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<document id="E66DAB033C7F37B383043447B090930E" ID-DOI="10.11646/zootaxa.4994.1.1" ID-ISSN="1175-5326" ID-Zenodo-Dep="5043261" ID-ZooBank="107FCA64-345F-40A4-99D3-5C1441EEAD93" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" checkinTime="1624993528766" checkinUser="plazi" docAuthor="Perkins, Philip D." docDate="2021" docId="03A187DEFFE4FFE66194FA110174F5F6" docLanguage="en" docName="zootaxa.4994.1.1.pdf" docOrigin="Zootaxa 4994 (1)" docStyle="DocumentStyle:5EBBA59367AD13919D70D935FA04F6A3.14:Zootaxa.2013-.monograph" docStyleId="5EBBA59367AD13919D70D935FA04F6A3" docStyleName="Zootaxa.2013-.monograph" docStyleVersion="14" docTitle="Hydrochus diversus Perkins 2021, new species" docType="treatment" docVersion="4" lastPageNumber="26" masterDocId="FF98FFA6FFFCFFFF6103FFF0045FF707" masterDocTitle="Taxonomy of water beetles in the genus Hydrochus Leach, 1817, from Bolivia, Brazil and Paraguay (Coleoptera: Hydrochidae)" masterLastPageNumber="93" masterPageNumber="1" pageNumber="25" updateTime="1698978858223" updateUser="plazi">
<mods:mods id="744A990880116D19596EE3157344A6E9" xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo id="61A403A07587B58C901379A19A7D08BA">
<mods:title id="6E06ABD9C2A5680F7CD97BE18602B53E">Taxonomy of water beetles in the genus Hydrochus Leach, 1817, from Bolivia, Brazil and Paraguay (Coleoptera: Hydrochidae)</mods:title>
</mods:titleInfo>
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<mods:namePart id="F4BD8E8ED89CA66DA4AB2DFAB3670537">Perkins, Philip D.</mods:namePart>
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<mods:typeOfResource id="CA08A7B981B44FC228EFB72D40E8150D">text</mods:typeOfResource>
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<mods:title id="63F001512627FE5AC5CEF3F57075A1CF">Zootaxa</mods:title>
</mods:titleInfo>
<mods:part id="7004FDBC9D5517AA1E0101D522007044">
<mods:date id="F4FDAE9D5CB0CC888FFBCA9A06218542">2021</mods:date>
<mods:detail id="4F84D4F91076FDFBBD251C199AFF23E8" type="pubDate">
<mods:number id="72E27A07347316C5390CBC7AC69375BE">2021-06-28</mods:number>
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<mods:detail id="60BF39995800EDA7E9A6B7A548FEDC61" type="volume">
<mods:number id="D61800D9D68C97297C42C9A0E288536A">4994</mods:number>
</mods:detail>
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<mods:number id="DA355CCF47BD04DE3BFA9492F1B841D0">1</mods:number>
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<mods:start id="A70921E6F502FBD1BC623A89077F91E6">1</mods:start>
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<mods:classification id="3DF19E43C16E6D23319FEC0E8A227D14">journal article</mods:classification>
<mods:identifier id="4D4647CA763C00D6D88739A4E49C44C1" type="DOI">10.11646/zootaxa.4994.1.1</mods:identifier>
<mods:identifier id="205F2D449269515D666B26FB999EFA4B" type="ISSN">1175-5326</mods:identifier>
<mods:identifier id="F871149EF626EEB91C9956FFFA68FBB7" type="Zenodo-Dep">5043261</mods:identifier>
<mods:identifier id="E492AEB8973595728021B2E213133610" type="ZooBank">107FCA64-345F-40A4-99D3-5C1441EEAD93</mods:identifier>
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<treatment id="03A187DEFFE4FFE66194FA110174F5F6" ID-DOI="http://doi.org/10.5281/zenodo.5043959" ID-Zenodo-Dep="5043959" LSID="urn:lsid:plazi:treatment:03A187DEFFE4FFE66194FA110174F5F6" httpUri="http://treatment.plazi.org/id/03A187DEFFE4FFE66194FA110174F5F6" lastPageId="25" lastPageNumber="26" pageId="24" pageNumber="25">
<subSubSection id="C3126543FFE4FFE76194FA110679F2FC" box="[151,550,1505,1532]" pageId="24" pageNumber="25" type="nomenclature">
<paragraph id="8BB736C8FFE4FFE76194FA110679F2FC" blockId="24.[151,550,1505,1569]" box="[151,550,1505,1532]" pageId="24" pageNumber="25">
<heading id="D0FF81A4FFE4FFE76194FA110679F2FC" bold="true" box="[151,550,1505,1532]" fontSize="11" level="2" pageId="24" pageNumber="25" reason="4">
<emphasis id="B97CEADAFFE4FFE76194FA110679F2FC" bold="true" box="[151,550,1505,1532]" pageId="24" pageNumber="25">
<taxonomicName id="4C084D4BFFE4FFE76194FA1105D8F2FB" ID-CoL="8Y4Q2" authority="Perkins, 2021" authorityName="Perkins" authorityYear="2021" box="[151,391,1505,1532]" class="Insecta" family="Hydrochidae" genus="Hydrochus" kingdom="Animalia" order="Coleoptera" pageId="24" pageNumber="25" phylum="Arthropoda" rank="species" species="diversus" status="sp. nov.">
<emphasis id="B97CEADAFFE4FFE76194FA1105D8F2FB" bold="true" box="[151,391,1505,1532]" italics="true" pageId="24" pageNumber="25">Hydrochus diversus</emphasis>
</taxonomicName>
,
<taxonomicNameLabel id="A24F57A1FFE4FFE76095FA120679F2FC" box="[406,550,1505,1532]" pageId="24" pageNumber="25" rank="species">new species</taxonomicNameLabel>
</emphasis>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="C3126543FFE4FFE76194F9F6053EF127" box="[151,353,1542,1569]" pageId="24" pageNumber="25" type="description">
<paragraph id="8BB736C8FFE4FFE76194F9F6053EF127" blockId="24.[151,550,1505,1569]" box="[151,353,1542,1569]" pageId="24" pageNumber="25">
<figureCitation id="13332A4DFFE4FFE76194F9F604BBF127" box="[151,228,1542,1568]" captionStart="FIGURE 3" captionStartId="8.[151,250,1943,1967]" captionTargetBox="[169,1397,189,1912]" captionTargetId="figure-28@8.[154,1433,181,1919]" captionTargetPageId="8" captionText="FIGURE 3. Dorsal habitus of Hydrochus species in study area." figureDoi="http://doi.org/10.5281/zenodo.5043269" httpUri="https://zenodo.org/record/5043269/files/figure.png" pageId="24" pageNumber="25">Figs. 3</figureCitation>
,
<figureCitation id="13332A4DFFE4FFE761F2F9F60550F127" box="[241,271,1542,1568]" captionStart="FIGURES 16–17" captionStartId="60.[151,264,1944,1968]" captionTargetBox="[170,1429,216,1871]" captionTargetId="figure-28@60.[151,1435,181,1920]" captionTargetPageId="60" captionText="FIGURES 16–17. Habitus and male genitalia of holotypes. 16. Hydrochus austrinus n. sp. 17. Hydrochus diversus n. sp." figureDoi="http://doi.org/10.5281/zenodo.5043294" httpUri="https://zenodo.org/record/5043294/files/figure.png" pageId="24" pageNumber="25">17</figureCitation>
,
<figureCitation id="13332A4DFFE4FFE76018F9F60566F126" box="[283,313,1542,1569]" captionStart="FIGURES 57–58" captionStartId="81.[151,264,1928,1952]" captionTargetBox="[151,1435,181,1905]" captionTargetId="figure-15@81.[151,1435,181,1905]" captionTargetPageId="81" captionText="FIGURES 57–58. Geographical distributions. 57. Endemics and near endemics. 58. H. bituberculatus." figureDoi="http://doi.org/10.5281/zenodo.5043356" httpUri="https://zenodo.org/record/5043356/files/figure.png" pageId="24" pageNumber="25">57</figureCitation>
,
<figureCitation id="13332A4DFFE4FFE76046F9F6053EF127" box="[325,353,1542,1568]" captionStart="FIGURE 71" captionStartId="90.[151,250,1796,1820]" captionTargetBox="[166,1425,227,1738]" captionTargetId="figure-28@90.[151,1435,181,1773]" captionTargetPageId="90" captionText="FIGURE 71. Pictorial aid to species groups of Hydrochus from Bolivia, Brazil and Paraguay, using male genitalia. Not to same scale." figureDoi="http://doi.org/10.5281/zenodo.5043384" httpUri="https://zenodo.org/record/5043384/files/figure.png" pageId="24" pageNumber="25">71</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="C3126543FFE4FFE76194F9BE0558F18B" pageId="24" pageNumber="25" type="materials_examined">
<paragraph id="8BB736C8FFE4FFE76194F9BE0558F18B" blockId="24.[151,1437,1613,2036]" pageId="24" pageNumber="25">
<emphasis id="B97CEADAFFE4FFE76194F9BE0517F160" bold="true" box="[151,328,1613,1640]" pageId="24" pageNumber="25">Type Material.</emphasis>
<materialsCitation id="3B603C95FFE4FFE7604CF9BE0558F18B" collectionCode="NMNH" collectorName="W. H. Whitcomb" country="Brazil" location="Mato Grosso" pageId="24" pageNumber="25" specimenCount="1" stateProvince="Mato Grosso" typeStatus="holotype">
<emphasis id="B97CEADAFFE4FFE7604CF9BE0647F160" bold="true" box="[335,536,1613,1640]" pageId="24" pageNumber="25">
<typeStatus id="54B3886AFFE4FFE7604CF9BE05E3F16F" box="[335,444,1614,1640]" pageId="24" pageNumber="25" type="holotype">Holotype</typeStatus>
(male):
</emphasis>
“
<collectingCountry id="F31F7658FFE4FFE7632AF9BE06CAF16F" box="[553,661,1614,1640]" name="Brazil" pageId="24" pageNumber="25">BRAZIL</collectingCountry>
:
<collectingRegion id="49CCF82AFFE4FFE763A3F9BE076BF16F" box="[672,820,1614,1640]" country="Brazil" name="Mato Grosso" pageId="24" pageNumber="25">Mato Grosso</collectingRegion>
, Cuiaba Agri. Exp. Sta., IV.11.1972,
<collectorName id="26FD531EFFE4FFE765D1F9BE01CCF16F" box="[1234,1427,1614,1640]" pageId="24" pageNumber="25">W. H. Whitcomb</collectorName>
” (
<collectionCode id="ED19AE0DFFE4FFE7619CF98204A4F18B" box="[159,251,1650,1676]" country="USA" httpUri="http://grbio.org/cool/142r-0w94" name="Smithsonian Institution, National Museum of Natural History" pageId="24" pageNumber="25" type="Museum">NMNH</collectionCode>
).
</materialsCitation>
</paragraph>
</subSubSection>
<subSubSection id="C3126543FFE4FFE761C4F96507ECF01B" pageId="24" pageNumber="25" type="diagnosis">
<paragraph id="8BB736C8FFE4FFE761C4F96507ECF01B" blockId="24.[151,1437,1613,2036]" pageId="24" pageNumber="25">
<emphasis id="B97CEADAFFE4FFE761C4F965058CF1A8" bold="true" box="[199,467,1685,1711]" pageId="24" pageNumber="25">Differential Diagnosis.</emphasis>
Among Brazilian species, recognized by the combination of very small size (ca.
<quantity id="4CF09B2DFFE4FFE76468F9660498F1D3" metricMagnitude="-3" metricUnit="m" metricValue="1.89" pageId="24" pageNumber="25" unit="mm" value="1.89">1.89 mm</quantity>
), the black dorsum, the elytral interstria 5
<superScript id="7C7D9B80FFE4FFE76396F94906FDF1C0" attach="left" box="[661,674,1721,1735]" fontSize="6" pageId="24" pageNumber="25">th</superScript>
not raised, and lacking callus, the shallow pronotal depressions, and the male genitalia (
<figureCitation id="13332A4DFFE4FFE76068F92E05E1F1FF" box="[363,446,1758,1784]" captionStart="FIGURES 16–17" captionStartId="60.[151,264,1944,1968]" captionTargetBox="[170,1429,216,1871]" captionTargetId="figure-28@60.[151,1435,181,1920]" captionTargetPageId="60" captionText="FIGURES 16–17. Habitus and male genitalia of holotypes. 16. Hydrochus austrinus n. sp. 17. Hydrochus diversus n. sp." figureDoi="http://doi.org/10.5281/zenodo.5043294" httpUri="https://zenodo.org/record/5043294/files/figure.png" pageId="24" pageNumber="25">Fig. 17</figureCitation>
; described below). Differentiation from other similarly small sized species with similarly shaped pronotum and elytral sculpture will require dissection of males.
</paragraph>
</subSubSection>
<subSubSection id="C3126543FFE4FFE661C4F8D50706F5CA" lastPageId="25" lastPageNumber="26" pageId="24" pageNumber="25" type="description">
<paragraph id="8BB736C8FFE4FFE761C4F8D50502F0F3" blockId="24.[151,1437,1613,2036]" pageId="24" pageNumber="25">
<emphasis id="B97CEADAFFE4FFE761C4F8D5050EF038" bold="true" box="[199,337,1829,1855]" pageId="24" pageNumber="25">Description</emphasis>
. Size:
<typeStatus id="54B3886AFFE4FFE760A7F8D60659F047" box="[420,518,1830,1856]" pageId="24" pageNumber="25" type="holotype">holotype</typeStatus>
(length/width, mm): body (length to elytral apices) 1.89/0.76; head width 0.51; pronotum l/w 0.43/0.49; PA 0.47; PB 0.41; elytra 1.15/0.76. Habitus as illustrated (
<figureCitation id="13332A4DFFE4FFE76549F8BA00C0F063" box="[1098,1183,1866,1892]" captionStart="FIGURES 16–17" captionStartId="60.[151,264,1944,1968]" captionTargetBox="[170,1429,216,1871]" captionTargetId="figure-28@60.[151,1435,181,1920]" captionTargetPageId="60" captionText="FIGURES 16–17. Habitus and male genitalia of holotypes. 16. Hydrochus austrinus n. sp. 17. Hydrochus diversus n. sp." figureDoi="http://doi.org/10.5281/zenodo.5043294" httpUri="https://zenodo.org/record/5043294/files/figure.png" pageId="24" pageNumber="25">Fig. 17</figureCitation>
). Body size small (ca.
<quantity id="4CF09B2DFFE4FFE76194F89E055FF08F" box="[151,256,1902,1928]" metricMagnitude="-3" metricUnit="m" metricValue="1.89" pageId="24" pageNumber="25" unit="mm" value="1.89">1.89 mm</quantity>
). Dorsum dark brown to black, with very weak or no iridescence, elytra without black spots. Legs testaceous, with tibiofemoral joints darker. Punctation on elytra ca. 2–3x that of pronotum. Elytra interstriae ca. 0.5x strial puncture diameter. Interstria 5
<superScript id="7C7D9B80FFE4FFE76320F845066FF0C4" attach="left" box="[547,560,1973,1987]" fontSize="6" pageId="24" pageNumber="25">th</superScript>
not raised, and lacking callus. Interstria 9
<superScript id="7C7D9B80FFE4FFE762F8F8450057F0C4" attach="left" box="[1019,1032,1973,1987]" fontSize="6" pageId="24" pageNumber="25">th</superScript>
more convex than others, overhanging 10
<superScript id="7C7D9B80FFE4FFE761DDF82904B4F0E0" attach="left" box="[222,235,2009,2023]" fontSize="6" pageId="24" pageNumber="25">th</superScript>
interstria.
</paragraph>
<paragraph id="8BB736C8FFE5FFE661C4FF6705F1F7FE" blockId="25.[151,1437,151,753]" pageId="25" pageNumber="26">Pronotum slightly wider than long (ratio ca. 27/23), widest at anterior margin, narrowed at base, sides very slightly sinuate, smooth; anterior margin arcuate; depressions shallow; punctation moderately dense, denser in depressions than on reliefs.</paragraph>
<paragraph id="8BB736C8FFE5FFE661C4FEF307E2F646" blockId="25.[151,1437,151,753]" pageId="25" pageNumber="26">Elytra with spaces between strial punctures ca. 0.5x their diameter, or less; apices rather sharply conjointly rounded in dorsal view, in lateral view outer margin without angulation.</paragraph>
<paragraph id="8BB736C8FFE5FFE661C4FEBB0556F68E" blockId="25.[151,1437,151,753]" pageId="25" pageNumber="26">Ventral characters: Mentum punctate, with central depression; submentum with two foveae, small and widely separated.</paragraph>
<paragraph id="8BB736C8FFE5FFE661C4FE6300BBF582" blockId="25.[151,1437,151,753]" pageId="25" pageNumber="26">
Male genitalia (
<figureCitation id="13332A4DFFE5FFE66075FE630599F6AA" box="[374,454,403,429]" captionStart="FIGURES 16–17" captionStartId="60.[151,264,1944,1968]" captionTargetBox="[170,1429,216,1871]" captionTargetId="figure-28@60.[151,1435,181,1920]" captionTargetPageId="60" captionText="FIGURES 16–17. Habitus and male genitalia of holotypes. 16. Hydrochus austrinus n. sp. 17. Hydrochus diversus n. sp." figureDoi="http://doi.org/10.5281/zenodo.5043294" httpUri="https://zenodo.org/record/5043294/files/figure.png" pageId="25" pageNumber="26">Fig. 17</figureCitation>
) general characters: genitalia small, moderately stout, length ca. 5x greatest width, basal piece slightly longer than parameres (ratio ca. 6/5); paramere tips extending well beyond aedeagus tip, medial margins beyond aedeagus tip diverging slightly one from the other, slightly emarginate, plsa very small, lateral margins of tips sinuate; parameres with distinctive sclerotization; in lateral view parameres markedly tapering in distal 1/2, sharply pointed apically; aedeagus short, narrow, almost parallel-sided, slightly widened in proximal 1/2; basal piece in dorsal/ventral views narrowing from distal end to orifice, in lateral slightly arcuate, maximum width in dorsal/ventral views greater than lateral width, orifice markedly asymmetrical, margin sclerotized.
</paragraph>
<paragraph id="8BB736C8FFE5FFE661C4FD7F0097F5AE" blockId="25.[151,1437,151,753]" box="[199,1224,655,681]" pageId="25" pageNumber="26">Dorsal surface: adtl not apparent; pdmm markedly bisinuate, widely separated; adbl absent.</paragraph>
<paragraph id="8BB736C8FFE5FFE661C4FD430706F5CA" blockId="25.[151,1437,151,753]" box="[199,857,691,717]" pageId="25" pageNumber="26">Ventral surface: avtl not apparent; pvmm similar to pdmm.</paragraph>
</subSubSection>
<subSubSection id="C3126543FFE5FFE661C4FD270174F5F6" box="[199,1323,727,753]" pageId="25" pageNumber="26" type="etymology">
<paragraph id="8BB736C8FFE5FFE661C4FD270174F5F6" blockId="25.[151,1437,151,753]" box="[199,1323,727,753]" pageId="25" pageNumber="26">
<emphasis id="B97CEADAFFE5FFE661C4FD270517F5F6" bold="true" box="[199,328,727,753]" pageId="25" pageNumber="26">Etymology</emphasis>
. Named in reference to the marked difference in size of the parameres and the aedeagus.
</paragraph>
</subSubSection>
</treatment>
</document>
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