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<mods:title id="6B7014064B10615F4EF7FE6F66866EE7">Reclassification of Cybistrinae Sharp, 1880 in the Neotropical Region (Coleoptera, Adephaga, Dytiscidae), with description of new taxa</mods:title>
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<mods:namePart id="8F818FA3F0C9C06EC130EB86CACB9A7B">Miller, Kelly B.</mods:namePart>
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<mods:affiliation id="E624CEEA1883E1B4B4AB9071D1C7DC60">Department of Biology and Museum of Southwestern Biology, University of New Mexico, Albuquerque, NM 87131 - 0001, USA</mods:affiliation>
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<mods:namePart id="5491F6BCEB3BD9D94084AE1EDFCF6EA7">Michat, Mariano C.</mods:namePart>
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<mods:affiliation id="F779E1B23C9CCB101F582C861B54A475">Instituto de Biodiversidad y Biologia Experimental y Aplicada, CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina</mods:affiliation>
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<mods:affiliation id="6CF4D4DC28427915E6CB3A3244576C30">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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<paragraph id="6FDDDD974F0D16F8A446E5DEEC9C73E6" pageId="0" pageNumber="125">
<taxonomicName id="A5D2BC44DCCBF546F5157701F23A20D7" ID-CoL="7SVDH" LSID="1CBDD198-956B-5EAF-9E6E-24B83A7F006D" authority="Griffini, 1895" authorityName="Griffini" authorityYear="1895" class="Insecta" family="Dytiscidae" genus="Cybister" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cybister (Neocybister) festae" order="Coleoptera" pageId="0" pageNumber="125" phylum="Arthropoda" rank="species" species="festae" subGenus="Neocybister">Cybister (Neocybister) festae Griffini, 1895</taxonomicName>
</paragraph>
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<subSubSection id="8D59C641F0B1CD53CE7C90705B6F8218" pageId="0" pageNumber="125" type="description">
<paragraph id="A5A5F5547343406A3A9DF9DE667886F4" pageId="0" pageNumber="125">
<figureCitation id="C79D6C1C38FFE64E1D82796FA3A2E3D7" captionStart="Figures 914" 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 9</figureCitation>
<figureCitation id="AC988101F245A29DD5523818162BAB28" captionStart="Figures 1529" 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">, 15</figureCitation>
<figureCitation id="40FDAD787B96C549E44EF82637043EA6" captionStart="Figures 1529" 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">, 16</figureCitation>
<figureCitation id="390F06A77DD912A94933CC6196399AED" captionStart="Figures 3050" 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">, 30-32</figureCitation>
<figureCitation id="D9374CBD3DFF883590A4C62F78C0E732" captionStart="Figures 5157" 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">, 51</figureCitation>
<figureCitation id="9BC7B34D38DA9573BB7F82D02BDE70C3" captionStart="Figures 5861" captionStartId="F6" captionText="Figures 58 - 61. Neotropical Cybistrinae species, female genitalia including left gonocoxosternite, ventral aspect, except Fig. 60 without internal genitalia 58 Cybister festae 59 Cybister puncticollis 60 Megadytes latus 61 Nilssondytes diversus. Scale bars: 1.0 mm." figureDoi="10.3897/zookeys.1188.110081.figures58-61" httpUri="https://binary.pensoft.net/fig/963588" pageId="0" pageNumber="125">, 58</figureCitation>
<figureCitation id="C5DDE2795760916A163DB0D82CF25572" captionStart="Figure 72" captionStartId="F9" captionText="Figure 72. Cybister (Neocybister) festae, lectotype male (left) and paralectotype female (right). Photograph courtesy of F. Giachino, MRSN." figureDoi="10.3897/zookeys.1188.110081.figure72" httpUri="https://binary.pensoft.net/fig/963591" pageId="0" pageNumber="125">, 72</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="93B020FC5274EB3FABB22586DBF15C43" pageId="0" pageNumber="125" type="reference_group">
<paragraph id="AAC9C077ED83FFE927CE970B42E85AD5" pageId="0" pageNumber="125">
<taxonomicName id="0EE7F698878C12303144F5E799570D64" authorityName="Griffini" authorityYear="1895" class="Insecta" family="Dytiscidae" genus="Cybister" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cybister festae" order="Coleoptera" pageId="0" pageNumber="125" phylum="Arthropoda" rank="species" species="festae">Cybister festae</taxonomicName>
Griffini, 1895: 1.
</paragraph>
<paragraph id="DA3F2C12673F783AB32702C43DECA86B" pageId="0" pageNumber="125">
<taxonomicName id="4AE2BEABB66255E748A4A9FB6A6D3478" authorityName="Griffini" authorityYear="1895" class="Insecta" family="Dytiscidae" genus="Cybister" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cybister (Meganectes) festae" order="Coleoptera" pageId="0" pageNumber="125" phylum="Arthropoda" rank="species" species="festae" subGenus="Meganectes">Cybister (Meganectes) festae</taxonomicName>
:
<bibRefCitation id="84BBA062A01E7CE3007BFCF5EFDB66FC" author="Brinck, P" journalOrPublisher="Kungliga Fysiografiska Saellskapets Handlingar" pageId="0" pageNumber="125" pagination="1 - 20" refId="B6" refString="Brinck, P, 1945. Nomenklatorische und systematische Studien ueber Dytisciden, III. Die Klassifikation der Cybisterinen. Kungliga Fysiografiska Saellskapets Handlingar 56: 1 - 20" title="Nomenklatorische und systematische Studien ueber Dytisciden, III. Die Klassifikation der Cybisterinen." volume="56" year="1945">Brinck 1945</bibRefCitation>
: 18.
</paragraph>
<paragraph id="12296DB3E59193A313229FBCEABCEA59" pageId="0" pageNumber="125">
<taxonomicName id="7ABC70C13C9D96E8F62BB1EA815B5DA0" authorityName="Griffini" authorityYear="1895" class="Insecta" family="Dytiscidae" genus="Cybister" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cybister (Neocybister) festae" order="Coleoptera" pageId="0" pageNumber="125" phylum="Arthropoda" rank="species" species="festae" subGenus="Neocybister">Cybister (Neocybister) festae</taxonomicName>
:
<bibRefCitation id="94960A8F1FEB3201F4FC84A8C04B4B0F" DOI="https://doi.org/10.1111/j.1463-6409.2006.00254.x" author="Miller, KB" journalOrPublisher="Zoologica Scripta" pageId="0" pageNumber="125" pagination="41 - 59" refId="B29" refString="Miller, KB, Bergsten, J, Whiting, MF, 2007. Phylogeny and classification of diving beetles in the tribe Cybistrini (Coleoptera, Dytiscidae, Dytiscinae). Zoologica Scripta 36 (1): 41 - 59, DOI: https://doi.org/10.1111/j.1463-6409.2006.00254.x" title="Phylogeny and classification of diving beetles in the tribe Cybistrini (Coleoptera, Dytiscidae, Dytiscinae)." url="https://doi.org/10.1111/j.1463-6409.2006.00254.x" volume="36" year="2007">Miller et al. 2007</bibRefCitation>
: 54;
<bibRefCitation id="BDB1AAF87326472A16FE428DA5EC22E1" author="Nilsson, AN" journalOrPublisher="Canadian Journal of Zoology" pageId="0" pageNumber="125" refId="B33" refString="Nilsson, AN, Hajek, J, 2023. A World Catalogue of the Family Dytiscidae, or the Diving Beetles (Coleoptera, Adephaga). 1.I.2023: 1-319." title="A World Catalogue of the Family Dytiscidae, or the Diving Beetles (Coleoptera, Adephaga). 1. I. 2023: 1 - 319." year="2023">
Nilsson and
<normalizedToken id="07182FA35E34916CEF2B6A1A20BEA648" originalValue="Hájek">Hajek</normalizedToken>
2023
</bibRefCitation>
: 84.
</paragraph>
</subSubSection>
<subSubSection id="45A999AB80E9D5702120A78AE9E2C555" pageId="0" pageNumber="125" type="type locality">
<paragraph id="AE9973F2D20902F835BF2B7456F87609" pageId="0" pageNumber="125">Type locality.</paragraph>
<paragraph id="8050E3F5AA81C76A8BC729F2C4C90B2C" pageId="0" pageNumber="125">
Panama,
<normalizedToken id="EB9D658A0F7E6C2992F2EA29FD1DF20A" originalValue="Darién">Darien</normalizedToken>
, Matusagrati Lake (Laguna della Pita).
</paragraph>
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<subSubSection id="288602D006F44E785FA080B15F89F486" pageId="0" pageNumber="125" type="type specimens">
<paragraph id="ED5D42066C86AE6E3D2907B2FDFA3B4D" pageId="0" pageNumber="125">Type specimens.</paragraph>
<paragraph id="923EC92F3FD29C3A00E3843A758A10DE" pageId="0" pageNumber="125">
The syntype specimens are in Museo Regionale di Scienze Naturali di Torino (Museum of Turin, MRSN) (Fig.
<figureCitation id="8D4A35FB6015C988D0AB8C2528BC79AB" captionStart="Figure 72" captionStartId="F9" captionText="Figure 72. Cybister (Neocybister) festae, lectotype male (left) and paralectotype female (right). Photograph courtesy of F. Giachino, MRSN." figureDoi="10.3897/zookeys.1188.110081.figure72" httpUri="https://binary.pensoft.net/fig/963591" pageId="0" pageNumber="125">72</figureCitation>
). Images of the specimens were examined (Fig.
<figureCitation id="71E795EC93DCC4F436AC0C84A06540C8" captionStart="Figure 72" captionStartId="F9" captionText="Figure 72. Cybister (Neocybister) festae, lectotype male (left) and paralectotype female (right). Photograph courtesy of F. Giachino, MRSN." figureDoi="10.3897/zookeys.1188.110081.figure72" httpUri="https://binary.pensoft.net/fig/963591" pageId="0" pageNumber="125">72</figureCitation>
, courtesy of F. Giachino, MRSN). Two specimens are included in the type series, a male and a female (Fig.
<figureCitation id="832F424BECCA875F7B66CBCBDC4EA80F" captionStart="Figure 72" captionStartId="F9" captionText="Figure 72. Cybister (Neocybister) festae, lectotype male (left) and paralectotype female (right). Photograph courtesy of F. Giachino, MRSN." figureDoi="10.3897/zookeys.1188.110081.figure72" httpUri="https://binary.pensoft.net/fig/963591" pageId="0" pageNumber="125">72</figureCitation>
;
<bibRefCitation id="3733004EA84654EB55E44D0B2C5437BA" author="Griffini, A" journalOrPublisher="Bollettino dei Musei di Zoologia ed Anatomia Comparata della Reale Universita di Torino" pageId="0" pageNumber="125" pagination="1 - 4" refId="B15" refString="Griffini, A, 1895. Nuova specie di Ditiscide raccolta nel Darien dal Dr. E. Festa. Bollettino dei Musei di Zoologia ed Anatomia Comparata della Reale Universita di Torino 10: 1 - 4" title="Nuova specie di Ditiscide raccolta nel Darien dal Dr. E. Festa." volume="10" year="1895">Griffini 1895</bibRefCitation>
). Neither are dissected. The male specimen is here designated as the lectotype to stabilize the nomenclature of the species (see Material examined below; Fig.
<figureCitation id="D26668743B2B3B350B9AEEECCF15A7DB" captionStart="Figure 72" captionStartId="F9" captionText="Figure 72. Cybister (Neocybister) festae, lectotype male (left) and paralectotype female (right). Photograph courtesy of F. Giachino, MRSN." figureDoi="10.3897/zookeys.1188.110081.figure72" httpUri="https://binary.pensoft.net/fig/963591" pageId="0" pageNumber="125">72</figureCitation>
). Although the male is not dissected and the genitalia were not examined, the specimens agree well with the others examined for this study in size, shape, coloration, distribution, and other features.
</paragraph>
</subSubSection>
<subSubSection id="28AC217A26B941C92372FE6147B01D2A" pageId="0" pageNumber="125" type="diagnosis">
<paragraph id="FFC7EC81ED6C54DFE1FFBA57584CDA00" pageId="0" pageNumber="125">Diagnosis.</paragraph>
<paragraph id="852ED93EFE8A0DF1DEE9F2D4D342137F" pageId="0" pageNumber="125">
This species differs from the other Neotropical
<taxonomicName id="2A791B2FA9BC9E42808A64B12E9DA4BF" authorityName="Curtis" authorityYear="1827" class="Insecta" family="Dytiscidae" genus="Cybister" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cybister" order="Coleoptera" pageId="0" pageNumber="125" phylum="Arthropoda" rank="genus">
<emphasis id="C7903A56B764C0AC25FF0339013CD234" italics="true" pageId="0" pageNumber="125">Cybister</emphasis>
</taxonomicName>
species,
<taxonomicName id="C8361F136CCF6D70935D80422D8AE2DE" lsidName="C. puncticollis" pageId="0" pageNumber="125" rank="species" species="puncticollis">
<emphasis id="51F3011CEEC3474CCBB48B0C0976E9E6" italics="true" pageId="0" pageNumber="125">C. puncticollis</emphasis>
</taxonomicName>
, in smaller size (TL = 20.3-21.7 mm in
<taxonomicName id="FED250F8BC41CF3832F6C17CC6B2013D" lsidName="C. festae" pageId="0" pageNumber="125" rank="species" species="festae">
<emphasis id="A698DB4FDA319FB8E8FFD471207DADC9" italics="true" pageId="0" pageNumber="125">C. festae</emphasis>
</taxonomicName>
vs. 26.6-27.6 mm in
<taxonomicName id="396A18800CA0B5DBAA66E98FC439AE79" lsidName="C. puncticollis" pageId="0" pageNumber="125" rank="species" species="puncticollis">
<emphasis id="CDC4DFA14435716110E41CC3087F7C6B" italics="true" pageId="0" pageNumber="125">C. puncticollis</emphasis>
</taxonomicName>
) and the shape of the male genitalia. The male median lobe in
<taxonomicName id="2710C8B319393836B94B0A5643E8EF09" lsidName="C. puncticollis" pageId="0" pageNumber="125" rank="species" species="puncticollis">
<emphasis id="AAF50D58306F0B85743B8B793D7287C5" italics="true" pageId="0" pageNumber="125">C. puncticollis</emphasis>
</taxonomicName>
is apically broadly expanded (Fig.
<figureCitation id="DABEF353F1C809233CFD5183354CEDCF" captionStart="Figures 3050" 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">34</figureCitation>
) whereas in
<taxonomicName id="A63F4EBDCCBAA8D47E7CBC5E709021BC" lsidName="C. festae" pageId="0" pageNumber="125" rank="species" species="festae">
<emphasis id="7E67F080D112761605E3D1D7CC39013E" italics="true" pageId="0" pageNumber="125">C. festae</emphasis>
</taxonomicName>
the median lobe is apically less strongly expanded with lateral margins that are somewhat more parallel-sided (Fig.
<figureCitation id="8D21411447399727E2B03C3CAFCE20C9" captionStart="Figures 3050" 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">31</figureCitation>
). The specimens examined match the description of
<taxonomicName id="ED6B0FB8BA431D3B162D9DAD3E32BC1F" lsidName="C. festae" pageId="0" pageNumber="125" rank="species" species="festae">
<emphasis id="834427409287269FACF4360BF7941479" italics="true" pageId="0" pageNumber="125">C. festae</emphasis>
</taxonomicName>
, but it is possible that the species illustrated and described here is not the same as
<taxonomicName id="9D28CE51904064F9EE9D298FFEA0832C" lsidName="C. festae" pageId="0" pageNumber="125" rank="species" species="festae">
<emphasis id="46FEF48FEFB058AE01F013CCC6D2682C" italics="true" pageId="0" pageNumber="125">C. festae</emphasis>
</taxonomicName>
since the lectotype (in MRSN) was not dissected.
</paragraph>
</subSubSection>
<subSubSection id="94CA62160DC557476E11F8AE9C7A88DC" pageId="0" pageNumber="125" type="description">
<paragraph id="5C2FB4E34DDEDE40D47EE9364DF04569" pageId="0" pageNumber="125">Description.</paragraph>
<paragraph id="5FF9328DFBDAD28F66A0850485D18812" pageId="0" pageNumber="125">
<emphasis id="2A55C6578D6AE5359DB4E01673107395" bold="true" pageId="0" pageNumber="125">
<emphasis id="B9A32B2A67D17B4CAB32A1D784FA143E" italics="true" pageId="0" pageNumber="125">Measurements</emphasis>
.
</emphasis>
TL = 20.3-21.7 mm, GW = 11.7-13. mm, PW = 8.8-9.2 mm, HW = 5.1-5.5 mm, EW = 2.9-3.0 mm, TL/GW = 1.7-1.8, HW/EW = 1.7-1.8, WC/WV = 4.3-4.4. Body shape oval, widest slightly posteriad of middle; lateral margins broadly curved, continuously curved between pronotum and elytron. Depressed and somewhat flattened in lateral aspect.
</paragraph>
<paragraph id="1A02D6B2A142EB5FEF8B8B0F67DC2BF2" pageId="0" pageNumber="125">
<emphasis id="67953F9DD6B72A15E467EB5603373D06" bold="true" pageId="0" pageNumber="125">
<emphasis id="83C069101F5FEED7E6DF37C2C19C7D16" italics="true" pageId="0" pageNumber="125">Coloration</emphasis>
.
</emphasis>
Head dark green-black, clypeus and labrum pale yellow. Pronotum dark green-black, with broad lateral yellow marginal band, medial margin of band distinctly delimited, band separated from posterolateral margin by narrow green strip (Fig.
<figureCitation id="0DE706AB76F00467B84AB1C27EB4787A" captionStart="Figures 914" 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">9</figureCitation>
). Elytron dark green-black with broad lateral yellow marginal band, medial margin of band distinctly delimited, lateral margin of band slightly remote from lateral elytral margin for medial portion of length, extending laterally to margin of elytron anteriorly and posteriorly, apex of yellow band diffusing into coloration of elytron (Fig.
<figureCitation id="FE5BDDB010724C7DFE7B326FD425F612" captionStart="Figures 914" 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">9</figureCitation>
). Ventral surfaces mostly black except antennae and palpi orange, pro- and mesothoracic legs with basal segments (trochanter and femur) pale orange and apical segments (tibia and tarsus) testaceous, metathoracic legs with mix of testaceous and orange, propleuron and elytral epipleuron pale orange to testaceous, and with small orange maculae laterally on abdominal ventrites IV-VI.
</paragraph>
<paragraph id="98914138E34CF8EA8697BBC622311A82" pageId="0" pageNumber="125">
<emphasis id="47DBA87A6CBA9FDC8FE9667C9D68E118" bold="true" pageId="0" pageNumber="125">
<emphasis id="601767960FDC1C30EE4FA075DEB1BFFA" italics="true" pageId="0" pageNumber="125">Sculpture and structure</emphasis>
.
</emphasis>
Head broad, anteriorly produced, eyes prominent; dorsal surface evenly covered with exceptionally fine micropunctures but appearing smooth and shiny. Pronotum with lateral margins evenly and shallowly curved; surface of pronotum similar to surface of head in micropunctation; pronotum dorsally evenly curved. Elytron with margins very broadly curved, more strongly curved posteriorly; surface similar to surface of head in micropunctation and surface appearance. Prosternal process anteriorly rounded, surface nearly flat throughout and moderately broad, apex broadly elongate and sharply pointed. Metaventral wing narrow (WC/WV = 4.3-4.4); surface smooth, with extremely fine microsculpture, shiny. Lateral portion of metacoxa large, broad, surface smooth and shiny, with extremely fine microsculpture; metacoxal lines short and strongly curved, well-incised, extending anteriorly less than half distance across metacoxa. Abdominal ventrites smooth, unsculptured.
</paragraph>
<paragraph id="AA2F8463B71C9E0266247511EF84B451" pageId="0" pageNumber="125">
<emphasis id="1A5B7A36598CEADF3DCAC5C7902D028A" bold="true" pageId="0" pageNumber="125">
<emphasis id="0C6B80A2CF7F9045A333EECD8257ADF2" italics="true" pageId="0" pageNumber="125">Male genitalia</emphasis>
.
</emphasis>
Male median lobe in lateral aspect slender throughout length, apically slender, straight, and apically pointed, dorsal sclerite slender, evenly curved basally, apically straight, and slender, (Fig.
<figureCitation id="E89A92A3F183B65A2E1650BFF64D0A2F" captionStart="Figures 3050" 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">30</figureCitation>
); in ventral aspect broad basally, laterally somewhat constricted medially, apically broadly truncate (Fig.
<figureCitation id="21B504B7556F5405799E9D8BD59ED078" captionStart="Figures 3050" 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">31</figureCitation>
). Lateral lobe slender broad basally, apically strongly narrowed and slender, with long dorsal series of setae (Fig.
<figureCitation id="1385F1D51D44C0D48ACA94128A24D172" captionStart="Figures 3050" 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">32</figureCitation>
).
</paragraph>
<paragraph id="66D4284A33FC04587AD20B3A0C8EB423" pageId="0" pageNumber="125">
<emphasis id="468088DC0496CDDDA736CA7079EF315F" bold="true" pageId="0" pageNumber="125">
<emphasis id="DF62FBDA2FEBB2B37B61B2CD2BF7E29E" italics="true" pageId="0" pageNumber="125">Female genitalia</emphasis>
(Fig.
<figureCitation id="5B0B38D6062E2C62C1F6295C53D60A25" captionStart="Figures 5861" captionStartId="F6" captionText="Figures 58 - 61. Neotropical Cybistrinae species, female genitalia including left gonocoxosternite, ventral aspect, except Fig. 60 without internal genitalia 58 Cybister festae 59 Cybister puncticollis 60 Megadytes latus 61 Nilssondytes diversus. Scale bars: 1.0 mm." figureDoi="10.3897/zookeys.1188.110081.figures58-61" httpUri="https://binary.pensoft.net/fig/963588" pageId="0" pageNumber="125">58</figureCitation>
).
</emphasis>
Gonocoxosternite moderately broad, basal portion broadly ovate; gonocoxae together knifelike, evenly convergent to apex; rami smooth, short; vagina elongate; spermatheca elongate, ~ 2/3 length of vagina.
</paragraph>
<paragraph id="C39E9F439119D3844E2D883C63EAB1DF" pageId="0" pageNumber="125">
<emphasis id="0542473ECC1E7F1FB7EC999428B81D6E" bold="true" pageId="0" pageNumber="125">
<emphasis id="8FED4318403343BAD76CC4984DE0D335" 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 spatulate surfaces; males also have mesotarsomeres with posteroventral fields of setae which are absent in females. Females lack natatory setae along the ventral margins of the metatarsomeres, but these are present in males. Males have a single metatarsal claw (the anterior, Fig.
<figureCitation id="F293C3929906C886A79EA2142FF46F6F" captionStart="Figures 1529" 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">15</figureCitation>
), whereas females have a second posterior claw that is ~ 2/3 length of the anterior, curved, and apically sharp (Fig.
<figureCitation id="26F271CBF1A80C4E38A12339486D0B94" captionStart="Figures 1529" 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">16</figureCitation>
).
</paragraph>
<paragraph id="2B85DB48870C7F1C65F952AA353743A5" pageId="0" pageNumber="125">
<emphasis id="F7543DB336E048B21664FCF9596DCA0D" bold="true" pageId="0" pageNumber="125">
<emphasis id="C9B25919B197AF48E56E3B1C59540A4A" italics="true" pageId="0" pageNumber="125">Variation</emphasis>
.
</emphasis>
Two specimens were examined, a male and a female. The female has the extent and intensity of greenish-rufous coloration somewhat greater than the male and is larger, but otherwise the two specimens are similar.
</paragraph>
</subSubSection>
<subSubSection id="562030DE8EBAD53D3923EE843FB8917B" pageId="0" pageNumber="125" type="distribution">
<paragraph id="52DCCCA082CC6F96F087BBE3EF18D380" pageId="0" pageNumber="125">Distribution.</paragraph>
<paragraph id="7ED81BBDCE4FAA8809B6F6C39D626A66" pageId="0" pageNumber="125">
This species is known from the type locality in the
<normalizedToken id="47FF28B0D26BBA2433F969BBC4CEF9AF" originalValue="Darién">Darien</normalizedToken>
in Panama (
<bibRefCitation id="4A2A174B9DD12C6BD8C83D807D261D28" author="Griffini, A" journalOrPublisher="Bollettino dei Musei di Zoologia ed Anatomia Comparata della Reale Universita di Torino" pageId="0" pageNumber="125" pagination="1 - 4" refId="B15" refString="Griffini, A, 1895. Nuova specie di Ditiscide raccolta nel Darien dal Dr. E. Festa. Bollettino dei Musei di Zoologia ed Anatomia Comparata della Reale Universita di Torino 10: 1 - 4" title="Nuova specie di Ditiscide raccolta nel Darien dal Dr. E. Festa." volume="10" year="1895">Griffini 1895</bibRefCitation>
;
<bibRefCitation id="EA1E1F9B7AF20ABFAAE23A506374D21A" author="Brinck, P" journalOrPublisher="Kungliga Fysiografiska Saellskapets Handlingar" pageId="0" pageNumber="125" pagination="1 - 20" refId="B6" refString="Brinck, P, 1945. Nomenklatorische und systematische Studien ueber Dytisciden, III. Die Klassifikation der Cybisterinen. Kungliga Fysiografiska Saellskapets Handlingar 56: 1 - 20" title="Nomenklatorische und systematische Studien ueber Dytisciden, III. Die Klassifikation der Cybisterinen." volume="56" year="1945">Brinck 1945</bibRefCitation>
) and Venezuela, Apure State (new country record).
</paragraph>
</subSubSection>
<subSubSection id="C8895BA51ED59037FB0B1B582DD91077" pageId="0" pageNumber="125" type="materials_examined">
<paragraph id="EC0691F4EE7AE5E8B0BAD908E82DDBF1" pageId="0" pageNumber="125">Material examined.</paragraph>
<paragraph id="2D2F8BEF29D80D0F3A2A4F3436238439" pageId="0" pageNumber="125">
<materialsCitation id="608AADD532CBFCF9BBCD5B7E20B6CF79" collectingDate="2024-01-01" collectingDateMax="2024-12-31" collectingDateMin="2024-01-01" country="Venezuela" latitude="7.6443334" location="Other" longLatPrecision="1" longitude="-69.300064" specimenCount="♂" specimenCount-male="1" stateProvince="Apure State" typeStatus="lectotype">
The
<typeStatus id="B337A52DF4B16AD9B54CC488DCCEA50C" type="lectotype">lectotype</typeStatus>
(here designated) in MRSN is labeled, &quot;Laguna d. Pita (Darien) [handwritten]/
<taxonomicName id="CB0C95965ED11A18B6E782AC50CB79D3" authorityName="Griffini" authorityYear="1895" class="Insecta" family="Dytiscidae" genus="Cybister" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cybister festae" order="Coleoptera" pageId="0" pageNumber="125" phylum="Arthropoda" rank="species" species="festae">Cybister festae</taxonomicName>
<specimenCount id="E89BADB8F13C27D51F44A29D6BF93E72" count="1" type="male"></specimenCount>
Griffini tipo./
<taxonomicName id="19A662D01D1B0C631D90A8CC08BF02B7" authorityName="Griffini" authorityYear="1895" class="Insecta" family="Dytiscidae" genus="Cybister" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cybister festae" order="Coleoptera" pageId="0" pageNumber="125" phylum="Arthropoda" rank="species" species="festae">Cybister festae</taxonomicName>
(tipo) Griffini Darien [green label, black line border, horizontal black lines).&quot;
<location id="ADFEE0EF0FB9815471D329E526A390A9" LSID="urn:lsid:plazi:treatment:1CBDD198956B5EAF9E6E24B83A7F006D:ADFEE0EF0FB9815471D329E526A390A9" country="Venezuela" latitude="7.6443334" longLatPrecision="1" longitude="-69.300064" name="Other" stateProvince="Apure State">Other</location>
than the type specimens (not directly examined),
<specimenCount id="674450836059A576E210279343268703" count="2" type="generic">two specimens</specimenCount>
were examined from
<collectingRegion id="93A27D0CBB690B11EF8B00DE95BBCDF4" country="Venezuela" name="Apure">Apure State</collectingRegion>
,
<locationDeviation id="23DB9557AF53AF73138970D70935F2F5" firstLocation="La Ye" secondLocation="Bruzual">between La Ye and Bruzual</locationDeviation>
,
<collectingCountry id="BCCA329C0F103CBF175E4AE1F00CAD74" name="Venezuela">Venezuela</collectingCountry>
from a roadside lake (
<geoCoordinate id="D634D333AE40D5C888685C6D7E75A1FF" degrees="7.6443333" direction="north" orientation="latitude" precision="1" value="7.6443334">7.6443333</geoCoordinate>
<geoCoordinate id="47AF9BEFAB9DC5555192D9F8C1CBA967" degrees="69.3000667" direction="west" orientation="longitude" precision="1" value="-69.300064">-69.3000667</geoCoordinate>
) (SEMC, accession numbers: SEMC0846768, SEMC0846766)
</materialsCitation>
.
</paragraph>
</subSubSection>
</treatment>
</document>