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<document ID-DOI="10.1649/840.1" ID-ISSN="1938-4394" approvalRequired="14" approvalRequired_for_document="1" approvalRequired_for_originalDoi="1" approvalRequired_for_textStreams="11" approvalRequired_for_treatments="1" checkinTime="1630177223996" checkinUser="tatiana" docAuthor="Hoshina, Hideto &amp; Satô, Masataka" docDate="2006" docId="03EB87A2094DE172DA33FBBCFEE5FB81" docLanguage="en" docName="840.1.pdf.imf" docOrigin="The Coleopterists Bulletin 60 (2)" docSource="http://dx.doi.org/10.1649/840.1" docStyle="DocumentStyle:07711681861DB98305E87147CAB6DAD5.3:TheColeopBull.2003-2009.journal_article.0cover" docStyleId="07711681861DB98305E87147CAB6DAD5" docStyleName="TheColeopBull.2003-2009.journal_article.0cover" docStyleVersion="3" docTitle="Armostus nigricans Hoshina and Sato, new species" docType="treatment" docVersion="1" lastPageId="5" lastPageNumber="100" masterDocId="FFD2FFDA094FE177DB7AFFCDFFA6FFBE" masterDocTitle="A Taxonomic Study of the Genus Armostus (Coleoptera: Hydrophilidae) from Japan" masterLastPageNumber="104" masterPageNumber="95" pageId="2" pageNumber="97" updateTime="1630177224786" updateUser="tatiana" zenodo-license-document="CLOSED">
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<mods:titleInfo>
<mods:title>A Taxonomic Study of the Genus Armostus (Coleoptera: Hydrophilidae) from Japan</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Hoshina, Hideto</mods:namePart>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Satô, Masataka</mods:namePart>
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<mods:title>The Coleopterists Bulletin</mods:title>
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<mods:date>2006</mods:date>
<mods:detail type="pubDate">
<mods:number>2006-06-30</mods:number>
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<mods:detail type="volume">
<mods:number>60</mods:number>
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<mods:detail type="issue">
<mods:number>2</mods:number>
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<mods:url>http://dx.doi.org/10.1649/840.1</mods:url>
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<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">10.1649/840.1</mods:identifier>
<mods:identifier type="ISSN">1938-4394</mods:identifier>
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<subSubSection pageId="2" pageNumber="97" type="nomenclature">
<paragraph blockId="2.[329,850,1136,1211]" box="[329,850,1136,1158]" pageId="2" pageNumber="97">
<heading box="[329,850,1136,1158]" centered="true" fontSize="9" level="2" pageId="2" pageNumber="97" reason="2">
<emphasis bold="true" box="[329,850,1136,1158]" pageId="2" pageNumber="97">
<taxonomicName authority="Hoshina and Sato" authorityName="Hoshina and Sato" box="[329,718,1136,1158]" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="2" pageNumber="97" phylum="Arthropoda" rank="species" species="nigricans" status="new species">
<emphasis bold="true" box="[329,524,1137,1158]" italics="true" pageId="2" pageNumber="97">Armostus nigricans</emphasis>
Hoshina and Satô
</taxonomicName>
,
<taxonomicNameLabel box="[731,850,1136,1157]" pageId="2" pageNumber="97" rank="species">new species</taxonomicNameLabel>
</emphasis>
</heading>
</paragraph>
<paragraph blockId="2.[329,850,1136,1211]" pageId="2" pageNumber="97">
(Japanese name: Seguro-okatsuya-gamushi) (
<figureCitation box="[414,482,1190,1211]" captionStart="Fig" captionStartId="3.[169,200,717,736]" captionTargetBox="[343,781,195,695]" captionTargetId="figure-374@3.[342,782,194,696]" captionTargetPageId="3" captionText="Fig. 1. Habitus, Armostus nigricans, new species. Scale: 1 mm." pageId="2" pageNumber="97">Figs. 1</figureCitation>
,
<figureCitation box="[495,508,1190,1211]" captionStart="Figs" captionStartId="4.[197,236,874,893]" captionTargetBox="[288,891,195,851]" captionTargetId="figure-290@4.[287,892,194,852]" captionTargetPageId="4" captionText="Figs. 27. Armostus spp. 27), body. 6) and 7), dorsal color. 2), 6), and 7), Armostus schenklingi (dOrchymont); 3), A. nigricans, new species; 4), A. crenulatus (Régimbart); 5), A. ohyamatensis, new species. Scale: 1 mm for Figs. 27." pageId="2" pageNumber="97">3</figureCitation>
,
<figureCitation box="[521,534,1190,1211]" captionStart="Figs" captionStartId="5.[169,208,831,850]" captionTargetBox="[283,840,196,808]" captionTargetId="figure-238@5.[282,843,194,810]" captionTargetPageId="5" captionText="Figs. 813. Armostus spp. dorsal color. 8), Armostus nigricans, new species; 912), A. crenulatus (Régimbart); 13), A. ohyamatensis, new species. Scale: 1 mm for Figs. 813." pageId="2" pageNumber="97">8</figureCitation>
,
<figureCitation box="[547,649,1190,1211]" captionStart="Figs" captionStartId="6.[197,236,953,972]" captionTargetBox="[296,883,195,930]" captionTargetId="figure-222@6.[295,885,194,931]" captionTargetPageId="6" captionText="Figs. 1425. Armostus spp. 1417, prosternum, lateral view; 1820 and 22, mesoventrite and metaventrite; 21, right lateral area of metaventrite; 2325, genital segment. 14, 18, and 23, Armostus schenklingi (dOrchymont); 15, 19, and 24, A. nigricans, new species; 16, 20, 21, and 25, A. crenulatus (Régimbart); 17 and 22, A. ohyamatensis, new species. Scale A: 0.1 mm for Figs. 1417; B: 0.5 mm for Figs. 1822; C: 0.2 mm for Figs. 2325." pageId="2" pageNumber="97">15, 19, 24</figureCitation>
,
<figureCitation box="[661,687,1190,1211]" captionStart="Figs" captionStartId="7.[169,208,888,907]" captionTargetBox="[149,977,194,865]" captionTargetId="figure-230@7.[148,978,194,866]" captionTargetPageId="7" captionText="Figs. 2631. Armostus spp. 26, 28, and 30, aedeagus, ventral view. 27, 29, and 31, lateral view. 26 and 27, Armostus schenklingi (dOrchymont); 28 and 29, A. nigricans, new species; 30 and 31, A. crenulatus (Régimbart). Scale: 0.2 mm for Figs. 2631." pageId="2" pageNumber="97">28</figureCitation>
, and 29)
</paragraph>
</subSubSection>
<subSubSection pageId="2" pageNumber="97" type="diagnosis">
<paragraph blockId="2.[175,1005,1230,1570]" pageId="2" pageNumber="97">
<emphasis bold="true" box="[199,303,1230,1251]" pageId="2" pageNumber="97">Diagnosis.</emphasis>
Body length is about
<quantity box="[518,576,1230,1251]" metricMagnitude="-3" metricUnit="m" metricValue="2.0" pageId="2" pageNumber="97" unit="mm" value="2.0">2 mm</quantity>
. Dorsum is black except for yellowish brown apex of elytra. Head and pronotum are strongly and densely punctate. Pronotum is more densely pubescent than other Japanese species of
<taxonomicName authorityName="Sharp" authorityYear="1890" box="[731,821,1284,1305]" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="2" pageNumber="97" phylum="Arthropoda" rank="genus">
<emphasis box="[731,821,1284,1305]" italics="true" pageId="2" pageNumber="97">Armostus</emphasis>
</taxonomicName>
. Elytra are widest approximately 1/7 at base.
</paragraph>
<paragraph blockId="2.[175,1005,1230,1570]" pageId="2" pageNumber="97">
<emphasis bold="true" box="[199,523,1336,1357]" pageId="2" pageNumber="97">
Measurement of the
<typeStatus box="[424,519,1336,1357]" pageId="2" pageNumber="97">Holotype</typeStatus>
.
</emphasis>
Body length
<quantity box="[667,747,1337,1358]" metricMagnitude="-3" metricUnit="m" metricValue="2.1" pageId="2" pageNumber="97" unit="mm" value="2.1">2.1 mm</quantity>
; head
<quantity box="[816,906,1337,1358]" metricMagnitude="-4" metricUnit="m" metricValue="4.5" pageId="2" pageNumber="97" unit="mm" value="0.45">0.45 mm</quantity>
in length (from base to front margin of clypeus) and
<quantity box="[601,688,1363,1384]" metricMagnitude="-4" metricUnit="m" metricValue="7.1" pageId="2" pageNumber="97" unit="mm" value="0.71">0.71 mm</quantity>
in width; pronotum
<quantity box="[891,978,1363,1384]" metricMagnitude="-4" metricUnit="m" metricValue="5.5" pageId="2" pageNumber="97" unit="mm" value="0.55">0.55 mm</quantity>
in length and
<quantity box="[285,359,1390,1411]" metricMagnitude="-3" metricUnit="m" metricValue="1.4" pageId="2" pageNumber="97" unit="mm" value="1.4">1.4 mm</quantity>
in width; elytra
<quantity box="[523,598,1390,1411]" metricMagnitude="-3" metricUnit="m" metricValue="1.5" pageId="2" pageNumber="97" unit="mm" value="1.5">1.5 mm</quantity>
in length and width.
</paragraph>
</subSubSection>
<subSubSection lastPageId="4" lastPageNumber="99" pageId="2" pageNumber="97" type="description">
<paragraph blockId="2.[175,1005,1230,1570]" lastBlockId="3.[148,977,779,1570]" lastPageId="3" lastPageNumber="98" pageId="2" pageNumber="97">
<emphasis bold="true" box="[199,323,1416,1437]" pageId="2" pageNumber="97">Description.</emphasis>
Coloration (
<figureCitation box="[458,524,1416,1437]" captionStart="Figs" captionStartId="5.[169,208,831,850]" captionTargetBox="[283,840,196,808]" captionTargetId="figure-238@5.[282,843,194,810]" captionTargetPageId="5" captionText="Figs. 813. Armostus spp. dorsal color. 8), Armostus nigricans, new species; 912), A. crenulatus (Régimbart); 13), A. ohyamatensis, new species. Scale: 1 mm for Figs. 813." pageId="2" pageNumber="97">Fig. 8</figureCitation>
). Dorsum bicolorous; head black with brown clypeus; pronotum black or dark brown, rarely dark reddish brown; main parts of elytra black or dark brown, rarely a little reddish, usually with reddish brown or dark brown small patches near humeri, but rarely those patches disappearing; apex of elytra with bright yellowish brown spot (
<figureCitation box="[482,546,1523,1544]" captionStart="Figs" captionStartId="5.[169,208,831,850]" captionTargetBox="[283,840,196,808]" captionTargetId="figure-238@5.[282,843,194,810]" captionTargetPageId="5" captionText="Figs. 813. Armostus spp. dorsal color. 8), Armostus nigricans, new species; 912), A. crenulatus (Régimbart); 13), A. ohyamatensis, new species. Scale: 1 mm for Figs. 813." pageId="2" pageNumber="97">Fig. 8</figureCitation>
), showing a certain variability in its extent; maxillay palpi, labrum, and antennae light brown except for brown antennomere 1; prosternum brown with a dark brown median carina; mesoventrite and metaventrite dark reddish brown; legs brown with light brown tarsi; abdominal ventrite brown. Body length
<quantity box="[215,333,832,853]" metricMagnitude="-3" metricUnit="m" metricValue="2.05" metricValueMax="2.2" metricValueMin="1.9" pageId="3" pageNumber="98" unit="mm" value="2.05" valueMax="2.2" valueMin="1.9">1.92.2 mm</quantity>
, about 1.5 times as long as wide (
<figureCitation box="[664,721,832,853]" captionStart="Fig" captionStartId="3.[169,200,717,736]" captionTargetBox="[343,781,195,695]" captionTargetId="figure-374@3.[342,782,194,696]" captionTargetPageId="3" captionText="Fig. 1. Habitus, Armostus nigricans, new species. Scale: 1 mm." pageId="3" pageNumber="98">Fig. 1</figureCitation>
). Head about 1.6 times as wide as long, smooth, very finely, sparsely, and shortly pubescent; vertex punctate densely, and more strongly than those of other Japanese species of
<taxonomicName authorityName="Sharp" authorityYear="1890" box="[795,885,885,906]" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="3" pageNumber="98" phylum="Arthropoda" rank="genus">
<emphasis box="[795,885,885,906]" italics="true" pageId="3" pageNumber="98">Armostus</emphasis>
</taxonomicName>
(
<figureCitation captionStart="Figs" captionStartId="4.[197,236,874,893]" captionTargetBox="[288,891,195,851]" captionTargetId="figure-290@4.[287,892,194,852]" captionTargetPageId="4" captionText="Figs. 27. Armostus spp. 27), body. 6) and 7), dorsal color. 2), 6), and 7), Armostus schenklingi (dOrchymont); 3), A. nigricans, new species; 4), A. crenulatus (Régimbart); 5), A. ohyamatensis, new species. Scale: 1 mm for Figs. 27." pageId="3" pageNumber="98">Figs. 2 5</figureCitation>
); clypeus minutely and densely punctate; length and width of head about 0.77 times and 0.55 times as long as those of pronotum, respectively. Pronotum widest at base, about 2.4 times as wide as long (
<figureCitation box="[471,527,965,986]" captionStart="Fig" captionStartId="3.[169,200,717,736]" captionTargetBox="[343,781,195,695]" captionTargetId="figure-374@3.[342,782,194,696]" captionTargetPageId="3" captionText="Fig. 1. Habitus, Armostus nigricans, new species. Scale: 1 mm." pageId="3" pageNumber="98">Fig. 1</figureCitation>
) and smooth; pubescence very fine and short, and more dense than that of other Japanese species of
<taxonomicName authorityName="Sharp" authorityYear="1890" box="[670,760,991,1012]" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="3" pageNumber="98" phylum="Arthropoda" rank="genus">
<emphasis box="[670,760,991,1012]" italics="true" pageId="3" pageNumber="98">Armostus</emphasis>
</taxonomicName>
(
<figureCitation box="[773,867,991,1012]" captionStart="Figs" captionStartId="4.[197,236,874,893]" captionTargetBox="[288,891,195,851]" captionTargetId="figure-290@4.[287,892,194,852]" captionTargetPageId="4" captionText="Figs. 27. Armostus spp. 27), body. 6) and 7), dorsal color. 2), 6), and 7), Armostus schenklingi (dOrchymont); 3), A. nigricans, new species; 4), A. crenulatus (Régimbart); 5), A. ohyamatensis, new species. Scale: 1 mm for Figs. 27." pageId="3" pageNumber="98">Figs. 25</figureCitation>
); punctures of pronotum dense, consisting of various sizes of punctures (
<figureCitation box="[750,812,1018,1039]" captionStart="Figs" captionStartId="4.[197,236,874,893]" captionTargetBox="[288,891,195,851]" captionTargetId="figure-290@4.[287,892,194,852]" captionTargetPageId="4" captionText="Figs. 27. Armostus spp. 27), body. 6) and 7), dorsal color. 2), 6), and 7), Armostus schenklingi (dOrchymont); 3), A. nigricans, new species; 4), A. crenulatus (Régimbart); 5), A. ohyamatensis, new species. Scale: 1 mm for Figs. 27." pageId="3" pageNumber="98">Fig. 2</figureCitation>
); lateral margins simply curved and narrowing from base towards anterior margins; length and width of pronotum about 0.40 and 0.93 times as long as those of elytra, respectively. Scutellum smooth, impunctate or having a few very minute punctures. Elytra slightly longer than wide or almost as long as wide, widest approximately 1/7 at base (
<figureCitation box="[825,880,1124,1145]" captionStart="Fig" captionStartId="3.[169,200,717,736]" captionTargetBox="[343,781,195,695]" captionTargetId="figure-374@3.[342,782,194,696]" captionTargetPageId="3" captionText="Fig. 1. Habitus, Armostus nigricans, new species. Scale: 1 mm." pageId="3" pageNumber="98">Fig. 1</figureCitation>
), smooth, and very finely and shortly pubescent, almost impunctate between striae; basal starting point of striae 6, 8, and 9 separated from base of elytra more distant than other striae; striae 9 and 10 invisible in dorsal view; lateral margins of elytra sharply narrowed from their breadth maximal points towards apex. Hind wings fully developed. Legs of normal shape as in other species of the genus
<taxonomicName authorityName="Sharp" authorityYear="1890" box="[635,725,1257,1278]" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="3" pageNumber="98" phylum="Arthropoda" rank="genus">
<emphasis box="[635,725,1257,1278]" italics="true" pageId="3" pageNumber="98">Armostus</emphasis>
</taxonomicName>
. Prosternum less shining, impunctate, and strongly microreticulate, with a carina almost straight at ventral margin in lateral view (
<figureCitation box="[328,408,1310,1331]" captionStart="Figs" captionStartId="6.[197,236,953,972]" captionTargetBox="[296,883,195,930]" captionTargetId="figure-222@6.[295,885,194,931]" captionTargetPageId="6" captionText="Figs. 1425. Armostus spp. 1417, prosternum, lateral view; 1820 and 22, mesoventrite and metaventrite; 21, right lateral area of metaventrite; 2325, genital segment. 14, 18, and 23, Armostus schenklingi (dOrchymont); 15, 19, and 24, A. nigricans, new species; 16, 20, 21, and 25, A. crenulatus (Régimbart); 17 and 22, A. ohyamatensis, new species. Scale A: 0.1 mm for Figs. 1417; B: 0.5 mm for Figs. 1822; C: 0.2 mm for Figs. 2325." pageId="3" pageNumber="98">Fig. 15</figureCitation>
); mesoventrite less shining, impunctate, and strongly microreticulate except for preepisternal elevation of mesothorax; preepisternal elevation of mesothorax about 2.7 times as long as wide, shining, strongly punctate, very finely and shortly pubescent (
<figureCitation box="[482,554,1390,1411]" captionStart="Figs" captionStartId="6.[197,236,953,972]" captionTargetBox="[296,883,195,930]" captionTargetId="figure-222@6.[295,885,194,931]" captionTargetPageId="6" captionText="Figs. 1425. Armostus spp. 1417, prosternum, lateral view; 1820 and 22, mesoventrite and metaventrite; 21, right lateral area of metaventrite; 2325, genital segment. 14, 18, and 23, Armostus schenklingi (dOrchymont); 15, 19, and 24, A. nigricans, new species; 16, 20, 21, and 25, A. crenulatus (Régimbart); 17 and 22, A. ohyamatensis, new species. Scale A: 0.1 mm for Figs. 1417; B: 0.5 mm for Figs. 1822; C: 0.2 mm for Figs. 2325." pageId="3" pageNumber="98">Fig. 19</figureCitation>
); metaventrite less shining, impunctate, and strongly microreticulate except for pentagonal middle portion, with lateral sutures running distant from episternum, and forming triangular area along each lateral margin (
<figureCitation box="[231,305,1470,1491]" captionStart="Figs" captionStartId="6.[197,236,953,972]" captionTargetBox="[296,883,195,930]" captionTargetId="figure-222@6.[295,885,194,931]" captionTargetPageId="6" captionText="Figs. 1425. Armostus spp. 1417, prosternum, lateral view; 1820 and 22, mesoventrite and metaventrite; 21, right lateral area of metaventrite; 2325, genital segment. 14, 18, and 23, Armostus schenklingi (dOrchymont); 15, 19, and 24, A. nigricans, new species; 16, 20, 21, and 25, A. crenulatus (Régimbart); 17 and 22, A. ohyamatensis, new species. Scale A: 0.1 mm for Figs. 1417; B: 0.5 mm for Figs. 1822; C: 0.2 mm for Figs. 2325." pageId="3" pageNumber="98">Fig. 19</figureCitation>
); pentagonal middle portion of metaventrite shining, punctuate, and pubescent as preepisternal elevation of mesothorax (
<figureCitation box="[659,732,1496,1517]" captionStart="Figs" captionStartId="6.[197,236,953,972]" captionTargetBox="[296,883,195,930]" captionTargetId="figure-222@6.[295,885,194,931]" captionTargetPageId="6" captionText="Figs. 1425. Armostus spp. 1417, prosternum, lateral view; 1820 and 22, mesoventrite and metaventrite; 21, right lateral area of metaventrite; 2325, genital segment. 14, 18, and 23, Armostus schenklingi (dOrchymont); 15, 19, and 24, A. nigricans, new species; 16, 20, 21, and 25, A. crenulatus (Régimbart); 17 and 22, A. ohyamatensis, new species. Scale A: 0.1 mm for Figs. 1417; B: 0.5 mm for Figs. 1822; C: 0.2 mm for Figs. 2325." pageId="3" pageNumber="98">Fig. 19</figureCitation>
); abdominal ventrite less shining, impunctate, strongly microreticulate; abdominal ventrite 1 with a distinct carina.
</paragraph>
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<paragraph blockId="3.[169,734,717,737]" box="[169,734,717,737]" pageId="3" pageNumber="98">
<emphasis bold="true" box="[169,227,717,736]" pageId="3" pageNumber="98">Fig. 1.</emphasis>
Habitus,
<taxonomicName box="[326,492,718,737]" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="3" pageNumber="98" phylum="Arthropoda" rank="species" species="nigricans" status="new species">
<emphasis box="[326,492,718,737]" italics="true" pageId="3" pageNumber="98">Armostus nigricans</emphasis>
</taxonomicName>
,
<taxonomicNameLabel box="[504,609,717,736]" pageId="3" pageNumber="98" rank="species">new species</taxonomicNameLabel>
. Scale: 1 mm.
</paragraph>
</caption>
<caption pageId="4" pageNumber="99" startId="4.[197,236,874,893]" targetBox="[288,891,195,851]" targetPageId="4">
<paragraph blockId="4.[175,1006,874,941]" pageId="4" pageNumber="99">
<emphasis bold="true" box="[197,288,874,893]" pageId="4" pageNumber="99">Figs. 27.</emphasis>
<taxonomicName box="[309,455,874,893]" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="4" pageNumber="99" phylum="Arthropoda" rank="species" species="undefined-2">
<emphasis box="[309,389,874,893]" italics="true" pageId="4" pageNumber="99">Armostus</emphasis>
spp.
<emphasis bold="true" box="[444,455,874,893]" pageId="4" pageNumber="99">2</emphasis>
</taxonomicName>
<emphasis bold="true" box="[455,488,874,893]" pageId="4" pageNumber="99">7),</emphasis>
body.
<emphasis bold="true" box="[558,576,874,893]" pageId="4" pageNumber="99">6)</emphasis>
and
<emphasis bold="true" box="[627,651,874,893]" pageId="4" pageNumber="99">7),</emphasis>
dorsal color.
<emphasis bold="true" box="[782,839,874,893]" pageId="4" pageNumber="99">2), 6),</emphasis>
and
<emphasis bold="true" box="[891,914,874,893]" pageId="4" pageNumber="99">7),</emphasis>
<taxonomicName authority="(d'Orchymont)" baseAuthorityName="d' Orchymont" baseAuthorityYear="1914" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="4" pageNumber="99" phylum="Arthropoda" rank="species" species="schenklingi">
<emphasis italics="true" pageId="4" pageNumber="99">Armostus schenklingi</emphasis>
(dOrchymont)
</taxonomicName>
;
<emphasis bold="true" box="[419,443,897,916]" pageId="4" pageNumber="99">3),</emphasis>
<taxonomicName box="[450,556,898,917]" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="4" pageNumber="99" phylum="Arthropoda" rank="species" species="nigricans" status="new species">
<emphasis box="[450,556,898,917]" italics="true" pageId="4" pageNumber="99">A. nigricans</emphasis>
</taxonomicName>
,
<taxonomicNameLabel box="[569,675,898,917]" pageId="4" pageNumber="99" rank="species">new species</taxonomicNameLabel>
;
<emphasis bold="true" box="[686,709,897,916]" pageId="4" pageNumber="99">4),</emphasis>
<taxonomicName authority="(Regimbart)" baseAuthorityName="Regimbart" baseAuthorityYear="1903" box="[717,945,898,917]" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="4" pageNumber="99" phylum="Arthropoda" rank="species" species="crenulatus">
<emphasis box="[717,832,898,917]" italics="true" pageId="4" pageNumber="99">A. crenulatus</emphasis>
(Régimbart)
</taxonomicName>
;
<emphasis bold="true" box="[955,979,897,916]" pageId="4" pageNumber="99">5),</emphasis>
<taxonomicName class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="4" pageNumber="99" phylum="Arthropoda" rank="species" species="ohyamatensis" status="new species">
<emphasis italics="true" pageId="4" pageNumber="99">A. ohyamatensis</emphasis>
</taxonomicName>
,
<taxonomicNameLabel box="[302,408,922,941]" pageId="4" pageNumber="99" rank="species">new species</taxonomicNameLabel>
. Scale: 1 mm for Figs. 27.
</paragraph>
</caption>
<paragraph blockId="4.[175,1005,991,1570]" pageId="4" pageNumber="99">
<emphasis bold="true" box="[199,257,991,1012]" pageId="4" pageNumber="99">Male.</emphasis>
Aedeagus about
<quantity box="[427,512,991,1012]" metricMagnitude="-4" metricUnit="m" metricValue="6.5" pageId="4" pageNumber="99" unit="mm" value="0.65">0.65 mm</quantity>
in length (
<figureCitation box="[614,764,991,1012]" captionStart="Figs" captionStartId="7.[169,208,888,907]" captionTargetBox="[149,977,194,865]" captionTargetId="figure-230@7.[148,978,194,866]" captionTargetPageId="7" captionText="Figs. 2631. Armostus spp. 26, 28, and 30, aedeagus, ventral view. 27, 29, and 31, lateral view. 26 and 27, Armostus schenklingi (dOrchymont); 28 and 29, A. nigricans, new species; 30 and 31, A. crenulatus (Régimbart). Scale: 0.2 mm for Figs. 2631." pageId="4" pageNumber="99">Figs. 28 and 29</figureCitation>
); median lobe about
<quantity metricMagnitude="-4" metricUnit="m" metricValue="5.4" pageId="4" pageNumber="99" unit="mm" value="0.54">0.54 mm</quantity>
in length, slender in general, apically and simply pointed in ventral view, almost straight and narrowing from basal 1/5 towards apex in lateral view; parameres about
<quantity box="[175,265,1071,1092]" metricMagnitude="-4" metricUnit="m" metricValue="4.3" pageId="4" pageNumber="99" unit="mm" value="0.43">0.43 mm</quantity>
in length; lateral sclerites of genital segment almost symmetric, apically pointed, and about 1.8 times as long as a middle sclerite (
<figureCitation box="[740,813,1098,1119]" captionStart="Figs" captionStartId="6.[197,236,953,972]" captionTargetBox="[296,883,195,930]" captionTargetId="figure-222@6.[295,885,194,931]" captionTargetPageId="6" captionText="Figs. 1425. Armostus spp. 1417, prosternum, lateral view; 1820 and 22, mesoventrite and metaventrite; 21, right lateral area of metaventrite; 2325, genital segment. 14, 18, and 23, Armostus schenklingi (dOrchymont); 15, 19, and 24, A. nigricans, new species; 16, 20, 21, and 25, A. crenulatus (Régimbart); 17 and 22, A. ohyamatensis, new species. Scale A: 0.1 mm for Figs. 1417; B: 0.5 mm for Figs. 1822; C: 0.2 mm for Figs. 2325." pageId="4" pageNumber="99">Fig. 24</figureCitation>
).
</paragraph>
</subSubSection>
<subSubSection box="[199,920,1119,1145]" pageId="4" pageNumber="99" type="distribution">
<paragraph blockId="4.[175,1005,991,1570]" box="[199,920,1119,1145]" pageId="4" pageNumber="99">
<emphasis bold="true" box="[199,330,1124,1145]" pageId="4" pageNumber="99">Distribution.</emphasis>
<collectingCountry box="[342,400,1124,1145]" name="Japan" pageId="4" pageNumber="99">Japan</collectingCountry>
: Ryukyus (Nakanoshima Is. and Amami-Ôshima Is.).
</paragraph>
</subSubSection>
<subSubSection pageId="4" pageNumber="99" type="materials_examined">
<paragraph blockId="4.[175,1005,991,1570]" pageId="4" pageNumber="99">
<emphasis bold="true" box="[199,328,1150,1171]" pageId="4" pageNumber="99">Type Series.</emphasis>
<materialsCitation collectingDate="1992-10-24" collectingDateMax="1992-10-25" collectingDateMin="1992-10-24" collectionCode="MNHA" collectorName="Nakanoshima Is. &amp; S. Kaneno" location="Tokara Island Group" municipality="Tokara Island" pageId="4" pageNumber="99" specimenCount="1" typeStatus="holotype">
<typeStatus box="[340,431,1151,1172]" pageId="4" pageNumber="99">Holotype</typeStatus>
, male,
<collectorName box="[506,671,1151,1172]" pageId="4" pageNumber="99">Nakanoshima Is.</collectorName>
,
<location LSID="urn:lsid:plazi:treatment:03EB87A2094DE172DA33FBBCFEE5FB81:8E9D606F094BE173D9D7FBB2FCDAFB2A" box="[685,892,1151,1172]" municipality="Tokara Island" name="Tokara Island Group" pageId="4" pageNumber="99">
<collectingMunicipality box="[685,819,1151,1172]" pageId="4" pageNumber="99">Tokara Island</collectingMunicipality>
Group
</location>
,
<date pageId="4" pageNumber="99" value="1992-10-24" valueMax="1992-10-25" valueMin="1992-10-24">
<collectingDate pageId="4" pageNumber="99" value="1992-10-24" valueMax="1992-10-25" valueMin="1992-10-24">2425. X. 1992</collectingDate>
</date>
,
<collectorName box="[240,344,1177,1198]" pageId="4" pageNumber="99">S. Kaneno</collectorName>
leg. (
<collectionCode box="[407,485,1177,1198]" pageId="4" pageNumber="99">MNHA</collectionCode>
)
</materialsCitation>
.
<materialsCitation box="[505,978,1177,1198]" collectingDate="1992-10-24" collectingDateMax="1992-10-25" collectingDateMin="1992-10-24" collectionCode="MNHA" collectorName="Nakanoshima Is. &amp; S. Kaneno" location="Tokara Island Group" municipality="Tokara Island" pageId="4" pageNumber="99" specimenCount="4" typeStatus="paratype">
<typeStatus box="[505,599,1177,1198]" pageId="4" pageNumber="99">Paratypes</typeStatus>
,
<specimenCount box="[614,738,1177,1198]" pageId="4" pageNumber="99" type="generic">4 specimens</specimenCount>
, same data as holotype
</materialsCitation>
;
<materialsCitation collectingDate="1968-04-07" collectionCode="FU" collectorName="Yuwan &amp; Amami-Oshima Is. &amp; N. Minakawa &amp; All" pageId="4" pageNumber="99" specimenCount="7" typeStatus="paratype">
<specimenCount pageId="4" pageNumber="99" type="generic">7 specimens</specimenCount>
,
<collectorName box="[287,358,1204,1225]" pageId="4" pageNumber="99">Yuwan</collectorName>
,
<collectorName box="[368,553,1199,1225]" pageId="4" pageNumber="99">Amami-Ôshima Is.</collectorName>
,
<date box="[564,676,1204,1225]" pageId="4" pageNumber="99" value="1968-04-07">
<collectingDate box="[564,676,1204,1225]" pageId="4" pageNumber="99" value="1968-04-07">7. IV. 1968</collectingDate>
</date>
,
<collectorName box="[687,817,1204,1225]" pageId="4" pageNumber="99">N. Minakawa</collectorName>
leg.
<collectorName box="[866,896,1204,1225]" pageId="4" pageNumber="99">All</collectorName>
type series except for the
<typeStatus box="[317,400,1231,1252]" pageId="4" pageNumber="99">holotype</typeStatus>
are preserved in
<collectionCode box="[571,604,1231,1252]" country="China" name="Fudan University, Department of Biology" pageId="4" pageNumber="99">FU</collectionCode>
</materialsCitation>
.
</paragraph>
<paragraph blockId="4.[175,1005,991,1570]" pageId="4" pageNumber="99">
<emphasis bold="true" box="[199,631,1257,1278]" pageId="4" pageNumber="99">Examined Specimens of Related Species.</emphasis>
<materialsCitation collectingDate="1881-12-08" collectorName="G. Lewis" country="Sri Lanka" location="Dikoya" pageId="4" pageNumber="99" specimenCount="1" typeStatus="syntype">
<typeStatus box="[644,722,1257,1278]" pageId="4" pageNumber="99">Syntype</typeStatus>
of
<taxonomicName authority="Sharp, 1890" authorityName="Sharp" authorityYear="1890" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="4" pageNumber="99" phylum="Arthropoda" rank="species" species="optatus">
<emphasis box="[762,932,1257,1278]" italics="true" pageId="4" pageNumber="99">Armostus optatus</emphasis>
Sharp, 1890
</taxonomicName>
,
<specimenCount box="[240,354,1284,1305]" pageId="4" pageNumber="99" type="generic">1 specimen</specimenCount>
,
<location LSID="urn:lsid:plazi:treatment:03EB87A2094DE172DA33FBBCFEE5FB81:8E9D606F094BE173DA0AFAC9FE1EFAA7" box="[368,440,1284,1305]" country="Sri Lanka" name="Dikoya" pageId="4" pageNumber="99">Dikoya</location>
,
<collectingCountry box="[455,526,1284,1305]" name="Sri Lanka" pageId="4" pageNumber="99">Ceylon</collectingCountry>
,
<date box="[540,668,1284,1305]" pageId="4" pageNumber="99" value="1881-12-08">
<collectingDate box="[540,668,1284,1305]" pageId="4" pageNumber="99" value="1881-12-08">8. XII. 1881</collectingDate>
</date>
,
<collectorName box="[682,776,1284,1305]" pageId="4" pageNumber="99">G. Lewis</collectorName>
, leg. (preserved in the collection of The Natural History Museum, London)
</materialsCitation>
.
</paragraph>
</subSubSection>
<subSubSection lastPageId="5" lastPageNumber="100" pageId="4" pageNumber="99" type="discussion">
<paragraph blockId="4.[175,1005,991,1570]" lastBlockId="5.[148,977,907,1087]" lastPageId="5" lastPageNumber="100" pageId="4" pageNumber="99">
<emphasis bold="true" box="[199,298,1336,1357]" pageId="4" pageNumber="99">Remarks.</emphasis>
<taxonomicName box="[310,499,1337,1358]" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="4" pageNumber="99" phylum="Arthropoda" rank="species" species="nigricans" status="new species">
<emphasis box="[310,499,1337,1358]" italics="true" pageId="4" pageNumber="99">Armostus nigricans</emphasis>
</taxonomicName>
,
<taxonomicNameLabel box="[514,634,1337,1358]" pageId="4" pageNumber="99" rank="species">new species</taxonomicNameLabel>
, is similar to
<taxonomicName authority="(d'Orchymont, 1914)" baseAuthorityName="d'Orchymont" baseAuthorityYear="1914" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="4" pageNumber="99" phylum="Arthropoda" rank="species" species="shenklingi">
<emphasis box="[773,900,1337,1358]" italics="true" pageId="4" pageNumber="99">A. shenklingi</emphasis>
(dOrchymont, 1914)
</taxonomicName>
, but can be distinguished from the latter by having pronotal punctations composed of small and large punctures (
<figureCitation box="[582,643,1390,1411]" captionStart="Figs" captionStartId="4.[197,236,874,893]" captionTargetBox="[288,891,195,851]" captionTargetId="figure-290@4.[287,892,194,852]" captionTargetPageId="4" captionText="Figs. 27. Armostus spp. 27), body. 6) and 7), dorsal color. 2), 6), and 7), Armostus schenklingi (dOrchymont); 3), A. nigricans, new species; 4), A. crenulatus (Régimbart); 5), A. ohyamatensis, new species. Scale: 1 mm for Figs. 27." pageId="4" pageNumber="99">Fig. 3</figureCitation>
), elytra widest approximately 1/7 at base, and a narrow yellowish brown patch on it (
<figureCitation box="[641,699,1416,1437]" captionStart="Figs" captionStartId="5.[169,208,831,850]" captionTargetBox="[283,840,196,808]" captionTargetId="figure-238@5.[282,843,194,810]" captionTargetPageId="5" captionText="Figs. 813. Armostus spp. dorsal color. 8), Armostus nigricans, new species; 912), A. crenulatus (Régimbart); 13), A. ohyamatensis, new species. Scale: 1 mm for Figs. 813." pageId="4" pageNumber="99">Fig. 8</figureCitation>
). In contrast,
<taxonomicName baseAuthorityName="d' Orchymont" baseAuthorityYear="1914" box="[831,966,1417,1438]" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="4" pageNumber="99" phylum="Arthropoda" rank="species" species="schenklingi">
<emphasis box="[831,966,1417,1438]" italics="true" pageId="4" pageNumber="99">A. schenklingi</emphasis>
</taxonomicName>
has pronotal punctures, all of the same size, elytra are widest approximately 1/3 at base (
<figureCitation box="[182,242,1470,1491]" captionStart="Figs" captionStartId="4.[197,236,874,893]" captionTargetBox="[288,891,195,851]" captionTargetId="figure-290@4.[287,892,194,852]" captionTargetPageId="4" captionText="Figs. 27. Armostus spp. 27), body. 6) and 7), dorsal color. 2), 6), and 7), Armostus schenklingi (dOrchymont); 3), A. nigricans, new species; 4), A. crenulatus (Régimbart); 5), A. ohyamatensis, new species. Scale: 1 mm for Figs. 27." pageId="4" pageNumber="99">Fig. 2</figureCitation>
), and the yellowish brown patch on elytra is wide (
<figureCitation box="[739,868,1470,1491]" captionStart="Figs" captionStartId="4.[197,236,874,893]" captionTargetBox="[288,891,195,851]" captionTargetId="figure-290@4.[287,892,194,852]" captionTargetPageId="4" captionText="Figs. 27. Armostus spp. 27), body. 6) and 7), dorsal color. 2), 6), and 7), Armostus schenklingi (dOrchymont); 3), A. nigricans, new species; 4), A. crenulatus (Régimbart); 5), A. ohyamatensis, new species. Scale: 1 mm for Figs. 27." pageId="4" pageNumber="99">Figs. 6 and 7</figureCitation>
).
<taxonomicName box="[887,1005,1470,1491]" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="4" pageNumber="99" phylum="Arthropoda" rank="species" species="nigricans" status="new species">
<emphasis box="[887,1005,1470,1491]" italics="true" pageId="4" pageNumber="99">A. nigricans</emphasis>
</taxonomicName>
<taxonomicNameLabel box="[175,289,1496,1517]" pageId="4" pageNumber="99" rank="species">new species</taxonomicNameLabel>
is also related to
<taxonomicName authority="Sharp, 1890" authorityName="Sharp" authorityYear="1890" box="[456,675,1496,1517]" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="4" pageNumber="99" phylum="Arthropoda" rank="species" species="optatus">
<emphasis box="[456,552,1496,1517]" italics="true" pageId="4" pageNumber="99">A. optatus</emphasis>
Sharp, 1890
</taxonomicName>
, but is separated from it by having the elytra widest about 1/7 at base and sharply narrowed towards apex from the maximal points (
<figureCitation box="[334,389,1549,1570]" captionStart="Fig" captionStartId="3.[169,200,717,736]" captionTargetBox="[343,781,195,695]" captionTargetId="figure-374@3.[342,782,194,696]" captionTargetPageId="3" captionText="Fig. 1. Habitus, Armostus nigricans, new species. Scale: 1 mm." pageId="4" pageNumber="99">Fig. 1</figureCitation>
), whereas in
<taxonomicName authorityName="Sharp" authorityYear="1890" box="[516,612,1549,1570]" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="4" pageNumber="99" phylum="Arthropoda" rank="species" species="optatus">
<emphasis box="[516,612,1549,1570]" italics="true" pageId="4" pageNumber="99">A. optatus</emphasis>
</taxonomicName>
, the elytra is widest about 1/3 at base and gradually narrowed. Moreover, the present new species resembles
<taxonomicName authority="Hebauer 2002" authorityName="Hebauer" authorityYear="2002" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="5" pageNumber="100" phylum="Arthropoda" rank="species" species="cuneatus">
<emphasis box="[779,890,907,928]" italics="true" pageId="5" pageNumber="100">A. cuneatus</emphasis>
Hebauer 2002
</taxonomicName>
, in appearance, but can be distinguished from the latter by having the concolorous dorsum except for the apex of elytra (
<figureCitation box="[525,586,960,981]" captionStart="Figs" captionStartId="5.[169,208,831,850]" captionTargetBox="[283,840,196,808]" captionTargetId="figure-238@5.[282,843,194,810]" captionTargetPageId="5" captionText="Figs. 813. Armostus spp. dorsal color. 8), Armostus nigricans, new species; 912), A. crenulatus (Régimbart); 13), A. ohyamatensis, new species. Scale: 1 mm for Figs. 813." pageId="5" pageNumber="100">Fig. 8</figureCitation>
), whereas in
<taxonomicName authorityName="Hebauer" authorityYear="2002" box="[721,835,960,981]" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="5" pageNumber="100" phylum="Arthropoda" rank="species" species="cuneatus">
<emphasis box="[721,835,960,981]" italics="true" pageId="5" pageNumber="100">A. cuneatus</emphasis>
</taxonomicName>
, the head and pronotum are black and the elytra are shining reddish brown with the testaceous apex and sides.
</paragraph>
</subSubSection>
<caption pageId="5" pageNumber="100" startId="5.[169,208,831,850]" targetBox="[283,840,196,808]" targetPageId="5">
<paragraph blockId="5.[148,978,831,874]" pageId="5" pageNumber="100">
<emphasis bold="true" box="[169,271,831,850]" pageId="5" pageNumber="100">Figs. 813.</emphasis>
<taxonomicName box="[292,418,831,851]" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="5" pageNumber="100" phylum="Arthropoda" rank="species" species="undetermined">
<emphasis box="[292,371,832,851]" italics="true" pageId="5" pageNumber="100">Armostus</emphasis>
spp.
</taxonomicName>
dorsal color.
<emphasis bold="true" box="[549,573,831,850]" pageId="5" pageNumber="100">8),</emphasis>
<taxonomicName box="[583,754,832,851]" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="5" pageNumber="100" phylum="Arthropoda" rank="species" species="nigricans" status="new species">
<emphasis box="[583,754,832,851]" italics="true" pageId="5" pageNumber="100">Armostus nigricans</emphasis>
</taxonomicName>
,
<taxonomicNameLabel box="[770,879,831,850]" pageId="5" pageNumber="100" rank="species">new species</taxonomicNameLabel>
;
<emphasis bold="true" box="[893,947,831,850]" pageId="5" pageNumber="100">912),</emphasis>
<taxonomicName authority="(Regimbart)" baseAuthorityName="Regimbart" baseAuthorityYear="1903" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="5" pageNumber="100" phylum="Arthropoda" rank="species" species="crenulatus">
<emphasis italics="true" pageId="5" pageNumber="100">A. crenulatus</emphasis>
(Régimbart)
</taxonomicName>
;
<emphasis bold="true" box="[359,393,855,874]" pageId="5" pageNumber="100">13),</emphasis>
<taxonomicName box="[399,539,855,874]" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="5" pageNumber="100" phylum="Arthropoda" rank="species" species="ohyamatensis" status="new species">
<emphasis box="[399,539,855,874]" italics="true" pageId="5" pageNumber="100">A. ohyamatensis</emphasis>
</taxonomicName>
,
<taxonomicNameLabel box="[551,657,855,874]" pageId="5" pageNumber="100" rank="species">new species</taxonomicNameLabel>
. Scale: 1 mm for Figs. 813.
</paragraph>
</caption>
<subSubSection pageId="5" pageNumber="100" type="etymology">
<paragraph blockId="5.[148,977,907,1087]" pageId="5" pageNumber="100">
<emphasis bold="true" box="[172,288,1039,1060]" pageId="5" pageNumber="100">Etymology.</emphasis>
The specific name,
<taxonomicName box="[500,590,1039,1060]" class="Insecta" family="Hydrophilidae" genus="Armostus" kingdom="Animalia" order="Coleoptera" pageId="5" pageNumber="100" phylum="Arthropoda" rank="species" species="nigricans">
<emphasis box="[500,590,1039,1060]" italics="true" pageId="5" pageNumber="100">nigricans</emphasis>
</taxonomicName>
is derived from nigric‾ans in Latin, meaning blackish.
</paragraph>
</subSubSection>
</treatment>
</document>