111 lines
9.9 KiB
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111 lines
9.9 KiB
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<document ID-DOI="http://dx.doi.org/10.3897/zookeys.632.10483" ID-GBIF-Dataset="7562b1b3-f243-4f1a-a41a-ffee220fab30" ID-PMC="PMC5126545" ID-Pensoft-Pub="1313-2970-632-57" ID-PubMed="27920604" ID-ZBK="0F28B33D1F614113A4BF707A420C554D" ModsDocAuthor="" ModsDocDate="2016" ModsDocID="1313-2970-632-57" ModsDocOrigin="ZooKeys 632" ModsDocTitle="Two new species of the megadiverse lentic diving-beetle genus Hydrovatus (Coleoptera, Dytiscidae) described from NE Thailand" checkinTime="1479361910016" checkinUser="pensoft" docAuthor="Bistroem, Olof & Bergsten, Johannes" docDate="2016" docId="A41F434F4C914D383874BA792E8FA3C5" docLanguage="en" docName="ZooKeys 632: 57-66" docOrigin="ZooKeys 632" docSource="http://dx.doi.org/10.3897/zookeys.632.10483" docTitle="Hydrovatus globosus Bistroem & Bergsten, 2016, sp. n." docType="treatment" docUuid="F8776495-71E1-4BEF-9AA2-365074523F52" docUuidSource="ZooBank" docVersion="5" lastPageNumber="62" masterDocId="9865E9667D46FFA7FF8E337C5277404C" masterDocTitle="Two new species of the megadiverse lentic diving-beetle genus Hydrovatus (Coleoptera, Dytiscidae) described from NE Thailand" masterLastPageNumber="66" masterPageNumber="57" pageNumber="61" updateTime="1668163707474" 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>Two new species of the megadiverse lentic diving-beetle genus Hydrovatus (Coleoptera, Dytiscidae) described from NE Thailand</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>Bistroem, Olof</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>Bergsten, Johannes</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>2016</mods:date>
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<mods:detail type="volume">
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<mods:number>632</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>57</mods:start>
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<mods:end>66</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.632.10483</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.632.10483</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1313-2970-632-57</mods:identifier>
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<mods:identifier type="ZBK">0F28B33D1F614113A4BF707A420C554D</mods:identifier>
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<mods:identifier type="ZooBank">0F28B33D1F614113A4BF707A420C554D</mods:identifier>
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</mods:mods>
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<treatment ID-GBIF-Taxon="127876129" LSID="urn:lsid:zoobank.org:act:F8776495-71E1-4BEF-9AA2-365074523F52" httpUri="http://treatment.plazi.org/id/A41F434F4C914D383874BA792E8FA3C5" lastPageId="5" lastPageNumber="62" pageId="4" pageNumber="61">
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<subSubSection pageId="4" pageNumber="61" type="multiple">
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<paragraph pageId="4" pageNumber="61">Taxon classification Animalia Coleoptera Dytiscidae</paragraph>
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</subSubSection>
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<subSubSection pageId="4" pageNumber="61" type="nomenclature">
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<paragraph pageId="4" pageNumber="61">
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<taxonomicName LSID="http://zoobank.org/F8776495-71E1-4BEF-9AA2-365074523F52" class="Insecta" family="Dytiscidae" genus="Hydrovatus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Hydrovatus globosus" order="Coleoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="globosus">Hydrovatus globosus</taxonomicName>
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<taxonomicNameLabel pageId="4" pageNumber="61">sp. n.</taxonomicNameLabel>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="4" pageNumber="61" type="type locality">
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<paragraph pageId="4" pageNumber="61">Type locality.</paragraph>
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<paragraph pageId="4" pageNumber="61">Thailand: Khon-Kaen [city and province in the region of Isan, NE Thailand].</paragraph>
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</subSubSection>
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<subSubSection pageId="4" pageNumber="61" type="type material">
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<paragraph pageId="4" pageNumber="61">Type material</paragraph>
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<paragraph pageId="4" pageNumber="61">25 exs. (10 males, 15 females). Holotype, male: "Nordost-Thailand Khon Kaen, ad lucem 22.4. 1980 leg. S. Saowakontha" (HNHM). - Paratypes: Same data as holotype (11 exs. HNHM, 3 exs. FMNH, 3 exs. NHRS); same data as holotype but "20.5. 1980" (2 exs. HNHM, 1 ex. FMNH); same data as holotype but "29.4. 1980 Dr. Saati Saowakontha leg." (1 ex. HNHM); same data as holotype but "2.9. 1980 Dr. Saati Saowakontha leg." (1 ex. HNHM); same data as holotype but "19.2. 1981 Dr. Saati Saowakontha leg." (2 exs. HNHM).</paragraph>
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</subSubSection>
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<subSubSection pageId="4" pageNumber="61" type="diagnosis">
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<paragraph pageId="4" pageNumber="61">Diagnosis.</paragraph>
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<paragraph pageId="4" pageNumber="61">
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The new species belongs to a complicated group of
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<taxonomicName class="Insecta" family="Dytiscidae" genus="Hydrovatus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Hydrovatus" order="Coleoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="genus">Hydrovatus</taxonomicName>
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, out of which
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<taxonomicName class="Insecta" family="Dytiscidae" genus="Hydrovatus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Hydrovatus rufoniger" order="Coleoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="rufoniger">Hydrovatus rufoniger</taxonomicName>
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(Clark) (Fig. 1d) seems to be closest. The new species is distinguished from this species but also other close species from the Oriental region, by its globular shaped body with a very weak extension of the elytral apex (Fig. 1c). Deviating structures in the shape of the penis apex are also characteristic for
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<taxonomicName class="Insecta" family="Dytiscidae" genus="Hydrovatus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Hydrovatus globosus" order="Coleoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="globosus">Hydrovatus globosus</taxonomicName>
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(Fig. 2
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<normalizedToken originalValue="d–f">d-f</normalizedToken>
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).
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</paragraph>
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</subSubSection>
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<subSubSection lastPageId="5" lastPageNumber="62" pageId="4" pageNumber="61" type="description">
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<paragraph pageId="4" pageNumber="61">Description.</paragraph>
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<paragraph pageId="4" pageNumber="61">Body: Almost unicolored ferrugineous to dark ferrugineous; no distinct color-pattern exhibited. Body-shape almost globular with apex of elytra moderately extended (Fig. 1c). Length 3.8-4.0 mm, width 2.4-2.6 mm.</paragraph>
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<paragraph lastPageId="5" lastPageNumber="62" pageId="4" pageNumber="61">
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Head: Anteriorly between eyes finely margined; outline slightly undulate (frontal edge medially, weakly curved inwards). At each eye with a quite distinct, triangular depression with irregular punctures in it. Close to eye with a row of fine punctures and
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<pageBreakToken pageId="5" pageNumber="62" start="start">from</pageBreakToken>
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frontal depression a row of punctures continues sparsely (disappears gradually) towards middle of head. Other parts of head surface impunctate with scattered, fine and hardly discernible punctures anteriorly. Head slightly matte to rather shiny; extensively finely reticulated. Antenna filiform, with no distinct modifications.
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</paragraph>
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<paragraph pageId="5" pageNumber="62">Pronotum: With dense and fine punctures, which laterally fade away gradually. Surface between punctures shiny, almost without reticulation. Laterally, fine, in part indistinct reticulation discernible.</paragraph>
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<paragraph pageId="5" pageNumber="62">Elytra: Finely and densely punctate. Laterally, punctures fade away and become indistinct/disappear in part. Discal, dorsolateral and lateral row of punctures rather indistinct and in part hardly discernible. Between punctures, surface rather shiny; reticulation very fine and sporadically discernible; extensively reticulation almost absent.</paragraph>
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<paragraph pageId="5" pageNumber="62">Ventral aspect: Finely to fairly finely and somewhat sparsely punctate. Abdomen almost impunctate. Shiny, reticulation almost absent; hardly visible, rudimentary meshes of microsculpture discernible on metacoxal plates. Abdomen slightly matte; with very fine, elongated meshes of microsculpture. Stridulation apparatus rather narrow, provided with numerous minute striae. Apex of prosternal process laterally finely margined; medial surface flattened with sparse and vague punctures. Apical ventrite medially with a distinct depression; extreme apex of ventrite with a fine bulb (a minor enlargement).</paragraph>
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<paragraph pageId="5" pageNumber="62">Legs: Ferrugineous. Pro- and mesotarsus slightly enlarged. Protarsal claws asymmetric; internal claw distinctly angled and thickened.</paragraph>
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<paragraph pageId="5" pageNumber="62">
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Male genitalia as in Fig. 2
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<normalizedToken originalValue="d–g">d-g</normalizedToken>
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.
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</paragraph>
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<paragraph pageId="5" pageNumber="62">Female: Elytra posteriorly rather distinctly microsculptured, matte. Protarsal claws not modified. No stridulation apparatus on metacoxal plates.</paragraph>
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</subSubSection>
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<subSubSection pageId="5" pageNumber="62" type="distribution">
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<paragraph pageId="5" pageNumber="62">Distribution.</paragraph>
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<paragraph pageId="5" pageNumber="62">Thailand.</paragraph>
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</subSubSection>
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<subSubSection pageId="5" pageNumber="62" type="collecting circumstances">
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<paragraph pageId="5" pageNumber="62">Collecting circumstances.</paragraph>
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<paragraph pageId="5" pageNumber="62">Entire type material collected at light.</paragraph>
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</subSubSection>
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<subSubSection pageId="5" pageNumber="62" type="etymology">
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<paragraph pageId="5" pageNumber="62">Etymology.</paragraph>
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<paragraph pageId="5" pageNumber="62">
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The species name
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<taxonomicName lsidName="globosus" pageId="5" pageNumber="62" rank="species" species="globosus">globosus</taxonomicName>
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refers to the spherical body-shape of the new species.
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</paragraph>
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</subSubSection>
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</treatment>
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</document>
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