343 lines
36 KiB
XML
343 lines
36 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/zookeys.838.28634" ID-GBIF-Dataset="bb090e6f-ea24-4d78-a099-65d03e631a9c" ID-PMC="PMC6477812" ID-Pensoft-Pub="1313-2970-838-71" ID-PubMed="31048969" ID-ZBK="1BA607CBA5224600AF5F068461B24E0E" ModsDocAuthor="" ModsDocDate="2019" ModsDocID="1313-2970-838-71" ModsDocOrigin="ZooKeys 838" ModsDocTitle="A new species of Pista Malmgren, 1866 (Polychaeta, Terebellidae) from the north-western Mediterranean Sea" checkinTime="1555318511036" checkinUser="pensoft" docAuthor="Labrune, Celine, Lavesque, Nicolas, Bonifacio, Paulo & Hutchings, Pat" docDate="2019" docId="7D36D500F8BD7405E8D00264E22348D4" docLanguage="en" docName="ZooKeys 838: 71-84" docOrigin="ZooKeys 838" docSource="http://dx.doi.org/10.3897/zookeys.838.28634" docTitle="Pista colini Labrune, Lavesque, Bonifacio & Hutchings, 2019, sp. n." docType="treatment" docUuid="0532761D-4534-4C83-8D56-D7683468160B" docUuidSource="ZooBank" docVersion="5" lastPageNumber="79" masterDocId="FFBCFFA4DA2BFFB33C4B2749FFAB4249" masterDocTitle="A new species of Pista Malmgren, 1866 (Polychaeta, Terebellidae) from the north-western Mediterranean Sea" masterLastPageNumber="84" masterPageNumber="71" pageNumber="74" updateTime="1668167152069" updateUser="ExternalLinkService">
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<mods:titleInfo>
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<mods:title>A new species of Pista Malmgren, 1866 (Polychaeta, Terebellidae) from the north-western Mediterranean Sea</mods:title>
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</mods:titleInfo>
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<mods:name type="personal">
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Labrune, Celine</mods:namePart>
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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:namePart>Lavesque, Nicolas</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:namePart>Bonifacio, Paulo</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:namePart>Hutchings, Pat</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>2019</mods:date>
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<mods:detail type="volume">
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<mods:number>838</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>71</mods:start>
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<mods:end>84</mods:end>
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<mods:url>http://dx.doi.org/10.3897/zookeys.838.28634</mods:url>
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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.838.28634</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1313-2970-838-71</mods:identifier>
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<mods:identifier type="ZBK">1BA607CBA5224600AF5F068461B24E0E</mods:identifier>
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<mods:identifier type="ZooBank">1BA607CBA5224600AF5F068461B24E0E</mods:identifier>
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<treatment ID-GBIF-Taxon="156200618" LSID="urn:lsid:zoobank.org:act:0532761D-4534-4C83-8D56-D7683468160B" httpUri="http://treatment.plazi.org/id/7D36D500F8BD7405E8D00264E22348D4" lastPageId="8" lastPageNumber="79" pageId="3" pageNumber="74">
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<subSubSection pageId="3" pageNumber="74" type="nomenclature">
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<paragraph pageId="3" pageNumber="74">
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<taxonomicName LSID="http://zoobank.org/0532761D-4534-4C83-8D56-D7683468160B" class="Polychaeta" family="Terebellidae" genus="Pista" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pista colini" order="Terebellida" pageId="3" pageNumber="74" phylum="Annelida" rank="species" species="colini">Pista colini</taxonomicName>
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<taxonomicNameLabel pageId="3" pageNumber="74">sp. n.</taxonomicNameLabel>
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Figs 2, 3, 4
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</paragraph>
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</subSubSection>
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<subSubSection lastPageId="4" lastPageNumber="75" pageId="3" pageNumber="74" type="materials_examined">
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<paragraph pageId="3" pageNumber="74">Material examined.</paragraph>
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<paragraph pageId="3" pageNumber="74">
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Type material. Banyuls-sur-Mer harbour, Gulf of Lion, Mediterranean Sea, France (
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<geoCoordinate direction="north" orientation="latitude" precision="1" value="42.481117">42°28.867'N</geoCoordinate>
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,
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<geoCoordinate direction="east" orientation="longitude" precision="1" value="3.1359">3°08.154'E</geoCoordinate>
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, 3 m depth), subtidal in gravely sands, all collected 16 July 2012 except MNHN-IA-TYPE 1853 collected 12 July 2017. Holotype: MNHN-IA-TYPE 1850, complete, 70 segments, total length 17.6 mm, thoracic length 4.8 mm, anterior width 0.6 mm, Paratypes: AM W.50625, 1 specimen, posteriorly incomplete, total length 11 mm, thoracic length 7 mm, anterior width 1.0 mm; AM W.50626, 3 specimens plus 1 posterior fragment 5 mm with pygidium, 1 complete, total length 11 mm, thoracic length 5 mm, anterior width 0.5 mm, 1 complete, total length 12 mm, thoracic length 5 mm, anterior width 0.5 mm, 1 posteriorly incomplete, length 16 mm, thoracic length 8 mm, anterior width 0.8 mm, 2 specimens mounted for SEM. MNHN-IA-TYPE 1851, 1 specimen, posteriorly incomplete, total length 14.3 mm, thoracic length 3.7 mm, anterior width 0.7 mm; MNHN-IA-TYPE 1852, complete specimen, total length 9.70 mm, thoracic length 4.6 mm, anterior width 0.9 mm; MNHN-IA-TYPE 1853, complete collected 12 July 2017, thoracic length 4.4 mm, anterior width 1.1 mm, posterior part cut for molecular analysis; MNHN-IA-TYPE 1854, complete length 18.2 mm, anterior width 0.7 mm, mounted for SEM; MNHN-IA-TYPE 1855, complete, 1 specimen, total length 9.0 mm, thoracic length 3.1 mm, anterior width 0.7 mm.
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</paragraph>
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<paragraph pageId="3" pageNumber="74">
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Additional material. Banyuls-sur-Mer harbour, Gulf of Lion, Mediterranean Sea, France (
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<geoCoordinate direction="north" orientation="latitude" precision="1" value="42.481117">42°28.867'N</geoCoordinate>
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,
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<geoCoordinate direction="east" orientation="longitude" precision="1" value="3.1359">3°08.154'E</geoCoordinate>
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, 3 m depth), subtidal in gravely sands, all collected 16 July 2012. BAN.Pista.08, 1 specimen, complete, total length 10.0 mm, thoracic length 3.7 mm, anterior width 0.8 mm; BAN.Pista.09, 1 specimen gravid, posteriorly incomplete, thoracic length 5.1 mm, anterior width 0.7 mm; BAN.Pista.10, complete, 1 specimen, total length 22.7 mm, thoracic length 7.8 mm, anterior width 0.9 mm; BAN.Pista.12, complete, 1 specimen, total length 12.4 mm, thoracic length 4.6 mm, anterior width 0.6 mm.
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</paragraph>
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<paragraph pageId="4" pageNumber="75">
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<pageBreakToken pageId="4" pageNumber="75" start="start">Comparative</pageBreakToken>
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material.
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<taxonomicName class="Polychaeta" family="Terebellidae" genus="Pista" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pista bansei" order="Terebellida" pageId="4" pageNumber="75" phylum="Annelida" rank="species" species="bansei">Pista bansei</taxonomicName>
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Saphronova, 1988 Holotype reg. # 47667,
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<geoCoordinate direction="north" orientation="latitude" precision="925" value="47.683334">47°41'N</geoCoordinate>
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,
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<geoCoordinate direction="east" orientation="longitude" precision="92" value="139.56833">139°34.1'E</geoCoordinate>
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, Sea of Japan, Tartary Strait, off Nelma, 105 m; 4 paratypes reg. # 47668 according to
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<bibRefCitation author="Saphronova, MA" journalOrPublisher="Zoologicheskii zhurnal" pageId="10" pageNumber="81" pagination="888 - 897" title="On Cosmopolitan Distribution of Pistacristata (Polychaeta, Terebellidae)." volume="67" year="1988">Saphronova 1988</bibRefCitation>
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(but reg. # 32423 according to label in the museum vial) from same station, deposited in Zoological Museum of Russian Academy of Sciences in St Petersburg.
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</paragraph>
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<paragraph pageId="4" pageNumber="75">
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Additional material from R/V
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<normalizedToken originalValue="“Vityaz”">"Vityaz"</normalizedToken>
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stations 59, 119, 1587a, 3350, 3569, 1086. (For locality details see
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<bibRefCitation author="Saphronova, MA" journalOrPublisher="Zoologicheskii zhurnal" pageId="10" pageNumber="81" pagination="888 - 897" title="On Cosmopolitan Distribution of Pistacristata (Polychaeta, Terebellidae)." volume="67" year="1988">Saphronova (1988</bibRefCitation>
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: table 1, no museum registration numbers allocated) deposited in the Zoological Museum of Moscow State University.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="4" pageNumber="75" type="description">
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<paragraph pageId="4" pageNumber="75">Description</paragraph>
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<paragraph pageId="4" pageNumber="75">(based on holotype). Holotype is a complete specimen, 17.5 mm in length, 0.6 mm in width at segment X and with 70 segments (Fig. 2A, B).</paragraph>
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<caption pageId="4" pageNumber="75">
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<paragraph pageId="4" pageNumber="75">
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Figure 2.
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<taxonomicName class="Polychaeta" family="Terebellidae" genus="Pista" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pista colini" order="Terebellida" pageId="4" pageNumber="75" phylum="Annelida" rank="species" species="colini">Pista colini</taxonomicName>
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sp. n.: A Live specimen, dorsal view B Entire specimen, ventral view, methyl green staining C Anterior part, ventral view D Anterior part, dorsal view.
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<normalizedToken originalValue="B–D">B-D</normalizedToken>
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from holotype MNHN-IA-TYPE 1850. Key: LL: lateral lobes, bs: branchial stalks.
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</paragraph>
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</caption>
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<paragraph pageId="4" pageNumber="75">
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Transverse prostomium attached to dorsal surface of upper lip. Buccal tentacles all of similar width inserted ventrally on prostomium, shorter than smallest branchia; long tentacles situated centrally in dorsal region, longer than largest branchia (Fig. 2C). Peristomium consisting of large rounded upper lip, forming a swollen cushion with one small fold on each side. Lower lip short, irregularly swollen (Fig. 3C). Segment I reduced, V-shaped, situated medio-ventrally (Fig. 3C), without lateral lobes. Segment II with well-developed lateral lobes, with anterior margins rounded merging with ventral pad to form a continuous minutely crenulated ventral collar. One pair of unequal-sized plumose branchiae inserted one just next to the other on segment II; all filaments strongly ciliated (Figs 2D, 3D), arranged in spiral around central axis with dichotomous filaments. Both stalks markedly wrinkled (Fig. 3A, B). Segment III with lateral lobes half width of segment, asymmetrical and slightly displaced dorsally, connected across ventrum (Fig. 3
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<normalizedToken originalValue="A–C">A-C</normalizedToken>
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). Segment IV lacking lateral lobes (Fig. 3A, B).
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</paragraph>
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<caption pageId="4" pageNumber="75">
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<paragraph pageId="4" pageNumber="75">
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Figure 3.
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<taxonomicName class="Polychaeta" family="Terebellidae" genus="Pista" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pista colini" order="Terebellida" pageId="4" pageNumber="75" phylum="Annelida" rank="species" species="colini">Pista colini</taxonomicName>
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sp. n., SEM images: A Anterior part, dorso-lateral view B Anterior part, lateral view C Anterior part, ventral view D Branchial filaments A from paratype MNHN-IA-TYPE 1854
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<normalizedToken originalValue="B–D">B-D</normalizedToken>
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from paratype AM W.50626. Key: LL: lateral lobes, bs: branchial stalks, ll: lower lip, SI, SII, and SIII: Segments I, II, and III.
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</paragraph>
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</caption>
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<paragraph pageId="4" pageNumber="75">
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Notochaetae, broad-winged capillaries, with fine tips (Fig. 4A). Neuropodia from segment V (chaetiger 2), initially arranged in single rows, from segments XI to XX arranged in completely intercalated double rows face-to-face and then reverting to single rows on abdomen. Neurochaetae as long-handled avicular uncini on segments V and VI (Fig. 4B) then short-handled. Neuropodia with ca. 14 uncini (arranged in single row), thoracic uncini with dental formula MF: 3
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<normalizedToken originalValue="–4:5–">-4:5-</normalizedToken>
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6:α (Fig. 4
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<normalizedToken originalValue="D–E">D-E</normalizedToken>
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). Abdominal neuropodia becoming more erect posteriorly with ca. 12 uncini each, elongate extending from torus, dental formula MF: 6
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<normalizedToken originalValue="–7:6–">-7:6-</normalizedToken>
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7:
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<normalizedToken originalValue="α">α</normalizedToken>
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:
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<normalizedToken originalValue="α">α</normalizedToken>
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(Fig. 4C, F). Nephridial papillae on segments VI and VII (chaetigers 3 and 4), inserted posteriorly/laterally to notopodia, small spherical.
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</paragraph>
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<caption pageId="4" pageNumber="75">
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<paragraph pageId="4" pageNumber="75">
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Figure 4.
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<taxonomicName class="Polychaeta" family="Terebellidae" genus="Pista" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pista colini" order="Terebellida" pageId="4" pageNumber="75" phylum="Annelida" rank="species" species="colini">Pista colini</taxonomicName>
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sp. n.: A Thoracic notochaeta of segment VI B Thoracic uncini of segment V C Abdominal uncini D Thoracic uncini in single row E Thoracic uncini in double row F Abdominal uncini A from paratype MNHN-IA-TYPE 1853 B, C from additional material BAN.Pista.12 D from paratype AM W.50626 (SEM image) E, F from paratype MNHN-IA-TYPE 1854 (SEM images). Key: Lh: long-handled uncinus, bh: broken-handled uncinus.
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</paragraph>
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</caption>
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<paragraph pageId="4" pageNumber="75">Pygidium with slightly crenulated margins (hardly visible even under stereomicroscope but clearly visible under SEM).</paragraph>
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</subSubSection>
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<subSubSection pageId="4" pageNumber="75" type="methyl green staining pattern">
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<paragraph pageId="4" pageNumber="75">Methyl green staining pattern.</paragraph>
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<paragraph pageId="4" pageNumber="75">Branchiae, lips and base of tentacles not stained. Extremity of tentacles staining and retained as blue/brown even after being washed in ethanol for some days (Fig. 2B, C). Thorax until segment XX, strongly staining ventrally, moderately laterally and poorly dorsally. Ventral stain on all shields, anterior half of each shield staining deeply, posterior part not staining (Fig. 2B, C). Anterior abdomen not coloured and posterior abdomen staining ventrally and dorsally with anterior half of each segment staining deeply, posterior part not staining; increasing colouration towards pygidium (Fig. 2B).</paragraph>
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</subSubSection>
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<subSubSection lastPageId="6" lastPageNumber="77" pageId="5" pageNumber="76" type="morphological variation">
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<paragraph pageId="5" pageNumber="76">
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<pageBreakToken pageId="5" pageNumber="76" start="start">Morphological</pageBreakToken>
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variation.
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</paragraph>
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<paragraph lastPageId="6" lastPageNumber="77" pageId="5" pageNumber="76">
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Complete individuals ranging from 9.0 to 22.7 mm in length, 0.5 to 1.1 mm in width at segment X and between 59 to 72 segments. Thoracic lengths vary between 3.1 and 7.8 mm. One gravid specimen was found (BAN.Pista.09). It was incomplete, but thoracic length was 5.1 mm and anterior width 0.7 mm. These measurements correspond to a small size species. Live specimens pinkish with translucent buccal tentacles; ventral shields divided in two parts, anterior part pinkish, posterior part blood red (Fig. 2A). Preserved specimens pinkish with ventral shields divided transversally in two parts. Crenulation of ventral collar of segment II is difficult to see under the binocular and not always visible under SEM. It probably depends on the contraction of the animal. All specimens, regardless of size, with a single pair of branchiae, one up to twice as long as the other (Fig. 2D). Eleven of the twenty observed specimens had the long branchiae on the right side. Number of anterior
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<pageBreakToken pageId="6" pageNumber="77" start="start">thoracic</pageBreakToken>
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uncinigers with long-handled uncini is variable (from 2 to 9). This difference seems to not be dependent upon size. Nephridial papillae not always visible.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="6" pageNumber="77" type="etymology">
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<paragraph pageId="6" pageNumber="77">Etymology.</paragraph>
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<paragraph pageId="6" pageNumber="77">The name of species is dedicated to the nephew of the first author Colin Labrune who is already a little budding naturalist.</paragraph>
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</subSubSection>
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<subSubSection pageId="6" pageNumber="77" type="type locality">
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<paragraph pageId="6" pageNumber="77">Type locality.</paragraph>
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<paragraph pageId="6" pageNumber="77">Only known from Banyuls-sur-Mer harbour, France (Mediterranean Sea).</paragraph>
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</subSubSection>
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<subSubSection lastPageId="7" lastPageNumber="78" pageId="6" pageNumber="77" type="ecological notes">
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<paragraph pageId="6" pageNumber="77">Ecological notes.</paragraph>
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<paragraph lastPageId="7" lastPageNumber="78" pageId="6" pageNumber="77">
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<taxonomicName class="Polychaeta" family="Terebellidae" genus="Pista" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pista colini" order="Terebellida" pageId="6" pageNumber="77" phylum="Annelida" rank="species" species="colini">Pista colini</taxonomicName>
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sp. n. was sampled at 3 m depth on gravelly sand recently deposited manually in Banyuls-sur-Mer harbour. It was found in very high densities (446 ind. m-2 in April 2012 and 1176 ind. m-2 in July 2012) a few weeks after the sediments had been deposited. We sampled again in November 2012 but there was no more gravel and
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<taxonomicName class="Polychaeta" family="Terebellidae" genus="Pista" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pista colini" order="Terebellida" pageId="6" pageNumber="77" phylum="Annelida" rank="species" species="colini">Pista colini</taxonomicName>
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sp. n. was absent. The species is not found in the harbour if no gravel deposits are present. In the undisturbed part of the harbour, median granulometry was ca. 50
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<normalizedToken originalValue="µm">µm</normalizedToken>
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while the median granulometry of the gravelly sand in which this species is found was ca. 800
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<normalizedToken originalValue="µm">µm</normalizedToken>
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. In July 2017, we sampled a week after another fresh load of sediment with gravel had been deposited and we found high
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<pageBreakToken pageId="7" pageNumber="78" start="start">densities</pageBreakToken>
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of
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<taxonomicName class="Polychaeta" family="Terebellidae" genus="Pista" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pista colini" order="Terebellida" pageId="7" pageNumber="78" phylum="Annelida" rank="species" species="colini">Pista colini</taxonomicName>
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sp. n. living in tubes made from heterogeneous sediment agglomerated with mucus.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="7" pageNumber="78" type="genetic data">
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<paragraph pageId="7" pageNumber="78">Genetic data.</paragraph>
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<paragraph pageId="7" pageNumber="78">The COI gene was successfully sequenced and published at NCBI GenBank for paratype MNHN-IA-TYPE 1853 with accession number MK584933.</paragraph>
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</subSubSection>
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<subSubSection lastPageId="8" lastPageNumber="79" pageId="7" pageNumber="78" type="remarks">
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<paragraph pageId="7" pageNumber="78">Remarks and discussion.</paragraph>
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<paragraph pageId="7" pageNumber="78">
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The presence of a single pair of branchiae is a stable character in
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<taxonomicName class="Polychaeta" family="Terebellidae" genus="Pista" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pista colini" order="Terebellida" pageId="7" pageNumber="78" phylum="Annelida" rank="species" species="colini">Pista colini</taxonomicName>
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sp. n. More than 100 specimens were observed, of different sizes and all of them had a single pair of branchiae, some were also observed alive. Our observations support
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<bibRefCitation pageId="7" pageNumber="78">Hutchings et al. (2017)</bibRefCitation>
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but are not in agreement with
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<bibRefCitation pageId="7" pageNumber="78">Saphronova and Jirkov (2001)</bibRefCitation>
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, who hypothesised that this character is size-related. A detailed morphological and molecular study needs to be performed in order to investigate this hypothesis across a range of species with varying number of pairs of branchiae.
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</paragraph>
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<paragraph pageId="7" pageNumber="78">
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Although
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<bibRefCitation pageId="7" pageNumber="78">Gil (2011)</bibRefCitation>
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mentioned
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<taxonomicName class="Polychaeta" family="Terebellidae" genus="Pista" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pista cristata" order="Terebellida" pageId="7" pageNumber="78" phylum="Annelida" rank="species" species="cristata">Pista cristata</taxonomicName>
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as having only one pair of branchiae, based on
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<bibRefCitation author="Saphronova, MA" journalOrPublisher="Zoologicheskii zhurnal" pageId="10" pageNumber="81" pagination="888 - 897" title="On Cosmopolitan Distribution of Pistacristata (Polychaeta, Terebellidae)." volume="67" year="1988">Saphronova (1988)</bibRefCitation>
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, we considered that this species has two pairs of branchiae. The absence of consensus on this species does not have any consequence for this new species which always had some long-handled thoracic uncini, whereas
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<bibRefCitation pageId="7" pageNumber="78">Gil (2011)</bibRefCitation>
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records
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<taxonomicName lsidName="P. cristata" pageId="7" pageNumber="78" rank="species" species="cristata">P. cristata</taxonomicName>
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as lacking such long-handled even on large specimens. Among the seven species with a single pair of branchiae, there is no possible confusion of
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<taxonomicName lsidName="P. colini" pageId="7" pageNumber="78" rank="species" species="colini">P. colini</taxonomicName>
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sp. n. with
|
||
<taxonomicName class="Polychaeta" family="Terebellidae" genus="Pista" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pista mirabilis" order="Terebellida" pageId="7" pageNumber="78" phylum="Annelida" rank="species" species="mirabilis">Pista mirabilis</taxonomicName>
|
||
and with
|
||
<taxonomicName lsidName="P. spinifera" pageId="7" pageNumber="78" rank="species" species="spinifera">P. spinifera</taxonomicName>
|
||
as both lack plumose branchiae.
|
||
<taxonomicName class="Polychaeta" family="Terebellidae" genus="Pista" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pista colini" order="Terebellida" pageId="7" pageNumber="78" phylum="Annelida" rank="species" species="colini">Pista colini</taxonomicName>
|
||
sp. n. is close to
|
||
<taxonomicName lsidName="P. adriatica" pageId="7" pageNumber="78" rank="species" species="adriatica">P. adriatica</taxonomicName>
|
||
sharing the following characters: one pair of unequal sized plumose branchiae on segment II and presence of lateral lobes on segments II and III, lacking on segment IV. However, segment II of
|
||
<taxonomicName lsidName="P. adriatica" pageId="7" pageNumber="78" rank="species" species="adriatica">P. adriatica</taxonomicName>
|
||
presents narrow lateral lobes while in
|
||
<taxonomicName lsidName="P. colini" pageId="7" pageNumber="78" rank="species" species="colini">P. colini</taxonomicName>
|
||
sp. n. these lateral lobes are well developed. Lateral lobes of segment III are rectangular in
|
||
<taxonomicName lsidName="P. adriatica" pageId="7" pageNumber="78" rank="species" species="adriatica">P. adriatica</taxonomicName>
|
||
rather than being asymmetrical and slightly displaced dorsally as in
|
||
<taxonomicName lsidName="P. colini" pageId="7" pageNumber="78" rank="species" species="colini">P. colini</taxonomicName>
|
||
sp. n. Furthermore
|
||
<taxonomicName lsidName="P. colini" pageId="7" pageNumber="78" rank="species" species="colini">P. colini</taxonomicName>
|
||
sp. n. can be differentiated by the absence of glandular ridges on segments II and III, which are present in
|
||
<taxonomicName lsidName="P. adriatica" pageId="7" pageNumber="78" rank="species" species="adriatica">P. adriatica</taxonomicName>
|
||
. According to
|
||
<bibRefCitation author="Mikac, B" journalOrPublisher="Journal of the Marine Biological Association of the United Kingdom" pageId="10" pageNumber="81" pagination="943 - 953" title="One new species of Pista Malmgren, 1866 (Annelida: Terebellidae) and one new species of Pistella Hartmann-Schroeder, 1996 (Annelida: Terebellidae) from the Adriatic Sea (Mediterranean)." url="https://doi.org/10.1017/S0025315417000868" volume="97" year="2017">Mikac and Hutchings (2017)</bibRefCitation>
|
||
,
|
||
<taxonomicName lsidName="P. godfroyi" pageId="7" pageNumber="78" rank="species" species="godfroyi">P. godfroyi</taxonomicName>
|
||
and
|
||
<taxonomicName lsidName="P. dibranchis" pageId="7" pageNumber="78" rank="species" species="dibranchis">P. dibranchis</taxonomicName>
|
||
which also have a single pair of branchiae, should be transferred to
|
||
<taxonomicName class="Polychaeta" family="Terebellidae" genus="Pistella" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pistella" order="Terebellida" pageId="7" pageNumber="78" phylum="Annelida" rank="genus">Pistella</taxonomicName>
|
||
<bibRefCitation author="Hartmann-Schroeder, G" journalOrPublisher="Gustav Fischer, Jena" pageId="9" pageNumber="80" title="Annelida, Borstenwuermer, Polychaeta (Annelida, bristleworms, Polychaeta), 2 nd revised edition. The fauna of Germany and adjacent seas with their characteristics and ecology, 58." year="1996">
|
||
<normalizedToken originalValue="Hartmann-Schröder">Hartmann-Schroeder</normalizedToken>
|
||
1996
|
||
</bibRefCitation>
|
||
because they lack long-handled uncini. Therefore, they cannot be confused with
|
||
<taxonomicName lsidName="P. colini" pageId="7" pageNumber="78" rank="species" species="colini">P. colini</taxonomicName>
|
||
sp. n. The lack of long-handled uncini is also the case for
|
||
<taxonomicName class="Polychaeta" family="Terebellidae" genus="Pista" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pista lornensis." order="Terebellida" pageId="7" pageNumber="78" phylum="Annelida" rank="species" species="lornensis.">Pista lornensis.</taxonomicName>
|
||
Furthermore, when first describing
|
||
<taxonomicName class="Polychaeta" family="Terebellidae" genus="Pista" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pista lornensis" order="Terebellida" pageId="7" pageNumber="78" phylum="Annelida" rank="species" species="lornensis">Pista lornensis</taxonomicName>
|
||
,
|
||
<bibRefCitation author="Pearson, TH" journalOrPublisher="Journal of Natural History" pageId="10" pageNumber="81" pagination="509 - 516" title="Scionellalornensis sp. nov., a new terebellid (Polychaeta: Annelida) from the west coast of Scotland, with notes on the genus Scionella Moore, and a key to the genera of the Terebellidae recorded from European waters." url="https://doi.org/10.1080/00222936900770441" volume="3" year="1969">Pearson (1969)</bibRefCitation>
|
||
reported two obvious ligaments, one attached below the rostrum and the largest to the posterior basal corner of the uncini. These filaments are not present in
|
||
<taxonomicName lsidName="P. colini" pageId="7" pageNumber="78" rank="species" species="colini">P. colini</taxonomicName>
|
||
sp. n.
|
||
</paragraph>
|
||
<paragraph lastPageId="8" lastPageNumber="79" pageId="7" pageNumber="78">
|
||
According to
|
||
<bibRefCitation pageId="7" pageNumber="78">Gil (2011)</bibRefCitation>
|
||
,
|
||
<taxonomicName class="Polychaeta" family="Terebellidae" genus="Pista" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pista bansei" order="Terebellida" pageId="7" pageNumber="78" phylum="Annelida" rank="species" species="bansei">Pista bansei</taxonomicName>
|
||
is the only
|
||
<taxonomicName class="Polychaeta" family="Terebellidae" genus="Pista" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pista" order="Terebellida" pageId="7" pageNumber="78" phylum="Annelida" rank="genus">Pista</taxonomicName>
|
||
species in Europe to present one pair of "pompom like" branchiae and anterior long-handled uncini. The original description by
|
||
<bibRefCitation author="Saphronova, MA" journalOrPublisher="Zoologicheskii zhurnal" pageId="10" pageNumber="81" pagination="888 - 897" title="On Cosmopolitan Distribution of Pistacristata (Polychaeta, Terebellidae)." volume="67" year="1988">Saphronova (1988)</bibRefCitation>
|
||
is based on an incomplete holotype with 16 segments, 3.2 mm wide collected at 105 m in Strait of Tartar, the Sea of Japan, north-western Pacific Ocean, and four damaged paratypes from the same locality. She also designated another eight paratypes (R/V
|
||
<normalizedToken originalValue="“Vityaz”">"Vityaz"</normalizedToken>
|
||
St 1576,
|
||
<geoCoordinate direction="north" orientation="latitude" precision="925" value="60.05">60°03'N</geoCoordinate>
|
||
,
|
||
<geoCoordinate direction="east" orientation="longitude" precision="925" value="168.76666">168°46'E</geoCoordinate>
|
||
, 230 m, Olutorsky Bay, off Kamchatka Peninsula, Bering Sea, north-western Pacific Ocean) and 1 paratype (R/V
|
||
<normalizedToken originalValue="“Sevastopol”">"Sevastopol"</normalizedToken>
|
||
St 1086, 495 m,
|
||
<geoCoordinate direction="north" orientation="latitude" precision="925" value="62.933334">62°56'N</geoCoordinate>
|
||
,
|
||
<geoCoordinate direction="west" orientation="longitude" precision="925" value="-9.316667">9°19'W</geoCoordinate>
|
||
, between Iceland and Faroe Islands, North Atlantic Ocean), the material is deposited in Zoological Museum of Moscow State University. She also lists additional specimens not designated as type material from localities such as Davis Strait, Norwegian, Kara Sea (off Novaya Zemlya), White Sea in the North Atlantic, and Arctic Oceans, as well as Sea of Ja
|
||
<pageBreakToken pageId="8" pageNumber="79" start="start">pan</pageBreakToken>
|
||
, Sea of Okhotsk, and Bering Sea in the north-western Pacific Ocean in depths of 120-606 m. Such a wide distribution is highly unlikely and we suggest that
|
||
<taxonomicName lsidName="P. bansei" pageId="8" pageNumber="79" rank="species" species="bansei">P. bansei</taxonomicName>
|
||
sensu stricto is restricted to the north-western Pacific Ocean, while the rest of the material, including the one paratype from the North Atlantic Ocean represents another species, most likely part of the same species complex. Although, much of the material in Zoological Museum of Moscow State University is in poor condition, it most certainly belongs to multiple species. Therefore,
|
||
<bibRefCitation author="Saphronova, MA" journalOrPublisher="Zoologicheskii zhurnal" pageId="10" pageNumber="81" pagination="888 - 897" title="On Cosmopolitan Distribution of Pistacristata (Polychaeta, Terebellidae)." volume="67" year="1988">
|
||
<normalizedToken originalValue="Saphronova’s">Saphronova's</normalizedToken>
|
||
(1988)
|
||
</bibRefCitation>
|
||
hypothesis that only adults have anterior thoracic uncini with well-developed handles, while such handles are absent in juveniles, cannot be accepted. Furthermore, her diagrammatic illustrations indicate neither the sizes of individuals nor where the specimens were collected.
|
||
</paragraph>
|
||
<paragraph pageId="8" pageNumber="79">
|
||
All the specimens of
|
||
<taxonomicName lsidName="P. colini" pageId="8" pageNumber="79" rank="species" species="colini">P. colini</taxonomicName>
|
||
sp. n. examined here, even the smallest (59 chaetigers, thoracic width at segment X: 0.5 mm), which are comparable in size with the individuals that
|
||
<bibRefCitation author="Saphronova, MA" journalOrPublisher="Zoologicheskii zhurnal" pageId="10" pageNumber="81" pagination="888 - 897" title="On Cosmopolitan Distribution of Pistacristata (Polychaeta, Terebellidae)." volume="67" year="1988">Saphronova (1988)</bibRefCitation>
|
||
identified as juveniles (width between 0.4 and 1.15mm), had well-developed long-handled uncini, at least on chaetigers 1 and 2. Furthermore, in the original description,
|
||
<bibRefCitation author="Saphronova, MA" journalOrPublisher="Zoologicheskii zhurnal" pageId="10" pageNumber="81" pagination="888 - 897" title="On Cosmopolitan Distribution of Pistacristata (Polychaeta, Terebellidae)." volume="67" year="1988">Saphronova (1988)</bibRefCitation>
|
||
described
|
||
<taxonomicName lsidName="P. bansei" pageId="8" pageNumber="79" rank="species" species="bansei">P. bansei</taxonomicName>
|
||
with (1) an upper lip high and narrow while upper lip of
|
||
<taxonomicName lsidName="P. colini" pageId="8" pageNumber="79" rank="species" species="colini">P. colini</taxonomicName>
|
||
sp. n. is large and rounded (2) large lateral lobes, positioned vertically and connected mid ventrally by a wide fold, although the connection between the two lateral lobes in
|
||
<taxonomicName lsidName="P. colini" pageId="8" pageNumber="79" rank="species" species="colini">P. colini</taxonomicName>
|
||
sp. n. does not form a fold and does not look like the illustration in
|
||
<bibRefCitation author="Saphronova, MA" journalOrPublisher="Zoologicheskii zhurnal" pageId="10" pageNumber="81" pagination="888 - 897" title="On Cosmopolitan Distribution of Pistacristata (Polychaeta, Terebellidae)." volume="67" year="1988">Saphronova (1988</bibRefCitation>
|
||
, fig. 8
|
||
<normalizedToken originalValue="g–i">g-i</normalizedToken>
|
||
). Moreover,
|
||
<bibRefCitation pageId="8" pageNumber="79">Hilbig (2000)</bibRefCitation>
|
||
reports
|
||
<taxonomicName lsidName="P. bansei" pageId="8" pageNumber="79" rank="species" species="bansei">P. bansei</taxonomicName>
|
||
with (1) moderate numbers of tentacles, usually broken off, although all specimens of
|
||
<taxonomicName lsidName="P. colini" pageId="8" pageNumber="79" rank="species" species="colini">P. colini</taxonomicName>
|
||
sp. n. had some short and some long tentacles, rarely broken and (2) glandular ridges on segments II and III, which were not observed in
|
||
<taxonomicName lsidName="P. colini" pageId="8" pageNumber="79" rank="species" species="colini">P. colini</taxonomicName>
|
||
sp. n. Furthermore, based on the holotype 1/47667, paratypes, and several additional specimens,
|
||
<bibRefCitation author="Jirkov, IA" journalOrPublisher="Journal of the Marine Biological Association of the United Kingdom" pageId="10" pageNumber="81" pagination="911 - 934" title="Review of genera within the Axionice / Pista complex (Polychaeta, Terebellidae), with discussion of the taxonomic definition of other Terebellidae with large lateral lobes." url="https://doi.org/10.1017/S0025315417000923" volume="97" year="2017">Jirkov and Leontovich (2017)</bibRefCitation>
|
||
reported the presence of small lateral lobes on segment I in
|
||
<taxonomicName lsidName="P. bansei" pageId="8" pageNumber="79" rank="species" species="bansei">P. bansei</taxonomicName>
|
||
which are not observed in
|
||
<taxonomicName lsidName="P. colini" pageId="8" pageNumber="79" rank="species" species="colini">P. colini</taxonomicName>
|
||
sp. n. Therefore,
|
||
<taxonomicName lsidName="P. colini" pageId="8" pageNumber="79" rank="species" species="colini">P. colini</taxonomicName>
|
||
sp. n., while similar to
|
||
<taxonomicName lsidName="P. bansei" pageId="8" pageNumber="79" rank="species" species="bansei">P. bansei</taxonomicName>
|
||
in a number of characters, differs by the presence of long-handled uncini, even in the smallest specimens, and the fact that no glandular ridge was observed on segments II and III. Furthermore, the type locality of
|
||
<taxonomicName lsidName="P. bansei" pageId="8" pageNumber="79" rank="species" species="bansei">P. bansei</taxonomicName>
|
||
is from the northern Pacific in cold deeper water (105 m).
|
||
</paragraph>
|
||
<paragraph pageId="8" pageNumber="79">
|
||
Based on examination of the type material of
|
||
<bibRefCitation author="Saphronova, MA" journalOrPublisher="Zoologicheskii zhurnal" pageId="10" pageNumber="81" pagination="888 - 897" title="On Cosmopolitan Distribution of Pistacristata (Polychaeta, Terebellidae)." volume="67" year="1988">Saphronova (1988)</bibRefCitation>
|
||
in Moscow and St Petersburg museums by Hutchings in 2018 (see
|
||
<taxonomicName genus="Comparative" lsidName="Comparative" pageId="8" pageNumber="79" rank="genus">Comparative</taxonomicName>
|
||
material),
|
||
<taxonomicName class="Polychaeta" family="Terebellidae" genus="Pista" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pista bansei" order="Terebellida" pageId="8" pageNumber="79" phylum="Annelida" rank="species" species="bansei">Pista bansei</taxonomicName>
|
||
is a North Pacific species currently only known with certainty from Tartar Strait and therefore, its range cannot overlap with that of any Mediterranean species. For these reasons, we describe
|
||
<taxonomicName lsidName="P. colini" pageId="8" pageNumber="79" rank="species" species="colini">P. colini</taxonomicName>
|
||
as a new species from the Mediterranean Sea. Finally, this paper reinforces the need for a complete revision of the group of terebellids with long-handled uncini using both molecular and morphological data, especially those species with only a single pair of branchiae.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |