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<document id="493CB95837E06FB8B4B9888736A4E3B6" 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="03A187DEFFF2FFF16194FF2F0007F257" 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 accinctus Perkins 2021, new species" docType="treatment" docVersion="4" lastPageNumber="15" 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="15" updateTime="1698978858223" updateUser="plazi">
<mods:mods id="73945C34F43B7444A692275056242162" xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo id="DA12677692C5334F225FB85EC5A4C733">
<mods:title id="DC6463D1E430046C2D2BE22D6E7F84AD">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:role id="08601AE9FA8497830BFF19FEBDCF1CCE">
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<mods:namePart id="8C36C65051392D4E50C25D11003B173D">Perkins, Philip D.</mods:namePart>
</mods:name>
<mods:typeOfResource id="7F21DF4903990FAD1DC858491F6B7EBE">text</mods:typeOfResource>
<mods:relatedItem id="B57D2015D3DD8253F3C648D371F4E62B" type="host">
<mods:titleInfo id="C3B13519AEA8DEAD10CEB2B647BCA88B">
<mods:title id="289F7198ED4F9F87CDCF35372273946D">Zootaxa</mods:title>
</mods:titleInfo>
<mods:part id="458C3669CFBBB551DD9C7E53D1449017">
<mods:date id="00719F467058EE3CF6E4C805DBD31DE3">2021</mods:date>
<mods:detail id="FC9857BACBDCCFFF878F8E8A5A01E9CE" type="pubDate">
<mods:number id="447AD6F318196957B30F3100CB36F562">2021-06-28</mods:number>
</mods:detail>
<mods:detail id="D72E27F22E1E9195A8B537FD5D26AB6C" type="volume">
<mods:number id="CAFBD1E13D4CC4CA521110035748212F">4994</mods:number>
</mods:detail>
<mods:detail id="9DCD6A9156314B6374DB1FF60D860F11" type="issue">
<mods:number id="DB9DDB619D55A44DA70E45F2D1CD96E9">1</mods:number>
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<mods:start id="27DC0D2150313A61FD273196F147C00C">1</mods:start>
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<mods:classification id="EE2572184A2EE896AE11195E3FB24FEB">journal article</mods:classification>
<mods:identifier id="87575719458A88CF5061A78A0B29E668" type="DOI">10.11646/zootaxa.4994.1.1</mods:identifier>
<mods:identifier id="5CA10119067BBA10BF92C300EB51D42F" type="ISSN">1175-5326</mods:identifier>
<mods:identifier id="803F335EB8DCD78B51D9FFC7258B77DC" type="Zenodo-Dep">5043261</mods:identifier>
<mods:identifier id="88BFA0093794D1542D027A00A68EA8E1" type="ZooBank">107FCA64-345F-40A4-99D3-5C1441EEAD93</mods:identifier>
</mods:mods>
<treatment id="03A187DEFFF2FFF16194FF2F0007F257" ID-DOI="http://doi.org/10.5281/zenodo.5043934" ID-Zenodo-Dep="5043934" LSID="urn:lsid:plazi:treatment:03A187DEFFF2FFF16194FF2F0007F257" httpUri="http://treatment.plazi.org/id/03A187DEFFF2FFF16194FF2F0007F257" lastPageNumber="15" pageId="14" pageNumber="15">
<subSubSection id="C3126543FFF2FFF16194FF2F066AF7FE" box="[151,565,223,250]" pageId="14" pageNumber="15" type="nomenclature">
<paragraph id="8BB736C8FFF2FFF16194FF2F066AF7FE" blockId="14.[151,565,223,286]" box="[151,565,223,250]" pageId="14" pageNumber="15">
<heading id="D0FF81A4FFF2FFF16194FF2F066AF7FE" bold="true" box="[151,565,223,250]" fontSize="11" level="2" pageId="14" pageNumber="15" reason="4">
<emphasis id="B97CEADAFFF2FFF16194FF2F066AF7FE" bold="true" box="[151,565,223,250]" pageId="14" pageNumber="15">
<taxonomicName id="4C084D4BFFF2FFF16194FF2F05C9F7FE" ID-CoL="8Y4NW" authority="Perkins, 2021" authorityName="Perkins" authorityYear="2021" box="[151,406,223,250]" class="Insecta" family="Hydrochidae" genus="Hydrochus" kingdom="Animalia" order="Coleoptera" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="accinctus" status="sp. nov.">
<emphasis id="B97CEADAFFF2FFF16194FF2F05C9F7FE" bold="true" box="[151,406,223,250]" italics="true" pageId="14" pageNumber="15">Hydrochus accinctus</emphasis>
</taxonomicName>
,
<taxonomicNameLabel id="A24F57A1FFF2FFF160A6FF2F066AF7FE" box="[421,565,223,249]" pageId="14" pageNumber="15" rank="species">new species</taxonomicNameLabel>
</emphasis>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="C3126543FFF2FFF16194FEF3053EF61A" box="[151,353,259,286]" pageId="14" pageNumber="15" type="description">
<paragraph id="8BB736C8FFF2FFF16194FEF3053EF61A" blockId="14.[151,565,223,286]" box="[151,353,259,286]" pageId="14" pageNumber="15">
<figureCitation id="13332A4DFFF2FFF16194FEF304BCF61A" box="[151,227,259,285]" captionStart="FIGURE 1" captionStartId="6.[151,250,1943,1967]" captionTargetBox="[158,1402,188,1903]" captionTargetId="figure-28@6.[152,1435,181,1920]" captionTargetPageId="6" captionText="FIGURE 1. Dorsal habitus of Hydrochus species in study area." figureDoi="http://doi.org/10.5281/zenodo.5043263" httpUri="https://zenodo.org/record/5043263/files/figure.png" pageId="14" pageNumber="15">Figs. 1</figureCitation>
,
<figureCitation id="13332A4DFFF2FFF161F2FEF30550F61A" box="[241,271,259,285]" captionStart="FIGURES 24–25" captionStartId="64.[151,264,1944,1968]" captionTargetBox="[166,1426,196,1900]" captionTargetId="figure-28@64.[151,1435,181,1920]" captionTargetPageId="64" captionText="FIGURES 24–25. Habitus and male genitalia of holotypes. 24. Hydrochus accinctus n. sp. 25. Hydrochus amazonicus n. sp." figureDoi="http://doi.org/10.5281/zenodo.5043306" httpUri="https://zenodo.org/record/5043306/files/figure.png" pageId="14" pageNumber="15">24</figureCitation>
,
<figureCitation id="13332A4DFFF2FFF16018FEF30566F619" box="[283,313,259,286]" captionStart="FIGURES 53–54" captionStartId="79.[151,264,1964,1988]" captionTargetBox="[218,1368,181,1941]" captionTargetId="figure-15@79.[218,1368,181,1941]" captionTargetPageId="79" captionText="FIGURES 53–54. Geographical distributions. 53. H spanglerorum species group. 54. H collaris species group." figureDoi="http://doi.org/10.5281/zenodo.5043348" httpUri="https://zenodo.org/record/5043348/files/figure.png" pageId="14" pageNumber="15">53</figureCitation>
,
<figureCitation id="13332A4DFFF2FFF16046FEF3053EF61A" box="[325,353,259,285]" captionStart="FIGURE 70" captionStartId="89.[151,250,1862,1886]" captionTargetBox="[156,1432,201,1824]" captionTargetId="figure-15@89.[151,1435,181,1837]" captionTargetPageId="89" captionText="FIGURE 70. 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.5043382" httpUri="https://zenodo.org/record/5043382/files/figure.png" pageId="14" pageNumber="15">70</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="C3126543FFF2FFF16194FEB90070F682" pageId="14" pageNumber="15" type="materials_examined">
<paragraph id="8BB736C8FFF2FFF16194FEB90070F682" blockId="14.[151,1437,328,1360]" pageId="14" pageNumber="15">
<emphasis id="B97CEADAFFF2FFF16194FEB90518F665" bold="true" box="[151,327,328,355]" pageId="14" pageNumber="15">Type Material.</emphasis>
<materialsCitation id="3B603C95FFF2FFF1604EFEB90070F682" collectingDate="2018-07-11" collectionCode="INPA" collectorName="Short" country="Brazil" elevation="54" latitude="-5.50298" location="Amazonas" longLatPrecision="1" longitude="-62.12392" municipality="Tapaua" pageId="14" pageNumber="15" specimenCount="1" typeStatus="holotype">
<emphasis id="B97CEADAFFF2FFF1604EFEB9064AF665" bold="true" box="[333,533,328,355]" pageId="14" pageNumber="15">
<typeStatus id="54B3886AFFF2FFF1604EFEB905E5F664" box="[333,442,329,355]" pageId="14" pageNumber="15" type="holotype">Holotype</typeStatus>
(male):
</emphasis>
“
<collectingCountry id="F31F7658FFF2FFF16326FEB906CEF664" box="[549,657,329,355]" name="Brazil" pageId="14" pageNumber="15">BRAZIL</collectingCountry>
:
<location id="8ED76013FFF2FFF1639BFEB9074DF664" LSID="urn:lsid:plazi:treatment:03A187DEFFF2FFF16194FF2F0007F257:8ED76013FFF2FFF1639BFEB9074DF664" box="[664,786,329,355]" country="Brazil" latitude="-5.50298" longLatPrecision="1" longitude="-62.12392" municipality="Tapaua" name="Amazonas" pageId="14" pageNumber="15">Amazonas</location>
;
<collectingMunicipality id="6BD3ACB2FFF2FFF1621FFEB90730F664" box="[796,879,329,355]" pageId="14" pageNumber="15">Tapauá</collectingMunicipality>
,
<geoCoordinate id="EE3C500FFFF2FFF1627AFEB807BEF664" box="[889,993,328,355]" degrees="5.50298" direction="south" orientation="latitude" pageId="14" pageNumber="15" precision="1" value="-5.50298">-5.50298</geoCoordinate>
,
<geoCoordinate id="EE3C500FFFF2FFF162E9FEB8003EF665" box="[1002,1121,328,354]" degrees="62.12392" direction="west" orientation="longitude" pageId="14" pageNumber="15" precision="1" value="-62.12392">-62.12392</geoCoordinate>
;
<quantity id="4CF09B2DFFF2FFF16569FEB800FBF664" box="[1130,1188,328,355]" metricMagnitude="1" metricUnit="m" metricValue="5.4" pageId="14" pageNumber="15" unit="m" value="54.0">
<elevation id="0025D1FBFFF2FFF16569FEB800FBF664" box="[1130,1188,328,355]" metricMagnitude="1" metricUnit="m" metricValue="5.4" pageId="14" pageNumber="15" unit="m" value="54.0">54 m</elevation>
</quantity>
, c.
<locationDeviation id="9A052FEAFFF2FFF165CBFEB901C3F665" box="[1224,1436,328,355]" location="Humaita" pageId="14" pageNumber="15">
<quantity id="4CF09B2DFFF2FFF165CBFEB90143F665" box="[1224,1308,328,355]" metricMagnitude="5" metricUnit="m" metricValue="2.4" pageId="14" pageNumber="15" unit="km" value="240.0">240 km</quantity>
N Humaita
</locationDeviation>
on BR-319,
<date id="FFB61008FFF2FFF16022FE9B05FDF682" box="[289,418,363,389]" pageId="14" pageNumber="15" value="2018-07-11">
<collectingDate id="EFF2E9E0FFF2FFF16022FE9B05FDF682" box="[289,418,363,389]" pageId="14" pageNumber="15" value="2018-07-11">11.vii.2018</collectingDate>
</date>
; leg.
<collectorName id="26FD531EFFF2FFF160DDFE9B0642F682" box="[478,541,363,389]" pageId="14" pageNumber="15">Short</collectorName>
, forest detrital pool, BR18-0712-01A” (
<collectionCode id="ED19AE0DFFF2FFF162DEFE9B007CF682" box="[989,1059,363,389]" country="Brazil" httpUri="http://grbio.org/cool/rm88-499z" name="Instituto Nacional de Pesquisas da Amazonia" pageId="14" pageNumber="15">INPA</collectionCode>
).
</materialsCitation>
</paragraph>
</subSubSection>
<subSubSection id="C3126543FFF2FFF161C4FE7D07BDF5B9" pageId="14" pageNumber="15" type="diagnosis">
<paragraph id="8BB736C8FFF2FFF161C4FE7D0152F6EA" blockId="14.[151,1437,328,1360]" pageId="14" pageNumber="15">
<emphasis id="B97CEADAFFF2FFF161C4FE7D058CF6A0" bold="true" box="[199,467,397,423]" pageId="14" pageNumber="15">Differential Diagnosis.</emphasis>
A member of the
<taxonomicName id="4C084D4BFFF2FFF163A1FE7F073EF6AF" box="[674,865,398,424]" class="Insecta" family="Hydrochidae" genus="Hydrochus" kingdom="Animalia" order="Coleoptera" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="spanglerorum">
<emphasis id="B97CEADAFFF2FFF163A1FE7F073EF6AF" box="[674,865,398,424]" italics="true" pageId="14" pageNumber="15">H. spanglerorum</emphasis>
</taxonomicName>
species group, differentiated from the other members (
<taxonomicName id="4C084D4BFFF2FFF161D5FE4105CBF6CD" box="[214,404,432,458]" class="Insecta" family="Hydrochidae" genus="Hydrochus" kingdom="Animalia" order="Coleoptera" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="spanglerorum">
<emphasis id="B97CEADAFFF2FFF161D5FE4105CBF6CD" box="[214,404,432,458]" italics="true" pageId="14" pageNumber="15">H. spanglerorum</emphasis>
</taxonomicName>
and
<taxonomicName id="4C084D4BFFF2FFF160CAFE410615F6CD" authorityName="Perkins" authorityYear="2021" box="[457,586,432,458]" class="Insecta" family="Hydrochidae" genus="Hydrochus" kingdom="Animalia" order="Coleoptera" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="colossus">
<emphasis id="B97CEADAFFF2FFF160CAFE410615F6CD" box="[457,586,432,458]" italics="true" pageId="14" pageNumber="15">H. colossus</emphasis>
</taxonomicName>
) by the combination of slightly smaller size (ca.
<quantity id="4CF09B2DFFF2FFF16568FE41008CF6CC" box="[1131,1235,433,459]" metricMagnitude="-3" metricUnit="m" metricValue="4.23" pageId="14" pageNumber="15" unit="mm" value="4.23">4.23 mm</quantity>
), the very densely punctate dorsum, the very narrow elytral interstriae, and the male genitalia (described below,
<figureCitation id="13332A4DFFF2FFF165AEFE23015EF6EA" box="[1197,1281,467,493]" captionStart="FIGURES 24–25" captionStartId="64.[151,264,1944,1968]" captionTargetBox="[166,1426,196,1900]" captionTargetId="figure-28@64.[151,1435,181,1920]" captionTargetPageId="64" captionText="FIGURES 24–25. Habitus and male genitalia of holotypes. 24. Hydrochus accinctus n. sp. 25. Hydrochus amazonicus n. sp." figureDoi="http://doi.org/10.5281/zenodo.5043306" httpUri="https://zenodo.org/record/5043306/files/figure.png" pageId="14" pageNumber="15">Fig. 24</figureCitation>
).
</paragraph>
<paragraph id="8BB736C8FFF2FFF161C4FE0607BDF5B9" blockId="14.[151,1437,328,1360]" pageId="14" pageNumber="15">
Members of the
<taxonomicName id="4C084D4BFFF2FFF16083FE070661F517" box="[384,574,502,528]" class="Insecta" family="Hydrochidae" genus="Hydrochus" kingdom="Animalia" order="Coleoptera" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="spanglerorum">
<emphasis id="B97CEADAFFF2FFF16083FE070661F517" box="[384,574,502,528]" italics="true" pageId="14" pageNumber="15">H. spanglerorum</emphasis>
</taxonomicName>
species group are recognized by the combination of the following characteristics: 1) large size, ca. 4.20–5.10; 2) head with very convex frons disc, with deep groove on each side of tumidity; 3) legs with densely, deeply punctate femora and tibiae; 4) 3
<superScript id="7C7D9B80FFF2FFF16235FDCB071BF54E" attach="left" box="[822,836,571,585]" fontSize="6" pageId="14" pageNumber="15">rd</superScript>
and 5
<superScript id="7C7D9B80FFF2FFF1628BFDCB07CAF54E" attach="left" box="[904,917,571,585]" fontSize="6" pageId="14" pageNumber="15">th</superScript>
elytral interstriae raised, costate to subcostate, throughout length, not additionally raised at usual area of callus; 5) male genitalia robust, lacking parameres and having articulated basal orifice. Three species are currently known, all in South America:
<taxonomicName id="4C084D4BFFF2FFF16599FD710177F59D" authority="Perkins, 2021" authorityName="Perkins" authorityYear="2021" box="[1178,1320,641,666]" class="Insecta" family="Hydrochidae" genus="Hydrochus" kingdom="Animalia" order="Coleoptera" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="accinctus" status="sp. nov.">
<emphasis id="B97CEADAFFF2FFF16599FD710177F59D" box="[1178,1320,641,666]" italics="true" pageId="14" pageNumber="15">H. accinctus</emphasis>
</taxonomicName>
<emphasis id="B97CEADAFFF2FFF16432FD71012EF59C" bold="true" box="[1329,1393,641,667]" pageId="14" pageNumber="15">
<taxonomicNameLabel id="A24F57A1FFF2FFF16432FD71012EF59C" box="[1329,1393,641,667]" pageId="14" pageNumber="15" rank="species">n. sp.</taxonomicNameLabel>
</emphasis>
,
<taxonomicName id="4C084D4BFFF2FFF16482FD7105CEF5BA" authority="Perkins" authorityName="Perkins" class="Insecta" family="Hydrochidae" genus="Hydrochus" kingdom="Animalia" order="Coleoptera" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="spanglerorum">
<emphasis id="B97CEADAFFF2FFF16482FD71056CF5BA" italics="true" pageId="14" pageNumber="15">H. spanglerorum</emphasis>
Perkins
</taxonomicName>
, and
<taxonomicName id="4C084D4BFFF2FFF160CFFD540612F5BA" authority="Perkins, 2021" authorityName="Perkins" authorityYear="2021" box="[460,589,675,701]" class="Insecta" family="Hydrochidae" genus="Hydrochus" kingdom="Animalia" order="Coleoptera" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="colossus" status="sp. nov.">
<emphasis id="B97CEADAFFF2FFF160CFFD540612F5BA" box="[460,589,675,701]" italics="true" pageId="14" pageNumber="15">H. colossus</emphasis>
</taxonomicName>
<emphasis id="B97CEADAFFF2FFF16357FD5306CDF5BA" bold="true" box="[596,658,675,701]" pageId="14" pageNumber="15">
<taxonomicNameLabel id="A24F57A1FFF2FFF16357FD5306CDF5BA" box="[596,658,675,701]" pageId="14" pageNumber="15" rank="species">n. sp.</taxonomicNameLabel>
</emphasis>
(habitus
<figureCitation id="13332A4DFFF2FFF163F8FD530762F5BA" box="[763,829,675,701]" captionStart="FIGURE 1" captionStartId="6.[151,250,1943,1967]" captionTargetBox="[158,1402,188,1903]" captionTargetId="figure-28@6.[152,1435,181,1920]" captionTargetPageId="6" captionText="FIGURE 1. Dorsal habitus of Hydrochus species in study area." figureDoi="http://doi.org/10.5281/zenodo.5043263" httpUri="https://zenodo.org/record/5043263/files/figure.png" pageId="14" pageNumber="15">Fig. 1</figureCitation>
; map
<figureCitation id="13332A4DFFF2FFF16281FD53078AF5B9" box="[898,981,675,702]" captionStart="FIGURES 53–54" captionStartId="79.[151,264,1964,1988]" captionTargetBox="[218,1368,181,1941]" captionTargetId="figure-15@79.[218,1368,181,1941]" captionTargetPageId="79" captionText="FIGURES 53–54. Geographical distributions. 53. H spanglerorum species group. 54. H collaris species group." figureDoi="http://doi.org/10.5281/zenodo.5043348" httpUri="https://zenodo.org/record/5043348/files/figure.png" pageId="14" pageNumber="15">Fig. 53</figureCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="C3126543FFF2FFF161C4FD350654F22A" pageId="14" pageNumber="15" type="description">
<paragraph id="8BB736C8FFF2FFF161C4FD350081F48A" blockId="14.[151,1437,328,1360]" pageId="14" pageNumber="15">
<emphasis id="B97CEADAFFF2FFF161C4FD35050EF5D8" bold="true" box="[199,337,709,735]" pageId="14" pageNumber="15">Description</emphasis>
. Size:
<typeStatus id="54B3886AFFF2FFF160A7FD360659F5E7" box="[420,518,710,736]" pageId="14" pageNumber="15" type="holotype">holotype</typeStatus>
(length/width, mm): body (length to elytral apices) 4.23/1.60; head width 0.94; pronotum l/w 1.00/1.04; PA 0.96; PB 0.83; elytra 2.75/1.60. Habitus as illustrated (
<figureCitation id="13332A4DFFF2FFF16547FD1800C6F404" box="[1092,1177,744,771]" captionStart="FIGURES 24–25" captionStartId="64.[151,264,1944,1968]" captionTargetBox="[166,1426,196,1900]" captionTargetId="figure-28@64.[151,1435,181,1920]" captionTargetPageId="64" captionText="FIGURES 24–25. Habitus and male genitalia of holotypes. 24. Hydrochus accinctus n. sp. 25. Hydrochus amazonicus n. sp." figureDoi="http://doi.org/10.5281/zenodo.5043306" httpUri="https://zenodo.org/record/5043306/files/figure.png" pageId="14" pageNumber="15">Fig. 24</figureCitation>
). Large (ca.
<quantity id="4CF09B2DFFF2FFF16424FD1901CFF404" box="[1319,1424,745,771]" metricMagnitude="-3" metricUnit="m" metricValue="4.23" pageId="14" pageNumber="15" unit="mm" value="4.23">4.23 mm</quantity>
), elongate. Dorsum grey to very faint dull gold, with little or no iridescence. Legs dark brown except ventral surface of femora sometimes silver metallic with violet tint; all surfaces of femora densely coarsely punctate; tibiae with outer apical margin produced and bearing few short stout spines. Pronotum very densely, coarsely punctate. Elytral striae with deep round to slightly rectangular punctures; interstriae generally narrower than striae.
</paragraph>
<paragraph id="8BB736C8FFF2FFF161C4FC660591F4D5" blockId="14.[151,1437,328,1360]" pageId="14" pageNumber="15">Head densely, coarsely punctate; frons markedly raised in middle, with deep groove on each side of timidity; frontoclypeal suture absent.</paragraph>
<paragraph id="8BB736C8FFF2FFF161C4FC2C0095F33D" blockId="14.[151,1437,328,1360]" pageId="14" pageNumber="15">Pronotum wider than long (L/W as ca. 1.00/1.04), widest at about distal 2/3; anterior margin arcuate; narrowed at base; sides denticulate, sinuate; punctures on pronotum moderately sized, deep, very dense; depressions deep in anterior, central depression margined laterally with rather sharp ridge, very shallow in posterior.</paragraph>
<paragraph id="8BB736C8FFF2FFF161C4FBB300DEF3A4" blockId="14.[151,1437,328,1360]" pageId="14" pageNumber="15">
Elytra with strial punctures very deep and ca. 2–3x those on pronotum; interstriae ca. 1x width of striae; 3
<superScript id="7C7D9B80FFF2FFF16463FBB30131F356" attach="left" box="[1376,1390,1091,1105]" fontSize="6" pageId="14" pageNumber="15">rd</superScript>
and 5
<superScript id="7C7D9B80FFF2FFF161A6FB9504EDF374" attach="left" box="[165,178,1125,1139]" fontSize="6" pageId="14" pageNumber="15">th</superScript>
interstriae raised, subcostate, throughout length, not additionally raised at usual area of callus; 9
<superScript id="7C7D9B80FFF2FFF165DEFB9500B5F374" attach="left" box="[1245,1258,1125,1139]" fontSize="6" pageId="14" pageNumber="15">th</superScript>
interstria raised and overhanging 10
<superScript id="7C7D9B80FFF2FFF16075FB7805DCF391" attach="none" box="[374,387,1160,1174]" fontSize="6" pageId="14" pageNumber="15">th</superScript>
; apices truncate, with submarginal row of large, elongate punctures.
</paragraph>
<paragraph id="8BB736C8FFF2FFF161C4FB5B053DF3EF" blockId="14.[151,1437,328,1360]" pageId="14" pageNumber="15">Ventral characters: Mentum very coarsely punctate, with large central depression; submentum with two deep, transverse foveae.</paragraph>
<paragraph id="8BB736C8FFF2FFF161C4FB000654F22A" blockId="14.[151,1437,328,1360]" pageId="14" pageNumber="15">
Male genitalia (
<figureCitation id="13332A4DFFF2FFF16075FB000598F20C" box="[374,455,1264,1291]" captionStart="FIGURES 24–25" captionStartId="64.[151,264,1944,1968]" captionTargetBox="[166,1426,196,1900]" captionTargetId="figure-28@64.[151,1435,181,1920]" captionTargetPageId="64" captionText="FIGURES 24–25. Habitus and male genitalia of holotypes. 24. Hydrochus accinctus n. sp. 25. Hydrochus amazonicus n. sp." figureDoi="http://doi.org/10.5281/zenodo.5043306" httpUri="https://zenodo.org/record/5043306/files/figure.png" pageId="14" pageNumber="15">Fig. 24</figureCitation>
) general characters: genitalia large, strongly sclerotized, very asymmetrical; basal piece elongate, with articulated orifice.
</paragraph>
</subSubSection>
<subSubSection id="C3126543FFF2FFF161C4FAC60007F257" box="[199,1112,1334,1360]" pageId="14" pageNumber="15" type="etymology">
<paragraph id="8BB736C8FFF2FFF161C4FAC60007F257" blockId="14.[151,1437,328,1360]" box="[199,1112,1334,1360]" pageId="14" pageNumber="15">
<emphasis id="B97CEADAFFF2FFF161C4FAC60517F257" bold="true" box="[199,328,1334,1360]" pageId="14" pageNumber="15">Etymology</emphasis>
. Named in reference to the very densely and deeply punctate dorsum.
</paragraph>
</subSubSection>
</treatment>
</document>
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