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<document ID-DOI="http://dx.doi.org/10.3897/dez.70.96994" ID-Pensoft-Pub="1860-1324-1-143" ID-Pensoft-UUID="C21F222C29BF5095A8D4A296DFDDD0E0" ID-ZooBank="12B52C903F0940939DDF2A89DB92255C" ModsDocID="1860-1324-70-1-143" checkinTime="1679703447475" checkinUser="pensoft" docAuthor="Minoshima, Yusuke N., Kamite, Yuuki &amp; Fikacek, Martin" docDate="2023" docId="42A239E73EF15A85970AA0439DCD9AD9" docLanguage="en" docName="DeutEntomolZeit 70(1): 143-157" docOrigin="Deutsche Entomologische Zeitschrift 70 (1)" docPubDate="2023-03-24" docSource="http://dx.doi.org/10.3897/dez.70.96994" docTitle="Anacaena kumejimana Minoshima &amp; Kamite &amp; Fikáček 2023, sp. nov." docType="treatment" docUuid="F4E63981-8151-4E0B-8951-4552EC89AD32" docUuidSource="ZooBank" docVersion="1" id="C21F222C29BF5095A8D4A296DFDDD0E0" lastPageNumber="143" masterDocId="C21F222C29BF5095A8D4A296DFDDD0E0" masterDocTitle="The genus Anacaena Thomson from the Ryukyu Archipelago of Japan (Coleoptera, Hydrophilidae)" masterLastPageNumber="157" masterPageNumber="143" pageNumber="143" updateTime="1679703447475" updateUser="pensoft">
<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo>
<mods:title>The genus Anacaena Thomson from the Ryukyu Archipelago of Japan (Coleoptera, Hydrophilidae)</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Minoshima, Yusuke N.</mods:namePart>
<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0002-2575-4082</mods:nameIdentifier>
<mods:affiliation>Natural History Division, Kitakyushu Museum of Natural History and Human History, 2 - 4 - 1 Higashida, Yahatahigashi-ku, Kitakyushu-shi, Fukuoka 805 - 0071, Japan</mods:affiliation>
<mods:nameIdentifier type="email">minoshima@kmnh.jp</mods:nameIdentifier>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Kamite, Yuuki</mods:namePart>
<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0002-5187-8484</mods:nameIdentifier>
<mods:affiliation>Nagoya City Public Health Research Institute, 4 - 207 Sakurazaka, Moriyama-ku, Nagoya-shi, Aichi 463 - 8585, Japan</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Fikacek, Martin</mods:namePart>
<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0002-2078-6798</mods:nameIdentifier>
<mods:affiliation>Department of Biological Sciences, National Sun Yat-sen University, No. 70 Lien-hai Rd., Kaohsiung City 80424, Taiwan &amp; National Museum, Department of Entomology, Cirkusova 1740, CZ- 19300 Prague 9, Czech Republic</mods:affiliation>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
<mods:relatedItem type="host">
<mods:titleInfo>
<mods:title>Deutsche Entomologische Zeitschrift</mods:title>
</mods:titleInfo>
<mods:part>
<mods:date>2023</mods:date>
<mods:detail type="pubDate">
<mods:number>2023-03-24</mods:number>
</mods:detail>
<mods:detail type="volume">
<mods:number>70</mods:number>
</mods:detail>
<mods:detail type="issue">
<mods:number>1</mods:number>
</mods:detail>
<mods:extent unit="page">
<mods:start>143</mods:start>
<mods:end>157</mods:end>
</mods:extent>
</mods:part>
</mods:relatedItem>
<mods:location>
<mods:url>http://dx.doi.org/10.3897/dez.70.96994</mods:url>
</mods:location>
<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">http://dx.doi.org/10.3897/dez.70.96994</mods:identifier>
<mods:identifier type="Pensoft-Pub">1860-1324-1-143</mods:identifier>
<mods:identifier type="ZooBank">12B52C903F0940939DDF2A89DB92255C</mods:identifier>
<mods:identifier type="Pensoft-UUID">C21F222C29BF5095A8D4A296DFDDD0E0</mods:identifier>
</mods:mods>
<treatment LSID="urn:lsid:zoobank.org:act:F4E63981-8151-4E0B-8951-4552EC89AD32" httpUri="http://treatment.plazi.org/id/42A239E73EF15A85970AA0439DCD9AD9" lastPageNumber="143" pageId="0" pageNumber="143">
<subSubSection pageId="0" pageNumber="143" type="nomenclature">
<paragraph pageId="0" pageNumber="143">
<taxonomicName LSID="https://zoobank.org/F4E63981-8151-4E0B-8951-4552EC89AD32" authority="Minoshima &amp; Kamite &amp; Fikáček, 2023" authorityName="Minoshima &amp; Kamite &amp; Fikáček" authorityYear="2023" class="Insecta" family="Hydrophilidae" genus="Anacaena" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anacaena kumejimana" order="Coleoptera" pageId="0" pageNumber="143" phylum="Arthropoda" rank="species" species="kumejimana" status="sp. nov.">Anacaena kumejimana</taxonomicName>
<taxonomicNameLabel pageId="0" pageNumber="143">sp. nov.</taxonomicNameLabel>
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="143" type="description">
<paragraph pageId="0" pageNumber="143">
<figureCitation captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. A-C. Anacaena kumejimana, holotype; D-F. A. torikaii, holotype (D, E) and paratype (F)." figureDoi="10.3897/dez.70.96994.figure1" httpUri="https://binary.pensoft.net/fig/829443" pageId="0" pageNumber="143">Figs 1A-C</figureCitation>
<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. A-E. Maxillary palpus; A. Anacaena kumejimana, paratype; B-D. A. okinawana, paratypes; B. from Okinawa-jima I., C, D. from Aka-jima I. (Kerama Is.); E. A. torikaii, holotype; F-I. Mentum; F. A. kumejimana, paratype; G, H. A. okinawana, paratypes; G. from Okinawa-jima I.; H. from Aka-jima I. (Kerama Is.); I. A. torikaii, holotype; J-M. Hind femora, indicating femoral pubescence but borderline of pubescence often not clear at base; J. A. kumejimana, paratype; K, L. A. okinawana, paratypes; K. from Okinawa-jima I.; L. from Aka-jima I. (Kerama I.); M. A. torikaii, holotype." figureDoi="10.3897/dez.70.96994.figure3" httpUri="https://binary.pensoft.net/fig/829445" pageId="0" pageNumber="143">, 3A, F, J</figureCitation>
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. A-F. Aedeagus (A-F) and abdominal segment 9 (G), dorsal view. A. Anacaena kumejimana, holotype; B. A. torikaii, holotype; C-G. A. okinawana, holotype (C) and paratypes (D-G); C, D, G. from Okinawa-jima I.; E, F. from Kerama Is. (E. Aka-jima I.; F. Zamami-jima I.)." figureDoi="10.3897/dez.70.96994.figure4" httpUri="https://binary.pensoft.net/fig/829446" pageId="0" pageNumber="143">, 4A</figureCitation>
<figureCitation captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Map of the Central Ryukyus (Amami Is. to Okinawa Is.) and aedeagus of Anacaena species. A-G. Anacaena okinawana; A-C. from Okinawa-jima I., D-G. from Kerama Is. (D, E. Aka-jima I.; F. Geruma-jima I.; G. Zamami-jima I.); H, I. A. kumejimana." figureDoi="10.3897/dez.70.96994.figure5" httpUri="https://binary.pensoft.net/fig/829447" pageId="0" pageNumber="143">, 5H, I</figureCitation>
<figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Collecting localities of the species of Anacaena on the Ryukyu Archipelago. A-B. Anacaena kumejimana; A. Daruma-yama, Kumejima I., 21 May 2007; B. Nakandakari, Kumejima I., 20 May 2007; C-E. A. okinawana; C. tributary of Benoki Dam, Kunigami-son, Okinawa-jima I., 26 Jul. 2015; D. Aka, Aka-jima I., 15 Mar. 2019; E. Geruma, Geruma-jima I., 15 Mar. 2019, after Kamite et al. (2019); F. A. torikaii; F, Kinsakubaru, Amami-oshima I., 17 Jul. 2006." figureDoi="10.3897/dez.70.96994.figure6" httpUri="https://binary.pensoft.net/fig/829448" pageId="0" pageNumber="143">, 6A, B</figureCitation>
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="143" type="type locality">
<paragraph pageId="0" pageNumber="143">Type locality.</paragraph>
<paragraph pageId="0" pageNumber="143">Japan, Okinawa-ken (Prefecture), Kumejima I., Suhara.</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="143" type="type series">
<paragraph pageId="0" pageNumber="143">Type series.</paragraph>
<paragraph pageId="0" pageNumber="143">
<emphasis bold="true" italics="true" pageId="0" pageNumber="143">Holotype</emphasis>
: Japan • male; &quot;KUMEJIMA JPN&quot; /
<normalizedToken originalValue="“Suhara”">&quot;Suhara&quot;</normalizedToken>
/
<normalizedToken originalValue="“Kumejima-chô”">&quot;Kumejima-cho&quot;</normalizedToken>
// &quot;19. V. 2007&quot; / &quot;Y. Kamite leg.&quot; //
<normalizedToken originalValue="“spec.#”">&quot;spec.#&quot;</normalizedToken>
/
<normalizedToken originalValue="“20-138”">&quot;20-138&quot;</normalizedToken>
//
<normalizedToken originalValue="“HOLOTYPE”">&quot;HOLOTYPE&quot;</normalizedToken>
/
<normalizedToken originalValue="“ANACAENA”">&quot;ANACAENA&quot;</normalizedToken>
/
<normalizedToken originalValue="“kumejimana”">&quot;kumejimana&quot;</normalizedToken>
/ &quot;des. YN Minoshima 2021&quot;; KMNH.
<emphasis bold="true" italics="true" pageId="0" pageNumber="143">Paratypes</emphasis>
: Japan -
<emphasis bold="true" pageId="0" pageNumber="143">Okinawa Pref., Kumejima I.</emphasis>
• 1 male, 2 females, 2 exs; same collection data as holotype; KMNH, YKC • 1 ex.; Daruma-yama; 21 May 2007; Y. Kamite leg.; YKC • 1 ex.; Nakandakari; 20 May 2007; Y. Kamite leg.; YKC • 1 ex.;
<normalizedToken originalValue="Shirase-gawa-jôryû">Shirase-gawa-joryu</normalizedToken>
(upstream of Shirase-gawa R.); 19 May 2007; Y. Kamite leg.; YKC.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="143" type="diagnosis">
<paragraph pageId="0" pageNumber="143">Diagnosis.</paragraph>
<paragraph pageId="0" pageNumber="143">Pronotum dark brown to black, with broad yellowish lateral margin. Antenna with eight antennomeres; antennomere 3 narrow. Maxillary palpus yellowish with very slightly infuscate apex. Pronotum with very fine and sparsely distributed ground punctation consisting of uniformly-sized punctures. Elytra with yellowish spot around scutellar shield. Metafemoral pubescence with horizontal hairline. Median lobe wide, elongate triangular with narrow basal apophyses. Gonopore large, situated at apex. Parameres widest in basal half, then slightly attenuated apically, rounded apically with weak inner angle. Lateral margin of paramere weakly sinuate in dorsal view. Phallobase as long as or slightly shorter than paramere, nearly parallel-sided in basal half, then narrowing to somewhat narrow and short manubrium.</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="143" type="differential diagnosis">
<paragraph pageId="0" pageNumber="143">Differential diagnosis.</paragraph>
<paragraph pageId="0" pageNumber="143">
This species is similar to
<taxonomicName lsidName="A. okinawana" pageId="0" pageNumber="143" rank="species" species="okinawana">
<emphasis italics="true" pageId="0" pageNumber="143">A. okinawana</emphasis>
</taxonomicName>
and
<taxonomicName lsidName="A. torikaii" pageId="0" pageNumber="143" rank="species" species="torikaii">
<emphasis italics="true" pageId="0" pageNumber="143">A. torikaii</emphasis>
</taxonomicName>
in size and external features. Based on the observation of specimens available in this study, dorsal colouration of pronotum and elytra (Fig.
<figureCitation captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. A-C. Anacaena kumejimana, holotype; D-F. A. torikaii, holotype (D, E) and paratype (F)." figureDoi="10.3897/dez.70.96994.figure1" httpUri="https://binary.pensoft.net/fig/829443" pageId="0" pageNumber="143">1C</figureCitation>
) and aedeagus morphology (Fig.
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. A-F. Aedeagus (A-F) and abdominal segment 9 (G), dorsal view. A. Anacaena kumejimana, holotype; B. A. torikaii, holotype; C-G. A. okinawana, holotype (C) and paratypes (D-G); C, D, G. from Okinawa-jima I.; E, F. from Kerama Is. (E. Aka-jima I.; F. Zamami-jima I.)." figureDoi="10.3897/dez.70.96994.figure4" httpUri="https://binary.pensoft.net/fig/829446" pageId="0" pageNumber="143">4A</figureCitation>
) separate these species.
</paragraph>
<caption doi="10.3897/dez.70.96994.figure1" httpUri="https://binary.pensoft.net/fig/829443" pageId="0" pageNumber="143" start="Figure 1" startId="F1">
<paragraph pageId="0" pageNumber="143">
<emphasis bold="true" pageId="0" pageNumber="143">Figure 1.</emphasis>
<emphasis bold="true" pageId="0" pageNumber="143">A-C.</emphasis>
<taxonomicName authorityName="Minoshima &amp; Kamite &amp; Fikáček" authorityYear="2023" class="Insecta" family="Hydrophilidae" genus="Anacaena" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anacaena kumejimana" order="Coleoptera" pageId="0" pageNumber="143" phylum="Arthropoda" rank="species" species="kumejimana">
<emphasis italics="true" pageId="0" pageNumber="143">Anacaena kumejimana</emphasis>
</taxonomicName>
, holotype;
<emphasis bold="true" pageId="0" pageNumber="143">D-F.</emphasis>
<taxonomicName lsidName="A. torikaii" pageId="0" pageNumber="143" rank="species" species="torikaii">
<emphasis italics="true" pageId="0" pageNumber="143">A. torikaii</emphasis>
</taxonomicName>
, holotype (
<emphasis bold="true" pageId="0" pageNumber="143">D, E</emphasis>
) and paratype (
<emphasis bold="true" pageId="0" pageNumber="143">F</emphasis>
).
</paragraph>
</caption>
<paragraph pageId="0" pageNumber="143">
<taxonomicName authorityName="Minoshima &amp; Kamite &amp; Fikáček" authorityYear="2023" class="Insecta" family="Hydrophilidae" genus="Anacaena" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anacaena kumejimana" order="Coleoptera" pageId="0" pageNumber="143" phylum="Arthropoda" rank="species" species="kumejimana">
<emphasis italics="true" pageId="0" pageNumber="143">Anacaena kumejimana</emphasis>
</taxonomicName>
has a light yellow spot on the proximal medial portion of each elytron (Fig.
<figureCitation captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. A-C. Anacaena kumejimana, holotype; D-F. A. torikaii, holotype (D, E) and paratype (F)." figureDoi="10.3897/dez.70.96994.figure1" httpUri="https://binary.pensoft.net/fig/829443" pageId="0" pageNumber="143">1C</figureCitation>
), whereas
<taxonomicName lsidName="A. okinawana" pageId="0" pageNumber="143" rank="species" species="okinawana">
<emphasis italics="true" pageId="0" pageNumber="143">A. okinawana</emphasis>
</taxonomicName>
does not have such distinct spot (the proximal areas may be only indistinctly paler) and
<taxonomicName lsidName="A. kumejimana" pageId="0" pageNumber="143" rank="species" species="kumejimana">
<emphasis italics="true" pageId="0" pageNumber="143">A. kumejimana</emphasis>
</taxonomicName>
has a broader yellowish margin of the pronotum than
<taxonomicName lsidName="A. okinawana" pageId="0" pageNumber="143" rank="species" species="okinawana">
<emphasis italics="true" pageId="0" pageNumber="143">A. okinawana</emphasis>
</taxonomicName>
(Fig.
<figureCitation captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. A-C. Anacaena kumejimana, holotype; D-F. A. torikaii, holotype (D, E) and paratype (F)." figureDoi="10.3897/dez.70.96994.figure1" httpUri="https://binary.pensoft.net/fig/829443" pageId="0" pageNumber="143">1A, C</figureCitation>
). Lateral face of parameres is convex in the basal third in
<taxonomicName lsidName="A. kumejimana" pageId="0" pageNumber="143" rank="species" species="kumejimana">
<emphasis italics="true" pageId="0" pageNumber="143">A. kumejimana</emphasis>
</taxonomicName>
(Fig.
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. A-F. Aedeagus (A-F) and abdominal segment 9 (G), dorsal view. A. Anacaena kumejimana, holotype; B. A. torikaii, holotype; C-G. A. okinawana, holotype (C) and paratypes (D-G); C, D, G. from Okinawa-jima I.; E, F. from Kerama Is. (E. Aka-jima I.; F. Zamami-jima I.)." figureDoi="10.3897/dez.70.96994.figure4" httpUri="https://binary.pensoft.net/fig/829446" pageId="0" pageNumber="143">4A</figureCitation>
), whereas convexity is restricted to the more basal portion in
<taxonomicName lsidName="A. okinawana" pageId="0" pageNumber="143" rank="species" species="okinawana">
<emphasis italics="true" pageId="0" pageNumber="143">A. okinawana</emphasis>
</taxonomicName>
(Fig.
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. A-F. Aedeagus (A-F) and abdominal segment 9 (G), dorsal view. A. Anacaena kumejimana, holotype; B. A. torikaii, holotype; C-G. A. okinawana, holotype (C) and paratypes (D-G); C, D, G. from Okinawa-jima I.; E, F. from Kerama Is. (E. Aka-jima I.; F. Zamami-jima I.)." figureDoi="10.3897/dez.70.96994.figure4" httpUri="https://binary.pensoft.net/fig/829446" pageId="0" pageNumber="143">4C-F</figureCitation>
). This results in a different lateral margin of the lateral face of the paramere in dorsal view. Wide median lobe separate
<taxonomicName lsidName="A. kumejimana" pageId="0" pageNumber="143" rank="species" species="kumejimana">
<emphasis italics="true" pageId="0" pageNumber="143">A. kumejimana</emphasis>
</taxonomicName>
(Fig.
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. A-F. Aedeagus (A-F) and abdominal segment 9 (G), dorsal view. A. Anacaena kumejimana, holotype; B. A. torikaii, holotype; C-G. A. okinawana, holotype (C) and paratypes (D-G); C, D, G. from Okinawa-jima I.; E, F. from Kerama Is. (E. Aka-jima I.; F. Zamami-jima I.)." figureDoi="10.3897/dez.70.96994.figure4" httpUri="https://binary.pensoft.net/fig/829446" pageId="0" pageNumber="143">4A</figureCitation>
) and
<taxonomicName lsidName="A. okinawana" pageId="0" pageNumber="143" rank="species" species="okinawana">
<emphasis italics="true" pageId="0" pageNumber="143">A. okinawana</emphasis>
</taxonomicName>
(Fig.
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. A-F. Aedeagus (A-F) and abdominal segment 9 (G), dorsal view. A. Anacaena kumejimana, holotype; B. A. torikaii, holotype; C-G. A. okinawana, holotype (C) and paratypes (D-G); C, D, G. from Okinawa-jima I.; E, F. from Kerama Is. (E. Aka-jima I.; F. Zamami-jima I.)." figureDoi="10.3897/dez.70.96994.figure4" httpUri="https://binary.pensoft.net/fig/829446" pageId="0" pageNumber="143">4C-F</figureCitation>
) from
<taxonomicName lsidName="A. torikaii" pageId="0" pageNumber="143" rank="species" species="torikaii">
<emphasis italics="true" pageId="0" pageNumber="143">A. torikaii</emphasis>
</taxonomicName>
(Fig.
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. A-F. Aedeagus (A-F) and abdominal segment 9 (G), dorsal view. A. Anacaena kumejimana, holotype; B. A. torikaii, holotype; C-G. A. okinawana, holotype (C) and paratypes (D-G); C, D, G. from Okinawa-jima I.; E, F. from Kerama Is. (E. Aka-jima I.; F. Zamami-jima I.)." figureDoi="10.3897/dez.70.96994.figure4" httpUri="https://binary.pensoft.net/fig/829446" pageId="0" pageNumber="143">4B</figureCitation>
). The median lobe is nearly as long as parameres in
<taxonomicName lsidName="A. kumejimana" pageId="0" pageNumber="143" rank="species" species="kumejimana">
<emphasis italics="true" pageId="0" pageNumber="143">A. kumejimana</emphasis>
</taxonomicName>
(Fig.
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. A-F. Aedeagus (A-F) and abdominal segment 9 (G), dorsal view. A. Anacaena kumejimana, holotype; B. A. torikaii, holotype; C-G. A. okinawana, holotype (C) and paratypes (D-G); C, D, G. from Okinawa-jima I.; E, F. from Kerama Is. (E. Aka-jima I.; F. Zamami-jima I.)." figureDoi="10.3897/dez.70.96994.figure4" httpUri="https://binary.pensoft.net/fig/829446" pageId="0" pageNumber="143">4A</figureCitation>
), whereas slightly longer than the parameres in
<taxonomicName lsidName="A. okinawana" pageId="0" pageNumber="143" rank="species" species="okinawana">
<emphasis italics="true" pageId="0" pageNumber="143">A. okinawana</emphasis>
</taxonomicName>
(Fig.
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. A-F. Aedeagus (A-F) and abdominal segment 9 (G), dorsal view. A. Anacaena kumejimana, holotype; B. A. torikaii, holotype; C-G. A. okinawana, holotype (C) and paratypes (D-G); C, D, G. from Okinawa-jima I.; E, F. from Kerama Is. (E. Aka-jima I.; F. Zamami-jima I.)." figureDoi="10.3897/dez.70.96994.figure4" httpUri="https://binary.pensoft.net/fig/829446" pageId="0" pageNumber="143">4C-F</figureCitation>
); the apex of the median lobe is reaching close to the parameral apices in
<taxonomicName lsidName="A. okinawana" pageId="0" pageNumber="143" rank="species" species="okinawana">
<emphasis italics="true" pageId="0" pageNumber="143">A. okinawana</emphasis>
</taxonomicName>
.
</paragraph>
<paragraph pageId="0" pageNumber="143">
<taxonomicName authorityName="Orchymont" authorityYear="1942" class="Insecta" family="Hydrophilidae" genus="Anacaena" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anacaena yunnanensis" order="Coleoptera" pageId="0" pageNumber="143" phylum="Arthropoda" rank="species" species="yunnanensis">
<emphasis italics="true" pageId="0" pageNumber="143">Anacaena yunnanensis</emphasis>
</taxonomicName>
Orchymont, 1942 (the
<taxonomicName lsidName="A. yunnanensis" pageId="0" pageNumber="143" rank="species" species="yunnanensis">
<emphasis italics="true" pageId="0" pageNumber="143">A. yunnanensis</emphasis>
</taxonomicName>
-group sensu
<bibRefCitation author="Komarek, A" journalOrPublisher="Koleopterologische Rundschau" pageId="0" pageNumber="143" pagination="235 - 284" refId="B29" refString="Komarek, A, 2012. Taxonomic revision of Anacaena Thomson, 1859 IX. The People's Republic of China (Coleoptera: Hydrophilidae). Koleopterologische Rundschau 82: 235 - 284" title="Taxonomic revision of Anacaena Thomson, 1859 IX. The People's Republic of China (Coleoptera: Hydrophilidae)." volume="82" year="2012">Komarek 2012</bibRefCitation>
) known from China and
<taxonomicName lsidName="A. zamboangana" pageId="0" pageNumber="143" rank="species" species="zamboangana">
<emphasis italics="true" pageId="0" pageNumber="143">A. zamboangana</emphasis>
</taxonomicName>
Komarek &amp; Freitag, 2014 from Mindanao I., the Philippines, seem to be similar to
<taxonomicName lsidName="A. kumejimana" pageId="0" pageNumber="143" rank="species" species="kumejimana">
<emphasis italics="true" pageId="0" pageNumber="143">A. kumejimana</emphasis>
</taxonomicName>
(
<bibRefCitation author="Komarek, A" journalOrPublisher="Koleopterologische Rundschau" pageId="0" pageNumber="143" pagination="235 - 284" refId="B29" refString="Komarek, A, 2012. Taxonomic revision of Anacaena Thomson, 1859 IX. The People's Republic of China (Coleoptera: Hydrophilidae). Koleopterologische Rundschau 82: 235 - 284" title="Taxonomic revision of Anacaena Thomson, 1859 IX. The People's Republic of China (Coleoptera: Hydrophilidae)." volume="82" year="2012">Komarek 2012</bibRefCitation>
;
<bibRefCitation author="Komarek, A" journalOrPublisher="Koleopterologische Rundschau" pageId="0" pageNumber="143" pagination="235 - 276" refId="B35" refString="Komarek, A, Freitag, H, 2014. Revision of Anacaena Thomson, 1859 XI. Republic of the Philippines (Coleoptera: Hydrophilidae). Koleopterologische Rundschau 84: 235 - 276" title="Revision of Anacaena Thomson, 1859 XI. Republic of the Philippines (Coleoptera: Hydrophilidae)." volume="84" year="2014">Komarek and Freitag 2014</bibRefCitation>
), but the extent of the metafemoral pubescence separate the Ryukyu species: it has a horizontal borderline (Fig.
<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. A-E. Maxillary palpus; A. Anacaena kumejimana, paratype; B-D. A. okinawana, paratypes; B. from Okinawa-jima I., C, D. from Aka-jima I. (Kerama Is.); E. A. torikaii, holotype; F-I. Mentum; F. A. kumejimana, paratype; G, H. A. okinawana, paratypes; G. from Okinawa-jima I.; H. from Aka-jima I. (Kerama Is.); I. A. torikaii, holotype; J-M. Hind femora, indicating femoral pubescence but borderline of pubescence often not clear at base; J. A. kumejimana, paratype; K, L. A. okinawana, paratypes; K. from Okinawa-jima I.; L. from Aka-jima I. (Kerama I.); M. A. torikaii, holotype." figureDoi="10.3897/dez.70.96994.figure3" httpUri="https://binary.pensoft.net/fig/829445" pageId="0" pageNumber="143">3J</figureCitation>
), compared to rounded borderline in the Chinese and Philippine species (e.g., fig. 99 in
<bibRefCitation author="Komarek, A" journalOrPublisher="Koleopterologische Rundschau" pageId="0" pageNumber="143" pagination="235 - 284" refId="B29" refString="Komarek, A, 2012. Taxonomic revision of Anacaena Thomson, 1859 IX. The People's Republic of China (Coleoptera: Hydrophilidae). Koleopterologische Rundschau 82: 235 - 284" title="Taxonomic revision of Anacaena Thomson, 1859 IX. The People's Republic of China (Coleoptera: Hydrophilidae)." volume="82" year="2012">Komarek 2012</bibRefCitation>
, 72 in
<bibRefCitation author="Komarek, A" journalOrPublisher="Koleopterologische Rundschau" pageId="0" pageNumber="143" pagination="235 - 276" refId="B35" refString="Komarek, A, Freitag, H, 2014. Revision of Anacaena Thomson, 1859 XI. Republic of the Philippines (Coleoptera: Hydrophilidae). Koleopterologische Rundschau 84: 235 - 276" title="Revision of Anacaena Thomson, 1859 XI. Republic of the Philippines (Coleoptera: Hydrophilidae)." volume="84" year="2014">Komarek and Freitag 2014</bibRefCitation>
).
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="143" type="description">
<paragraph pageId="0" pageNumber="143">Description.</paragraph>
<paragraph pageId="0" pageNumber="143">
<emphasis bold="true" italics="true" pageId="0" pageNumber="143">Body</emphasis>
2.1-2.3 mm in length, oval, slightly attenuated posteriad (Fig.
<figureCitation captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. A-C. Anacaena kumejimana, holotype; D-F. A. torikaii, holotype (D, E) and paratype (F)." figureDoi="10.3897/dez.70.96994.figure1" httpUri="https://binary.pensoft.net/fig/829443" pageId="0" pageNumber="143">1C</figureCitation>
).
<emphasis bold="true" italics="true" pageId="0" pageNumber="143">Colour</emphasis>
(Fig.
<figureCitation captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. A-C. Anacaena kumejimana, holotype; D-F. A. torikaii, holotype (D, E) and paratype (F)." figureDoi="10.3897/dez.70.96994.figure1" httpUri="https://binary.pensoft.net/fig/829443" pageId="0" pageNumber="143">1A-C</figureCitation>
). Head black, lateral part of clypeus yellowish. Pronotum and elytra dark brown; margins of pronotum broadly yellowish; elytra with yellowish patch at anteromesal part around scutellar shield. Ventral face dark brown, legs slightly paler. Maxillary palpus yellowish with very slightly infuscate apex.
</paragraph>
<paragraph pageId="0" pageNumber="143">
<emphasis bold="true" pageId="0" pageNumber="143">
<emphasis italics="true" pageId="0" pageNumber="143">Head</emphasis>
.
</emphasis>
Labrum with a fringe of long erect setae. Ground puncture of clypeus and frons fine, densely arranged; interspace between punctures ca. 2-4 times the width of a puncture. Presence of fine setae on clypeus ambiguous (possibly already broken when collected or during preparation). Frontoclypeal sulcus indistinct. Systematic punctures on clypeus and frons slightly larger than ground punctures, each bearing a fine seta. Systematic punctures of clypeus sparsely distributed. Systematic punctures of frons on anterolateral and posterolateral parts close to compound eye and frontoclypeal sulcus.
</paragraph>
<paragraph pageId="0" pageNumber="143">
Antenna with eight antennomeres. Scape stout, moderately long. Antennomere 2 stout, somewhat conical, ca. as long as antennomeres 3 and 4 combined; antennomere 3 narrow; antennomere 4 wider than 3; antennal club longer than antennomeres 2-5 combined. Maxillary palpus short (Fig.
<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. A-E. Maxillary palpus; A. Anacaena kumejimana, paratype; B-D. A. okinawana, paratypes; B. from Okinawa-jima I., C, D. from Aka-jima I. (Kerama Is.); E. A. torikaii, holotype; F-I. Mentum; F. A. kumejimana, paratype; G, H. A. okinawana, paratypes; G. from Okinawa-jima I.; H. from Aka-jima I. (Kerama Is.); I. A. torikaii, holotype; J-M. Hind femora, indicating femoral pubescence but borderline of pubescence often not clear at base; J. A. kumejimana, paratype; K, L. A. okinawana, paratypes; K. from Okinawa-jima I.; L. from Aka-jima I. (Kerama I.); M. A. torikaii, holotype." figureDoi="10.3897/dez.70.96994.figure3" httpUri="https://binary.pensoft.net/fig/829445" pageId="0" pageNumber="143">3A</figureCitation>
); palpomere 2 stout, longer than palpomere 3; palpomere 3 short, about half as long as palpomere 4; palpomere 4 longest, shorter than palpomeres 2 and 3 combined. Labial palpus short, shorter than width of mentum. Mentum ca. 1.7 times wider than long, subtrapezoidal, rounded anteriorly with median depression; lateral margin with lateral angle but generally indistinct (this character was observed without dissection of head appendages, thus not very accurate) (Fig.
<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. A-E. Maxillary palpus; A. Anacaena kumejimana, paratype; B-D. A. okinawana, paratypes; B. from Okinawa-jima I., C, D. from Aka-jima I. (Kerama Is.); E. A. torikaii, holotype; F-I. Mentum; F. A. kumejimana, paratype; G, H. A. okinawana, paratypes; G. from Okinawa-jima I.; H. from Aka-jima I. (Kerama Is.); I. A. torikaii, holotype; J-M. Hind femora, indicating femoral pubescence but borderline of pubescence often not clear at base; J. A. kumejimana, paratype; K, L. A. okinawana, paratypes; K. from Okinawa-jima I.; L. from Aka-jima I. (Kerama I.); M. A. torikaii, holotype." figureDoi="10.3897/dez.70.96994.figure3" httpUri="https://binary.pensoft.net/fig/829445" pageId="0" pageNumber="143">3F</figureCitation>
). Ground punctation on mentum fine, rather sparsely distributed. Lateral margin of mentum with fringe of fine setae.
</paragraph>
<paragraph pageId="0" pageNumber="143">
<emphasis bold="true" pageId="0" pageNumber="143">
<emphasis italics="true" pageId="0" pageNumber="143">Thorax</emphasis>
.
</emphasis>
Pronotum with very fine and sparsely distributed ground punctation consisting of uniformly sized punctures. Systematic punctures on pronotum arranged as irregular transverse row along anterolateral and posterolateral areas. Prosternum weakly and evenly convex.
</paragraph>
<paragraph pageId="0" pageNumber="143">Ground punctation on elytra coarser than that of head and pronotum; punctures rather densely distributed; interspaces between punctures ca. 1-3 times the width of a puncture. Mesoventrite with median process pointed apically; process as subtrigonal pyramid with posterior transverse and anterior median longitudinal carinas. Metaventrite with inverted triangular elevated portion medially, with small, oval, postero-medial glabrous area.</paragraph>
<paragraph pageId="0" pageNumber="143">
Metafemora pubescent in anterior half of basal portion (Fig.
<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. A-E. Maxillary palpus; A. Anacaena kumejimana, paratype; B-D. A. okinawana, paratypes; B. from Okinawa-jima I., C, D. from Aka-jima I. (Kerama Is.); E. A. torikaii, holotype; F-I. Mentum; F. A. kumejimana, paratype; G, H. A. okinawana, paratypes; G. from Okinawa-jima I.; H. from Aka-jima I. (Kerama Is.); I. A. torikaii, holotype; J-M. Hind femora, indicating femoral pubescence but borderline of pubescence often not clear at base; J. A. kumejimana, paratype; K, L. A. okinawana, paratypes; K. from Okinawa-jima I.; L. from Aka-jima I. (Kerama I.); M. A. torikaii, holotype." figureDoi="10.3897/dez.70.96994.figure3" httpUri="https://binary.pensoft.net/fig/829445" pageId="0" pageNumber="143">3J</figureCitation>
), excluding apical area; hairline indistinct along basal part.
</paragraph>
<paragraph pageId="0" pageNumber="143">
<emphasis bold="true" pageId="0" pageNumber="143">
<emphasis italics="true" pageId="0" pageNumber="143">Abdomen</emphasis>
.
</emphasis>
Aedeagus (Fig.
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. A-F. Aedeagus (A-F) and abdominal segment 9 (G), dorsal view. A. Anacaena kumejimana, holotype; B. A. torikaii, holotype; C-G. A. okinawana, holotype (C) and paratypes (D-G); C, D, G. from Okinawa-jima I.; E, F. from Kerama Is. (E. Aka-jima I.; F. Zamami-jima I.)." figureDoi="10.3897/dez.70.96994.figure4" httpUri="https://binary.pensoft.net/fig/829446" pageId="0" pageNumber="143">4A</figureCitation>
; see also Fig.
<figureCitation captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Map of the Central Ryukyus (Amami Is. to Okinawa Is.) and aedeagus of Anacaena species. A-G. Anacaena okinawana; A-C. from Okinawa-jima I., D-G. from Kerama Is. (D, E. Aka-jima I.; F. Geruma-jima I.; G. Zamami-jima I.); H, I. A. kumejimana." figureDoi="10.3897/dez.70.96994.figure5" httpUri="https://binary.pensoft.net/fig/829447" pageId="0" pageNumber="143">5H, I</figureCitation>
): Median lobe wide, elongate triangular with narrow basal apophyses, ca. 2.2 times longer than its greatest width, dully pointed apically, as long as parameres. Basal apophysis weakly incurved apically. Gonopore large, situated at apex of median lobe. Parameres widest in basal half, then slightly attenuated apically, rounded apically with weak inner angle; apical third of dorsal parameres membranous. In dorsal view, lateral margin of paramere weakly sinuated. Lateral face of paramere convex at basal third. Dorsal inner margin of parameres sinuated. Phallobase as long as or slightly shorter than paramere, nearly parallel-sided in basal half, then narrowing to somewhat narrow and short manubrium; borderline between membrane and sclerite (unpigmented and pigmented area) of ventral face of phallobase very indistinct.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="143" type="distribution">
<paragraph pageId="0" pageNumber="143">Distribution.</paragraph>
<paragraph pageId="0" pageNumber="143">Kumejima I.</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="143" type="habitat">
<paragraph pageId="0" pageNumber="143">Habitat.</paragraph>
<paragraph pageId="0" pageNumber="143">
Aquatic species. Examined specimens were collected in a shallow small pool at the side of a stream (Fig.
<figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Collecting localities of the species of Anacaena on the Ryukyu Archipelago. A-B. Anacaena kumejimana; A. Daruma-yama, Kumejima I., 21 May 2007; B. Nakandakari, Kumejima I., 20 May 2007; C-E. A. okinawana; C. tributary of Benoki Dam, Kunigami-son, Okinawa-jima I., 26 Jul. 2015; D. Aka, Aka-jima I., 15 Mar. 2019; E. Geruma, Geruma-jima I., 15 Mar. 2019, after Kamite et al. (2019); F. A. torikaii; F, Kinsakubaru, Amami-oshima I., 17 Jul. 2006." figureDoi="10.3897/dez.70.96994.figure6" httpUri="https://binary.pensoft.net/fig/829448" pageId="0" pageNumber="143">6A</figureCitation>
). The specimen from Nakandakari was collected from a pond (Fig.
<figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Collecting localities of the species of Anacaena on the Ryukyu Archipelago. A-B. Anacaena kumejimana; A. Daruma-yama, Kumejima I., 21 May 2007; B. Nakandakari, Kumejima I., 20 May 2007; C-E. A. okinawana; C. tributary of Benoki Dam, Kunigami-son, Okinawa-jima I., 26 Jul. 2015; D. Aka, Aka-jima I., 15 Mar. 2019; E. Geruma, Geruma-jima I., 15 Mar. 2019, after Kamite et al. (2019); F. A. torikaii; F, Kinsakubaru, Amami-oshima I., 17 Jul. 2006." figureDoi="10.3897/dez.70.96994.figure6" httpUri="https://binary.pensoft.net/fig/829448" pageId="0" pageNumber="143">6B</figureCitation>
).
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="143" type="etymology">
<paragraph pageId="0" pageNumber="143">Etymology.</paragraph>
<paragraph pageId="0" pageNumber="143">Named after the type locality: Kumejima I., Japan.</paragraph>
</subSubSection>
</treatment>
</document>
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