is not as fusiform and the pygidium has an extended blunt ventral lobe. The staining pattern for
|
||
<taxonomicName lsidName="A. spectabilis" pageId="0" pageNumber="1" rank="species" species="spectabilis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. spectabilis</emphasis>
|
||
</taxonomicName>
|
||
differs from
|
||
<taxonomicName lsidName="A. falklandica" pageId="0" pageNumber="1" rank="species" species="falklandica">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. falklandica</emphasis>
|
||
</taxonomicName>
|
||
, being more developed occurring dorsally on the peristomium, there is a distinct patch posterior of the mouth and the first chaetiger. These patches are missing from
|
||
<taxonomicName lsidName="A. falklandica" pageId="0" pageNumber="1" rank="species" species="falklandica">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. falklandica</emphasis>
|
||
</taxonomicName>
|
||
sp. nov., but this species has patches on the lateral parts of the peristomium, there is a small band ventrally on the prostomium.
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
The shape of the prostomium in
|
||
<taxonomicName lsidName="A. palmeri" pageId="0" pageNumber="1" rank="species" species="palmeri">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. palmeri</emphasis>
|
||
</taxonomicName>
|
||
is pear-shaped, slightly indented at its junction with the peristomium; the prostomium in
|
||
<taxonomicName lsidName="A. falklandica" pageId="0" pageNumber="1" rank="species" species="falklandica">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. falklandica</emphasis>
|
||
</taxonomicName>
|
||
sp. nov. is conical and with a blunt rounded tip. The dorsal crest in
|
||
<taxonomicName lsidName="A. falklandica" pageId="0" pageNumber="1" rank="species" species="falklandica">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. falklandica</emphasis>
|
||
</taxonomicName>
|
||
is not always well developed and may extend only as far as the second annulation whereas the dorsal crest in
|
||
<taxonomicName lsidName="A. palmeri" pageId="0" pageNumber="1" rank="species" species="palmeri">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. palmeri</emphasis>
|
||
</taxonomicName>
|
||
is usually well developed extending to the end of the peristomium.
|
||
<taxonomicName authorityName="Blake" authorityYear="1991" class="Polychaeta" family="Cirratulidae" genus="Aphelochaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Aphelochaeta" order="Terebellida" pageId="0" pageNumber="1" phylum="Annelida" rank="genus">Aphelochaeta</taxonomicName>
|
||
<taxonomicName authorityName="Blake" authorityYear="2018" class="Polychaeta" family="Cirratulidae" genus="Aphelochaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="palmeri" order="Terebellida" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="palmeri">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">palmeri</emphasis>
|
||
</taxonomicName>
|
||
has a well-developed posterior region with a fusiform shape and a blunt lobed pygidium. In
|
||
<taxonomicName lsidName="A. falklandica" pageId="0" pageNumber="1" rank="species" species="falklandica">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. falklandica</emphasis>
|
||
</taxonomicName>
|
||
sp. nov. this region is not so well developed and expanded. The staining pattern differs in that there are distinct bands ventrally in the prostomium and a large patch laterally on each side of the peristomium in
|
||
<taxonomicName lsidName="A. falklandica" pageId="0" pageNumber="1" rank="species" species="falklandica">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. falklandica</emphasis>
|
||
</taxonomicName>
|
||
sp. nov. which are absent in
|
||
<taxonomicName lsidName="A. palmeri" pageId="0" pageNumber="1" rank="species" species="palmeri">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. palmeri</emphasis>
|
||
</taxonomicName>
|
||
.
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
<taxonomicName authorityName="Paterson & Neal" authorityYear="2020" class="Polychaeta" family="Cirratulidae" genus="Aphelochaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Aphelochaeta falklandica" order="Terebellida" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="falklandica">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Aphelochaeta falklandica</emphasis>
|
||
</taxonomicName>
|
||
sp. nov. can be distinguished from the
|
||
<taxonomicName lsidName="A. malefica" pageId="0" pageNumber="1" rank="species" species="malefica">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. malefica</emphasis>
|
||
</taxonomicName>
|
||
Elias & Rivero, 2009 by the arrangement of the dorsal tentacles, third annulation of the peristomium and MGSP. The shape of the body suggests similarities with
|
||
<taxonomicName lsidName="A. williamsae" pageId="0" pageNumber="1" rank="species" species="williamsae">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. williamsae</emphasis>
|
||
</taxonomicName>
|
||
Blake, 1996 from California but
|
||
<taxonomicName lsidName="A. falklandica" pageId="0" pageNumber="1" rank="species" species="falklandica">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. falklandica</emphasis>
|
||
</taxonomicName>
|
||
sp. nov. differs in MGSP which have banding extending laterally while in
|
||
<taxonomicName lsidName="A. williamsae" pageId="0" pageNumber="1" rank="species" species="williamsae">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. williamsae</emphasis>
|
||
</taxonomicName>
|
||
they do not.
|
||
<taxonomicName authorityName="Paterson & Neal" authorityYear="2020" class="Polychaeta" family="Cirratulidae" genus="Aphelochaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Aphelochaeta falklandica" order="Terebellida" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="falklandica">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Aphelochaeta falklandica</emphasis>
|
||
</taxonomicName>
|
||
sp. nov. differs from the other Californian species in that the dorsal thorax is flattened and ventrally more rounded, whereas most of
|
||
<bibRefCitation author="Blake, JA" editor="Blake, JA" journalOrPublisher="Santa Barbara" pageId="0" pageNumber="1" pagination="71 - 79" refId="B8" refString="Blake, JA, 1996. Family Apistobranchidae Mesnil and Caullery, 1898. In: Blake, JA, Hilbig, B, Scott, PH, Eds., Taxonomic Atlas of the Benthic Fauna of the Santa Maria Basin and Western Santa Barbara Channel. 6 - The Annelida Part 3. Polychaeta: Orbiniidae to Cossuridae. Santa Barbara Museum of Natural History. Santa Barbara 6: 71 - 79" title="Family Apistobranchidae Mesnil and Caullery, 1898." volume="6" volumeTitle="Taxonomic Atlas of the Benthic Fauna of the Santa Maria Basin and Western Santa Barbara Channel. 6 - The Annelida Part 3. Polychaeta: Orbiniidae to Cossuridae. Santa Barbara Museum of Natural History." year="1996">
|
||
<normalizedToken originalValue="Blake’s">Blake's</normalizedToken>
|
||
(1996)
|
||
</bibRefCitation>
|
||
species are dorsal-ventrally rounded or have a rounded (hump-backed) dorsal thoracic shape. Table
|
||
<tableCitation captionStart="Table 3" captionStartId="T3" captionText="Table 3. Table comparing species of Aphelochaeta likely to be found in the Falkland Islands region." httpUri="http://table.plazi.org/id/2EB6507FA07435B023818133290C633A" pageId="0" pageNumber="1" tableUuid="2EB6507FA07435B023818133290C633A">3</tableCitation>
|
||
gives the comparison of
|
||
<taxonomicName authorityName="Blake" authorityYear="1991" class="Polychaeta" family="Cirratulidae" genus="Aphelochaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Aphelochaeta" order="Terebellida" pageId="0" pageNumber="1" phylum="Annelida" rank="genus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Aphelochaeta</emphasis>
|
||
</taxonomicName>
|
||
species that might be found in the Falkland Islands region.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection pageId="0" pageNumber="1" type="etymology">
|
||
<paragraph pageId="0" pageNumber="1">Etymology.</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">This species is named after the Falkland Islands where it was discovered.</paragraph>
|
||
</subSubSection>
|
||
<subSubSection pageId="0" pageNumber="1" type="distribution">
|
||
<paragraph pageId="0" pageNumber="1">Distribution.</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">Recorded from the NW Falkland Islands at depths of 400-500 m</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |