159 lines
12 KiB
XML
159 lines
12 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/zookeys.707.13042" ID-GBIF-Dataset="77aa16c7-25ee-4130-a594-57ed6e914df1" ID-PMC="PMC5674146" ID-Pensoft-Pub="1313-2970-707-1" ID-PubMed="29118626" ID-ZBK="6A0BCD992749450C874B440D0C0A232C" ModsDocAuthor="" ModsDocDate="2017" ModsDocID="1313-2970-707-1" ModsDocOrigin="ZooKeys 707" ModsDocTitle="Abyssal fauna of the UK-1 polymetallic nodule exploration area, Clarion-Clipperton Zone, central Pacific Ocean: Mollusca" checkinTime="1507668034441" checkinUser="pensoft" docAuthor="Wiklund, Helena, Taylor, John D., Dahlgren, Thomas G., Todt, Christiane, Ikebe, Chiho, Rabone, Muriel & Glover, Adrian G." docDate="2017" docId="CC5F0ABB15F6989E849383880CD39530" docLanguage="en" docName="ZooKeys 707: 1-46" docOrigin="ZooKeys 707" docSource="http://dx.doi.org/10.3897/zookeys.707.13042" docTitle="Ledella knudseni Taylor & Wiklund, sp. n." docType="treatment" docUuid="66E692B5-7C61-4ADC-9539-EFC085424147" docUuidSource="ZooBank" docVersion="6" lastPageNumber="9" masterDocId="FFC7FFE8482EB03042654660FFF4EB7D" masterDocTitle="Abyssal fauna of the UK- 1 polymetallic nodule exploration area, Clarion-Clipperton Zone, central Pacific Ocean: Mollusca" masterLastPageNumber="46" masterPageNumber="1" pageNumber="8" updateTime="1668164910568" updateUser="ExternalLinkService">
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<mods:titleInfo>
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<mods:title>Abyssal fauna of the UK- 1 polymetallic nodule exploration area, Clarion-Clipperton Zone, central Pacific Ocean: Mollusca</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>Wiklund, Helena</mods:namePart>
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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>Taylor, John D.</mods:namePart>
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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>Dahlgren, Thomas G.</mods:namePart>
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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>Todt, Christiane</mods:namePart>
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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>Ikebe, Chiho</mods:namePart>
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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>Rabone, Muriel</mods:namePart>
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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:name>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:relatedItem type="host">
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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>2017</mods:date>
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<mods:detail type="volume">
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<mods:number>707</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>46</mods:end>
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</mods:extent>
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<mods:location>
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<mods:url>http://dx.doi.org/10.3897/zookeys.707.13042</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.707.13042</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1313-2970-707-1</mods:identifier>
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<mods:identifier type="ZBK">6A0BCD992749450C874B440D0C0A232C</mods:identifier>
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<mods:identifier type="ZooBank">6A0BCD992749450C874B440D0C0A232C</mods:identifier>
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</mods:mods>
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<treatment ID-GBIF-Taxon="135489988" LSID="urn:lsid:zoobank.org:act:66E692B5-7C61-4ADC-9539-EFC085424147" httpUri="http://treatment.plazi.org/id/CC5F0ABB15F6989E849383880CD39530" lastPageId="8" lastPageNumber="9" pageId="7" pageNumber="8">
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<subSubSection pageId="7" pageNumber="8" type="nomenclature">
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<paragraph pageId="7" pageNumber="8">
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<taxonomicName LSID="http://zoobank.org/66E692B5-7C61-4ADC-9539-EFC085424147" authority="Taylor & Wiklund" class="Bivalvia" family="Nuculanidae" genus="Ledella" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Ledella knudseni" order="Pholadomyoida" pageId="7" pageNumber="8" phylum="Mollusca" rank="species" species="knudseni">Ledella knudseni Taylor & Wiklund</taxonomicName>
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<taxonomicNameLabel pageId="7" pageNumber="8">sp. n.</taxonomicNameLabel>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="7" pageNumber="8" type="materials_examined">
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<paragraph pageId="7" pageNumber="8">Material examined.</paragraph>
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<paragraph pageId="7" pageNumber="8">Paratype NHM_288A NHMUK 20170047.1-2, collected 2013-10-17, 13.75583 -116.48667, 4076 m. http://data.nhm.ac.uk/object/8aec47f4-dcec-4668-8398-9e4b0c28ecb8</paragraph>
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<paragraph pageId="7" pageNumber="8">Holotype NHM_288C NHMUK 20170048, collected 2013-10-17, 13.75583 -116.48667, 4076 m. http://data.nhm.ac.uk/object/f1886d78-22bf-403e-bdb2-784b91c0eb12</paragraph>
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</subSubSection>
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<subSubSection lastPageId="8" lastPageNumber="9" pageId="7" pageNumber="8" type="description">
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<paragraph pageId="7" pageNumber="8">Description.</paragraph>
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<paragraph lastPageId="8" lastPageNumber="9" pageId="7" pageNumber="8">
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Shell relatively thick, robust. Ovoid with short rostrum, umbones broad, prominent; postero ventral margin sinuous; broad, shallow sulcus extending from umbones to posteroventral margin. Sculpture of low, relatively broad, closely
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<pageBreakToken pageId="8" pageNumber="9" start="start">spaced</pageBreakToken>
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, commarginal lamellae; fine radial striations on rostrum and juvenile shell. Ligament internal, situated on broad resilium beneath umbones. Hinge robust, with 8-9 chevron shaped, blunt teeth to either side of ligament. Inner shell margin smooth. Prodissoconch large, ellipsoidal 0.3 mm long, with sharp rim, surface irregularly pitted. Holotype NHM_288C shell length 2.2 mm, width 1.5 mm; paratype NHM_288A shell length 2.1 mm, height 1.5 mm. (Figure 7).
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</paragraph>
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<caption pageId="8" pageNumber="9">
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<paragraph pageId="8" pageNumber="9">
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Figure 7.
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<taxonomicName class="Bivalvia" family="Nuculanidae" genus="Ledella" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Ledella knudseni" order="Nuculanida" pageId="8" pageNumber="9" phylum="Mollusca" rank="species" species="knudseni">Ledella knudseni</taxonomicName>
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sp. n. A Holotype, specimen NHM_288c B Paratype, specimen NHM_288a C Specimen NHM 288a dissected prior to DNA sequencing and SEM
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<normalizedToken originalValue="D–G">D-G</normalizedToken>
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SEM of valve, hinge teeth and protoconch. Scale bars: 1 mm (
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<normalizedToken originalValue="B–C">B-C</normalizedToken>
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); 0.5 mm (
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<normalizedToken originalValue="D–E">D-E</normalizedToken>
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); 0.1 mm (
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<normalizedToken originalValue="F–G">F-G</normalizedToken>
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). Image attribution Glover, Taylor, Dahlgren & Wiklund, 2017.
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection pageId="8" pageNumber="9" type="genetic data">
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<paragraph pageId="8" pageNumber="9">Genetic data.</paragraph>
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<paragraph pageId="8" pageNumber="9">GenBank NHM_288A COI-MF157515; NHM_288C 18S-MF157491, COI-MF157516.</paragraph>
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</subSubSection>
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<subSubSection pageId="8" pageNumber="9" type="remarks">
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<paragraph pageId="8" pageNumber="9">Remarks.</paragraph>
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<paragraph pageId="8" pageNumber="9">
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Similar in form to
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<taxonomicName class="Bivalvia" family="Nuculanidae" genus="Ledella" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Ledella ultima" order="Nuculanida" pageId="8" pageNumber="9" phylum="Mollusca" rank="species" species="ultima">Ledella ultima</taxonomicName>
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(Smith, 1885) widespread in the abyssal Atlantic (
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<bibRefCitation author="Allen, JA" journalOrPublisher="Malacologia" pageId="29" pageNumber="30" pagination="57 - 103" title="Bivalvia of the deep Atlantic." url="https://doi.org/10.4002/0076-2997-50.1.57" volume="50" year="2008">Allen 2008</bibRefCitation>
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), but has a less massive hinge with more teeth, 8-9 compared with 6-8 in
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<taxonomicName lsidName="L. ultima" pageId="8" pageNumber="9" rank="species" species="ultima">L. ultima</taxonomicName>
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. Also similar is the species identified by
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<bibRefCitation author="Knudsen, J" journalOrPublisher="Galathea Reports" pageId="30" pageNumber="31" pagination="1 - 241" title="The systematics and biology of abyssal and hadal Bivalvia." volume="11" year="1970">Knudsen (1970)</bibRefCitation>
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as
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<taxonomicName lsidName="L. ultima" pageId="8" pageNumber="9" rank="species" species="ultima">L. ultima</taxonomicName>
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from the Sunda Trench in Indian Ocean at 3810 m. The only species recorded from the deep eastern Pacific is
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<taxonomicName class="Bivalvia" family="Nuculanidae" genus="Ledella" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Ledella dicella" order="Nuculanida" pageId="8" pageNumber="9" phylum="Mollusca" rank="species" species="dicella">Ledella dicella</taxonomicName>
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(Dall, 1908) from 734-1200 m off Ecuador but this lacks the short rostrum and has 12-13 hinge teeth on each side of the ligament (
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<bibRefCitation author="Coan, EV" journalOrPublisher="Santa Barbara Museum of Natural History Monographs" pageId="29" pageNumber="30" pagination="1 - 1258" title="Bivalve seashells of tropical west America: Marine bivalves from Baja California to northern Peru." volume="6" year="2012">Coan and Valentich-Scott 2012</bibRefCitation>
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pl. 26). No genetic matches on GenBank.
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<taxonomicName class="Bivalvia" family="Nuculanidae" genus="Ledella" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Ledella knudseni" order="Nuculanida" pageId="8" pageNumber="9" phylum="Mollusca" rank="species" species="knudseni">Ledella knudseni</taxonomicName>
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groups in a small subclade with but is distinct from the Atlantic species
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<taxonomicName lsidName="L. ultima" pageId="8" pageNumber="9" rank="species" species="ultima">L. ultima</taxonomicName>
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and
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<taxonomicName class="Bivalvia" family="Nuculanidae" genus="Ledella" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Ledella jamesi" order="Nuculanida" pageId="8" pageNumber="9" phylum="Mollusca" rank="species" species="jamesi">Ledella jamesi</taxonomicName>
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Allen & Hannah, 1989, as well as another
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<taxonomicName class="Bivalvia" family="Nuculanidae" genus="Ledella" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Ledella" order="Nuculanida" pageId="8" pageNumber="9" phylum="Mollusca" rank="genus">Ledella</taxonomicName>
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species from this study in the Pacific,
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<taxonomicName class="Bivalvia" family="Nuculanidae" genus="Ledella" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Ledella" order="Nuculanida" pageId="8" pageNumber="9" phylum="Mollusca" rank="genus">Ledella</taxonomicName>
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sp. (NHM_381) (Figure 12). The new species can be confused with juveniles of
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<taxonomicName lsidName="B. calcar" pageId="8" pageNumber="9" rank="species" species="calcar">B. calcar</taxonomicName>
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(see above), but shell is less shiny and iridescent, and ribs are more pronounced. DNA may be required to confirm identification.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="8" pageNumber="9" type="etymology">
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<paragraph pageId="8" pageNumber="9">Etymology.</paragraph>
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<paragraph pageId="8" pageNumber="9">
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Named for
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<normalizedToken originalValue="Jørgen">Jorgen</normalizedToken>
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Knudsen (1918-2009), deep-sea bivalve systematist and author of the Galathea Report on abyssal and hadal
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<taxonomicName class="Bivalvia" lsidName="Protobranchia" pageId="8" pageNumber="9" rank="class">Bivalvia</taxonomicName>
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.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="8" pageNumber="9" type="ecology">
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<paragraph pageId="8" pageNumber="9">Ecology.</paragraph>
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<paragraph pageId="8" pageNumber="9">Found in polymetallic nodule province.</paragraph>
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</subSubSection>
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</treatment>
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</document> |