246 lines
21 KiB
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246 lines
21 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="B3E80ED4A6C252BFB68FD8422B8793C3" docLanguage="en" docName="ZooKeys 938: 1-86" docOrigin="ZooKeys 938" docSource="http://dx.doi.org/10.3897/zookeys.938.49349" docTitle="Aphelochaeta longisetosa" docType="treatment" 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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<treatment ID-GBIF-Taxon="164479475" LSID="urn:lsid:plazi:treatment:B3E80ED4A6C252BFB68FD8422B8793C3" httpUri="http://treatment.plazi.org/id/B3E80ED4A6C252BFB68FD8422B8793C3" 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="B3E80ED4-A6C2-52BF-B68F-D8422B8793C3" authority="(Hartmann-Schroeder, 1965)" baseAuthorityName="Hartmann-Schroeder" baseAuthorityYear="1965" class="Polychaeta" family="Polynoidae" genus="Aphelochaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Aphelochaeta longisetosa" order="Phyllodocida" pageId="0" pageNumber="1" phylum="Annelida" rank="species" species="longisetosa">
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Aphelochaeta cf. longisetosa (
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<normalizedToken originalValue="Hartmann-Schröder">Hartmann-Schroeder</normalizedToken>
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, 1965)
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</taxonomicName>
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<figureCitation captionStart="Figure 21" captionStartId="F21" captionText="Figure 21. Aphelochaeta cf. longisetosa Falkland Islands specimen a dorso-lateral view of anterior of specimen b ventral view of anterior c close-up showing arrangement of dorsal tentacles and first branchiae d pygidium." figureDoi="10.3897/zookeys.938.49349.figure21" httpUri="https://binary.pensoft.net/fig/417699" pageId="0" pageNumber="1">Figures 21</figureCitation>
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<figureCitation captionStart="Figure 22" captionStartId="F22" captionText="Figure 22. Aphelochaeta cf. longisetosa Falkland Islands specimen - MGSP plate a ventrolateral view of anterior end b dorsal view of anterior end." figureDoi="10.3897/zookeys.938.49349.figure22" httpUri="https://binary.pensoft.net/fig/417700" pageId="0" pageNumber="1">, 22</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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Sample 16MFC, 459 m,
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<geoCoordinate degrees="49.268443" direction="south" orientation="latitude" precision="1" value="-49.268444">-49.268443</geoCoordinate>
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,
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<geoCoordinate degrees="59.085888" direction="west" orientation="longitude" precision="1" value="-59.085888">-59.085888</geoCoordinate>
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, coll. 25/04/2012, ind. 1, NHM.2018.21707; Sample 60MFA, 450 m,
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<geoCoordinate degrees="49.254527" direction="south" orientation="latitude" precision="1" value="-49.254528">-49.254527</geoCoordinate>
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,
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<geoCoordinate degrees="59.049453" direction="west" orientation="longitude" precision="1" value="-59.049454">-59.049453</geoCoordinate>
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, coll. 18/03/2012, ind. 1, NHM.2018.21754; Sample 20MFB, 451 m,
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<geoCoordinate degrees="49.286853" direction="south" orientation="latitude" precision="1" value="-49.286854">-49.286853</geoCoordinate>
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,
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<geoCoordinate degrees="59.140553" direction="west" orientation="longitude" precision="1" value="-59.140553">-59.140553</geoCoordinate>
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, coll. 23/04/2012, ind. 2, NHM.2018.12702-12703.
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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">
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Specimen 16 MFC anterior fragment 16.3mm long with 79 chaetigers, specimen 60 MFA 11mm long with 67 chaetigers. Body widening gradually in thorax region, dorsally hump-backed, thoracic chaetigers crowded, narrow, wider than long, becoming longer and more flaccid in abdominal chaetigers; ventrally, groove present from mid thorax down the body (Fig.
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<figureCitation captionStart="Figure 21" captionStartId="F21" captionText="Figure 21. Aphelochaeta cf. longisetosa Falkland Islands specimen a dorso-lateral view of anterior of specimen b ventral view of anterior c close-up showing arrangement of dorsal tentacles and first branchiae d pygidium." figureDoi="10.3897/zookeys.938.49349.figure21" httpUri="https://binary.pensoft.net/fig/417699" pageId="0" pageNumber="1">21b</figureCitation>
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).
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</paragraph>
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<paragraph pageId="0" pageNumber="1">
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Prostomium conical, bluntly pointed. Peristomium wider than long, domed dorsal crest over first two annulations of peristomium, three annulations seen laterally and horizontally (Fig.
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<figureCitation captionStart="Figure 21" captionStartId="F21" captionText="Figure 21. Aphelochaeta cf. longisetosa Falkland Islands specimen a dorso-lateral view of anterior of specimen b ventral view of anterior c close-up showing arrangement of dorsal tentacles and first branchiae d pygidium." figureDoi="10.3897/zookeys.938.49349.figure21" httpUri="https://binary.pensoft.net/fig/417699" pageId="0" pageNumber="1">21a, c</figureCitation>
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). Dorsal tentacles separated, situated laterally on distal edge of peristomium and first chaetiger, dorsal and proximal to first branchiae (Fig.
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<figureCitation captionStart="Figure 21" captionStartId="F21" captionText="Figure 21. Aphelochaeta cf. longisetosa Falkland Islands specimen a dorso-lateral view of anterior of specimen b ventral view of anterior c close-up showing arrangement of dorsal tentacles and first branchiae d pygidium." figureDoi="10.3897/zookeys.938.49349.figure21" httpUri="https://binary.pensoft.net/fig/417699" pageId="0" pageNumber="1">21c</figureCitation>
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). Following branchiae situated dorsal to notochaetae separated by at least one branchial diameter from dorsalmost notochaetae.
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</paragraph>
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<caption doi="10.3897/zookeys.938.49349.figure21" httpUri="https://binary.pensoft.net/fig/417699" pageId="0" pageNumber="1" start="Figure 21" startId="F21">
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" pageId="0" pageNumber="1">Figure 21.</emphasis>
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<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>
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Falkland Islands specimen
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<emphasis bold="true" pageId="0" pageNumber="1">a</emphasis>
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dorso-lateral view of anterior of specimen
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<emphasis bold="true" pageId="0" pageNumber="1">b</emphasis>
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ventral view of anterior
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<emphasis bold="true" pageId="0" pageNumber="1">c</emphasis>
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close-up showing arrangement of dorsal tentacles and first branchiae
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<emphasis bold="true" pageId="0" pageNumber="1">d</emphasis>
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pygidium.
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</paragraph>
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</caption>
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<paragraph pageId="0" pageNumber="1">
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Chaetae positioned laterally in thoracic segments. Thoracic notochaetae of two sizes, long capillaries approximately up to 10 chaetigers long, giving specimens
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<normalizedToken originalValue="a‘silky’">a'silky'</normalizedToken>
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appearance, long chaetae similar in length perhaps slightly longer in distalmost thoracic chaetigers; thoracic neurochaetae slightly shorter; 7-10 notochaetae and 6-8 neurochaetae per fascicle. Abdominal notochaetae fewer in number than neurochaetae and less dense than in thoracic chaetigers; a few long chaetae appear from anterior thoracic chaetigers and occur down body into the abdominal chaetigers, shorter capillaries less than six chaetigers in length also present.
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</paragraph>
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<paragraph pageId="0" pageNumber="1">
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Pygidial region expanded, pygidium with lobes the ventralmost enlarged and pointed (Figs
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<figureCitation captionStart="Figure 21" captionStartId="F21" captionText="Figure 21. Aphelochaeta cf. longisetosa Falkland Islands specimen a dorso-lateral view of anterior of specimen b ventral view of anterior c close-up showing arrangement of dorsal tentacles and first branchiae d pygidium." figureDoi="10.3897/zookeys.938.49349.figure21" httpUri="https://binary.pensoft.net/fig/417699" pageId="0" pageNumber="1">21d</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">24a</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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Falkland Islands specimens with band or spot on ventral prostomial region extending into mouth, diffuse staining on sides of peristomium, distinct partial bands ventrally on thoracic chaetigers along edges of the chaetigers, becoming denser in mid and proximal thoracic chaetigers, some banding dorsally on thoracic chaetigers (Fig.
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<figureCitation captionStart="Figure 22" captionStartId="F22" captionText="Figure 22. Aphelochaeta cf. longisetosa Falkland Islands specimen - MGSP plate a ventrolateral view of anterior end b dorsal view of anterior end." figureDoi="10.3897/zookeys.938.49349.figure22" httpUri="https://binary.pensoft.net/fig/417700" pageId="0" pageNumber="1">22</figureCitation>
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).
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</paragraph>
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<caption doi="10.3897/zookeys.938.49349.figure22" httpUri="https://binary.pensoft.net/fig/417700" pageId="0" pageNumber="1" start="Figure 22" startId="F22">
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" pageId="0" pageNumber="1">Figure 22.</emphasis>
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<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>
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Falkland Islands specimen - MGSP plate
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<emphasis bold="true" pageId="0" pageNumber="1">a</emphasis>
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ventrolateral view of anterior end
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<emphasis bold="true" pageId="0" pageNumber="1">b</emphasis>
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dorsal view of anterior end.
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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 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>
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(
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<normalizedToken originalValue="Hartmann-Schröder">Hartmann-Schroeder</normalizedToken>
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, 1965) was identified from a number of samples during the contract, but only a few specimens have so far been registered in the
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<normalizedToken originalValue="Museum’s">Museum's</normalizedToken>
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collection. The Falkland Islands specimens closely resemble
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<normalizedToken originalValue="Hartmann-Schröder’s">Hartmann-Schroeder's</normalizedToken>
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holotype, particularly in possessing the long silky chaetae (see Table
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<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>
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). The Falkland Islands specimens differ in the shape of the body; they show a distinct staining pattern which is absent in
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<taxonomicName lsidName="A. longisetosa" pageId="0" pageNumber="1" rank="species" species="longisetosa">
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<emphasis italics="true" pageId="0" pageNumber="1">A. longisetosa</emphasis>
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</taxonomicName>
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; however, this might be due to difference in the age of the specimens, and the abdominal notochaetae are fewer in number than neurochaetae and less dense than in thoracic chaetigers. Given these observations and that the Falkland Islands lie outside the previous range of
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<taxonomicName lsidName="A. longisetosa" pageId="0" pageNumber="1" rank="species" species="longisetosa">
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<emphasis italics="true" pageId="0" pageNumber="1">A. longisetosa</emphasis>
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</taxonomicName>
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we are taking a cautious position and assigning the specimens to
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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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</paragraph>
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<paragraph pageId="0" pageNumber="1">
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<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>
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resembles
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<taxonomicName lsidName="A. falklandica" pageId="0" pageNumber="1" rank="species" species="falklandica">
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<emphasis italics="true" pageId="0" pageNumber="1">A. falklandica</emphasis>
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</taxonomicName>
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sp. nov. having similar MGSP but differs in the shape of the body,
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<taxonomicName lsidName="A. longisetosa" pageId="0" pageNumber="1" rank="species" species="longisetosa">A. cf. longisetosa</taxonomicName>
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has a near cylindrical body with only a slight widening in the proximal thoracic region and with no obvious junction between the thorax and abdomen, whereas in
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<taxonomicName lsidName="A. falklandica" pageId="0" pageNumber="1" rank="species" species="falklandica">
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<emphasis italics="true" pageId="0" pageNumber="1">A. falklandica</emphasis>
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</taxonomicName>
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sp. nov. the thorax is flat with the body widening in the thoracic region and narrowing again at the junction between the thorax and abdomen; finally, the pygidium has an extended lobe with a pointed tip, whereas
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<taxonomicName lsidName="A. falklandica" pageId="0" pageNumber="1" rank="species" species="falklandica">
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<emphasis italics="true" pageId="0" pageNumber="1">A. falklandica</emphasis>
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</taxonomicName>
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sp. nov. has a rounded ventral lobe. Such differences appear to be consistent and so it has been decided to consider them as separate species.
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</paragraph>
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<paragraph pageId="0" pageNumber="1">
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In terms of other known
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<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">
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<emphasis italics="true" pageId="0" pageNumber="1">Aphelochaeta</emphasis>
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</taxonomicName>
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species in the region,
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<taxonomicName lsidName="A. longisetosa" pageId="0" pageNumber="1" rank="species" species="longisetosa">A. cf. longisetosa</taxonomicName>
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resembles
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<taxonomicName lsidName="A. malefica" pageId="0" pageNumber="1" rank="species" species="malefica">
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<emphasis italics="true" pageId="0" pageNumber="1">A. malefica</emphasis>
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</taxonomicName>
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Elias & Rivero, 2009, in the body shape as the species from the River Plate has a body more uniform in width. However, the two species differ in that the peristomium is much shorter in the Falkland Islands specimens, only as long as wide, whereas in
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<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 the peristomium is longer than wide in the position of the dorsal tentacles and first branchiae and that the latter also has the peristomium extending back displacing the first chaetiger, while
|
||
<taxonomicName lsidName="A. longisetosa" pageId="0" pageNumber="1" rank="species" species="longisetosa">A. cf. longisetosa</taxonomicName>
|
||
the junction is not displaced proximally. The MGSP for the two species is also different. The Falkland Islands species have only diffuse staining in the peristomium and prostomium while
|
||
<taxonomicName lsidName="A. malefica" pageId="0" pageNumber="1" rank="species" species="malefica">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">A. malefica</emphasis>
|
||
</taxonomicName>
|
||
has these areas darkly stained.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection pageId="0" pageNumber="1" type="distribution">
|
||
<paragraph pageId="0" pageNumber="1">Distribution.</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">NW Falkland Islands at depths of 400-500 m.</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |