130 lines
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130 lines
11 KiB
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<document ID-DOI="http://dx.doi.org/10.3897/zookeys.934.49359" ID-GBIF-Dataset="99c6eb43-dc87-4106-82ed-1325f4df7b26" ID-PMC="PMC7250940" ID-Pensoft-Pub="1313-2970-934-25" ID-Pensoft-UUID="598339B5A93C5551BC575CD4048FC8D3" ID-PubMed="32508494" ID-ZooBank="B9F2C8D8C0314191B6F51E78D4D6881E" ModsDocID="1313-2970-934-25" checkinTime="1589939917447" checkinUser="pensoft" docAuthor="Smith, Rachel R. & Short, Andrew Edward Z." docDate="2020" docId="E394B9E153C35218B5D72E0B1C326C64" docLanguage="en" docName="ZooKeys 934: 25-79" docOrigin="ZooKeys 934" docSource="http://dx.doi.org/10.3897/zookeys.934.49359" docTitle="Chasmogenus sinnamarensis Smith & Short 2020, sp. nov." docType="treatment" docUuid="DF6731D8-AD00-498E-B2B1-083827DACCB0" docUuidSource="ZooBank" docVersion="4" id="598339B5A93C5551BC575CD4048FC8D3" lastPageNumber="25" masterDocId="598339B5A93C5551BC575CD4048FC8D3" masterDocTitle="Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae)" masterLastPageNumber="79" masterPageNumber="25" pageNumber="25" updateTime="1668168854401" 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>Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae)</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>Smith, Rachel R.</mods:namePart>
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<mods:affiliation>Department of Ecology & Evolutionary Biology, and Division of Entomology, Biodiversity Institute, University of Kansas, Lawrence, KS 66045, USA</mods:affiliation>
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<mods:nameIdentifier type="email">rr.smith816@gmail.com</mods:nameIdentifier>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Short, Andrew Edward Z.</mods:namePart>
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<mods:affiliation>Department of Ecology & Evolutionary Biology, and Division of Entomology, Biodiversity Institute, University of Kansas, Lawrence, KS 66045, USA</mods:affiliation>
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<mods:nameIdentifier type="email">aezshort@ku.edu</mods:nameIdentifier>
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</mods:name>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:relatedItem type="host">
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<mods:titleInfo>
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<mods:title>ZooKeys</mods:title>
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</mods:titleInfo>
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<mods:part>
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<mods:date>2020</mods:date>
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<mods:detail type="volume">
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<mods:number>934</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>25</mods:start>
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<mods:end>79</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.934.49359</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.934.49359</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1313-2970-934-25</mods:identifier>
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<mods:identifier type="ZooBank">B9F2C8D8C0314191B6F51E78D4D6881E</mods:identifier>
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<mods:identifier type="Pensoft-UUID">598339B5A93C5551BC575CD4048FC8D3</mods:identifier>
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</mods:mods>
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<treatment ID-GBIF-Taxon="164241236" LSID="urn:lsid:zoobank.org:act:DF6731D8-AD00-498E-B2B1-083827DACCB0" httpUri="http://treatment.plazi.org/id/E394B9E153C35218B5D72E0B1C326C64" lastPageNumber="25" pageId="0" pageNumber="25">
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<subSubSection pageId="0" pageNumber="25" type="nomenclature">
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<paragraph pageId="0" pageNumber="25">
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<taxonomicName LSID="E394B9E1-53C3-5218-B5D7-2E0B1C326C64" authority="Smith & Short, 2020" authorityName="Smith & Short" authorityYear="2020" class="Insecta" family="Hydrophilidae" genus="Chasmogenus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Chasmogenus sinnamarensis" order="Coleoptera" pageId="0" pageNumber="25" phylum="Arthropoda" rank="species" species="sinnamarensis" status="sp. nov.">Chasmogenus sinnamarensis</taxonomicName>
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<taxonomicNameLabel pageId="0" pageNumber="25">sp. nov.</taxonomicNameLabel>
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<figureCitation captionStart="Figure 15" captionStartId="F15" captionText="Figure 15. Aedeagi of Chasmogenus spp. A-D C. pandus A dorsal view (Suriname) B side view (Suriname) C specimen from French Guiana D specimen from Brazil E C. ligulatus F C. sinnamarensis G C. undulatus H, I C. acuminatus H specimen from Suriname I specimen from Guyana. Scale bars: 0.25 mm." figureDoi="10.3897/zookeys.934.49359.figure15" httpUri="https://binary.pensoft.net/fig/411770" pageId="0" pageNumber="25">Figures 15F</figureCitation>
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<figureCitation captionStart="Figure 17" captionStartId="F17" captionText="Figure 17. Distribution of Chasmogenus spp." figureDoi="10.3897/zookeys.934.49359.figure17" httpUri="https://binary.pensoft.net/fig/411772" pageId="0" pageNumber="25">, 17</figureCitation>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="25" type="type material">
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<paragraph pageId="0" pageNumber="25">Type material.</paragraph>
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<paragraph pageId="0" pageNumber="25">
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<emphasis bold="true" pageId="0" pageNumber="25">Holotype (male)</emphasis>
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: "French Guyana:/ Road Petit Saut,/ Crique Eau Claire/ xii.2002-1.2003./ M. Balke leg.", "DNA VOUCHER/ Extraction #/ SLE-77" (SEMC).
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<emphasis bold="true" pageId="0" pageNumber="25">Paratypes (3)</emphasis>
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: same data as holotype (3 exs., SEMC including DNA Voucher SLE517).
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="25" type="differential diagnosis">
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<paragraph pageId="0" pageNumber="25">Differential diagnosis.</paragraph>
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<paragraph pageId="0" pageNumber="25">
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<taxonomicName authorityName="Smith & Short" authorityYear="2020" class="Insecta" family="Hydrophilidae" genus="Chasmogenus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Chasmogenus sinnamarensis" order="Coleoptera" pageId="0" pageNumber="25" phylum="Arthropoda" rank="species" species="sinnamarensis">
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<emphasis italics="true" pageId="0" pageNumber="25">Chasmogenus sinnamarensis</emphasis>
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</taxonomicName>
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is similar in morphology and size to
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<taxonomicName lsidName="C. berbicensis" pageId="0" pageNumber="25" rank="species" species="berbicensis">
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<emphasis italics="true" pageId="0" pageNumber="25">C. berbicensis</emphasis>
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</taxonomicName>
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, but can be differentiated from that species by the form of the mentum, which possesses an elevated ridge posterior to the anteromedial notch. This mentum character is also shared with the Andean species
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<taxonomicName lsidName="C. bariorum" pageId="0" pageNumber="25" rank="species" species="bariorum">
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<emphasis italics="true" pageId="0" pageNumber="25">C. bariorum</emphasis>
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</taxonomicName>
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,
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<taxonomicName lsidName="C. cuspifer" pageId="0" pageNumber="25" rank="species" species="cuspifer">
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<emphasis italics="true" pageId="0" pageNumber="25">C. cuspifer</emphasis>
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</taxonomicName>
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, and
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<taxonomicName lsidName="C. lineatus" pageId="0" pageNumber="25" rank="species" species="lineatus">
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<emphasis italics="true" pageId="0" pageNumber="25">C. lineatus</emphasis>
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</taxonomicName>
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, however these species either have a distinctly toothed mesoventrite (not toothed in
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<taxonomicName lsidName="C. sinnamarensis" pageId="0" pageNumber="25" rank="species" species="sinnamarensis">
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<emphasis italics="true" pageId="0" pageNumber="25">C. sinnamarensis</emphasis>
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</taxonomicName>
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) or clypeus without an anteromedial emargination (emarginated in
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<taxonomicName lsidName="C. sinnamarensis" pageId="0" pageNumber="25" rank="species" species="sinnamarensis">
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<emphasis italics="true" pageId="0" pageNumber="25">C. sinnamarensis</emphasis>
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</taxonomicName>
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).
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="25" type="description">
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<paragraph pageId="0" pageNumber="25">Description.</paragraph>
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<paragraph pageId="0" pageNumber="25">
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<emphasis bold="true" italics="true" pageId="0" pageNumber="25">Size and color.</emphasis>
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Total body length 4.9-5.0 mm. Body form elongate oval with slightly curved lateral margins. Dorsum of head dark brown. Pronotum dark brown with slightly paler lateral margins, elytra uniformly dark brown.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="25">Head.</emphasis>
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Ground punctation on head fine. Clypeus with anteromedial emargination, which exposes broadly rounded shaped gap between clypeus and labrum. Mentum moderately depressed in anterior half with rounded anteromedial notch followed by rounded elevated ridge just posterior of the notch. Maxillary palps long, longer than width of head immediately posterior to eyes.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="25">Thorax.</emphasis>
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Ground punctation on pronotum fine. Prosternum mildly tectiform. Mesoventrite with very weak elevation forming a posteromedial longitudinal carina. Metafemora densely and uniformly pubescent in basal nine-tenths.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="25">Aedeagus.</emphasis>
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Aedeagus (Fig.
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<figureCitation captionStart="Figure 15" captionStartId="F15" captionText="Figure 15. Aedeagi of Chasmogenus spp. A-D C. pandus A dorsal view (Suriname) B side view (Suriname) C specimen from French Guiana D specimen from Brazil E C. ligulatus F C. sinnamarensis G C. undulatus H, I C. acuminatus H specimen from Suriname I specimen from Guyana. Scale bars: 0.25 mm." figureDoi="10.3897/zookeys.934.49359.figure15" httpUri="https://binary.pensoft.net/fig/411770" pageId="0" pageNumber="25">15F</figureCitation>
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) with median lobe widest at base, nearly parallel sided in basal three-quarters, then narrowing abruptly to form an acute triangular apex which is even with or slightly extends beyond the apex of the parameres. Sclerite of the median lobe not expanded. Gonopore situated less than half of one gonopore width below the apex of the median lobe. Parameres symmetrical, with outer margins straight, with apex very slightly inwardly curved and bluntly rounded. Basal piece long, ca. as long as the length of the parameres.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="25" type="etymology">
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<paragraph pageId="0" pageNumber="25">Etymology.</paragraph>
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<paragraph pageId="0" pageNumber="25">Named after the Sinnamary River, close to where it was collected. To be treated as a noun in apposition.</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="25" type="distribution">
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<paragraph pageId="0" pageNumber="25">Distribution.</paragraph>
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<paragraph pageId="0" pageNumber="25">
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Only known from the type locality in French Guiana (Fig.
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<figureCitation captionStart="Figure 17" captionStartId="F17" captionText="Figure 17. Distribution of Chasmogenus spp." figureDoi="10.3897/zookeys.934.49359.figure17" httpUri="https://binary.pensoft.net/fig/411772" pageId="0" pageNumber="25">17</figureCitation>
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).
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="25" type="biology_ecology">
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<paragraph pageId="0" pageNumber="25">Biology.</paragraph>
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<paragraph pageId="0" pageNumber="25">This species was collected from a clear water creek.</paragraph>
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</subSubSection>
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</treatment>
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</document> |