Elytra,Tokyo,35(1):68-75,May30,2007 ThreeSpeciesof theSubgenusMlcrosaurus DEJEAN,1833of theGenusQuedlusSTEPHENS,1829 (Coleoptera, Staphylinidae,Staphylinini: Quediina) from Northern Laos AlesSMETANA AgricultureandAgri-FoodCanada,Biodiversity,CentralExperimentalFarm, K.W.NeatbyBldg.,Ottawa,OntarioKIAOC6,Canada Abstract TwonewspeciesofthesubgenusMicrosaurusof thegenusQuedius are described from northern Laos: Q masatakai (from Phan province) and Q masasato1(fromHuPhanandPhongsalyprovinces). QuediusholzschuhiSMETANA, 1999 is for the first time recorded from Laos, and from theChinese province of Guizhou. The threespecies dealt withare the first representativesof thesubgenus Microsaurus known from Laos. Introduction Recently, I obtainedasmall collectionofspecimensbelongingtothesubgenus MlcrosaurusDEJEAN,1833of thegenusQuediusSTEPHENS,1829, takeninnorthern Laos. Thespecimensbelongedtothreespecies,oneof thempreviouslyknown from threeprovincesofmainlandChina, and theremainingtwobeingundescribedspecies. All threespecies belong to the Palaearctic faunal element. In the following the previouslyknownspecies,Quedlusholzschuhi,isdiscussed,andthetwonewspeciesare described. Quedius(Microsaurus) holzschuhiSMETANA QuediusholzschuhiSMETANA,1999,220 QuediusholzschuhiSMETANA,2002,140 New record. Northeastern Laos: Hu Phan prov., Ban Saleui, Pu Phan ruts. 20°15'N104°02'E,1500-2000m,2.IV.-1l.V2001,leg.D.Hauek,°l ,intheNaturhis- torisches Museum,Wien,Austria. Comments. Theaedoeagusofthisspecimenagreeswiththoseofthetwomalesof theoriginalseries,but it isslightlysmaller. Bothtergite10andthecharacteristically asymmetricalsternite9ofthemalegenitalsegmentareidentical,andthespecimenalso agreesinallexternalcharacterswith thespecimensoftheoriginalseries. Quedius holzschuhi was previously known from the type locality cruelShan in ThreeSpeciesofMicrosaitrusfromNorthern Laos 69 Sichuan (SMETANA, 1999, 222) and fromQinlingshaninShaanxi (SMETANA, 2002, 140). An additional record fromtheprovinceofGuizhoubecameavailablerecently: LeishanCo.,SEKalli,NELeishan, LeigongShan,E-slope26°22.74'N108°12.99'N, pass1700-1800m,14.-24.6.2001,leg. Schi11hammer&Wang(7),1°,intheNaturhis- torischesMuseum,Wien,Austria. Thesearethefirst recordsofQ holzschuhi fromtheprovinceofGuizhou(People's RepublicofChina)andfromLaos. TheoccurrenceofQholzschuhi inLaosrepresents asignificant southwardextensionofthedistributionalrangeof thespecies. Quedius(Microsaurus)masatakaisp no v (Figs. 1-5) Description. In all characters very similar to Q becvari SMETANA, 1996, but differentasfollows:headwider,moredistinctlywiderthanlong(ratio123,correspond- ingratioinQ becvari 1.l0),moredistinctlynarrowedtowardneck;eyesmoreconvex andsomewhatlarger,temperamoredistinctlyshorterthaneyesseenfromabove(ratio 0.46, correspondingratio inQ becvart 058). Antennashorter, appreciably thicker, segments four to seven about as long as wide, outer segments wider than long. Pronotummarkedlywider,wider thanlong(ratio1.16),distinctlynarrowedanteriad. Punctation ofelytrasomewhat coarser anddenser. Punctationof abdominal tergites similar,butdistinctlycoarseranddenser,particularlyatbasesoftergites. M a le. First foursegmentsof front tarsusmarkedly dilated,subbi1obed,each withmodifiedpalesetaeventrally;segment2aboutaswideasapexoftibia;segment4 slightlynarrowerthanprecedingsegments. Sternite8withthreelongsetaeateachside, withmoderatelywideanddeep,subarcuatemedioapicalemargination, triangulararea beforeemargination flattenedandsmooth (Fig.1). Genitalsegmentwith tergite10 triangular,markedlynarrowedtowardarcuateapex,withseveral longsetaeatapical margin, and with only a few fine setae in front of them (Fig 2); sternite 9of characteristicshape,similartothatofQbecvari,butwithbasalportionshorter(Fig 3). Aedoeagus(Figs4,5)ofcharacteristicshape;medianlobewithapicalportionbearing faceadjacent toparamereanobliquecarinafitting intoapicalemarginationof on paramere;paramerelarge, long,withapexdistinctlynot reachingapexofmedianlobe, apicalportionsomewhat asymmetrical,withdeep,narrowmedioapica1emargination; undersideofparamerewithoutsensorypegsetae,apicalsetaeminute,onepairsituated belowapexateachsideofmedialemarginationandonepairofevenmoreminutesetae situated below baseof medialemargination; internal sac without larger sclerotized structures. Fema le unknown. Length8.00mm. Type material. Holotype (male): Laos: “LAOS-NE HU PHAN prov; BAN SALEUI;PuPhanMt;20°l5'N104°02'E; 1500-2000m;D. Hauck leg; 2.iv.-11.v. 70 AlesSMETANA 2001”. In theSMETANAcollection,Ottawa,Canada. Geographicaldistribution. Quediusmasatakai isat presentknownonlyfromthe typelocality innortheastern Laos. Bionomics. Nothingisknownaboutthecollectingcircumstancesoftheholotype. However,sinceallspeciesof theripicola-group (SMETANA,2001, 212), towhichQ masatakaibelongs(seebelow),preferhabitatsnearrunningwater(edgesofbrooksand creeks),itisassumedthat theholotypewastakenundersimilarcircumstances. Recognition and comments. Quedius masatakai is the fourth member of the ripicola-group, that included so far two species from the Himalaya (Q ripicola CAMERON, 1926andQ m11ansaar SMETANA, 1988) andQ becvari from mainland China(SichuanandYunnan). Itdiffersfromallofthembythedistinctiveshapeofthe aedoeagus,bytheshorterantennawithoutersegmentswiderthanlong,andbythewide pronotumthat ismarkedlynarrowedanteriad. Etymology. Patronymic, named in honor of the lateDr. MasatakaSAT0, the renownedJapanesecoleopterist. Quedius(Microsaurus)masasatoisp nov (Figs 6-12) Des ription. Headdark rufopiceoustopiceous, witheach anteriolatera1area to variousextentpaler;pronotumdarkrufopiceoustopiceouswithlateralmarginswidely andbasalmarginnarrowlypaler,scutellumandelytrarufous,elytrawithcommon,dark medioapica1areaofvariousextent,oftenextendedbasadalongsuture,orrarelyalmost toentirelymissing;abdomenpalerufous,visibletergite3withsmallmedioapica1piceous area,visibletergite4withpiceousareaextensive,thatofvisibletergites5and6covering entiretergiteexcept for allmargins,apicalhalfofvisibletergite7piceous;abdomen distinctly iridescent;maxillaryandlabialpalpi testaceous,antennaedarkbrownishto piceous, first threeantennalsegmentsrufobrunneous, lastsegmentmoreor lesspaler; legs rufobrunneous. Head rounded, wider than long (ratios between 125-1.34), markedlynarrowedtowardneckbehindeyes,posterioranglesentirelyabsent;eyeslarge, convex, temperashorter thaneyesseenfromabove(index0.56);noadditionalsetifer_ ouspuncturesbetweenanterior frontalpunctures;posterior frontalpuncturesituated closetoposteriomedialmarginofeye,separatedfromitbydistanceslightlyshorterthan diameterofpuncture, twopuncturesbetweenitandposteriormarginofhead,situated closetoposteriormargin;temporalpuncturesituatedslightlyclosertoposteriormargin ofeyethantoposteriormarginofhead;temperawithafewveryfinepunctures;surface of head with extremelyfine, densemicrosculptureofmostly transversewaves with intermixed microscopic punctures. Antennamoderately long, moderately widened Fi9S. 1-6. - 1-5.Quediusmasatakat:1,apicalportionof malesternite8;2, tergite10of male 9enita1segment;3,sternite9ofmalegenitalsegment;4,aedoeagus,ventralview;5,apicalportion ofundersideofparamere. - 6.Quediusmasasatoi:apicalportionofmaletergite8. ThreeSpeciesofMicrosaurusfromNorthernLaos 71 3 5 4 6 2 72 AlesSMETANA towardapex,segment3longerthansegment2(index1.35),segment4vaguelylonger thanwide,segment5aslongaswide, followingsegmentsgraduallybecomingshorter, outersegmentswiderthanlong,lastsegmentaboutaslongastwoprecedingsegments combined. Pronotumwider thanlong(index1.14), widest at aboutposterior third, distinctlymorenarrowedanteriadthanposteriad,with lateralmarginscontinuously arcuatewithbroadlyroundedbase,transverselyconvex,lateralportionsnotexplanate; dorsal rows each with three punctures; sublatera1rowseach with two punctures, posterior puncturesituated slightly in front of level of large lateral puncture; mi_ croscuIpturesimilartothatofheadbutstillfineranddenser. Scutellumimpunctate, withextremelyfineanddensemicrosculptureof transversewaves. Elytrarelatively long, at base slightly narrower than pronotum at widest point, scarcely widened posteriad,atsuturevaguely(index1.06),atsidesmoderatelylonger (index1.19) than Pronotumatmidline;punctationandpubescencemoderatelycoarseanddense, trans- verseinterspacesbetweenpuncturesmostlylargerthandiametersofpunctures;pubes_ cencebrunneous; surfacebetweenpunctures without microsculpture. Wings fully developed. Abdomen with tergite7 (fifth visible) bearingwhitishapical seamof Palisade fringe;punctationofabdominal tergitessimilar to that onelytra, but finer, ratherevenlycoveringeachtergiteexceptmiddleareaoffirstvisibletergiteimpunctate; Pubescence brunneous; surface between punctures with excessively fine and dense microsculptureoftransversestriae. M a le. First foursegments of front tarsus dilated,sub-bilobed, each densely coveredwithmodifiedpalesetaeventrally;segment2aboutaswideasapexof tibia, se9ment4narrower thanprecedingsegments. Tergite8vaguelysinuateinmiddleof apicalmargin(Fig 6). Sternite8withthreelongsetaeoneachside,withmoderately wide,veryshallow,subarcuatemedioapica1emargination,triangularareabeforeemar_ 9ination attenedandsmooth(Fig7). Genitalsegmentwithtergite10narrow,evenly narrowed toward narrowlyarcuateapex,withseveral longsetaeat apicalmargjn, otherwisewithonlyafewfinesetae(Fig 8);sternite9 long,withlongbasalportjon, apicalportionlong,asymmentrica1,withnarrowlyarcuateapex,withapairofdiffer_ entiatedsubapicalsetae(Fig9). Aedoeagus(Figs.10,11)moderatelylarge,elongate; median lobenarrow, graduallynarrowedintoslightlydifferentiated,subacuteapex. Paramerenarrow,slightlynarrowedtoward irregularly truncateapex, apexsituated considerablybelowapexofmedianlobe;nosensorypegsetaeonundersideofparamere, buttwogroupsofveryfinesetaeonbasalportionofunderside;noapicalsetae;jntema1 sacsimple, without largersclerotizedstructures. Fema1e. First four segmentsof front tarsus not appreciably different from thoseofmale. Tergite8withratherwideanddeep,arcuatemedioapica1emargination. Genitalsegmentwithtergite10narrow,pigmentedmedioapica11y,markedlynarrowed Fi9S.7-12. Quedius masasatoi: 7, apical portionof malesternite8; 8, tergite 10 ofmalegenital Se9ment;9,sternite9ofmalegenitalsegment;10,aedoeagus,ventralview;11,undersideofapical portionofparamere;12,tergitel0offemalegenitalsegment. ThreeSpeciesofMicrosaunts fromNorthernLaos 73 10 9 11 12 74 AlesSMETANA intoacuteapexbearingtwolongapicalsetae(Fig. 12). Length7.5-8.5mm. Typematerial. Holotype(male)andallotype(female): Laos:“LAOS:Phongsaly Prov. PhongsaIyenv.,-1500m21°41-2'N102°06-8'E6.-17.5.2004 leg. C.Holz- schuh”. IntheNaturhistorischesMuseum, Wien, Austria. Paratypes: Laos: same dataas holotype, 4 5';)9, in the Naturhistorisches , Museum,Wien, Austria,and in theSMETANAcollection,Ottawa,Canada; NE-LAOS: HuPhanprov. BanSaleui,PuPhanruts.,20°15'N104°02'E,1500-2000m,2.IV.-11. V2001,leg. D. Hauck, l(11',2早早,intheScHtjrLKEcollection,Berlin,Germany,andin theSMETANAcollection,Ottawa, Canada. Geographicaldistribution. Quediusmasasatoiisatpresentknownfromtwolocali- ties in northeastern Laos. Bionomics. Nothingisknownaboutthecollectingcircumstancesofthespecimens oftheoriginalseries. Recognitionandcomments. Quediusmasasatoi isadistinctivespecies,duetoits coloration, thesecondary maleand femalesexual characters, and theshape of the aedoeagus. Thedarkmarkingontheelytramaybevariablyreduced;it ismissingina couple of specimens. Theemargination of the female tergite 8 is reduced in one specimen. Etymology. Patronymic,thespeciesisdedicatedtothelateDr.MasatakaSAT0, therenownedJapanesecoleopterist. Thespecificepithetisapartialcombinationofthe names MasatakaandSAT0. Acknowledgments I thankHaraldScHILLHAMMER(NaturhistorischesMuseum,Wien,Austria) and MichaelScH10rLKE,Berlin,Germany,forsubmittingthematerialforstudy. Ialsothank Mr.GoSATo,AgricultureandAgri-FoodCanada,Biodiversity,Ottawa,Canada, who carefully finishedthelinedrawings. 要 約 A. SMETANA: ラオス北部産ツヤムネハネカクシ属Mlcrosaurus亜属の3種. - ラオス北部 の山地から, Microsaurus亜属のツヤムネハネカクシ3種を記録した. うち1種は, 中国南西部か ら知られていたQuediusholzschuhiSMETANAに同定されたが, 他の2種は新種だと判定されたの で, 昨年の夏に亡くなった佐藤正孝博士に棒げて, MmasatakaiおよびQmasasato1と命名した. References CAMERON,M.,1926.NewspeciesofStaphylinidaefromIndia.Part11.Tratls r cfit.Soc. Londorl,1925:341- 372. DEJEAN,P.F.M.A.,1833.CataloguedosColeopteresdelacollectiondeM.Le Baron DEJEAN.Ed 2,faso. ThreeSpeciesofMlcrosaurus fromNorthernLaos 75 1-2,pp.1-176.Mequignon-Marvis,Paris. SMETANA, A., 1988.Revisionof the tribesQuediiniandAtanygnathini. Part11. TheHimalayan region (Coleoptera:Staphylinidae).Quaest ent.,24:163-464. - 1996.ContributionstotheknowledgeoftheQuediina(Coleoptera,Staphylinidae,Staphylinini)of China. Part5.GenusQuediusSTEPHENS,1829.SubgenusMicrosaurusDEJEAN,1833. Section4.Bull. natn.Sci.Mus., Tokyo,(A),22:113-132. - 1999.Ditto.Parti3.GenusQuediusSTEPHENS,1829.SubgenusMlcrosailrusDEJEAN,1833.Section 8.Elytra,Tokyo,27:213-240. - 2001.Ditto.Part20.GenusQiiedi1lsSTEPHENS,1829.SubgenusMtcrosaurusDEJEAN,1833.Section 12.Ibid., 29:193-216. - 2002.Ditto.Part22.GenusQuediusSTEPHENS,1829.SubgenusMlcrosaurusDEJEAN,1833.Section 13.Ibid. 30:137-151. STEPHENS,J.F.,1829.TheNomenclatureofBritishInsects;beingacompendiouslistofsuchspeciesasare containedin theSystematicCatalogueofBritish Insects,andformingaguideto theirclassification 68 columns. Baldwin & Cradock. London.