<document id="2BDBE8B307ABBDA2A4D5BD92E33DD9E1" ID-CLB-Dataset="21739" ID-DOI="10.37520/aemnp.2020.016" ID-GBIF-Dataset="6f4e1328-0bba-4f1c-aa66-4c1fe1fda040" ID-ISSN="1804-6487" ID-Zenodo-Dep="3879760" ID-ZooBank="45563A23-8582-4C53-81F3-591948E7A74D" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" checkinTime="1591387310617" checkinUser="tatiana" docAuthor="Perkins, Philip D." docDate="2020" docId="060AF5509B203708FEA51248FAEBFC5D" docLanguage="en" docName="ActaEntMusNatPra.60.1.291-301.pdf" docOrigin="Acta Entomologica Musei Nationalis Pragae 60 (1)" docStyle="DocumentStyle:BA2C5C8540539042E893A65A182CEA85.8:ActaEntMusNatPra.2018-.journal_article" docStyleId="BA2C5C8540539042E893A65A182CEA85" docStyleName="ActaEntMusNatPra.2018-.journal_article" docStyleVersion="8" docTitle="Hydrochus directus Perkins 2020, sp. nov." docType="treatment" docVersion="6" lastPageNumber="295" masterDocId="FA338D289B24370CFF8B1664FF97FFE8" masterDocTitle="Taxonomy of Guatemalan water beetles in the genus Hydrochus (Coleoptera: Hydrochidae)" masterLastPageNumber="301" masterPageNumber="291" pageNumber="295" updateTime="1698842118860" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-NC-ND-3.0">
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<mods:title id="3FA78A8FDBBE4BC25A35769008972885">Taxonomy of Guatemalan water beetles in the genus Hydrochus (Coleoptera: Hydrochidae)</mods:title>
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<mods:namePart id="2D4A9C30C7C652D83E4A1511B288138A">Perkins, Philip D.</mods:namePart>
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<mods:title id="8D4962761B5893E6DBA7E1E94D2FE05A">Acta Entomologica Musei Nationalis Pragae</mods:title>
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<subSubSection id="C6B917CD9B203708FEA51248FDF6FBAC" box="[302,609,1068,1092]" pageId="4" pageNumber="295" type="nomenclature">
<paragraph id="8E1C44469B203708FEA51248FDF6FBAC" blockId="4.[302,609,1068,1118]" box="[302,609,1068,1092]" pageId="4" pageNumber="295">
<heading id="D554F32A9B203708FEA51248FDF6FBAC" box="[302,609,1068,1092]" centered="true" fontSize="10" level="2" pageId="4" pageNumber="295" reason="3">
<emphasis id="BCD798549B203708FEA51248FDF6FBAC" bold="true" box="[302,609,1068,1092]" pageId="4" pageNumber="295">
<taxonomicName id="49A33FC59B203708FEA51248FD92FBAC" ID-CoL="8Y4PX" authority="Perkins, 2020" authorityName="Perkins" authorityYear="2020" box="[302,517,1068,1092]" class="Insecta" family="Hydrochidae" genus="Hydrochus" kingdom="Animalia" order="Coleoptera" pageId="4" pageNumber="295" phylum="Arthropoda" rank="species" species="directus" status="sp. nov.">
<emphasis id="BCD798549B203708FEA51248FD92FBAC" bold="true" box="[302,517,1068,1092]" italics="true" pageId="4" pageNumber="295">Hydrochus directus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A7E4252F9B203708FD871249FDF6FBAC" box="[524,609,1069,1092]" pageId="4" pageNumber="295" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="C6B917CD9B203708FE10122FFE64FBB6" box="[411,499,1099,1118]" pageId="4" pageNumber="295" type="description">
<paragraph id="8E1C44469B203708FE10122FFE64FBB6" blockId="4.[302,609,1068,1118]" box="[411,499,1099,1118]" pageId="4" pageNumber="295">
(
<figureCitation id="169858C39B203708FE2A122FFE40FBB6" box="[417,471,1099,1118]" captionStart="Fig" captionStartId="1.[150,181,2064,2083]" captionTargetBox="[151,1437,799,2034]" captionTargetId="figure@1.[151,1437,798,2034]" captionTargetPageId="1" captionText="Fig. 1. Dorsal habitus of Guatemalan Hydrochus species." figureDoi="http://doi.org/10.5281/zenodo.3879762" httpUri="https://zenodo.org/record/3879762/files/figure.png" pageId="4" pageNumber="295">Figs 1</figureCitation>
, 
<figureCitation id="169858C39B203708FE69122FFE7AFBB6" box="[482,493,1099,1118]" captionStart="Fig" captionStartId="3.[151,182,2057,2076]" captionTargetBox="[220,1373,626,2023]" captionTargetId="figure@3.[191,1397,612,2043]" captionTargetPageId="3" captionText="Fig. 3. Hydrochus directus sp. nov., habitus and male genitalia of holotype." figureDoi="http://doi.org/10.5281/zenodo.3879768" httpUri="https://zenodo.org/record/3879768/files/figure.png" pageId="4" pageNumber="295">3</figureCitation>
)
</paragraph>
</subSubSection>
<subSubSection id="C6B917CD9B203708FF1C1211FE16FAE5" pageId="4" pageNumber="295" type="materials_examined">
<paragraph id="8E1C44469B203708FF1C1211FE16FAE5" blockId="4.[151,761,1141,1293]" pageId="4" pageNumber="295">
<emphasis id="BCD798549B203708FF1C1211FE8DFB60" bold="true" box="[151,282,1141,1160]" pageId="4" pageNumber="295">Type material.</emphasis>
HƟĿƟŦYPൾ:male (
<collectionCode id="E8B2DC839B203708FE3E1211FE6BFB60" box="[437,508,1141,1160]" country="USA" httpUri="http://grbio.org/cool/142r-0w94" name="Smithsonian Institution, National Museum of Natural History" pageId="4" pageNumber="295" type="Museum">NMNH</collectionCode>
): ‘ 
<collectingRegion id="4C678AA49B203708FD801211FD01FB60" box="[523,662,1141,1160]" country="Guatemala" name="Guatemala" pageId="4" pageNumber="295">GUATEMALA</collectingRegion>
, 20 Mi. SW Puerto Barrios 
<date id="FA1D62869B203708FE9612F4FE07FB4B" box="[285,400,1168,1187]" pageId="4" pageNumber="295" value="1965-08-16">VIII-16-1965</date>
Paul J. Spanglerʼ. PARAŦYPൾඌ (
<specimenCount id="98A58FCF9B203708FD2912F4FD78FB4B" box="[674,751,1168,1187]" pageId="4" pageNumber="295" type="generic">13 spec.</specimenCount>
): 
<emphasis id="BCD798549B203708FF1C12CEFEBDFB55" bold="true" box="[151,298,1194,1213]" pageId="4" pageNumber="295">
<collectingCountry id="F6B404D69B203708FF1C12CEFEB1FB55" box="[151,294,1194,1213]" name="Guatemala" pageId="4" pageNumber="295">GUATEMALA</collectingCountry>
:
</emphasis>
same data as 
<typeStatus id="5118FAE49B203708FE2A12CEFE7BFB55" box="[417,492,1194,1213]" pageId="4" pageNumber="295" type="holotype">holotype</typeStatus>
(4 
<collectionCode id="E8B2DC839B203708FD8212CEFDD9FB55" box="[521,590,1194,1213]" country="USA" httpUri="http://grbio.org/cool/142r-0w94" name="Smithsonian Institution, National Museum of Natural History" pageId="4" pageNumber="295" type="Museum">NMNH</collectionCode>
); ‘ 
<quantity id="495BE9A39B203708FDEB12CEFD01FB55" box="[608,662,1194,1213]" metricMagnitude="4" metricUnit="m" metricValue="4.5061632" pageId="4" pageNumber="295" unit="mi" value="28.0">28mi.</quantity>
SW Puerto Barrios, 
<date id="FA1D62869B203708FF6B12A1FEC2FB30" box="[224,341,1221,1240]" pageId="4" pageNumber="295" value="1965-08-16">VIII-16-1965</date>
, Paul J. Spanglerʼ (1: 
<collectionCode id="E8B2DC839B203708FD9B12A1FDC2FB30" box="[528,597,1221,1240]" country="USA" httpUri="http://grbio.org/cool/142r-0w94" name="Smithsonian Institution, National Museum of Natural History" pageId="4" pageNumber="295" type="Museum">NMNH</collectionCode>
); ‘15 Mi. W. Pijije, 
<date id="FA1D62869B203708FF1C1284FE95FB1B" box="[151,258,1248,1267]" pageId="4" pageNumber="295" value="1965-08-05">VIII-5-1965</date>
, P. J. Spanglerʼ (1: 
<collectionCode id="E8B2DC839B203708FE251284FE64FB1B" box="[430,499,1248,1267]" country="USA" httpUri="http://grbio.org/cool/142r-0w94" name="Smithsonian Institution, National Museum of Natural History" pageId="4" pageNumber="295" type="Museum">NMNH</collectionCode>
); ‘ 
<collectingRegion id="4C678AA49B203708FD8D1284FDACFB1B" box="[518,571,1248,1267]" country="Guatemala" name="Peten" pageId="4" pageNumber="295">Peten</collectingRegion>
, Tikal, 
<date id="FA1D62869B203708FDF51284FD62FB1B" box="[638,757,1248,1267]" pageId="4" pageNumber="295" value="1974-06-28">28 June 1974</date>
, W. E. Steinerʼ (7: 
<collectionCode id="E8B2DC839B203708FEB9129EFEE0FAE5" box="[306,375,1274,1293]" country="USA" httpUri="http://grbio.org/cool/142r-0w94" name="Smithsonian Institution, National Museum of Natural History" pageId="4" pageNumber="295" type="Museum">NMNH</collectionCode>
).
</paragraph>
</subSubSection>
<subSubSection id="C6B917CD9B203708FF1C1342FDBFFA15" pageId="4" pageNumber="295" type="diagnosis">
<paragraph id="8E1C44469B203708FF1C1342FDBFFA15" blockId="4.[151,760,1318,2077]" pageId="4" pageNumber="295">
<emphasis id="BCD798549B203708FF1C1342FE1DFAD5" bold="true" box="[151,394,1318,1341]" pageId="4" pageNumber="295">Differential diagnosis.</emphasis>
Among Guatemalan species, 
<taxonomicName id="49A33FC59B203708FD371343FF40FAB6" authorityName="Perkins" authorityYear="2020" class="Insecta" family="Hydrochidae" genus="Hydrochus" kingdom="Animalia" order="Coleoptera" pageId="4" pageNumber="295" phylum="Arthropoda" rank="species" species="directus">
<emphasis id="BCD798549B203708FD371343FF40FAB6" italics="true" pageId="4" pageNumber="295">H. directus</emphasis>
</taxonomicName>
is recognized by the combination of moderate size (ca. 2.54–3.00 mm), the densely punctate pronotum with the reliefs slightly less punctate than the depressions, and the male genitalia (
<figureCitation id="169858C39B203708FEE813C2FE33FA55" box="[355,420,1446,1469]" captionStart="Fig" captionStartId="3.[151,182,2057,2076]" captionTargetBox="[220,1373,626,2023]" captionTargetId="figure@3.[191,1397,612,2043]" captionTargetPageId="3" captionText="Fig. 3. Hydrochus directus sp. nov., habitus and male genitalia of holotype." figureDoi="http://doi.org/10.5281/zenodo.3879768" httpUri="https://zenodo.org/record/3879768/files/figure.png" pageId="4" pageNumber="295">Fig. 3</figureCitation>
; described below). This species has a generalized 
<taxonomicName id="49A33FC59B203708FEDC13A2FE5CFA35" authorityName="Leach" authorityYear="1817" box="[343,459,1478,1501]" class="Insecta" family="Hydrochidae" genus="Hydrochus" kingdom="Animalia" order="Coleoptera" pageId="4" pageNumber="295" phylum="Arthropoda" rank="genus">
<emphasis id="BCD798549B203708FEDC13A2FE5CFA35" box="[343,459,1478,1501]" italics="true" pageId="4" pageNumber="295">Hydrochus</emphasis>
</taxonomicName>
habitus; reliable determinations will require dissection of males.
</paragraph>
</subSubSection>
<subSubSection id="C6B917CD9B203708FF1C1062FB24FCBD" pageId="4" pageNumber="295" type="description">
<paragraph id="8E1C44469B203708FF1C1062FD6FF8B5" blockId="4.[151,760,1318,2077]" pageId="4" pageNumber="295">
<emphasis id="BCD798549B203708FF1C1062FEB6F9F5" bold="true" box="[151,289,1542,1565]" pageId="4" pageNumber="295">Description.</emphasis>
Habitus as illustrated in 
<figureCitation id="169858C39B203708FDAA1062FDC8F9F5" box="[545,607,1542,1565]" captionStart="Fig" captionStartId="3.[151,182,2057,2076]" captionTargetBox="[220,1373,626,2023]" captionTargetId="figure@3.[191,1397,612,2043]" captionTargetPageId="3" captionText="Fig. 3. Hydrochus directus sp. nov., habitus and male genitalia of holotype." figureDoi="http://doi.org/10.5281/zenodo.3879768" httpUri="https://zenodo.org/record/3879768/files/figure.png" pageId="4" pageNumber="295">Fig. 3</figureCitation>
. Size (in mm): 
<typeStatus id="5118FAE49B203708FF1C1042FF60F9D5" box="[151,247,1574,1597]" pageId="4" pageNumber="295" type="holotype">holotype</typeStatus>
: body (length to elytral apices / width) 2.76 / 1.02; head width 0.67; pronotum length / width 0.62 / 0.65; PA 0.62; PB 0.56; elytra length / width 1.73 / 1.02. Body size moderate (ca. 2.54–3.00 mm). Dorsum grey, with moderately strong gold iridescence, elytra with black spots. Legs testaceous, with tibiofemoral joints slightly darker. Punctation on elytra ca. 2× that of pronotum. Elytra interstriae ca. 1.0–1.5× strial puncture diameter. Interstria 9 
<superScript id="79D6E90E9B203708FD271160FD2FF8FA" attach="left" box="[684,696,1796,1810]" fontSize="6" pageId="4" pageNumber="295">th</superScript>
more convex than others, overhanging 10 
<superScript id="79D6E90E9B203708FD9F1140FDB7F8DA" attach="left" box="[532,544,1828,1842]" fontSize="6" pageId="4" pageNumber="295">th</superScript>
interstria. Callus on usual area of 5 
<superScript id="79D6E90E9B203708FEBB1120FEABF8BA" attach="left" box="[304,316,1860,1874]" fontSize="6" pageId="4" pageNumber="295">th</superScript>
interstria weakly raised, moderately long.
</paragraph>
<paragraph id="8E1C44469B203708FF3E1102FD07F835" blockId="4.[151,760,1318,2077]" pageId="4" pageNumber="295">Pronotum length slightly less than width, widest at about anterior 1/3, narrowed at base, sides sinuate, smooth; anterior margin bisinuate; depressions shallow, reliefs low, depressions more densely punctate than reliefs.</paragraph>
<paragraph id="8E1C44469B203708FF3E1182FC17FF1D" blockId="4.[151,760,1318,2077]" lastBlockId="4.[828,1437,190,949]" pageId="4" pageNumber="295">Elytra with spaces between strial punctures narrow ridges; apices rather sharply conjointly rounded in dorsal view, in lateral view outer margin with very slight angulation.</paragraph>
<paragraph id="8E1C44469B203708FCD1169AFB26FD9D" blockId="4.[828,1437,190,949]" pageId="4" pageNumber="295">
Male genitalia (
<figureCitation id="169858C39B203708FB8D169AFBDFFEFD" box="[1030,1096,254,277]" captionStart="Fig" captionStartId="3.[151,182,2057,2076]" captionTargetBox="[220,1373,626,2023]" captionTargetId="figure@3.[191,1397,612,2043]" captionTargetPageId="3" captionText="Fig. 3. Hydrochus directus sp. nov., habitus and male genitalia of holotype." figureDoi="http://doi.org/10.5281/zenodo.3879768" httpUri="https://zenodo.org/record/3879768/files/figure.png" pageId="4" pageNumber="295">Fig. 3</figureCitation>
). General characters: paramere tips elongate, slightly widened, distal ends pointed, lateral margins straight from 
<emphasis id="BCD798549B203708FBB9175AFBF7FEBD" box="[1074,1120,318,341]" italics="true" pageId="4" pageNumber="295">plsa</emphasis>
to distal tip, medial margins of tips emarginate and well separated from lateral margins of aedeagus, distal end of tips extending slightly beyond aedeagus, in lateral view tips narrow, pointed; aedeagus lanceolate in dorsal/ventral views, widest at ca. midlength, ca. same width as 
<emphasis id="BCD798549B203708FB2917BAFB45FE1D" box="[1186,1234,478,501]" italics="true" pageId="4" pageNumber="295">adbl</emphasis>
, from which point markedly tapering to sharp distal end, with narrowly sclerotized lateral margins; basal piece slightly shorter than parameres, tapering from distal end to orifice, with rim of orifice strongly sclerotized.
</paragraph>
<paragraph id="8E1C44469B203708FCD1141AFC48FCFD" blockId="4.[828,1437,190,949]" pageId="4" pageNumber="295">
Dorsal surface: 
<emphasis id="BCD798549B203708FB8B141AFBBEFD7D" box="[1024,1065,638,661]" italics="true" pageId="4" pageNumber="295">adtl</emphasis>
located slightly distal to midlength of aedeagus; 
<emphasis id="BCD798549B203708FC4214FAFB9DFD5D" box="[969,1034,670,693]" italics="true" pageId="4" pageNumber="295">pdmm</emphasis>
narrowly overlapping 
<emphasis id="BCD798549B203708FA8B14FAFABFFD5D" box="[1280,1320,670,693]" italics="true" pageId="4" pageNumber="295">alm</emphasis>
over basal two-thirds then arcuate where paramere tips begin; 
<emphasis id="BCD798549B203708FAE614DAFA0BFD3D" box="[1389,1436,702,725]" italics="true" pageId="4" pageNumber="295">adbl</emphasis>
moderately large, ca. same width as greatest width of aedeagus shaft.
</paragraph>
<paragraph id="8E1C44469B203708FCD1157AFB24FCBD" blockId="4.[828,1437,190,949]" pageId="4" pageNumber="295">
Ventral surface: 
<emphasis id="BCD798549B203708FB8D157BFBD1FCDE" box="[1030,1094,799,822]" italics="true" pageId="4" pageNumber="295">pvmm</emphasis>
very slightly overlapping 
<emphasis id="BCD798549B203708FAD0157AFA14FCDD" box="[1371,1411,798,821]" italics="true" pageId="4" pageNumber="295">alm</emphasis>
at base; 
<emphasis id="BCD798549B203708FCF2155AFC36FCBD" box="[889,929,830,853]" italics="true" pageId="4" pageNumber="295">avtl</emphasis>
at about proximal fourth.
</paragraph>
</subSubSection>
<subSubSection id="C6B917CD9B203708FCB7153AFAEBFC5D" pageId="4" pageNumber="295" type="etymology">
<paragraph id="8E1C44469B203708FCB7153AFAEBFC5D" blockId="4.[828,1437,190,949]" pageId="4" pageNumber="295">
<emphasis id="BCD798549B203708FCB7153AFC29FC9D" bold="true" box="[828,958,862,885]" pageId="4" pageNumber="295">Etymology.</emphasis>
Named in reference to the male genitalia, which have the paramere tips elongate, with straight lateral margins, and the aedeagus sharply pointed. Adjective.
</paragraph>
</subSubSection>
</treatment>
</document>