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<document ID-DOI="http://dx.doi.org/10.3897/zookeys.1056.66553" ID-GBIF-Dataset="6f05d14c-7490-40a6-b34a-8e4bd3431df6" ID-PMC="PMC8384827" ID-Pensoft-Pub="1313-2970-1056-17" ID-Pensoft-UUID="9F460C6A018E5D5B889A40EAE1F34989" ID-PubMed="34497473" ID-ZooBank="B62820E7CE524501802CD8E864C7199A" ModsDocID="1313-2970-1056-17" checkinTime="1629294920043" checkinUser="pensoft" docAuthor="Liu, Zhiping &amp; Cuccodoro, Giulio" docDate="2021" docId="C8EE3A09F60A5DA7BB1C935EF88852DA" docLanguage="en" docName="ZooKeys 1056: 17-34" docOrigin="ZooKeys 1056" docPubDate="2021-08-17" docSource="http://dx.doi.org/10.3897/zookeys.1056.66553" docTitle="Megarthrus panda Liu &amp; Cuccodoro 2021, sp. nov." docType="treatment" docUuid="536B7DD8-8691-4D7F-84AC-3BA210384AE1" docUuidSource="ZooBank" docVersion="5" id="9F460C6A018E5D5B889A40EAE1F34989" lastPageNumber="17" masterDocId="9F460C6A018E5D5B889A40EAE1F34989" masterDocTitle="Megarthrus of China. Part 4. The M. hemipterus complex (Coleoptera, Staphylinidae, Proteininae), with description of a new species from Yunnan Province" masterLastPageNumber="34" masterPageNumber="17" pageNumber="17" updateTime="1732482433209" updateUser="ExternalLinkService">
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<mods:title id="CD7102E0706C5EED98EA9A9FECA59AAB">Megarthrus of China. Part 4. The M. hemipterus complex (Coleoptera, Staphylinidae, Proteininae), with description of a new species from Yunnan Province</mods:title>
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<mods:namePart id="8F483A38788DB39BB564DCF8F36805B0">Liu, Zhiping</mods:namePart>
<mods:nameIdentifier id="47C6A2E04D7CD3C2379F824327F6FD02" type="ORCID">https://orcid.org/0000-0002-3308-3274</mods:nameIdentifier>
<mods:affiliation id="B9AF3F9FEAAAC599D6EAC21F97D34C44">Institute of Entomology, College of Plant Protection, Southwest University, Chongqing 400715, China</mods:affiliation>
<mods:nameIdentifier id="17EAF123E2E79504DE422C0CBB1B40CF" type="email">lzpzena@126.com</mods:nameIdentifier>
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<mods:namePart id="DB312AED46C047A9ED9EB2B72A748F73">Cuccodoro, Giulio</mods:namePart>
<mods:affiliation id="5011BB20356CDB775EBB0A43DAE0A723">Museum d'histoire naturelle, Case postale 6434 CH- 1211, Geneve 6, Switzerland</mods:affiliation>
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<mods:date id="D890D62434F12960AD76F6D9B12463C6">2021</mods:date>
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<mods:classification id="81F1F21D97F51A05956F450F45EF30A6">journal article</mods:classification>
<mods:identifier id="1E109284E367134FDC709063740CD472" type="DOI">http://dx.doi.org/10.3897/zookeys.1056.66553</mods:identifier>
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<subSection id="249EE8E3E3A5D77B0596EA714D4E8D14" pageId="0" pageNumber="17" type="taxonomy">
<treatment id="C8EE3A09F60A5DA7BB1C935EF88852DA" ID-GBIF-Taxon="184587224" LSID="urn:lsid:zoobank.org:act:536B7DD8-8691-4D7F-84AC-3BA210384AE1" httpUri="http://treatment.plazi.org/id/C8EE3A09F60A5DA7BB1C935EF88852DA" lastPageNumber="17" pageId="0" pageNumber="17" scope_family="Staphylinidae" scope_order="Coleoptera" scope_subFamily="Proteininae">
<subSubSection id="EA33094FFB59E76FA94250A48AE0B824" pageId="0" pageNumber="17" type="nomenclature">
<paragraph id="412C75D727BEDDA481FD07B4EA47438E" pageId="0" pageNumber="17">
<taxonomicName id="BF7E7A0CF890F23BA5828931CFEBB804" ID-CoL="8Y6B4" LSID="http://zoobank.org/536B7DD8-8691-4D7F-84AC-3BA210384AE1" authority="Liu &amp; Cuccodoro, 2021" authorityName="Liu &amp; Cuccodoro" authorityYear="2021" class="Insecta" family="Staphylinidae" genus="Megarthrus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Megarthrus panda" order="Coleoptera" pageId="0" pageNumber="17" phylum="Arthropoda" rank="species" species="panda" status="sp. nov.">Megarthrus panda</taxonomicName>
<taxonomicNameLabel id="9DA5E1F08EF4403E511CD1164770A138" pageId="0" pageNumber="17">sp. nov.</taxonomicNameLabel>
</paragraph>
</subSubSection>
<subSubSection id="C009BD4696699FA58A943F104BEBA61A" pageId="0" pageNumber="17" type="description">
<paragraph id="26116B36476E2DE91815BAAE6E5A46FC" pageId="0" pageNumber="17">
<figureCitation id="F81159B7BC2707EC4F45242F86C02170" captionStart="Figures 1921" captionStartId="F5" captionText="Figures 19 - 21. Megarthrus panda sp. nov.: habitus, male: dorsal 19 ventral 20, and lateral 21 views. Scale bar: 0.5 mm." figureDoi="10.3897/zookeys.1056.66553.figures19-21" httpUri="https://binary.pensoft.net/fig/578547" pageId="0" pageNumber="17">Figs 19-21</figureCitation>
<figureCitation id="BF5EAD47AB8D8B60A803FD15089D533C" captionStart="Figures 2223" captionStartId="F6" captionText="Figures 22 - 23. Megarthrus panda sp. nov., prothorax in dorsal 22 and ventral 23 views. Scale bar: 0.2 mm." figureDoi="10.3897/zookeys.1056.66553.figures22-23" httpUri="https://binary.pensoft.net/fig/578548" pageId="0" pageNumber="17">, 22-23</figureCitation>
<figureCitation id="94635AD2AD1671EBCF00C7161EDF26E0" captionStart="Figures 2432" captionStartId="F7" captionText="Figures 24 - 32. Megarthrus panda sp. nov., aedeagus in ventral 24 and lateral 25 views; metatibiae 26 mesotibiae 27 mesotrochanter and mesofemur 28 metatrochanter and metafemur 29 tergite VIII in lateral 30 and ventral 31 views sternite VIII in ventral view 32. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures24-32" httpUri="https://binary.pensoft.net/fig/578549" pageId="0" pageNumber="17">, 24-32</figureCitation>
<figureCitation id="30294774AE8DD3C971DC679E69BCCA6C" captionStart="Figures 3340" captionStartId="F8" captionText="Figures 33 - 40. Megarthrus panda sp. nov., female genital segments, dorsal part in ventral view 33 and ventral part in dorsal 34 and lateral 35 views antenna 36 female tergite VIII in lateral 37 and dorsal 38 views male left hemitergite IX 39 female sternite VIII in ventral view 40. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures33-40" httpUri="https://binary.pensoft.net/fig/578550" pageId="0" pageNumber="17">, 33-40</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="8F7D7E3CD855BF2950BC6E08E9263E03" pageId="0" pageNumber="17" type="type material">
<paragraph id="4336F7E0BE4D48EAE83145342644D42A" pageId="0" pageNumber="17">Type material.</paragraph>
<paragraph id="71B63532BB2403DEEE29974BE34D2B09" pageId="0" pageNumber="17">
<emphasis id="71BDDC7A4D359D388C3BBB66480E5DDF" bold="true" italics="true" pageId="0" pageNumber="17">Holotype</emphasis>
(♂):
<emphasis id="08AD5DF027333535DC349B6C874763F6" bold="true" pageId="0" pageNumber="17">China: Yunnan Prov.</emphasis>
: Jizu Shan
<geoCoordinate id="A24DCDD403C2C77E33E9C5DAE141AFCD" degrees="25.58" direction="north" orientation="latitude" precision="555" value="25.58">25.58N</geoCoordinate>
<geoCoordinate id="A924942657B0DE0BF57021DBD0D05546" degrees="100.21" direction="east" orientation="longitude" precision="555" value="100.21">100.21E</geoCoordinate>
, 2500-2700 m, 6-10.vii.1994, leg. V.
<normalizedToken id="CF1A41AD5C27F62C75149CFCB4B7047A" originalValue="Kubáñ">Kuban</normalizedToken>
, in NHMB.
<emphasis id="5A9B146E38FC58FEBC1763E5B76FE939" bold="true" italics="true" pageId="0" pageNumber="17">Paratypes</emphasis>
(20): Same data as holotype, 1 ♂ and 1 ♀ in NHMB, 1 ♂ and 1 ♀ in MHNG;
<emphasis id="89549532F1982CD2CC4464A0AEDCB059" bold="true" pageId="0" pageNumber="17">China: Yunnan Prov.</emphasis>
: NE Kunming,
<geoCoordinate id="A996AAF5A2D3B8E5DB450FE5C9B5CF81" degrees="25" direction="north" minutes="08" orientation="latitude" precision="15" seconds="35" value="25.143055">25°08'35&quot;N</geoCoordinate>
,
<geoCoordinate id="C07A4D09F0EA7BDB79E6A228A5E76175" degrees="102" direction="east" minutes="53" orientation="longitude" precision="15" seconds="49" value="102.89694">102°53'49&quot;E</geoCoordinate>
, 2320 m, 13.viii.2014, leg. M.
<normalizedToken id="D7D701383F4531DFE3094F01E532D344" originalValue="Schülke">Schuelke</normalizedToken>
[CH14-06], mixed forest with alder, oak and pine, litter and mushrooms, sifted, 2 ♂ and 3 ♀ in cSch, 1 ♂ and 1 ♀ in MHNG &amp; 1 ♂ and 1 ♀ in SWUC; NE Kunming,
<geoCoordinate id="B94A4323B4D9E488D0AB3723AE845EA2" degrees="25" direction="north" minutes="08" orientation="latitude" precision="15" seconds="40" value="25.144444">25°08'40&quot; N</geoCoordinate>
,
<geoCoordinate id="837F567570C13D9F8E0CF5EE8F0D48E2" degrees="102" direction="east" minutes="53" orientation="longitude" precision="15" seconds="48" value="102.89667">102°53'48&quot;E</geoCoordinate>
, 2290 m, 11.viii.2014, leg. M.
<normalizedToken id="655AE3E5EA5252B97D9AA601F0F36B42" originalValue="Schülke">Schuelke</normalizedToken>
[CH14-05], mixed deciduous forest with scattered pine trees, litter and mushrooms sifted, 1 ♂ in cSch; Dali Aut. Pref.
<normalizedToken id="1672853CCE8CB9465B2D426E936AAE81" originalValue="Mão">Mao</normalizedToken>
Jiao Shan, E pass, 58 km NE Dali,
<geoCoordinate id="06CDAA5375DFA4446CECE463AEB5F801" degrees="25" direction="north" minutes="56" orientation="latitude" precision="15" seconds="41" value="25.944721">25°56'41&quot;N</geoCoordinate>
,
<geoCoordinate id="B30FC7C15BDEBCB3D1C73162B68350E1" degrees="100" direction="east" minutes="40" orientation="longitude" precision="15" seconds="05" value="100.66805">100°40'05&quot;E</geoCoordinate>
, 2525 m, 4.ix.2009, leg. M.
<normalizedToken id="127CB4C5353EDF068F2BBE184A45662E" originalValue="Schülke">Schuelke</normalizedToken>
[CH 09-26] secondary mixed forest, litter, moss &amp; mushrooms, sifted, 1 ♂ and 4 ♀ in cSch &amp; 1 ♀ in MHNG.
</paragraph>
</subSubSection>
<subSubSection id="B75892F628106E087DF9D17DA9A05F1D" pageId="0" pageNumber="17" type="description">
<paragraph id="0C451EEAAE93CE7243100CE30A2115D2" pageId="0" pageNumber="17">Description.</paragraph>
<paragraph id="FB6E256CA118B297F0665691328D945A" pageId="0" pageNumber="17">
Combined length of head, pronotum and elytra = 1.7-2.1 mm; maximal pronotal width = 0.9-1.3 mm. Body (Figs
<figureCitation id="0E6619578D7B7DFC354A5F79549CE817" captionStart="Figures 1921" captionStartId="F5" captionText="Figures 19 - 21. Megarthrus panda sp. nov.: habitus, male: dorsal 19 ventral 20, and lateral 21 views. Scale bar: 0.5 mm." figureDoi="10.3897/zookeys.1056.66553.figures19-21" httpUri="https://binary.pensoft.net/fig/578547" pageId="0" pageNumber="17">19-21</figureCitation>
) predominantly chestnut brown, with pronotum usually slightly paler, frons slightly paler than vertex, and legs slightly paler than elytra. Anterior frontal margin slightly carinate, evenly convex in dorsal view. Antenna as in Fig.
<figureCitation id="EE84F5FEC23B8743F368CBF5C68A3926" captionStart="Figures 3340" captionStartId="F8" captionText="Figures 33 - 40. Megarthrus panda sp. nov., female genital segments, dorsal part in ventral view 33 and ventral part in dorsal 34 and lateral 35 views antenna 36 female tergite VIII in lateral 37 and dorsal 38 views male left hemitergite IX 39 female sternite VIII in ventral view 40. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures33-40" httpUri="https://binary.pensoft.net/fig/578550" pageId="0" pageNumber="17">36</figureCitation>
. Prothorax as in Figs
<figureCitation id="D5CF062E1C6F03F309BCE7620EA8D400" captionStart="Figures 2223" captionStartId="F6" captionText="Figures 22 - 23. Megarthrus panda sp. nov., prothorax in dorsal 22 and ventral 23 views. Scale bar: 0.2 mm." figureDoi="10.3897/zookeys.1056.66553.figures22-23" httpUri="https://binary.pensoft.net/fig/578548" pageId="0" pageNumber="17">22</figureCitation>
,
<figureCitation id="AF77D9AC2A633E1C350BA741D0B439EB" captionStart="Figures 2223" captionStartId="F6" captionText="Figures 22 - 23. Megarthrus panda sp. nov., prothorax in dorsal 22 and ventral 23 views. Scale bar: 0.2 mm." figureDoi="10.3897/zookeys.1056.66553.figures22-23" httpUri="https://binary.pensoft.net/fig/578548" pageId="0" pageNumber="17">23</figureCitation>
.
</paragraph>
<caption id="8E3E6550E398C27A634529B7B0DCA27C" doi="10.3897/zookeys.1056.66553.figures19-21" httpUri="https://binary.pensoft.net/fig/578547" pageId="0" pageNumber="17" start="Figures 1921" startId="F5">
<paragraph id="7A57969BCE2531A2FE7F66DEEB650ADD" pageId="0" pageNumber="17">
<emphasis id="FB122E878DE7F8269A5A001408F6F16C" bold="true" pageId="0" pageNumber="17">Figures 19-21.</emphasis>
<taxonomicName id="F70DDCBE06F9B474F772D6D17DBC1F4B" authorityName="Liu &amp; Cuccodoro" authorityYear="2021" class="Insecta" family="Staphylinidae" genus="Megarthrus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Megarthrus panda" order="Coleoptera" pageId="0" pageNumber="17" phylum="Arthropoda" rank="species" species="panda">
<emphasis id="56F544F8B85D0E2D1FD65E9D78A2730C" italics="true" pageId="0" pageNumber="17">Megarthrus panda</emphasis>
</taxonomicName>
sp. nov.: habitus, male: dorsal
<emphasis id="1432C38E6A4B17ED3F5F6887E7DFECFC" bold="true" pageId="0" pageNumber="17">19</emphasis>
ventral
<emphasis id="335D7EDEC6B71D0184A677FB2149284C" bold="true" pageId="0" pageNumber="17">20</emphasis>
, and lateral
<emphasis id="D2241A7CD5325FFC74131267AAE6A61E" bold="true" pageId="0" pageNumber="17">21</emphasis>
views. Scale bar: 0.5 mm.
</paragraph>
</caption>
<caption id="79799EF4F2C40373049130AE897D5519" doi="10.3897/zookeys.1056.66553.figures22-23" httpUri="https://binary.pensoft.net/fig/578548" pageId="0" pageNumber="17" start="Figures 2223" startId="F6">
<paragraph id="986A14C2DB1C0D31399568451585BBC6" pageId="0" pageNumber="17">
<emphasis id="DDA5BD81636A32511C84A65EC07D6C0E" bold="true" pageId="0" pageNumber="17">Figures 22-23.</emphasis>
<taxonomicName id="BD2E701791916323C37B5C122118F246" authorityName="Liu &amp; Cuccodoro" authorityYear="2021" class="Insecta" family="Staphylinidae" genus="Megarthrus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Megarthrus panda" order="Coleoptera" pageId="0" pageNumber="17" phylum="Arthropoda" rank="species" species="panda">
<emphasis id="EF49937A6B2A9CB060C36FB2161B7E87" italics="true" pageId="0" pageNumber="17">Megarthrus panda</emphasis>
</taxonomicName>
sp. nov., prothorax in dorsal
<emphasis id="39F4EFC2C872F2075EA71CF6E09A6D8B" bold="true" pageId="0" pageNumber="17">22</emphasis>
and ventral
<emphasis id="46919A9826360A4EB1ACA924E87B74BF" bold="true" pageId="0" pageNumber="17">23</emphasis>
views. Scale bar: 0.2 mm.
</paragraph>
</caption>
<paragraph id="B777DBDE810A41774616A6584575741E" pageId="0" pageNumber="17">
<emphasis id="EAE8640B30ABE7ABC3A9B7D69ED5E6BC" bold="true" pageId="0" pageNumber="17">
<emphasis id="44C40D8BAD31B5F00096EEBE4B496E7C" italics="true" pageId="0" pageNumber="17">Male</emphasis>
.
</emphasis>
Protibia fairly straight and evenly expanding from base to apex; adventral side flattened. Mesotrochanter (Fig.
<figureCitation id="C26F17434AB9678E393C722003BA20F7" captionStart="Figures 2432" captionStartId="F7" captionText="Figures 24 - 32. Megarthrus panda sp. nov., aedeagus in ventral 24 and lateral 25 views; metatibiae 26 mesotibiae 27 mesotrochanter and mesofemur 28 metatrochanter and metafemur 29 tergite VIII in lateral 30 and ventral 31 views sternite VIII in ventral view 32. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures24-32" httpUri="https://binary.pensoft.net/fig/578549" pageId="0" pageNumber="17">28</figureCitation>
) with about twenty peg-like setae grouped as a field. Mesofemur (Fig.
<figureCitation id="976AA709BE5E6C2B19A0B70D879BA92B" captionStart="Figures 2432" captionStartId="F7" captionText="Figures 24 - 32. Megarthrus panda sp. nov., aedeagus in ventral 24 and lateral 25 views; metatibiae 26 mesotibiae 27 mesotrochanter and mesofemur 28 metatrochanter and metafemur 29 tergite VIII in lateral 30 and ventral 31 views sternite VIII in ventral view 32. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures24-32" httpUri="https://binary.pensoft.net/fig/578549" pageId="0" pageNumber="17">28</figureCitation>
) slightly arcuate and slightly swollen. Mesotibia (Fig.
<figureCitation id="5B2F7F6F7DDABE98E7334FA0C720DE87" captionStart="Figures 2432" captionStartId="F7" captionText="Figures 24 - 32. Megarthrus panda sp. nov., aedeagus in ventral 24 and lateral 25 views; metatibiae 26 mesotibiae 27 mesotrochanter and mesofemur 28 metatrochanter and metafemur 29 tergite VIII in lateral 30 and ventral 31 views sternite VIII in ventral view 32. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures24-32" httpUri="https://binary.pensoft.net/fig/578549" pageId="0" pageNumber="17">27</figureCitation>
) subangulate, bearing peg-like setae arranged in two rows. Metatrochanter and metafemur (Fig.
<figureCitation id="1F002573235DBF618BD37D2E840A390C" captionStart="Figures 2432" captionStartId="F7" captionText="Figures 24 - 32. Megarthrus panda sp. nov., aedeagus in ventral 24 and lateral 25 views; metatibiae 26 mesotibiae 27 mesotrochanter and mesofemur 28 metatrochanter and metafemur 29 tergite VIII in lateral 30 and ventral 31 views sternite VIII in ventral view 32. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures24-32" httpUri="https://binary.pensoft.net/fig/578549" pageId="0" pageNumber="17">29</figureCitation>
) markedly swollen; posterior margin of metatrochanter broadly rectangular; posterior margin of metafemur concave in ventral view, forming sharp ridge on half length. Metatibia (Fig.
<figureCitation id="18B9EBF5DF70EDAABD1E3F29FDFFF99E" captionStart="Figures 2432" captionStartId="F7" captionText="Figures 24 - 32. Megarthrus panda sp. nov., aedeagus in ventral 24 and lateral 25 views; metatibiae 26 mesotibiae 27 mesotrochanter and mesofemur 28 metatrochanter and metafemur 29 tergite VIII in lateral 30 and ventral 31 views sternite VIII in ventral view 32. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures24-32" httpUri="https://binary.pensoft.net/fig/578549" pageId="0" pageNumber="17">26</figureCitation>
) swollen, with adventral side flattened and broadly emarginated on apical two-thirds; metatibial peg-like setae grouped as a field on apical quarter with additional peg-like setae arranged in scattered row bordering each side of emargination. Abdominal tergite VIII as in Figs
<figureCitation id="6DE57C0AAAEB7BE5FD838D5B2BA0F4C4" captionStart="Figures 2432" captionStartId="F7" captionText="Figures 24 - 32. Megarthrus panda sp. nov., aedeagus in ventral 24 and lateral 25 views; metatibiae 26 mesotibiae 27 mesotrochanter and mesofemur 28 metatrochanter and metafemur 29 tergite VIII in lateral 30 and ventral 31 views sternite VIII in ventral view 32. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures24-32" httpUri="https://binary.pensoft.net/fig/578549" pageId="0" pageNumber="17">30</figureCitation>
,
<figureCitation id="108E7A865B60095FBEAFC98035C5AD67" captionStart="Figures 2432" captionStartId="F7" captionText="Figures 24 - 32. Megarthrus panda sp. nov., aedeagus in ventral 24 and lateral 25 views; metatibiae 26 mesotibiae 27 mesotrochanter and mesofemur 28 metatrochanter and metafemur 29 tergite VIII in lateral 30 and ventral 31 views sternite VIII in ventral view 32. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures24-32" httpUri="https://binary.pensoft.net/fig/578549" pageId="0" pageNumber="17">31</figureCitation>
; abdominal sternite VIII in Fig.
<figureCitation id="8D9EDC57F4863CC27F2F397D66A4D456" captionStart="Figures 2432" captionStartId="F7" captionText="Figures 24 - 32. Megarthrus panda sp. nov., aedeagus in ventral 24 and lateral 25 views; metatibiae 26 mesotibiae 27 mesotrochanter and mesofemur 28 metatrochanter and metafemur 29 tergite VIII in lateral 30 and ventral 31 views sternite VIII in ventral view 32. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures24-32" httpUri="https://binary.pensoft.net/fig/578549" pageId="0" pageNumber="17">32</figureCitation>
; hemitergites IX as in Fig.
<figureCitation id="22B7548B916996FD5781889D82C2509B" captionStart="Figures 3340" captionStartId="F8" captionText="Figures 33 - 40. Megarthrus panda sp. nov., female genital segments, dorsal part in ventral view 33 and ventral part in dorsal 34 and lateral 35 views antenna 36 female tergite VIII in lateral 37 and dorsal 38 views male left hemitergite IX 39 female sternite VIII in ventral view 40. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures33-40" httpUri="https://binary.pensoft.net/fig/578550" pageId="0" pageNumber="17">39</figureCitation>
. Aedeagus (Figs
<figureCitation id="6FE2081E088F993E0CD5E3A08DEDABEE" captionStart="Figures 2432" captionStartId="F7" captionText="Figures 24 - 32. Megarthrus panda sp. nov., aedeagus in ventral 24 and lateral 25 views; metatibiae 26 mesotibiae 27 mesotrochanter and mesofemur 28 metatrochanter and metafemur 29 tergite VIII in lateral 30 and ventral 31 views sternite VIII in ventral view 32. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures24-32" httpUri="https://binary.pensoft.net/fig/578549" pageId="0" pageNumber="17">24</figureCitation>
,
<figureCitation id="9F7D5CE3FE4243D76A41408952A61DC9" captionStart="Figures 2432" captionStartId="F7" captionText="Figures 24 - 32. Megarthrus panda sp. nov., aedeagus in ventral 24 and lateral 25 views; metatibiae 26 mesotibiae 27 mesotrochanter and mesofemur 28 metatrochanter and metafemur 29 tergite VIII in lateral 30 and ventral 31 views sternite VIII in ventral view 32. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures24-32" httpUri="https://binary.pensoft.net/fig/578549" pageId="0" pageNumber="17">25</figureCitation>
) with ventral wall strongly narrowed at apical third in ventral view, with ventral outline markedly sinuate to slender apex strongly recurved ventrally in lateral view.
</paragraph>
<caption id="0B440AF7E97F7C25BC3926CF0BF9DE52" doi="10.3897/zookeys.1056.66553.figures24-32" httpUri="https://binary.pensoft.net/fig/578549" pageId="0" pageNumber="17" start="Figures 2432" startId="F7">
<paragraph id="ED3F4A2A70AB0759532FC8729EBC76E9" pageId="0" pageNumber="17">
<emphasis id="026C72E86962984179CEB6E6581DA806" bold="true" pageId="0" pageNumber="17">Figures 24-32.</emphasis>
<taxonomicName id="3D3875D5060DF3B3F32621DAAAC433D3" authorityName="Liu &amp; Cuccodoro" authorityYear="2021" class="Insecta" family="Staphylinidae" genus="Megarthrus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Megarthrus panda" order="Coleoptera" pageId="0" pageNumber="17" phylum="Arthropoda" rank="species" species="panda">
<emphasis id="D18D701FD136A64C9E42257CC39C8D1A" italics="true" pageId="0" pageNumber="17">Megarthrus panda</emphasis>
</taxonomicName>
sp. nov., aedeagus in ventral
<emphasis id="232A17709D3997A5FB1DB6074C2B1698" bold="true" pageId="0" pageNumber="17">24</emphasis>
and lateral
<emphasis id="D38FC60B2A009F0C6F5FF5053FEBF4AA" bold="true" pageId="0" pageNumber="17">25</emphasis>
views; metatibiae
<emphasis id="7C01832E6BD14693716083D4B84886AF" bold="true" pageId="0" pageNumber="17">26</emphasis>
mesotibiae
<emphasis id="23B0023F40EB1B2C440946D5C24D0C6C" bold="true" pageId="0" pageNumber="17">27</emphasis>
mesotrochanter and mesofemur
<emphasis id="4A5A7C4463217C94FE3498FD6E33EB16" bold="true" pageId="0" pageNumber="17">28</emphasis>
metatrochanter and metafemur
<emphasis id="39FDE72712BE39BD683BD23E8F154093" bold="true" pageId="0" pageNumber="17">29</emphasis>
tergite VIII in lateral
<emphasis id="522EDE3CA85CD646FD0B469D058FDA30" bold="true" pageId="0" pageNumber="17">30</emphasis>
and ventral
<emphasis id="C55EBC38F4C9079E8914E5B29B8D1E0C" bold="true" pageId="0" pageNumber="17">31</emphasis>
views sternite VIII in ventral view
<emphasis id="46838FDD662F63BC0BC01F8F4BA655CA" bold="true" pageId="0" pageNumber="17">32</emphasis>
. Scale bar: 0.1 mm.
</paragraph>
</caption>
<paragraph id="B3F3A603C234CEA1B2539946EAC55054" pageId="0" pageNumber="17">
<emphasis id="E26C5CDBE4C9EEFAFD46887F8F0A7FB3" bold="true" pageId="0" pageNumber="17">
<emphasis id="4987D5725BC4D5A2639D42EFBB158F4F" italics="true" pageId="0" pageNumber="17">Female</emphasis>
.
</emphasis>
Abdominal tergite VIII as in Figs
<figureCitation id="7928E1E5E79F0EDE11B7AB8B4933EE14" captionStart="Figures 3340" captionStartId="F8" captionText="Figures 33 - 40. Megarthrus panda sp. nov., female genital segments, dorsal part in ventral view 33 and ventral part in dorsal 34 and lateral 35 views antenna 36 female tergite VIII in lateral 37 and dorsal 38 views male left hemitergite IX 39 female sternite VIII in ventral view 40. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures33-40" httpUri="https://binary.pensoft.net/fig/578550" pageId="0" pageNumber="17">37</figureCitation>
,
<figureCitation id="ED9B3FD6E1DE8785B39BACCE4E18EF54" captionStart="Figures 3340" captionStartId="F8" captionText="Figures 33 - 40. Megarthrus panda sp. nov., female genital segments, dorsal part in ventral view 33 and ventral part in dorsal 34 and lateral 35 views antenna 36 female tergite VIII in lateral 37 and dorsal 38 views male left hemitergite IX 39 female sternite VIII in ventral view 40. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures33-40" httpUri="https://binary.pensoft.net/fig/578550" pageId="0" pageNumber="17">38</figureCitation>
. Valvifers as in Figs
<figureCitation id="0E67C7F749F80B7D94C8DC7AAF1EF46B" captionStart="Figures 3340" captionStartId="F8" captionText="Figures 33 - 40. Megarthrus panda sp. nov., female genital segments, dorsal part in ventral view 33 and ventral part in dorsal 34 and lateral 35 views antenna 36 female tergite VIII in lateral 37 and dorsal 38 views male left hemitergite IX 39 female sternite VIII in ventral view 40. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures33-40" httpUri="https://binary.pensoft.net/fig/578550" pageId="0" pageNumber="17">34</figureCitation>
,
<figureCitation id="E221BCD0C1D9A634C203BA93F4368866" captionStart="Figures 3340" captionStartId="F8" captionText="Figures 33 - 40. Megarthrus panda sp. nov., female genital segments, dorsal part in ventral view 33 and ventral part in dorsal 34 and lateral 35 views antenna 36 female tergite VIII in lateral 37 and dorsal 38 views male left hemitergite IX 39 female sternite VIII in ventral view 40. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures33-40" httpUri="https://binary.pensoft.net/fig/578550" pageId="0" pageNumber="17">35</figureCitation>
. Gonocoxal plate (Figs
<figureCitation id="47B1CC10133CD8FD43A8BA8EF1FD764A" captionStart="Figures 3340" captionStartId="F8" captionText="Figures 33 - 40. Megarthrus panda sp. nov., female genital segments, dorsal part in ventral view 33 and ventral part in dorsal 34 and lateral 35 views antenna 36 female tergite VIII in lateral 37 and dorsal 38 views male left hemitergite IX 39 female sternite VIII in ventral view 40. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures33-40" httpUri="https://binary.pensoft.net/fig/578550" pageId="0" pageNumber="17">34</figureCitation>
,
<figureCitation id="53D6A709EF8D6E8BF9836AF144AEA9AD" captionStart="Figures 3340" captionStartId="F8" captionText="Figures 33 - 40. Megarthrus panda sp. nov., female genital segments, dorsal part in ventral view 33 and ventral part in dorsal 34 and lateral 35 views antenna 36 female tergite VIII in lateral 37 and dorsal 38 views male left hemitergite IX 39 female sternite VIII in ventral view 40. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures33-40" httpUri="https://binary.pensoft.net/fig/578550" pageId="0" pageNumber="17">35</figureCitation>
) with lateral portions of dorsobasal margin oblique to median portion truncate, markedly projecting anterad. Dorsal part of genitalia (Fig.
<figureCitation id="C7F050307C05ADD71B349CDB38DA18C2" captionStart="Figures 3340" captionStartId="F8" captionText="Figures 33 - 40. Megarthrus panda sp. nov., female genital segments, dorsal part in ventral view 33 and ventral part in dorsal 34 and lateral 35 views antenna 36 female tergite VIII in lateral 37 and dorsal 38 views male left hemitergite IX 39 female sternite VIII in ventral view 40. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures33-40" httpUri="https://binary.pensoft.net/fig/578550" pageId="0" pageNumber="17">33</figureCitation>
) with arcuate sclerite slightly wider at middle.
</paragraph>
<caption id="C62772B19CF4F9916FA116449C4CE783" doi="10.3897/zookeys.1056.66553.figures33-40" httpUri="https://binary.pensoft.net/fig/578550" pageId="0" pageNumber="17" start="Figures 3340" startId="F8">
<paragraph id="753E5CBAE428D23AE290622BAB200E16" pageId="0" pageNumber="17">
<emphasis id="95463D153B442C9A881A6AAEB3A2C732" bold="true" pageId="0" pageNumber="17">Figures 33-40.</emphasis>
<taxonomicName id="628DFF7107471775AF2198C5BE54D342" authorityName="Liu &amp; Cuccodoro" authorityYear="2021" class="Insecta" family="Staphylinidae" genus="Megarthrus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Megarthrus panda" order="Coleoptera" pageId="0" pageNumber="17" phylum="Arthropoda" rank="species" species="panda">
<emphasis id="F03DE8F1C050C0F56E7B9DFCAD2AC2AC" italics="true" pageId="0" pageNumber="17">Megarthrus panda</emphasis>
</taxonomicName>
sp. nov., female genital segments, dorsal part in ventral view
<emphasis id="0029388F949A17549D40C5F8F10D3CE7" bold="true" pageId="0" pageNumber="17">33</emphasis>
and ventral part in dorsal
<emphasis id="31DB686C9E95826691C21BEC111B9777" bold="true" pageId="0" pageNumber="17">34</emphasis>
and lateral
<emphasis id="CBC75259CB6E881B1EA87B1D6980FCCA" bold="true" pageId="0" pageNumber="17">35</emphasis>
views antenna
<emphasis id="D1FC34FF91984CB8CA7A7B3E2B1C72EA" bold="true" pageId="0" pageNumber="17">36</emphasis>
female tergite VIII in lateral
<emphasis id="F9799D5E370E86AC6A3B096B04BF334C" bold="true" pageId="0" pageNumber="17">37</emphasis>
and dorsal
<emphasis id="AA97A2B30489953A4254219B36EF9275" bold="true" pageId="0" pageNumber="17">38</emphasis>
views male left hemitergite IX
<emphasis id="630B7491B8CD25A89C3B4BE388EE84DB" bold="true" pageId="0" pageNumber="17">39</emphasis>
female sternite VIII in ventral view
<emphasis id="3A4173C3B17AA21BBDACC5CB1BB844BF" bold="true" pageId="0" pageNumber="17">40</emphasis>
. Scale bar: 0.1 mm.
</paragraph>
</caption>
</subSubSection>
<subSubSection id="211DC7CE9F56209428974D2A3BF58C15" pageId="0" pageNumber="17" type="comparisons">
<paragraph id="D4560435C4082BB40D2DF741BFF86CB9" pageId="0" pageNumber="17">Comparisons and diagnostic notes.</paragraph>
<paragraph id="5EF5F9D2A7A38A2BE1A65C1C33581088" pageId="0" pageNumber="17">
<taxonomicName id="0272698368B208347156ACF97706AE29" authorityName="Bernhauer" authorityYear="1938" class="Insecta" family="Staphylinidae" genus="Megarthrus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Megarthrus dentipes" order="Coleoptera" pageId="0" pageNumber="17" phylum="Arthropoda" rank="species" species="dentipes">
<emphasis id="78BD41DCEC911D0525A4A35B0DC39219" italics="true" pageId="0" pageNumber="17">Megarthrus dentipes</emphasis>
</taxonomicName>
,
<taxonomicName id="3B8379722D0064EA31B4A74CDD21B465" lsidName="M. flavolimbatus" pageId="0" pageNumber="17" rank="species" species="flavolimbatus">
<emphasis id="AEDC0ED3200D3F5F458A50862EE50A00" italics="true" pageId="0" pageNumber="17">M. flavolimbatus</emphasis>
</taxonomicName>
,
<taxonomicName id="924D8CF7D0D7F1F59289ADFB97820DE7" lsidName="M. hemipterus" pageId="0" pageNumber="17" rank="species" species="hemipterus">
<emphasis id="A2D2AD5913366152DEEEDCA230EACA78" italics="true" pageId="0" pageNumber="17">M. hemipterus</emphasis>
</taxonomicName>
and
<taxonomicName id="D300C5F24094AB1E38A99BFE0D9D0B58" lsidName="M. panda" pageId="0" pageNumber="17" rank="species" species="panda">
<emphasis id="5F9D40262C415AB08FEDCA4139B6F67F" italics="true" pageId="0" pageNumber="17">M. panda</emphasis>
</taxonomicName>
sp. nov. are the only members of the genus to have the anterior frontal margin carinate, the antennae bearing short and dense pubescence only on antennomeres 5-11, hemispherical eyes with the highest point above level of the vertex, the lateral sides of pronotum and elytra slightly deplanate, the prohypomera without a marked ridge, and the pubescence on abdominal tergites parallel. Within these species
<taxonomicName id="F73ED5E11E6F16655E4690292255D934" lsidName="M. panda" pageId="0" pageNumber="17" rank="species" species="panda">
<emphasis id="FE099BCEF61F295DEA5574A9B4361922" italics="true" pageId="0" pageNumber="17">M. panda</emphasis>
</taxonomicName>
sp. nov. can be easily distinguished by the shape posterior legs of the males (Figs
<figureCitation id="16AE9DA0F75014BAC3C2BA4D8252D57E" captionStart="Figures 2432" captionStartId="F7" captionText="Figures 24 - 32. Megarthrus panda sp. nov., aedeagus in ventral 24 and lateral 25 views; metatibiae 26 mesotibiae 27 mesotrochanter and mesofemur 28 metatrochanter and metafemur 29 tergite VIII in lateral 30 and ventral 31 views sternite VIII in ventral view 32. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures24-32" httpUri="https://binary.pensoft.net/fig/578549" pageId="0" pageNumber="17">26</figureCitation>
,
<figureCitation id="166595F7E18BAAA94556ACE5F22E6717" captionStart="Figures 2432" captionStartId="F7" captionText="Figures 24 - 32. Megarthrus panda sp. nov., aedeagus in ventral 24 and lateral 25 views; metatibiae 26 mesotibiae 27 mesotrochanter and mesofemur 28 metatrochanter and metafemur 29 tergite VIII in lateral 30 and ventral 31 views sternite VIII in ventral view 32. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures24-32" httpUri="https://binary.pensoft.net/fig/578549" pageId="0" pageNumber="17">29</figureCitation>
). Its genitalia are also diagnostic, notably in the male by the aedeagal ventral wall strongly sinuate in lateral view (Fig.
<figureCitation id="8B772358AB2C19CBA04A04CCCA995122" captionStart="Figures 2432" captionStartId="F7" captionText="Figures 24 - 32. Megarthrus panda sp. nov., aedeagus in ventral 24 and lateral 25 views; metatibiae 26 mesotibiae 27 mesotrochanter and mesofemur 28 metatrochanter and metafemur 29 tergite VIII in lateral 30 and ventral 31 views sternite VIII in ventral view 32. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures24-32" httpUri="https://binary.pensoft.net/fig/578549" pageId="0" pageNumber="17">25</figureCitation>
), and in the female by the arcuate dorsal genital sclerite slightly wider at middle in combination with the dorsobasal margin of the gonocoxal plate evenly narrowed to its truncate median portion projecting anterad (Fig.
<figureCitation id="D5C39BA8C3F7A08B862E65DB61A95537" captionStart="Figures 3340" captionStartId="F8" captionText="Figures 33 - 40. Megarthrus panda sp. nov., female genital segments, dorsal part in ventral view 33 and ventral part in dorsal 34 and lateral 35 views antenna 36 female tergite VIII in lateral 37 and dorsal 38 views male left hemitergite IX 39 female sternite VIII in ventral view 40. Scale bar: 0.1 mm." figureDoi="10.3897/zookeys.1056.66553.figures33-40" httpUri="https://binary.pensoft.net/fig/578550" pageId="0" pageNumber="17">34</figureCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="5CF6F77D59B5CE0E3EC36C470FE163D1" pageId="0" pageNumber="17" type="distribution">
<paragraph id="9EC7B43AE606D35282F03CE6927CBC04" pageId="0" pageNumber="17">Distribution and natural history.</paragraph>
<paragraph id="5493F844C520C42D81FE2186F8D80924" pageId="0" pageNumber="17">
The species is endemic to Yunnan Province (Fig.
<figureCitation id="6CD008A53AD1981BD3D49C61455B22DB" captionStart="Figure 41" captionStartId="F9" captionText="Figure 41. Distribution map in China of Megarthrus dentipes Bernhauer, M. flavolimbatus Cameron, M. hemipterus (Illiger) and Megarthrus panda sp. nov. Scale bar: 300 km." figureDoi="10.3897/zookeys.1056.66553.figure41" httpUri="https://binary.pensoft.net/fig/578551" pageId="0" pageNumber="17">41</figureCitation>
), where it was found at elevations ranging from 2290 to 2700 m a. s. l. from July to September by sifting leaf litter with mushrooms in mixed deciduous forests with alder, oak and pine.
</paragraph>
<caption id="57F4F599EE1110FAA3B0BCEA519937B1" doi="10.3897/zookeys.1056.66553.figure41" httpUri="https://binary.pensoft.net/fig/578551" pageId="0" pageNumber="17" start="Figure 41" startId="F9">
<paragraph id="E31EF0B0E3610DF20CFD02D4C6975B7E" pageId="0" pageNumber="17">
<emphasis id="A73210F9A760E109D725BC63F28E0193" bold="true" pageId="0" pageNumber="17">Figure 41.</emphasis>
Distribution map in China of
<taxonomicName id="87359BCFC06E2EB86A4B16CD62FA4A1D" authorityName="Bernhauer" authorityYear="1938" class="Insecta" family="Staphylinidae" genus="Megarthrus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Megarthrus dentipes" order="Coleoptera" pageId="0" pageNumber="17" phylum="Arthropoda" rank="species" species="dentipes">
<emphasis id="A30F36B5C9550A8F54F59B355D3DE911" italics="true" pageId="0" pageNumber="17">Megarthrus dentipes</emphasis>
</taxonomicName>
Bernhauer,
<taxonomicName id="0923018D9DCD43D950E12021AA549780" lsidName="M. flavolimbatus" pageId="0" pageNumber="17" rank="species" species="flavolimbatus">
<emphasis id="1CD55E0AA6FA8BFDCB5EF050E2BC9478" italics="true" pageId="0" pageNumber="17">M. flavolimbatus</emphasis>
</taxonomicName>
Cameron,
<taxonomicName id="49A6C09A95152E5B666CF94D01A336BF" lsidName="M. hemipterus" pageId="0" pageNumber="17" rank="species" species="hemipterus">
<emphasis id="34B3E6E2CA565E37F8B545E105266276" italics="true" pageId="0" pageNumber="17">M. hemipterus</emphasis>
</taxonomicName>
(Illiger) and
<taxonomicName id="3259A277695B2E3C2237A7D9658EA442" authorityName="Liu &amp; Cuccodoro" authorityYear="2021" class="Insecta" family="Staphylinidae" genus="Megarthrus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Megarthrus panda" order="Coleoptera" pageId="0" pageNumber="17" phylum="Arthropoda" rank="species" species="panda">
<emphasis id="2D3FE520E5AD26F7EA5DBD8DDD59900A" italics="true" pageId="0" pageNumber="17">Megarthrus panda</emphasis>
</taxonomicName>
sp. nov. Scale bar: 300 km.
</paragraph>
</caption>
</subSubSection>
<subSubSection id="6BD168E914820307DE5570A5227A3590" pageId="0" pageNumber="17" type="etymology">
<paragraph id="C6B1A559950170DEAC4BE9D24353B0CD" pageId="0" pageNumber="17">Etymology.</paragraph>
<paragraph id="7ED83F19F952BF1B68C3AD1492F7CA74" pageId="0" pageNumber="17">
<taxonomicName id="3C49243BBA2D7668411F95621FA3CF8F" authorityName="Liu &amp; Cuccodoro" authorityYear="2021" class="Insecta" family="Staphylinidae" genus="Megarthrus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Megarthrus panda" order="Coleoptera" pageId="0" pageNumber="17" phylum="Arthropoda" rank="species" species="panda">
<emphasis id="BAA194A37B51A77F8ABE48813ECB3088" italics="true" pageId="0" pageNumber="17">Megarthrus panda</emphasis>
</taxonomicName>
sp. nov. shares the main body color and the forested mountains of Yunnan Province with its eponymous mammal the small
<taxonomicName id="EBB83ABDA29C06DD383ED5E62FD7B40A" authorityName="Liu &amp; Cuccodoro" authorityYear="2021" class="Insecta" family="Staphylinidae" genus="Megarthrus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Megarthrus panda" order="Coleoptera" pageId="0" pageNumber="17" phylum="Arthropoda" rank="species" species="panda">Megarthrus panda</taxonomicName>
,
<taxonomicName id="BD5399B7EF4352060287C4A5E7F56142" authorityName="F. G. Cuvier" authorityYear="1825" class="Mammalia" family="Ailuridae" genus="Ailurus" kingdom="Animalia" lsidName="Ailurus fulgens" order="Carnivora" pageId="0" pageNumber="17" phylum="Chordata" rank="species" species="fulgens">
<emphasis id="FAAE1900C4EF423374A69069DA484026" italics="true" pageId="0" pageNumber="17">Ailurus fulgens</emphasis>
</taxonomicName>
Cuvier, 1825. Noun in apposition.
</paragraph>
</subSubSection>
</treatment>
</subSection>
</document>