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<document ID-DOI="http://dx.doi.org/10.3897/zookeys.1188.110081" ID-Pensoft-Pub="1313-2970-1188-125" ID-Pensoft-UUID="FD00287A8052513C815877D5359D01A1" ID-ZooBank="997ADB92AFA7497982A2B81C00EF3AEA" ModsDocID="1313-2970-1188-125" checkinTime="1704768536908" checkinUser="pensoft" docAuthor="Miller, Kelly B., Michat, Mariano C. &amp; Ferreira Jr, Nelson" docDate="2024" docId="B1DF89708AE7563692A527F84CE8C1F0" docLanguage="en" docName="ZooKeys 1188: 125-168" docOrigin="ZooKeys 1188" docPubDate="2024-01-08" docSource="http://dx.doi.org/10.3897/zookeys.1188.110081" docTitle="Megadytes parvus Miller &amp; Michat &amp; Ferreira Jr 2024, comb. nov." docType="treatment" docVersion="1" id="FD00287A8052513C815877D5359D01A1" lastPageNumber="125" masterDocId="FD00287A8052513C815877D5359D01A1" masterDocTitle="Reclassification of Cybistrinae Sharp, 1880 in the Neotropical Region (Coleoptera, Adephaga, Dytiscidae), with description of new taxa" masterLastPageNumber="168" masterPageNumber="125" pageNumber="125" updateTime="1704768536908" updateUser="pensoft">
<mods:mods id="02EE316045A3E2CFCCFF43718E90888D" xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo id="64DBBE32B2135E374441DAE3DE4D3721">
<mods:title id="5368DF8413D36AC66259F44E4DD74179">Reclassification of Cybistrinae Sharp, 1880 in the Neotropical Region (Coleoptera, Adephaga, Dytiscidae), with description of new taxa</mods:title>
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<mods:roleTerm id="378A4F681ED447DA66EDE45E17F5C779">Author</mods:roleTerm>
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<mods:namePart id="DD1A0C22A50F88C360B3C9D9581D5F7E">Miller, Kelly B.</mods:namePart>
<mods:nameIdentifier id="FCB4DFA580EAF6A08E6DE6807204AC15" type="ORCID">https://orcid.org/0009-0004-1093-4066</mods:nameIdentifier>
<mods:affiliation id="87A71645BE93FE9698427145028CBE3C">Department of Biology and Museum of Southwestern Biology, University of New Mexico, Albuquerque, NM 87131 - 0001, USA</mods:affiliation>
<mods:nameIdentifier id="281106BF1A78F8A8D42825B464837B2C" type="email">kbmiller@unm.edu</mods:nameIdentifier>
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<mods:name id="132390B0644DBD290DAB6AE4FC2AA42F" type="personal">
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<mods:namePart id="22AD08D64BD54018232B094B1EBF6B08">Michat, Mariano C.</mods:namePart>
<mods:nameIdentifier id="1236B9BED2DF78BDDCDD73A62BB7B3D3" type="ORCID">https://orcid.org/0000-0002-1962-7976</mods:nameIdentifier>
<mods:affiliation id="0435EBFDFA74732DC447ECE710FD3346">Instituto de Biodiversidad y Biologia Experimental y Aplicada, CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina</mods:affiliation>
</mods:name>
<mods:name id="F1E2BE6812D0C85C8C0208F5B7214DA2" type="personal">
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<mods:namePart id="2ECB9D9D796E5C29F3D2F2B180E4BCC1">Ferreira Jr, Nelson</mods:namePart>
<mods:nameIdentifier id="99413E0AB2E5954A542777EC78AC7679" type="ORCID">https://orcid.org/0000-0002-5932-7695</mods:nameIdentifier>
<mods:affiliation id="DA7A150E518060A3FCC5E39EA0A48815">Laboratorio de Entomologia, Departamento de Zoologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasi</mods:affiliation>
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<mods:typeOfResource id="C71687E92507F99D37858B549B6D2D57">text</mods:typeOfResource>
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<mods:title id="068164744CD4F8810B78868F726BED54">ZooKeys</mods:title>
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<mods:part id="6AD362F916B1B12E42733B2F444D349D">
<mods:date id="81882F7BEFA69FA34765653DED2693E5">2024</mods:date>
<mods:detail id="3D42270F49502C0F5D3C9E6FACB957B3" type="pubDate">
<mods:number id="83ECDBF9882FE57CE4125041829EDB0C">2024-01-08</mods:number>
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<mods:number id="1083AE2936CA6B0DED67AADC238973DA">1188</mods:number>
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<mods:start id="124294C1B892D9BB132206BEB61D0518">125</mods:start>
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<mods:classification id="3541375DBE1A4E11A66F186D7AE2255A">journal article</mods:classification>
<mods:identifier id="B8B9646219764C09C2A36C96E164CD08" type="DOI">http://dx.doi.org/10.3897/zookeys.1188.110081</mods:identifier>
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<treatment id="B1DF89708AE7563692A527F84CE8C1F0" LSID="urn:lsid:plazi:treatment:B1DF89708AE7563692A527F84CE8C1F0" httpUri="http://treatment.plazi.org/id/B1DF89708AE7563692A527F84CE8C1F0" lastPageNumber="125" pageId="0" pageNumber="125">
<subSubSection id="EB1016D5530972CA76DF23C5447F48BB" pageId="0" pageNumber="125" type="nomenclature">
<paragraph id="5DAB06374011D0C43BA5D8E27E69125E" pageId="0" pageNumber="125">
<taxonomicName id="8B4373453C5D8ED973735AB451901693" LSID="B1DF8970-8AE7-5636-92A5-27F84CE8C1F0" authority="(Tremouilles, 1984)" authorityName="Miller &amp; Michat &amp; Ferreira Jr" authorityYear="2024" baseAuthorityName="Tremouilles" baseAuthorityYear="1984" class="Insecta" family="Dytiscidae" genus="Megadytes" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Megadytes parvus" order="Coleoptera" pageId="0" pageNumber="125" phylum="Arthropoda" rank="species" species="parvus" status="comb. nov.">
Megadytes parvus (
<normalizedToken id="3327AF2922FBF1B9054B93464D7D178F" originalValue="Trémouilles">Tremouilles</normalizedToken>
, 1984)
</taxonomicName>
<taxonomicNameLabel id="FCFA2AABEE229262E83B3ED4292F2B14" pageId="0" pageNumber="125">comb. nov.</taxonomicNameLabel>
</paragraph>
</subSubSection>
<subSubSection id="0FC9D71DF547F8942DC840BAEBDB326B" pageId="0" pageNumber="125" type="description">
<paragraph id="F9E5DFFBF7AB74841E6A99A4CFD91F95" pageId="0" pageNumber="125">
<figureCitation id="CFCE474F2C4B1C2FB47C06449618D6CD" captionStart="Figures 9–14" captionStartId="F2" captionText="Figures 9 - 14. Neotropical Cybistrinae species, habitus 9 Cybister festae 10 Cybister puncticollis 11 Nilssondytes diversus 12 Megadytes parvus 13 Megadytes latus 14 species &quot; IR 57 &quot; (Ribera et al. 2008). Scale bar: 10.0 mm." figureDoi="10.3897/zookeys.1188.110081.figures9-14" httpUri="https://binary.pensoft.net/fig/963584" pageId="0" pageNumber="125">Figs 12</figureCitation>
<figureCitation id="91FD17135B024699EB5FE740C5471B06" captionStart="Figures 15–29" captionStartId="F3" captionText="Figures 15 - 29. Neotropical Cybistrinae species, metatarsal claws and tarsomere VI of males and females 15, 16 Cybister festae 17, 18 Cybister puncticollis 19, 20 Nilssondytes diversus 21, 22 Megadytes latus 23, 24 Megadytes parvus 25 species &quot; IR 57 &quot; (Ribera et al. 2008) 26, 27 Paramegadytes glaucus 28, 29 Metaxydytes fraternus. Scale bars: 1.0 mm." figureDoi="10.3897/zookeys.1188.110081.figures15-29" httpUri="https://binary.pensoft.net/fig/963585" pageId="0" pageNumber="125">, 23</figureCitation>
<figureCitation id="88E15EC83405A001135CB48BE63B80D3" captionStart="Figures 15–29" captionStartId="F3" captionText="Figures 15 - 29. Neotropical Cybistrinae species, metatarsal claws and tarsomere VI of males and females 15, 16 Cybister festae 17, 18 Cybister puncticollis 19, 20 Nilssondytes diversus 21, 22 Megadytes latus 23, 24 Megadytes parvus 25 species &quot; IR 57 &quot; (Ribera et al. 2008) 26, 27 Paramegadytes glaucus 28, 29 Metaxydytes fraternus. Scale bars: 1.0 mm." figureDoi="10.3897/zookeys.1188.110081.figures15-29" httpUri="https://binary.pensoft.net/fig/963585" pageId="0" pageNumber="125">, 24</figureCitation>
<figureCitation id="F287733C739BE4A6BBE1B381CDF49C5E" captionStart="Figures 30–50" captionStartId="F4" captionText="Figures 30 - 50. Neotropical Cybistrinae species, male genitalia 30 - 32 Cybister festae: 30 median lobe, right lateral aspect 31 median lobe, ventral aspect 32 right lateral lobe, right lateral aspect 33 - 35 Cybister puncticollis: 33 median lobe, right lateral aspect 34 median lobe, ventral aspect 35 right lateral lobe, right lateral aspect 36 - 38 Nilssondytes diversus: 36 median lobe, right lateral aspect 37 median lobe, ventral aspect 38 right lateral lobe, right lateral aspect 39 - 43 Megadytes parvus: 39 median lobe, right lateral aspect 40 median lobe, ventral aspect 41 right lateral lobe, right lateral aspect 42 apex of median lobe, right lateral aspect 43 apex of median lobe, ventral aspect 44 - 47 Megadytes latus: 44 median lobe, right lateral aspect 45 median lobe, ventral aspect 46 right lateral lobe, right lateral aspect 47 apex of median lobe, ventral aspect 48 - 50 species &quot; IR 57 &quot; (Ribera et al. 2008): 48 median lobe, right lateral aspect 49 median lobe, ventral aspect 50 right lateral lobe, right lateral aspect." figureDoi="10.3897/zookeys.1188.110081.figures30-50" httpUri="https://binary.pensoft.net/fig/963586" pageId="0" pageNumber="125">, 39-43</figureCitation>
<figureCitation id="7A4F70E75EA97BC8BF6073C3956F647E" captionStart="Figures 51–57" captionStartId="F5" captionText="Figures 51 - 57. Neotropical Cybistrinae species, male sternite IX, ventral aspect 51 Cybister festae 52 Cybister puncticollis 53 Nilssondytes diversus 54 Megadytes latus 55 Megadytes parvus 56 Paramegadytes glaucus 57 Metaxydytes fraternus. Scale bars: 1.0 mm." figureDoi="10.3897/zookeys.1188.110081.figures51-57" httpUri="https://binary.pensoft.net/fig/963587" pageId="0" pageNumber="125">, 55</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="8D277BF1D8EF2A34A4576476D31DEE3B" pageId="0" pageNumber="125" type="reference_group">
<paragraph id="ECF6AF8522322D8F79B9F3116897C95C" pageId="0" pageNumber="125">
<taxonomicName id="E631B064EA2148D07FE54B4D7F8D6315" authorityName="Miller &amp; Michat &amp; Ferreira Jr" authorityYear="2024" baseAuthorityName="Miller &amp; Michat &amp; Ferreira Jr" baseAuthorityYear="2024" class="Insecta" family="Dytiscidae" genus="Cybister" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cybister parvus" order="Coleoptera" pageId="0" pageNumber="125" phylum="Arthropoda" rank="species" species="parvus" status="comb. nov.">Cybister parvus</taxonomicName>
<normalizedToken id="EA6D72136C29EEA6042AC57963B8DAA2" originalValue="Trémouilles">Tremouilles</normalizedToken>
, 1984: 187.
</paragraph>
</subSubSection>
<subSubSection id="B56BD3EE9FD4AF32B8DE7F3B731D4345" pageId="0" pageNumber="125" type="type locality">
<paragraph id="449E56F7648CF8D9CE41FCE4F9ECCF8E" pageId="0" pageNumber="125">Type locality.</paragraph>
<paragraph id="01CF23C0E136EE1549118B11DA906B15" pageId="0" pageNumber="125">Brazil, Bahia State, Santa Rita.</paragraph>
</subSubSection>
<subSubSection id="6A62E1903747E062E1820FBCE5E28ED4" pageId="0" pageNumber="125" type="type specimens">
<paragraph id="E7ACC6C014EEEBEC5656CFC94DB00854" pageId="0" pageNumber="125">Type specimens.</paragraph>
<paragraph id="C047758A2646124980D4CAD7B3817885" pageId="0" pageNumber="125">
Holotype and nine paratypes in Museu de Zoologia, Universidade de
<normalizedToken id="EF4E52ED69BD360989AE0C9E01AC378E" originalValue="São">Sao</normalizedToken>
Paulo, Brazil and two paratypes, one male and one female, in Museo de La Plata, La Plata, Argentina.
</paragraph>
</subSubSection>
<subSubSection id="B7E966F61EE3C46574B927BEE05CFC49" pageId="0" pageNumber="125" type="diagnosis">
<paragraph id="D7366C40460C4C6BFBC525A222FE543E" pageId="0" pageNumber="125">Diagnosis.</paragraph>
<paragraph id="C361C04AA833FC004EC8CADFCE2D4888" pageId="0" pageNumber="125">
This species differs from the other species in the genus,
<taxonomicName id="902901B2B58D6ED8EF2B1C5F900E5EFA" class="Insecta" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="M. latus" order="Coleoptera" pageId="0" pageNumber="125" rank="species" species="latus">
<emphasis id="838AFBFD10849E0A8847B845151914B6" italics="true" pageId="0" pageNumber="125">M. latus</emphasis>
</taxonomicName>
, in smaller size (TL = 13.0-14.6 mm), narrower shape (TL/GW = 1.9-2.1) (Fig.
<figureCitation id="18EDEB9A79544F16D677A08F70133A2F" captionStart="Figures 9–14" captionStartId="F2" captionText="Figures 9 - 14. Neotropical Cybistrinae species, habitus 9 Cybister festae 10 Cybister puncticollis 11 Nilssondytes diversus 12 Megadytes parvus 13 Megadytes latus 14 species &quot; IR 57 &quot; (Ribera et al. 2008). Scale bar: 10.0 mm." figureDoi="10.3897/zookeys.1188.110081.figures9-14" httpUri="https://binary.pensoft.net/fig/963584" pageId="0" pageNumber="125">12</figureCitation>
) and features of the male genitalia (Figs
<figureCitation id="50279C014A028D0FD3CE9F61046FDAA2" captionStart="Figures 30–50" captionStartId="F4" captionText="Figures 30 - 50. Neotropical Cybistrinae species, male genitalia 30 - 32 Cybister festae: 30 median lobe, right lateral aspect 31 median lobe, ventral aspect 32 right lateral lobe, right lateral aspect 33 - 35 Cybister puncticollis: 33 median lobe, right lateral aspect 34 median lobe, ventral aspect 35 right lateral lobe, right lateral aspect 36 - 38 Nilssondytes diversus: 36 median lobe, right lateral aspect 37 median lobe, ventral aspect 38 right lateral lobe, right lateral aspect 39 - 43 Megadytes parvus: 39 median lobe, right lateral aspect 40 median lobe, ventral aspect 41 right lateral lobe, right lateral aspect 42 apex of median lobe, right lateral aspect 43 apex of median lobe, ventral aspect 44 - 47 Megadytes latus: 44 median lobe, right lateral aspect 45 median lobe, ventral aspect 46 right lateral lobe, right lateral aspect 47 apex of median lobe, ventral aspect 48 - 50 species &quot; IR 57 &quot; (Ribera et al. 2008): 48 median lobe, right lateral aspect 49 median lobe, ventral aspect 50 right lateral lobe, right lateral aspect." figureDoi="10.3897/zookeys.1188.110081.figures30-50" httpUri="https://binary.pensoft.net/fig/963586" pageId="0" pageNumber="125">39-43</figureCitation>
). See above under
<taxonomicName id="3E09EAA0A7536F1000A2DA003ADB66C0" class="Insecta" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="M. latus" order="Coleoptera" pageId="0" pageNumber="125" rank="species" species="latus">
<emphasis id="754E054411C7FC0D9D90B507399AE074" italics="true" pageId="0" pageNumber="125">M. latus</emphasis>
</taxonomicName>
for details about these differences between the two species.
</paragraph>
</subSubSection>
<subSubSection id="7AFD3FB1D0FC0537970E3DB6816546DD" pageId="0" pageNumber="125" type="description">
<paragraph id="868DEE7CB45460992D25168F37255D40" pageId="0" pageNumber="125">Description.</paragraph>
<paragraph id="B572961188A0823F01C059F22E9FCC6E" pageId="0" pageNumber="125">
<emphasis id="16E1C12FCAE0300177811404CA5930C4" bold="true" pageId="0" pageNumber="125">
<emphasis id="AD298448A9B76F898FDFF774B4A0AC07" italics="true" pageId="0" pageNumber="125">Measurements</emphasis>
.
</emphasis>
TL = 13.0-14.6 mm, GW = 6.2-7.7 mm, PW = 5.4-5.9 mm, HW = 3.3-3.4 mm, EW = 2.0-2.1 mm, TL/GW = 1.9-2.1, HW/EW = 1.6-1.7, WC/WV = 4.1-4.8. Body shape elongate oval, widest slightly posteriad of middle; lateral margins broadly curved, continuously curved between pronotum and elytron (Fig.
<figureCitation id="6CACC5DF54712A6FC81DACA3326D10F1" captionStart="Figures 9–14" captionStartId="F2" captionText="Figures 9 - 14. Neotropical Cybistrinae species, habitus 9 Cybister festae 10 Cybister puncticollis 11 Nilssondytes diversus 12 Megadytes parvus 13 Megadytes latus 14 species &quot; IR 57 &quot; (Ribera et al. 2008). Scale bar: 10.0 mm." figureDoi="10.3897/zookeys.1188.110081.figures9-14" httpUri="https://binary.pensoft.net/fig/963584" pageId="0" pageNumber="125">12</figureCitation>
). Depressed and somewhat flattened in lateral aspect.
</paragraph>
<paragraph id="DAB38169E1270696E3FA36AF757E7170" pageId="0" pageNumber="125">
<emphasis id="4C7A6CDD7930297D2887FE313BC946D9" bold="true" pageId="0" pageNumber="125">
<emphasis id="CCD892388B25085DB3C18E9BDED94AA9" italics="true" pageId="0" pageNumber="125">Coloration</emphasis>
.
</emphasis>
Head dark green to green-rufous throughout. Pronotum dark green with broad lateral green-rufous margins. Elytron dark green with broad lateral green-rufous margins. Ventral surfaces dark rufous.
</paragraph>
<paragraph id="3D5B7FA89A0CFA57CFCBF879119C9D8C" pageId="0" pageNumber="125">
<emphasis id="5DD5AA1CE179FD005AF51804EFBB09C4" bold="true" pageId="0" pageNumber="125">
<emphasis id="038F7F6E6EC0FF0D9FEEB4CCAD99052E" italics="true" pageId="0" pageNumber="125">Sculpture and structure</emphasis>
.
</emphasis>
Head broad, anteriorly produced, eyes prominent; dorsal surface evenly covered with extremely fine microsculpture and micropunctures. Pronotum with lateral margins evenly and broadly curved; surface similar to surface of head in microsculpture and micropunctation; pronotum somewhat swollen anteriorly. Elytron with margins very broadly curved; surface similar to surface of head in microsculpture, but with extensive, very fine micropunctation. Prosternal process anteriorly rounded, surface flat and broad, apex elongate and sharply pointed. Metaventral wing moderately broad, ~ 1/3 width of lateral portion of metacoxa; surface smooth, without sculpturing. Lateral portion of metacoxa large, broad, surface smooth, without sculpturing; metacoxal lines short, extending anteriorly less than half distance across metacoxa. Abdominal ventrites smooth, unsculptured.
</paragraph>
<paragraph id="EFBD6E6A7F810FF943B98C6E2C719675" pageId="0" pageNumber="125">
<emphasis id="62D9DC5DEE1E06D84157DF8CF23E683F" bold="true" pageId="0" pageNumber="125">
<emphasis id="C0FD98FB34FE8DB94542058E89722455" italics="true" pageId="0" pageNumber="125">Male genitalia</emphasis>
.
</emphasis>
Male median lobe in lateral aspect broad throughout, subapically somewhat expanded, apically narrowed, apex with multiple small processes (Fig.
<figureCitation id="5973E2C2199602501D12E0D01893A81D" captionStart="Figures 30–50" captionStartId="F4" captionText="Figures 30 - 50. Neotropical Cybistrinae species, male genitalia 30 - 32 Cybister festae: 30 median lobe, right lateral aspect 31 median lobe, ventral aspect 32 right lateral lobe, right lateral aspect 33 - 35 Cybister puncticollis: 33 median lobe, right lateral aspect 34 median lobe, ventral aspect 35 right lateral lobe, right lateral aspect 36 - 38 Nilssondytes diversus: 36 median lobe, right lateral aspect 37 median lobe, ventral aspect 38 right lateral lobe, right lateral aspect 39 - 43 Megadytes parvus: 39 median lobe, right lateral aspect 40 median lobe, ventral aspect 41 right lateral lobe, right lateral aspect 42 apex of median lobe, right lateral aspect 43 apex of median lobe, ventral aspect 44 - 47 Megadytes latus: 44 median lobe, right lateral aspect 45 median lobe, ventral aspect 46 right lateral lobe, right lateral aspect 47 apex of median lobe, ventral aspect 48 - 50 species &quot; IR 57 &quot; (Ribera et al. 2008): 48 median lobe, right lateral aspect 49 median lobe, ventral aspect 50 right lateral lobe, right lateral aspect." figureDoi="10.3897/zookeys.1188.110081.figures30-50" httpUri="https://binary.pensoft.net/fig/963586" pageId="0" pageNumber="125">39</figureCitation>
); in dorsal aspect moderately narrow, evenly narrowed apically, apex narrowly lobed, ventral sclerite apically broadly lobed, extending to near apex (Fig.
<figureCitation id="AA00771F60A247BA59F9CA531648C2E0" captionStart="Figures 30–50" captionStartId="F4" captionText="Figures 30 - 50. Neotropical Cybistrinae species, male genitalia 30 - 32 Cybister festae: 30 median lobe, right lateral aspect 31 median lobe, ventral aspect 32 right lateral lobe, right lateral aspect 33 - 35 Cybister puncticollis: 33 median lobe, right lateral aspect 34 median lobe, ventral aspect 35 right lateral lobe, right lateral aspect 36 - 38 Nilssondytes diversus: 36 median lobe, right lateral aspect 37 median lobe, ventral aspect 38 right lateral lobe, right lateral aspect 39 - 43 Megadytes parvus: 39 median lobe, right lateral aspect 40 median lobe, ventral aspect 41 right lateral lobe, right lateral aspect 42 apex of median lobe, right lateral aspect 43 apex of median lobe, ventral aspect 44 - 47 Megadytes latus: 44 median lobe, right lateral aspect 45 median lobe, ventral aspect 46 right lateral lobe, right lateral aspect 47 apex of median lobe, ventral aspect 48 - 50 species &quot; IR 57 &quot; (Ribera et al. 2008): 48 median lobe, right lateral aspect 49 median lobe, ventral aspect 50 right lateral lobe, right lateral aspect." figureDoi="10.3897/zookeys.1188.110081.figures30-50" httpUri="https://binary.pensoft.net/fig/963586" pageId="0" pageNumber="125">40</figureCitation>
). Lateral lobe broad throughout length, evenly curved, apex rounded, with long series of setae along ventral margin (Fig.
<figureCitation id="44AB7B09050C789FB6FAB1145A79F5B6" captionStart="Figures 30–50" captionStartId="F4" captionText="Figures 30 - 50. Neotropical Cybistrinae species, male genitalia 30 - 32 Cybister festae: 30 median lobe, right lateral aspect 31 median lobe, ventral aspect 32 right lateral lobe, right lateral aspect 33 - 35 Cybister puncticollis: 33 median lobe, right lateral aspect 34 median lobe, ventral aspect 35 right lateral lobe, right lateral aspect 36 - 38 Nilssondytes diversus: 36 median lobe, right lateral aspect 37 median lobe, ventral aspect 38 right lateral lobe, right lateral aspect 39 - 43 Megadytes parvus: 39 median lobe, right lateral aspect 40 median lobe, ventral aspect 41 right lateral lobe, right lateral aspect 42 apex of median lobe, right lateral aspect 43 apex of median lobe, ventral aspect 44 - 47 Megadytes latus: 44 median lobe, right lateral aspect 45 median lobe, ventral aspect 46 right lateral lobe, right lateral aspect 47 apex of median lobe, ventral aspect 48 - 50 species &quot; IR 57 &quot; (Ribera et al. 2008): 48 median lobe, right lateral aspect 49 median lobe, ventral aspect 50 right lateral lobe, right lateral aspect." figureDoi="10.3897/zookeys.1188.110081.figures30-50" httpUri="https://binary.pensoft.net/fig/963586" pageId="0" pageNumber="125">41</figureCitation>
).
</paragraph>
<paragraph id="D50241DB4B6464084DEEB68B71791C19" pageId="0" pageNumber="125">
<emphasis id="A0211987B3EBE29F28CC870D0273FB6A" bold="true" pageId="0" pageNumber="125">
<emphasis id="40FB4C863D935D3C46C20A0F4E7776F2" italics="true" pageId="0" pageNumber="125">Female genitalia</emphasis>
.
</emphasis>
The single female specimen available for examination lacks female genitalia which apparently have been dissected and lost.
</paragraph>
<paragraph id="50A77B19A47950EFBF17CB7B49FA8D2A" pageId="0" pageNumber="125">
<emphasis id="20B446AF46B337EA45E5AC9496955259" bold="true" pageId="0" pageNumber="125">
<emphasis id="ABC60B9A227D01FDF9150025AF55D3C4" italics="true" pageId="0" pageNumber="125">Sexual dimorphism</emphasis>
.
</emphasis>
Males have a broad protarsal palette with ventral adhesive setae with apical structures in the form of elongate flattened structures; males also have mesotarsomeres with posteroventral fields of setae. Females lack natatory setae along the ventral margins of the metatarsomeres, but these are present in males. Males and females each have unequal length metatarsal claws with the posterior shorter, but in males the posterior claw is relatively longer than in females, and distinctly, but only somewhat, shorter than the anterior (~ 4/5 of length).
</paragraph>
<paragraph id="66FF0E5BF11E3286064432FDEDFC2E09" pageId="0" pageNumber="125">
<emphasis id="ACEE132DBA15CD046C6586D9ABEC2867" bold="true" pageId="0" pageNumber="125">
<emphasis id="1115CF9E5A6074BAD6543355A5A955FE" italics="true" pageId="0" pageNumber="125">Variation</emphasis>
.
</emphasis>
Two paratype specimens were examined, a male and a female. The female has the extent and intensity of greenish-rufous coloration somewhat greater than the male, but otherwise the two specimens are similar.
</paragraph>
</subSubSection>
<subSubSection id="093C075A63E486FD4DAA7586F42C1556" pageId="0" pageNumber="125" type="distribution">
<paragraph id="00146E7C696383324F82B449636DC5AA" pageId="0" pageNumber="125">Distribution.</paragraph>
<paragraph id="12F29CFD4373C6849F0DE46EA9E530D6" pageId="0" pageNumber="125">
This species is known only from Santa Rita, Bahia State, Brazil.
<emphasis id="72A378241B5A7CDC0C0CC54908EC77D8" bold="true" pageId="0" pageNumber="125">I</emphasis>
ndication by
<bibRefCitation id="9D8D780A10E2ABB045A763612A30C74A" author="Tremouilles, ER" journalOrPublisher="Revista de la Sociedad Entomologica Argentina" pageId="0" pageNumber="125" pagination="187 - 190" refId="B37" refString="Tremouilles, ER, 1984. Notas sobre Coleoptera acuaticos Neotropicales. I. Cybister (Meganectes) parvus sp. nov. del Brasil (Coleoptera, Dytiscidae). Revista de la Sociedad Entomologica Argentina 43: 187 - 190" title="Notas sobre Coleoptera acuaticos Neotropicales. I. Cybister (Meganectes) parvus sp. nov. del Brasil (Coleoptera, Dytiscidae)." volume="43" year="1984">
<normalizedToken id="79D140476FA1363AC45DB27BE73E09B6" originalValue="Trémouilles">Tremouilles</normalizedToken>
(1984)
</bibRefCitation>
of the locality &quot;Santa Rita&quot; to Goyas State, Brazil is erroneous. In Brazil, there are several locations called Santa Rita, but in all labels of the type materials indicate &quot;Santa Rita BA&quot; in clear reference to Bahia State, Brazil (BA = abbreviation of Bahia) and not to
<normalizedToken id="BE62CD2C6C48C8903DE2F053DBF7CBB9" originalValue="Goiás">Goias</normalizedToken>
State (= GO).
<normalizedToken id="21BB2DD0147F6F648ECA9E6919114EF1" originalValue="“Goyaz”">&quot;Goyaz&quot;</normalizedToken>
is an old spelling of
<normalizedToken id="8A4B2BECB47985605BF873AEBDFF5D4D" originalValue="Goiás">Goias</normalizedToken>
State.
</paragraph>
</subSubSection>
<subSubSection id="6FBC1885206A669BBC348C2BA2ABB845" pageId="0" pageNumber="125" type="habitat">
<paragraph id="537A962986D790E486CB831B5FDA8988" pageId="0" pageNumber="125">Habitat.</paragraph>
<paragraph id="B395D12741230A6A3BE2557368174BEA" pageId="0" pageNumber="125">Nothing is known of the habitat of this species.</paragraph>
</subSubSection>
<subSubSection id="2E7AD1226DB3C98BAE339FA6C351B45B" pageId="0" pageNumber="125" type="materials_examined">
<paragraph id="EFB5EE6A45B22F0089A5742115958501" pageId="0" pageNumber="125">Material examined.</paragraph>
<paragraph id="039E161B1D0BD3D3DE1558DE71146641" pageId="0" pageNumber="125">
<materialsCitation id="6E4FD39634864E11D16FB63826BBDD7D" collectingDate="1958-04" collectorName="E. Dente, E. Tremouilles" country="Brasil" determinerName="E. R. Tremouilles" location="Brasil" specimenCount="Twelve" specimenCount-female="5" specimenCount-male="7" typeStatus="holotype">
<specimenCount id="2999236F9470A996577E222E84C29E24" count="12" type="generic">Twelve specimens</specimenCount>
in MZSP -
<typeStatus id="0DA1D92B50EB6559CF54834E6607E60E" type="holotype">holotype</typeStatus>
male and
<specimenCount id="CA63CB42AFCA0E5F5D5469F75B2DA651" count="9" type="generic" typeStatus="paratype">nine paratypes</specimenCount>
,
<specimenCount id="9C98DE26A5030C2BD48F29AE1E3DA460" count="6" type="male">six males</specimenCount>
and
<specimenCount id="7871A5882B1E3C60C28E19FF3BAEBF22" count="3" type="female">three females</specimenCount>
, each specimen labeled, &quot;Santa Rita BA -
<collectingCountry id="2630C71B48F9CC214DC7D557E7104FDA" name="Brazil">Brasil</collectingCountry>
<collectingDate id="16E1807463849853B963FE4CEFADFDBB" value="1958-04">IV.1958</collectingDate>
<collectorName id="86FE285E20C67154F292FBD162B5E02D">E. Dente</collectorName>
col. [label with black line border]/
<taxonomicName id="6F22F80F57DD2CD8C015FE1A299997B4" authorityName="Miller &amp; Michat &amp; Ferreira Jr" authorityYear="2024" baseAuthorityName="Miller &amp; Michat &amp; Ferreira Jr" baseAuthorityYear="2024" class="Insecta" family="Dytiscidae" genus="Cybister" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cybister (Cybister) parvus" order="Coleoptera" pageId="0" pageNumber="125" phylum="Arthropoda" rank="species" species="parvus" subGenus="Cybister">Cybister (Cybister) parvus</taxonomicName>
<collectorName id="D3C1FF78D20C974A94FD171825BC8A7A">E. Tremouilles</collectorName>
[handwritten] 1990 det.
<determinerName id="D45AD0D13739739F2BC25FFD503B755F">E. R. Tremouilles</determinerName>
[label with black line border]/
<taxonomicName id="C1BBC2E7E35D63A30EA8947E74C92D7C" authorityName="Miller &amp; Michat &amp; Ferreira Jr" authorityYear="2024" baseAuthorityName="Miller &amp; Michat &amp; Ferreira Jr" baseAuthorityYear="2024" class="Insecta" family="Dytiscidae" genus="Cybister" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cybister (Meganectes) parvus" order="Coleoptera" pageId="0" pageNumber="125" phylum="Arthropoda" rank="species" species="parvus" subGenus="Meganectes">Cybister (Meganectes) parvus</taxonomicName>
. 1984 Tremouilles [red label, black line border, handwritten]&quot;.
<typeStatus id="2D49AB11DC7547983EA406691EFF4D85" type="holotype">Holotype</typeStatus>
,
<specimenCount id="355BE0D583E32D518CC43AD10E4A376A" count="1" type="female" typeStatus="paratype">one paratype female</specimenCount>
and the other
<typeStatus id="0E5C77254BB0819F3AD3C78AF4B28A35" type="paratype">paratypes</typeStatus>
respectively labeled, &quot;
<typeStatus id="F15B240694D3D5D56DBC2A962AF26256" type="holotype">Holotypus</typeStatus>
[red label, black line border],
<typeStatus id="37585171C793451A91320A484D082CBC" type="holotype">Holotypus</typeStatus>
[red label, black line border],
<typeStatus id="6371E4406187D7B25036E0980C4A18D0" type="paratype">Paratypes</typeStatus>
[label with black line border]&quot;;
<specimenCount id="C03F465BE4B975DD1A7506E96CD6316B" count="2" type="generic" typeStatus="paratype">two paratypes</specimenCount>
in MLP -
<specimenCount id="B0D3BF14D2B78FE1DEB265B28E994E32" count="1" type="male">one male</specimenCount>
and
<specimenCount id="EAE133345BB8B3E1E5A074B2BA6C4C50" count="1" type="female">one female</specimenCount>
, each specimen labeled, &quot;Santa Rita BA -
<collectingCountry id="D4BD6E37D91D713419696E412A3C6A8E" name="Brazil">Brasil</collectingCountry>
<collectingDate id="EF183F5371FB438743498C66499A4A5C" value="1958-04">IV.1958</collectingDate>
<collectorName id="5271B0D00764DDE0A9A8AF56FC416963">E. Dente</collectorName>
col. [label with black line border]/
<taxonomicName id="E6570171733F55F8A8CFA19935183499" authorityName="Miller &amp; Michat &amp; Ferreira Jr" authorityYear="2024" baseAuthorityName="Miller &amp; Michat &amp; Ferreira Jr" baseAuthorityYear="2024" class="Insecta" family="Dytiscidae" genus="Cybister" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cybister (Cybister) parvus" order="Coleoptera" pageId="0" pageNumber="125" phylum="Arthropoda" rank="species" species="parvus" subGenus="Cybister">Cybister (Cybister) parvus</taxonomicName>
<collectorName id="D570EC5C555558F856DBF223B5895699">E. Tremouilles</collectorName>
[handwritten] 1990 det.
<determinerName id="B2E17F0352E52A9BD8BC49876086BAE3">E. R. Tremouilles</determinerName>
[label with black line border]/
<typeStatus id="3A8FC4111AF5D1A839200632C652B489" type="paratype">PARATYPUS</typeStatus>
/ MUSEO DE LA PLATA
<typeStatus id="87C14C51503028C5625BA310D4718AFD" type="paratype">PARATIPO</typeStatus>
<taxonomicName id="9CAB534327F5A76063463FD29E435EBB" authorityName="Miller &amp; Michat &amp; Ferreira Jr" authorityYear="2024" baseAuthorityName="Miller &amp; Michat &amp; Ferreira Jr" baseAuthorityYear="2024" class="Insecta" family="Dytiscidae" genus="Cybister" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cybister (Meganectes) parvus" order="Coleoptera" pageId="0" pageNumber="125" phylum="Arthropoda" rank="species" species="parvus" subGenus="Meganectes">Cybister (Meganectes) parvus</taxonomicName>
. 1984 Tremouilles [red label, black line border, handwritten].&quot;
</materialsCitation>
</paragraph>
</subSubSection>
</treatment>
</document>
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