Three Species of the Subgenus Microsaurus DEJEAN, 1833 of the Genus Quedius STEPHENS, 1829 (Coleoptera, Staphylinidae, Staphylinini Quediina) from Northern Laos

2007·7.6 MB·English

by  Smetana, A

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.
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