136 lines
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136 lines
12 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/zookeys.759.22981" ID-GBIF-Dataset="7ad14f09-86a1-4caa-8a2d-8972874e9652" ID-PMC="PMC6055549" ID-Pensoft-Pub="1313-2970-759-29" ID-PubMed="30046274" ID-ZBK="A7645CBDF29D4F99A2C5709197B95F28" ModsDocAuthor="" ModsDocDate="2018" ModsDocID="1313-2970-759-29" ModsDocOrigin="ZooKeys 759" ModsDocTitle="Three new species of Thelepus Leuckart, 1849 from Europe and a re-description of T.cincinnatus (Fabricius, 1780) (Annelida, Terebellidae)" checkinTime="1526640557497" checkinUser="pensoft" docAuthor="Jirkov, Igor" docDate="2018" docId="3790F23CE062158DC0B98D0E601FEFB0" docLanguage="en" docName="ZooKeys 759: 29-56" docOrigin="ZooKeys 759" docSource="http://dx.doi.org/10.3897/zookeys.759.22981" docTitle="Thelepus davehalli Jirkov, 2018, sp. n." docType="treatment" docUuid="7F969CCC-1770-4B35-9373-2271D9876ACC" docUuidSource="ZooBank" docVersion="5" lastPageNumber="29" masterDocId="6C25466C285AFF892121FFE9FFCD2606" masterDocTitle="Three new species of Thelepus Leuckart, 1849 from Europe and a re-description of T. cincinnatus (Fabricius, 1780) (Annelida, Terebellidae)" masterLastPageNumber="56" masterPageNumber="29" pageNumber="29" updateTime="1668165806169" 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>Three new species of Thelepus Leuckart, 1849 from Europe and a re-description of T. cincinnatus (Fabricius, 1780) (Annelida, Terebellidae)</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>Jirkov, Igor</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: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>2018</mods:date>
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<mods:detail type="volume">
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<mods:number>759</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>29</mods:start>
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<mods:end>56</mods:end>
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</mods:extent>
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</mods:part>
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</mods:relatedItem>
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<mods:location>
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<mods:url>http://dx.doi.org/10.3897/zookeys.759.22981</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.759.22981</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1313-2970-759-29</mods:identifier>
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<mods:identifier type="ZBK">A7645CBDF29D4F99A2C5709197B95F28</mods:identifier>
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<mods:identifier type="ZooBank">A7645CBDF29D4F99A2C5709197B95F28</mods:identifier>
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</mods:mods>
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<treatment ID-GBIF-Taxon="144037492" LSID="urn:lsid:zoobank.org:act:7F969CCC-1770-4B35-9373-2271D9876ACC" httpUri="http://treatment.plazi.org/id/3790F23CE062158DC0B98D0E601FEFB0" lastPageNumber="29" pageId="0" pageNumber="29">
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<subSubSection pageId="0" pageNumber="29" type="nomenclature">
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<paragraph pageId="0" pageNumber="29">
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<taxonomicName LSID="http://zoobank.org/7F969CCC-1770-4B35-9373-2271D9876ACC" class="Polychaeta" family="Terebellidae" genus="Thelepus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Thelepus davehalli" order="Terebellida" pageId="0" pageNumber="29" phylum="Annelida" rank="species" species="davehalli">Thelepus davehalli</taxonomicName>
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<taxonomicNameLabel pageId="0" pageNumber="29">sp. n.</taxonomicNameLabel>
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Figs 4, 11
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="29" type="materials_examined">
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<paragraph pageId="0" pageNumber="29">Material</paragraph>
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<paragraph pageId="0" pageNumber="29">
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(Table 1): 444 specimens from 27 stations, collected at depths from 94-495 m, 1.73 °
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<normalizedToken originalValue="C–">C-</normalizedToken>
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11.3 °C. Holotype st. Sevastopol 2587. Material is deposited at the KGB, three paratypes from Sevastopol st.1453 are deposited at the MNCN 16.01/17772. Material from Aveiro (DBUA0000389.01) and Naples (MNCN 16.01/488) is not included in the type series as it was collected too far away from the type locality, despite seeming to be morphologically identical.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="29" type="description">
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<paragraph pageId="0" pageNumber="29">Description</paragraph>
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<paragraph pageId="0" pageNumber="29">(based on holotype and paratypes). Holotype with 97 segments, 32 segments with notopodia, 95 mm length. Paratypes up to 100 mm long and 5 mm wide; number of segments increased with body size, up to 91.</paragraph>
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<paragraph pageId="0" pageNumber="29">
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Several tens of grooved buccal tentacles as long as half body length. Eyespots absent. Branchial filaments numerous, long and tangled (Fig. 4A, C). Due to tangling, it was impossible to count number of branchial filaments in large worms (>5-6 mm width) without removing them one by one. Maximum number of BS1 filaments ca. 20 (13 in holotype), extending laterally to a point level with upper edge of row of U1 uncini. BS2 with ca. ten filaments (nine in holotype). Filaments attached to a transverse elevated stump in 1-2 irregular rows but, due to numerous filaments, there appear to be more rows. Number of filaments increases with body size; small worms (1-2 mm width) with ca. 5 filaments on BS1. Lateral extension of filaments depends upon worm size: in small worms, filaments extend only to a point level with notopodia. Lateral lobes absent. Dorsum with warts or subepithelial honeycomb, forming more or less regular rows (Fig. 4A, C); number of rows increases with size of segments and worms. Segmentation distinct. Nephridial papillae on S5-S7 above neuropodia (Fig. 4C, arrowed), usually poorly visible or not visible; papillae on S4 apparently absent. Ventrum glandular, with
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<normalizedToken originalValue="“wrinkling”">"wrinkling"</normalizedToken>
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(Fig. 4B) increasing with worm size.
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</paragraph>
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<caption pageId="0" pageNumber="29">
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<paragraph pageId="0" pageNumber="29">
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Figure 4.
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<taxonomicName class="Polychaeta" family="Terebellidae" genus="Thelepus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Thelepus davehalli" order="Terebellida" pageId="0" pageNumber="29" phylum="Annelida" rank="species" species="davehalli">Thelepus davehalli</taxonomicName>
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sp. n.
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<normalizedToken originalValue="A–C">A-C</normalizedToken>
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anterior end: A dorsal view B ventral view C lateral view (arrowed nephridial papilla) D U48-U52 lateral view E - total view, rectangle shows position of D (arrow indicates last segment with notochaetae)
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<normalizedToken originalValue="F–H">F-H</normalizedToken>
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uncini: F, G U1 H U48,
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<normalizedToken originalValue="A–F">A-F</normalizedToken>
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, H Sevastopol st. 2587:
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<normalizedToken originalValue="A–E">A-E</normalizedToken>
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holotype F, H paratype GAPEM 232335. All worms but E stained with methylene blue. Scale bars: 2 mm (
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<normalizedToken originalValue="A–E">A-E</normalizedToken>
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); 20
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<normalizedToken originalValue="μm">μm</normalizedToken>
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(
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<normalizedToken originalValue="F–H">F-H</normalizedToken>
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).
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</paragraph>
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</caption>
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<paragraph pageId="0" pageNumber="29">Notopodia from BS2. In small worms, more or less similar, almost cylindrical; in large worms, anterior notopodia transversely flattened, those in first few anterior segments several times smaller than those that are most developed (Fig. 4). Largest specimens in each sample with about 30-40 segments with notopodia, the smallest with fewer, but even specimens ten or more times smaller than largest (by size) with over 30; the next 40-60 segments without notopodia, i.e. about 1/3-1/2 of body length without notopodial segments. Notochaetae with narrow brims (Fig. 11A).</paragraph>
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<paragraph pageId="0" pageNumber="29">Neuropodia from C3; tori increasing in size to U10, then becoming progressively smaller. Uncini in a single row, uncini of U1 with well-developed prow and crest with one tooth in profile (Fig. 4F, G); posterior uncini (U48) very similar (Fig. 4H).</paragraph>
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<paragraph pageId="0" pageNumber="29">Pygidium with crenulated margin, without cirri or papillae.</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="29" type="differential diagnosis">
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<paragraph pageId="0" pageNumber="29">Differential diagnosis.</paragraph>
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<paragraph pageId="0" pageNumber="29">
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Only one previously known species,
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<taxonomicName lsidName="T. pascua" pageId="0" pageNumber="29" rank="species" species="pascua">T. pascua</taxonomicName>
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(Fauchald, 1977) from the Atlantic coast of Panama, has two pairs of branchiae and no eyespots. It differs from
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<taxonomicName lsidName="T. davehalli" pageId="0" pageNumber="29" rank="species" species="davehalli">T. davehalli</taxonomicName>
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sp. n. in its lower number of branchial filaments: single filament in BS1 and BS2 in
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<taxonomicName lsidName="T. pascua" pageId="0" pageNumber="29" rank="species" species="pascua">T. pascua</taxonomicName>
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; up to 20 filaments in BS1 and up to 10 filaments in
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<taxonomicName lsidName="T. davehalli" pageId="0" pageNumber="29" rank="species" species="davehalli">T. davehalli</taxonomicName>
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. Only one previously known species,
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<taxonomicName lsidName="T. hamatus" pageId="0" pageNumber="29" rank="species" species="hamatus">T. hamatus</taxonomicName>
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Moore, 1905 from Pacific Alaska, has two pairs of branchiae and segments of the posterior half of the body without notopodia. It differs from
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<taxonomicName lsidName="T. davehalli" pageId="0" pageNumber="29" rank="species" species="davehalli">T. davehalli</taxonomicName>
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in the presence of eyespots and a lower number of branchial filaments: five in BS1 and BS2 in
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<taxonomicName lsidName="T. hamatus" pageId="0" pageNumber="29" rank="species" species="hamatus">T. hamatus</taxonomicName>
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; up to 20 filaments in BS1 and up to 10 filaments in
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<taxonomicName lsidName="T. davehalli" pageId="0" pageNumber="29" rank="species" species="davehalli">T. davehalli</taxonomicName>
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.
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<taxonomicName class="Polychaeta" family="Terebellidae" genus="Thelepus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Thelepus davehalli" order="Terebellida" pageId="0" pageNumber="29" phylum="Annelida" rank="species" species="davehalli">Thelepus davehalli</taxonomicName>
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differs from the other species described in this paper and other known species with two pairs of branchiae in the presence of fully developed segments without notopodia in the posterior 1/3-1/2 of the body.
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</paragraph>
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<paragraph pageId="0" pageNumber="29">
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The last biramous parapodia of
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<taxonomicName class="Polychaeta" family="Terebellidae" genus="Thelepus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Thelepus davehalli" order="Terebellida" pageId="0" pageNumber="29" phylum="Annelida" rank="species" species="davehalli">Thelepus davehalli</taxonomicName>
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is well developed (not reduced), following uniramous parapodia with well-developed neuropodia, contrary to other species described in this study (Fig. 4D, E). Anterior segments lack well-developed notopodia, contrary to those in
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<taxonomicName lsidName="T. cincinnatus" pageId="0" pageNumber="29" rank="species" species="cincinnatus">T. cincinnatus</taxonomicName>
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and
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<taxonomicName lsidName="T. marthae" pageId="0" pageNumber="29" rank="species" species="marthae">T. marthae</taxonomicName>
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.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="29" type="remarks">
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<paragraph pageId="0" pageNumber="29">Remark.</paragraph>
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<paragraph pageId="0" pageNumber="29">
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<taxonomicName class="Polychaeta" family="Terebellidae" genus="Thelepus" higherTaxonomySource="CoL" infraspecific-rank="var." kingdom="Animalia" lsidName="Thelepus cincinnatus var. andreanae" order="Terebellida" pageId="0" pageNumber="29" phylum="Annelida" rank="variety" species="cincinnatus" variety="andreanae">Thelepus cincinnatus var. andreanae</taxonomicName>
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McIntosh, 1922 was described from within the range of
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<taxonomicName lsidName="T. davehalli" pageId="0" pageNumber="29" rank="species" species="davehalli">T. davehalli</taxonomicName>
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. However, McIntosh clearly stated "Dorsal cephalic collar with eye-specks" while this new species has no eyespots.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="29" type="etymology">
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<paragraph pageId="0" pageNumber="29">Etymology.</paragraph>
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<paragraph pageId="0" pageNumber="29">The species is named after my friend Mr. David Hall, Head of Marine and Freshwater Laboratories, Associate Director APEM Ltd., UK (Fig. 5).</paragraph>
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<caption pageId="0" pageNumber="29">
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<paragraph pageId="0" pageNumber="29">Figure 5. David Hall. The photograph was taken by his eldest daughter, Tara Hall.</paragraph>
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</caption>
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</subSubSection>
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</treatment>
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</document> |