<document ID-DOI="http://dx.doi.org/10.3897/zookeys.768.24423" ID-PMC="PMC6019434" ID-Pensoft-Pub="1313-2970-768-113" ID-Pensoft-UUID="CB01CA30FFB4F96DFFA2FF86FFAEFFB6" ID-PubMed="29955215" ID-Zenodo-Dep="1298776" ID-ZooBank="399BCC3E9D6F4231870E05C79B9FD4B0" ModsDocID="1313-2970-768-113" checkinTime="1529468775230" checkinUser="pensoft" docAuthor="Giron, Jennifer C. & Short, Andrew Edward Z." docDate="2018" docId="7F23A163FA6FBA81CB5053DDC0D2F88C" docLanguage="en" docName="ZooKeys 768: 113-158" docOrigin="ZooKeys 768" docPubDate="2018-06-19" docSource="http://dx.doi.org/10.3897/zookeys.768.24423" docTitle="Crucisternum xingu Girón & Short 2018, sp. n." docType="treatment" docUuid="7EF9B5FF-DD04-423E-80F8-CDF21AE0DD1A" docUuidSource="ZooBank" docVersion="6" id="CB01CA30FFB4F96DFFA2FF86FFAEFFB6" lastPageNumber="126" masterDocId="CB01CA30FFB4F96DFFA2FF86FFAEFFB6" masterDocTitle="Three new genera of acidocerine water scavenger beetles from tropical South America (Coleoptera, Hydrophilidae, Acidocerinae)" masterLastPageNumber="158" masterPageNumber="113" pageNumber="124" updateTime="1668165917053" updateUser="ExternalLinkService"> <mods:mods xmlns:mods="http://www.loc.gov/mods/v3"> <mods:titleInfo> <mods:title>Three new genera of acidocerine water scavenger beetles from tropical South America (Coleoptera, Hydrophilidae, Acidocerinae)</mods:title> </mods:titleInfo> <mods:name type="personal"> <mods:role> <mods:roleTerm>Author</mods:roleTerm> </mods:role> <mods:namePart>Giron, Jennifer C.</mods:namePart> <mods:nameIdentifier type="ORCID">https://orcid.org/0000-0002-0851-6883</mods:nameIdentifier> <mods:affiliation>Department of Ecology & Evolutionary Biology, and Division of Entomology, Biodiversity Institute, University of Kansas, Lawrence, KS 66045, USA</mods:affiliation> <mods:nameIdentifier type="email">entiminae@gmail.com</mods:nameIdentifier> </mods:name> <mods:name type="personal"> <mods:role> <mods:roleTerm>Author</mods:roleTerm> </mods:role> <mods:namePart>Short, Andrew Edward Z.</mods:namePart> <mods:affiliation>Department of Ecology & Evolutionary Biology, and Division of Entomology, Biodiversity Institute, University of Kansas, Lawrence, KS 66045, USA</mods:affiliation> </mods:name> <mods:typeOfResource>text</mods:typeOfResource> <mods:relatedItem type="host"> <mods:titleInfo> <mods:title>ZooKeys</mods:title> </mods:titleInfo> <mods:part> <mods:date>2018</mods:date> <mods:detail type="pubDate"> <mods:number>2018-06-19</mods:number> </mods:detail> <mods:detail type="volume"> <mods:number>768</mods:number> </mods:detail> <mods:extent unit="page"> <mods:start>113</mods:start> <mods:end>158</mods:end> </mods:extent> </mods:part> </mods:relatedItem> <mods:location> <mods:url>http://dx.doi.org/10.3897/zookeys.768.24423</mods:url> </mods:location> <mods:classification>journal article</mods:classification> <mods:identifier type="DOI">http://dx.doi.org/10.3897/zookeys.768.24423</mods:identifier> <mods:identifier type="Pensoft-Pub">1313-2970-768-113</mods:identifier> <mods:identifier type="ZooBank">399BCC3E9D6F4231870E05C79B9FD4B0</mods:identifier> <mods:identifier type="Pensoft-UUID">CB01CA30FFB4F96DFFA2FF86FFAEFFB6</mods:identifier> <mods:identifier type="Zenodo-Dep">1298776</mods:identifier> </mods:mods> <treatment ID-GBIF-Taxon="146002406" LSID="urn:lsid:zoobank.org:act:7EF9B5FF-DD04-423E-80F8-CDF21AE0DD1A" httpUri="http://treatment.plazi.org/id/7F23A163FA6FBA81CB5053DDC0D2F88C" lastPageId="13" lastPageNumber="126" pageId="11" pageNumber="124"> <subSubSection pageId="11" pageNumber="124" type="nomenclature"> <paragraph pageId="11" pageNumber="124"> <taxonomicName LSID="http://zoobank.org/7EF9B5FF-DD04-423E-80F8-CDF21AE0DD1A" authority="Girón & Short, 2018" authorityName="Girón & Short" authorityYear="2018" class="Insecta" family="Hydrophilidae" genus="Crucisternum" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Crucisternum xingu" order="Coleoptera" pageId="11" pageNumber="124" phylum="Arthropoda" rank="species" species="xingu" status="sp. n.">Crucisternum xingu</taxonomicName> <taxonomicNameLabel pageId="11" pageNumber="124">sp. n.</taxonomicNameLabel> <figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Habitus of Crucisternum spp.: A-D Crucisternum sinuatus: A dorsal view B lateral view C ventral view D head E-H Crucisternum xingu: E dorsal view F lateral view G ventral view H head. Scale bars: 1 mm." figureDoi="10.3897/zookeys.768.24423.figure3" httpUri="https://binary.pensoft.net/fig/211213" pageId="11" pageNumber="124">Figs 3E-H</figureCitation> <figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Aedeagus of Crucisternum spp.: A-B Crucisternum ouboteri: A Guyana B Brownsberg C Crucisternum toboganensis D Crucisternum vanessae E-F Crucisternum xingu: E colln 6 F colln 23 G-H Cuscisternum sinuatus: G colln 23 H BR 18 - 0302 - 04 A I Crucisternum escalera J Crucisternum queneyi. Scale bars: 0.25 mm." figureDoi="10.3897/zookeys.768.24423.figure6" httpUri="https://binary.pensoft.net/fig/211216" pageId="11" pageNumber="124">; 6E, F</figureCitation> <figureCitation captionStart="Figure 7" captionStartId="F7" captionText="Figure 7. Distribution of Crucisternum species." figureDoi="10.3897/zookeys.768.24423.figure7" httpUri="https://binary.pensoft.net/fig/211218" pageId="11" pageNumber="124">; 7</figureCitation> </paragraph> </subSubSection> <subSubSection pageId="12" pageNumber="125" type="type material"> <paragraph pageId="12" pageNumber="125"> <pageBreakToken pageId="12" pageNumber="125" start="start">Type</pageBreakToken> material examined. </paragraph> <paragraph pageId="12" pageNumber="125"> <emphasis bold="true" pageId="12" pageNumber="125">Holotype (male)</emphasis> : " <emphasis bold="true" pageId="12" pageNumber="125">BRAZIL</emphasis> : <normalizedToken originalValue="Pará">Para</normalizedToken> / Rio Xingu Camp <geoCoordinate degrees="52" direction="west" minutes="22" orientation="longitude" precision="925" value="-52.366665">52°22'W</geoCoordinate> , <geoCoordinate degrees="3" direction="south" minutes="39" orientation="latitude" precision="925" value="-3.65">3°39'S</geoCoordinate> / Altamira, ca 60km S.; 14.x.1986/ leg. P. Spangler & O. Flint// Colln. #23, stream on/ left branch of trail 1" (USNM). <emphasis bold="true" pageId="12" pageNumber="125"> Paratype (1): BRAZIL: <normalizedToken originalValue="Pará">Para</normalizedToken> </emphasis> : same, except "3.x.1986; Colln. #6;/ 1st jungle stream on trail 1" (1, USNM). </paragraph> </subSubSection> <subSubSection pageId="12" pageNumber="125" type="differential diagnosis"> <paragraph pageId="12" pageNumber="125">Differential diagnosis.</paragraph> <paragraph pageId="12" pageNumber="125"> <taxonomicName authorityName="Girón & Short" authorityYear="2018" class="Insecta" family="Hydrophilidae" genus="Crucisternum" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Crucisternum xingu" order="Coleoptera" pageId="12" pageNumber="125" phylum="Arthropoda" rank="species" species="xingu"> <emphasis italics="true" pageId="12" pageNumber="125">Crucisternum xingu</emphasis> </taxonomicName> is very similar to <taxonomicName lsidName="C. sinuatus" pageId="12" pageNumber="125" rank="species" species="sinuatus"> <emphasis italics="true" pageId="12" pageNumber="125">C. sinuatus</emphasis> </taxonomicName> and <taxonomicName lsidName="C. escalera" pageId="12" pageNumber="125" rank="species" species="escalera"> <emphasis italics="true" pageId="12" pageNumber="125">C. escalera</emphasis> </taxonomicName> in the shallowness of the punctation and the uniform coloration along the body. It can be readily recognized by its dark brown coloration (as opposed to orange brown; compare Fig. <figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Habitus of Crucisternum spp.: A-D Crucisternum sinuatus: A dorsal view B lateral view C ventral view D head E-H Crucisternum xingu: E dorsal view F lateral view G ventral view H head. Scale bars: 1 mm." figureDoi="10.3897/zookeys.768.24423.figure3" httpUri="https://binary.pensoft.net/fig/211213" pageId="12" pageNumber="125">3E-H</figureCitation> to Fig. <figureCitation captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Habitus of Crucisternum spp.: A-D Crucisternum escalera: A dorsal view B lateral view C ventral view D head E-H Crucisternum queneyi: E dorsal view F lateral view G ventral view H head. Scale bars: 1 mm." figureDoi="10.3897/zookeys.768.24423.figure1" httpUri="https://binary.pensoft.net/fig/211211" pageId="12" pageNumber="125">1</figureCitation> ), which is shared with <taxonomicName lsidName="C. sinuatus" pageId="12" pageNumber="125" rank="species" species="sinuatus"> <emphasis italics="true" pageId="12" pageNumber="125">C. sinuatus</emphasis> </taxonomicName> , from which it can be distinguished by the median lobe gradually narrowing towards the apex (see Fig. <figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Aedeagus of Crucisternum spp.: A-B Crucisternum ouboteri: A Guyana B Brownsberg C Crucisternum toboganensis D Crucisternum vanessae E-F Crucisternum xingu: E colln 6 F colln 23 G-H Cuscisternum sinuatus: G colln 23 H BR 18 - 0302 - 04 A I Crucisternum escalera J Crucisternum queneyi. Scale bars: 0.25 mm." figureDoi="10.3897/zookeys.768.24423.figure6" httpUri="https://binary.pensoft.net/fig/211216" pageId="12" pageNumber="125">6E, F</figureCitation> ; as opposed to constricted at midlength, continuing as a narrow and roundly pointed bar, see Fig. <figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Aedeagus of Crucisternum spp.: A-B Crucisternum ouboteri: A Guyana B Brownsberg C Crucisternum toboganensis D Crucisternum vanessae E-F Crucisternum xingu: E colln 6 F colln 23 G-H Cuscisternum sinuatus: G colln 23 H BR 18 - 0302 - 04 A I Crucisternum escalera J Crucisternum queneyi. Scale bars: 0.25 mm." figureDoi="10.3897/zookeys.768.24423.figure6" httpUri="https://binary.pensoft.net/fig/211216" pageId="12" pageNumber="125">6G, H</figureCitation> ), and the nearly straight to sinuate outer margins of the parameres (as opposed to strongly constricted at apical third, continuing nearly parallel). </paragraph> </subSubSection> <subSubSection lastPageId="13" lastPageNumber="126" pageId="12" pageNumber="125" type="description"> <paragraph pageId="12" pageNumber="125">Description.</paragraph> <paragraph lastPageId="13" lastPageNumber="126" pageId="12" pageNumber="125"> Body length 2.2-2.4 mm, width 1.3-1.4 mm. General coloration uniformly dark brown (Fig. <figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Habitus of Crucisternum spp.: A-D Crucisternum sinuatus: A dorsal view B lateral view C ventral view D head E-H Crucisternum xingu: E dorsal view F lateral view G ventral view H head. Scale bars: 1 mm." figureDoi="10.3897/zookeys.768.24423.figure3" httpUri="https://binary.pensoft.net/fig/211213" pageId="12" pageNumber="125">3E</figureCitation> ). Elytra with punctures shallowly marked. Aedeagus with outer margins of parameres sinuate to nearly straight; inner margins of parameres <pageBreakToken pageId="13" pageNumber="126" start="start">concave</pageBreakToken> along apical third; median lobe gradually narrowing towards apex; apex of median lobe rounded (Fig. <figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Aedeagus of Crucisternum spp.: A-B Crucisternum ouboteri: A Guyana B Brownsberg C Crucisternum toboganensis D Crucisternum vanessae E-F Crucisternum xingu: E colln 6 F colln 23 G-H Cuscisternum sinuatus: G colln 23 H BR 18 - 0302 - 04 A I Crucisternum escalera J Crucisternum queneyi. Scale bars: 0.25 mm." figureDoi="10.3897/zookeys.768.24423.figure6" httpUri="https://binary.pensoft.net/fig/211216" pageId="13" pageNumber="126">6E-F</figureCitation> ). </paragraph> </subSubSection> <subSubSection pageId="13" pageNumber="126" type="etymology"> <paragraph pageId="13" pageNumber="126">Etymology.</paragraph> <paragraph pageId="13" pageNumber="126">Noun in apposition. Named after the Xingu River where the known specimens were collected.</paragraph> </subSubSection> <subSubSection pageId="13" pageNumber="126" type="distribution"> <paragraph pageId="13" pageNumber="126">Distribution.</paragraph> <paragraph pageId="13" pageNumber="126"> Brazil ( <normalizedToken originalValue="Pará">Para</normalizedToken> ). See Fig. <figureCitation captionStart="Figure 7" captionStartId="F7" captionText="Figure 7. Distribution of Crucisternum species." figureDoi="10.3897/zookeys.768.24423.figure7" httpUri="https://binary.pensoft.net/fig/211218" pageId="13" pageNumber="126">7</figureCitation> . </paragraph> </subSubSection> <subSubSection pageId="13" pageNumber="126" type="biology_ecology"> <paragraph pageId="13" pageNumber="126">Biology.</paragraph> <paragraph pageId="13" pageNumber="126">This species is known from forest streams.</paragraph> <caption ID-Zenodo-Dep="1298848" doi="10.3897/zookeys.768.24423.figure7" httpUri="https://binary.pensoft.net/fig/211218" pageId="13" pageNumber="126" start="Figure 7" startId="F7"> <paragraph pageId="13" pageNumber="126"> <emphasis bold="true" pageId="13" pageNumber="126">Figure 7.</emphasis> Distribution of <taxonomicName authorityName="Girón & Short" authorityYear="2018" class="Insecta" family="Hydrophilidae" genus="Crucisternum" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Crucisternum" order="Coleoptera" pageId="13" pageNumber="126" phylum="Arthropoda" rank="genus"> <emphasis italics="true" pageId="13" pageNumber="126">Crucisternum</emphasis> </taxonomicName> species. </paragraph> </caption> </subSubSection> </treatment> </document>