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<mods:title id="57FB650B278EAA65788B1F92E7ABF40B">A review of the omicrine genera Omicrogiton, Mircogioton and Peratogonus of China (Coleoptera, Hydrophilidae, Sphaeridiinae)</mods:title>
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<paragraph id="38EAC366E770EC9FBC91AC688BD8B34B" pageId="7" pageNumber="106">Taxon classification Animalia Coleoptera Hydrophilidae</paragraph>
</subSubSection>
<subSubSection id="ECACC229B56193B3A1CB8D1118126053" pageId="7" pageNumber="106" type="nomenclature">
<paragraph id="B72263F2A684979F86C79A1C9F170249" pageId="7" pageNumber="106">
<taxonomicName id="6A5D8A27125B6AB1778250FF8D7854A5" ID-CoL="43LVN" authority="Orchymont, 1937" authorityName="Orchymont" authorityYear="1937" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton coomani" order="Coleoptera" pageId="7" pageNumber="106" phylum="Arthropoda" rank="species" species="coomani">Mircogioton coomani Orchymont, 1937</taxonomicName>
Figs 5-6, 14, 20
</paragraph>
</subSubSection>
<subSubSection id="2540C78FD0ECEEB48FF9E55C29285D96" pageId="7" pageNumber="106" type="reference_group">
<paragraph id="E8045E429DB6B6212B3B8DA095B078CE" pageId="7" pageNumber="106">
<taxonomicName id="6A2FE305226E0D9E84A74C1A0C432764" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton coomani" order="Coleoptera" pageId="7" pageNumber="106" phylum="Arthropoda" rank="species" species="coomani">Mircogioton coomani</taxonomicName>
Orchymont, 1937: 464.
</paragraph>
<paragraph id="F9846813D2C652113200F8F83DFAACC9" pageId="7" pageNumber="106">
<taxonomicName id="7B5D781169F8D1D9162E740EE7319D89" class="Insecta" family="Hydrophilidae" genus="Ischyromicrus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Ischyromicrus cognitus" order="Coleoptera" pageId="7" pageNumber="106" phylum="Arthropoda" rank="species" species="cognitus">Ischyromicrus cognitus</taxonomicName>
Malcolm, 1981: 267. New synonym.
</paragraph>
<paragraph id="CCC3F463F5991B460CBA9688414D89D2" pageId="7" pageNumber="106">
<taxonomicName id="8A6B8025C50CDC0FCA2370B374E4BC1D" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton cognitus" order="Coleoptera" pageId="7" pageNumber="106" phylum="Arthropoda" rank="species" species="cognitus">Mircogioton cognitus</taxonomicName>
(Malcolm);
<bibRefCitation id="874AC8434101E22B8F71A2E0DA660F24" author="Hansen, M" journalOrPublisher="Biologiske Skrifter, Det Kongelige Danske Videnskabernes Selskab" pageId="11" pageNumber="110" pagination="1 - 368" title="The Hydrophiloid Beetles. Phylogeny, Classification and a Revision of the Genera (Coleoptera, Hydrophiloidea)." volume="40" year="1991">Hansen 1991</bibRefCitation>
: 226
</paragraph>
</subSubSection>
<subSubSection id="D522309D78E9836D46F7EE21ED5181F7" pageId="7" pageNumber="106" type="materials_examined">
<paragraph id="88A14A1F941EDA296DFACF2EA6A52245" pageId="7" pageNumber="106">Material examined.</paragraph>
<paragraph id="0A779E3D1B407BD0192F9FE2937F1415" pageId="7" pageNumber="106">
CHINA, Yunnan: 2 males, 6 unsexed spec. (SYSU, NMPC): Laiyanghe, Xinzhai Cun, 1487 m,
<geoCoordinate id="33C8974EC67FF6C5DE8ED2E48A34D1B0" direction="north" orientation="latitude" precision="55" value="22.631">22.631°N</geoCoordinate>
,
<geoCoordinate id="78745482310905343E2E85FDD663CDF5" direction="east" orientation="longitude" precision="55" value="101.132">101.132°E</geoCoordinate>
, 21.v.2011, Song Keqing lgt.; 1 male, 2 unsexed spec (SYSU): Mandian Nabanhe Conv., 11.i.2004, Li &amp; Tang lgt.; 1 spec. (NMPC): Laiyanghe, Yutang village, in decaying banana trunk, 22.v.2011, Keqing Song lgt. VIETNAM: 1 male (IZCAS): Tonkin, Hoa-Binh, leg. A. de Cooman.
</paragraph>
</subSubSection>
<subSubSection id="D8154711E6C969AA4B8DF691709184E2" pageId="7" pageNumber="106" type="diagnosis">
<paragraph id="E0E55EE2D40815C5DD5850480A095132" pageId="7" pageNumber="106">Diagnosis.</paragraph>
<paragraph id="E2C3194DD136A1192D3339F6BB0CD27E" pageId="7" pageNumber="106">
Body length 3.2-3.4 mm, width 2.2 mm. Dorsal surface dark brown, ventral surface brown to dark brown. Labrum weakly bisinuate on anterior margin, not distinctlx projecting anteriad. Scapus ca. 2.2
<normalizedToken id="4EF29851BAC74F1C0291EC8DDDBB2A43" originalValue="×">x</normalizedToken>
as long as antennomeres 2-5 combined, slightly shorter than antennal club. Head, pronotum and elytra with similar sparse and fine punctation, interstices without fine microsculpture; elytra with 10 series of punctures, series 6-7 abbreviated anteriorly. Prosternum strongly tectiform, sharp anteriorly. Mesoventral elevation much longer than wide, with distinct longitudinal groove medially, posteriorly fused with metaventral process, not projecting posteriad into a process overlapping metaventrite. Metaventrite with a longitudinal glabrous elevated band medially, forming together with mesoventral plate a joint meso-metaventral elevation. Phallobase ca. 0.3
<normalizedToken id="AD993B2D2A7EB3E03F179A35D5188547" originalValue="×">x</normalizedToken>
as long as paramere; paramere rather wide throughout, outer margin slightly concave subapically, apex semicircular. Median lobe slightly narrower than paramere, lateral margin almost parallel, apex narrowly rounded, gonopore of moderate size, subapical (Fig. 20).
</paragraph>
</subSubSection>
<subSubSection id="2DF24F497F76ED9CC8D452051E43668E" pageId="8" pageNumber="107" type="differential diagnosis">
<paragraph id="87DB04911922EA4BD072159DFC1F08E1" pageId="8" pageNumber="107">
<pageBreakToken id="84D20DEB7DBF6330834C9935BB28CF9E" pageId="8" pageNumber="107" start="start">Differential</pageBreakToken>
diagnosis.
</paragraph>
<paragraph id="24951B4377F91E7A3155CB7BD4CEC414" pageId="8" pageNumber="107">
<taxonomicName id="C67AC2A0A280B3AE472A7F8A53A523D8" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton coomani" order="Coleoptera" pageId="8" pageNumber="107" phylum="Arthropoda" rank="species" species="coomani">Mircogioton coomani</taxonomicName>
differs from
<taxonomicName id="DFEAFD7D1CB152C56F05C035722E19C0" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton spinosus" order="Coleoptera" pageId="8" pageNumber="107" phylum="Arthropoda" rank="species" species="spinosus">Mircogioton spinosus</taxonomicName>
Bameul, 1993,
<taxonomicName id="050B1E7A3828D873E5273ED0E82D274C" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton seriatus" order="Coleoptera" pageId="8" pageNumber="107" phylum="Arthropoda" rank="species" species="seriatus">Mircogioton seriatus</taxonomicName>
Hebauer, 2006 and
<taxonomicName id="ECC502583454A109322DE75CCE8360C4" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton irregularis" order="Coleoptera" pageId="8" pageNumber="107" phylum="Arthropoda" rank="species" species="irregularis">Mircogioton irregularis</taxonomicName>
Hebauer, 2006 in mesoventrite fused with metaventral process (in contrast, mesoventrite is projecting into a long process overlapping metaventrite in the latter three species). It differs from
<taxonomicName id="B9E601807D9270B0321B16A139567002" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton grandis" order="Coleoptera" pageId="8" pageNumber="107" phylum="Arthropoda" rank="species" species="grandis">Mircogioton grandis</taxonomicName>
Bameul, 1993 and
<taxonomicName id="9596D0EA34EFBFB6AF5E41597B450CE5" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton julieae" order="Coleoptera" pageId="8" pageNumber="107" phylum="Arthropoda" rank="species" species="julieae">Mircogioton julieae</taxonomicName>
(Malcolm, 1981) by the anterior margin of the labrum bisinuate (in contrast, labrum is simply concave on anterior margin in the latter two species). From
<taxonomicName id="A560BAC6B8C1A5DBB7E1B58E2FEE7F38" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton julieae" order="Coleoptera" pageId="8" pageNumber="107" phylum="Arthropoda" rank="species" species="julieae">Mircogioton julieae</taxonomicName>
it also differs by apically broad paramere and apex of median lobe not distinctly narrowed. From
<taxonomicName id="43CFEDCF850C138E7337153144C3B90C" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton grandis" order="Coleoptera" pageId="8" pageNumber="107" phylum="Arthropoda" rank="species" species="grandis">Mircogioton grandis</taxonomicName>
it may be also distinguished by smaller body size (up to 3.5 mm, in comparison with 3.8 mm in
<taxonomicName id="A29AE25202C7481880DC68DE773BD885" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton grandis" order="Coleoptera" pageId="8" pageNumber="107" phylum="Arthropoda" rank="species" species="grandis">Mircogioton grandis</taxonomicName>
).
</paragraph>
</subSubSection>
<subSubSection id="3D6B13EF1CEDB3C62580E9DAFF53201F" pageId="8" pageNumber="107" type="remark">
<paragraph id="57ED87CC612A4DEECEBE0ECD9540BF52" pageId="8" pageNumber="107">Remark.</paragraph>
<paragraph id="D2B1B63758783CA5C06781627574AF0A" pageId="8" pageNumber="107">
This species was described by
<bibRefCitation id="C4378F08B262B4FFCE77E23F5D5FB465" author="d'Orchymont, A" journalOrPublisher="Bulletin et Annales de la Societe entomologique de Belgique" pageId="11" pageNumber="110" pagination="457 - 475" title="Contribution a l'etude des Palpicornia X." volume="77" year="1937">
<normalizedToken id="87BE7E328A562121B67037AF29A2D33E" originalValue="dOrchymont">d'Orchymont</normalizedToken>
(1937)
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based on a single female collected by A. de Cooman in &quot;Tonkin, Hoa Binh&quot;. The senior author examined one male collected by the same collector and bearing the same label data. Except of clearly being a part of the same material from which
<taxonomicName id="B133E61A2EFF62B4AFB0365AC6035969" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton coomani" order="Coleoptera" pageId="8" pageNumber="107" phylum="Arthropoda" rank="species" species="coomani">Mircogioton coomani</taxonomicName>
was collected, the examined specimen agrees in all details with the original description. We therefore consider it represents
<taxonomicName id="7F3D337BA6069E47058017038193C37B" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton coomani" order="Coleoptera" pageId="8" pageNumber="107" phylum="Arthropoda" rank="species" species="coomani">Mircogioton coomani</taxonomicName>
although we have not checked the female holotype.
</paragraph>
<paragraph id="ECF98753CABBF5B1918364E9916CFEB7" pageId="8" pageNumber="107">
<bibRefCitation id="46264BD6D1C3DFB3CAC102B96F84CF19" author="Malcolm, SE" journalOrPublisher="Pan-Pacific Entomologist" pageId="11" pageNumber="110" pagination="260 - 268" title="Some Omicrini from the Oriental and Pacific regions (Coleoptera: Hydrophilidae: Sphaeridiinae)." volume="57" year="1981">Malcolm (1981)</bibRefCitation>
described
<taxonomicName id="D9C98E7751792F2EF745E729776B6E01" class="Insecta" family="Hydrophilidae" genus="Ischyromicrus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Ischyromicrus cognitus" order="Coleoptera" pageId="8" pageNumber="107" phylum="Arthropoda" rank="species" species="cognitus">Ischyromicrus cognitus</taxonomicName>
Malcolm, 1981 based on a female from upper Mekong (later transferred to
<taxonomicName id="043F4C6E046BFC5F3A5EA0F3C20D58AA" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton" order="Coleoptera" pageId="8" pageNumber="107" phylum="Arthropoda" rank="genus">Mircogioton</taxonomicName>
by
<bibRefCitation id="F9D614832991753BDEE413C8CB4D2FEB" author="Hansen, M" journalOrPublisher="Biologiske Skrifter, Det Kongelige Danske Videnskabernes Selskab" pageId="11" pageNumber="110" pagination="1 - 368" title="The Hydrophiloid Beetles. Phylogeny, Classification and a Revision of the Genera (Coleoptera, Hydrophiloidea)." volume="40" year="1991">Hansen (1991)</bibRefCitation>
). The species was redescribed by
<bibRefCitation id="094D48F09E7205B9780D3BFF809BD51C" author="Bameul, F" journalOrPublisher="Elytron" pageId="11" pageNumber="110" pagination="133 - 145" title="Two new oriental Mircogioton d'Orchymont, 1937 (Coleoptera: Hydrophilidae: Sphaeridiinae)." volume="7" year="1993">Bameul (1993)</bibRefCitation>
. The characters described by
<bibRefCitation id="1C2B04E35A5CB607437C7074CFBBDE9D" author="Malcolm, SE" journalOrPublisher="Pan-Pacific Entomologist" pageId="11" pageNumber="110" pagination="260 - 268" title="Some Omicrini from the Oriental and Pacific regions (Coleoptera: Hydrophilidae: Sphaeridiinae)." volume="57" year="1981">Malcolm (1981)</bibRefCitation>
and
<bibRefCitation id="C2169765F015E9558ACF197A106E3A87" author="Bameul, F" journalOrPublisher="Elytron" pageId="11" pageNumber="110" pagination="133 - 145" title="Two new oriental Mircogioton d'Orchymont, 1937 (Coleoptera: Hydrophilidae: Sphaeridiinae)." volume="7" year="1993">Bameul (1993)</bibRefCitation>
are identical with the specimens of
<taxonomicName id="663D609EAE4548A21F1868B91459F787" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton coomani" order="Coleoptera" pageId="8" pageNumber="107" phylum="Arthropoda" rank="species" species="coomani">Mircogioton coomani</taxonomicName>
in our hands. The type locality of
<taxonomicName id="953732A50705BAF694DA235E30E9EAD8" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton cognitus" order="Coleoptera" pageId="8" pageNumber="107" phylum="Arthropoda" rank="species" species="cognitus">Mircogioton cognitus</taxonomicName>
is situated in northeastern Laos not far from the border with China rather than in Vietnam as supposed by
<bibRefCitation id="304027D254C97BBE654CA1D080BBF607" author="Malcolm, SE" journalOrPublisher="Pan-Pacific Entomologist" pageId="11" pageNumber="110" pagination="260 - 268" title="Some Omicrini from the Oriental and Pacific regions (Coleoptera: Hydrophilidae: Sphaeridiinae)." volume="57" year="1981">Malcolm (1981)</bibRefCitation>
(
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, Hansen 1999). Bameul (1981) moreover noticed that &quot;in the description of
<taxonomicName id="0C5769975A0146E722D59C9F90E8B2E7" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton cognitus" order="Coleoptera" pageId="8" pageNumber="107" phylum="Arthropoda" rank="species" species="cognitus">Mircogioton cognitus</taxonomicName>
, no characters really differ from those given by
<bibRefCitation id="630C0A35BBD9EF65FA05DC06C0F2EC8B" author="d'Orchymont, A" journalOrPublisher="Bulletin et Annales de la Societe entomologique de Belgique" pageId="11" pageNumber="110" pagination="457 - 475" title="Contribution a l'etude des Palpicornia X." volume="77" year="1937">
<normalizedToken id="E932E37EEDFE0015E6BD5FCF9EB5A1BD" originalValue="dOrchymont">d'Orchymont</normalizedToken>
(1937)
</bibRefCitation>
in his description of
<taxonomicName id="C8AE033C415953B981F3101208098279" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton coomani" order="Coleoptera" pageId="8" pageNumber="107" phylum="Arthropoda" rank="species" species="coomani">Mircogioton coomani</taxonomicName>
&quot; and supposed that
<taxonomicName id="3A2ABA9E5D6022B7687DDAF4392F9668" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton cognitus" order="Coleoptera" pageId="8" pageNumber="107" phylum="Arthropoda" rank="species" species="cognitus">Mircogioton cognitus</taxonomicName>
is synonym of
<taxonomicName id="02E1477E93B8C5E110FECED2C9241068" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton coomani" order="Coleoptera" pageId="8" pageNumber="107" phylum="Arthropoda" rank="species" species="coomani">Mircogioton coomani</taxonomicName>
. We are following this opinion here and consider
<taxonomicName id="93DC8063A414364F6F9A9BFCDDC294B6" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton cognitus" order="Coleoptera" pageId="8" pageNumber="107" phylum="Arthropoda" rank="species" species="cognitus">Mircogioton cognitus</taxonomicName>
as a junior subjective synonym of
<taxonomicName id="BEEF2D9B5FA750A16EDC3189F458D627" class="Insecta" family="Hydrophilidae" genus="Mircogioton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mircogioton coomani" order="Coleoptera" pageId="8" pageNumber="107" phylum="Arthropoda" rank="species" species="coomani">Mircogioton coomani</taxonomicName>
.
</paragraph>
</subSubSection>
<subSubSection id="EAC08641D3786E5DC644728C8967EDB2" pageId="8" pageNumber="107" type="biology">
<paragraph id="24C1D8CC7E55D3CAB693FF6C0B405CEA" pageId="8" pageNumber="107">Biology.</paragraph>
<paragraph id="7BEE4180B9E201048DFBAD137D2562BF" pageId="8" pageNumber="107">The recently collected specimens examined here were found in decaying banana trunk (K.-Q. Song and L. Tang, pers. comm.).</paragraph>
</subSubSection>
<subSubSection id="2E6170E7BF85CA4B96F1F18853B96760" pageId="8" pageNumber="107" type="distribution">
<paragraph id="B296BED5B74FCB393FBFEC46A22FA876" pageId="8" pageNumber="107">Distribution.</paragraph>
<paragraph id="DBDB7F989120EC2A1EABC2B9D4C8B080" pageId="8" pageNumber="107">China (Yunnan), northern Laos. New genus and species for China.</paragraph>
</subSubSection>
</treatment>
</document>