New Species of the Genus Lathrobium (Coleoptera, Staphylinidae) from the Wu-yan-ling Nature Protective Area in Zhejiang Province, East China

10 Pages·1992·9.6 MB·English

Elyt1'a,Tokyo,20(1):47-56,May15,I992
NewSpeciesof theGenus Lathrobiun1(Coleoptera,Staphylinidae)
fromtheWu-van-lingNatureProtectiveAreainZhejiang
Province, EastChina1)
Yasuaki WATANABE
LaboratoryofEntomology,TokyoUniversityofAgriculture,
Tokyo,156Japan
and
LU0 Zhi-yi
Shanghai InstituteofEntomology,AcademiaSinica,
Shanghai,200025China
AbSt「act TwonewspeciesofapterousLat/11・obitm1aredescribedandillustrated
under thenan、esof L. l''nadateiand L. la/nta・al. Theformerbe、ongsIothegroupof
Lb''achypte''-1andtheothertothegroupofLn1o,ltl(ola,bot、l havjngbeenoblajned
f「omthelitterzoneoftheWu-van-lingNatureProtectiveAreainTaj_shuncountyof
ZhejiangProvince,EastChina.
From thebeginningtothemiddleofSeptember,1990,theauthorshadanop_
PO「tunityofinvestigatingthestaphylinidfaunaoftheWu-yan-1ingNatureprotectjve
AreainTai-shunCountyofZhejiangProvinceasmembersoftheSjno_Japaneseco_
operativeStudyonSoilFaunaofSubtropicalForestsinChjna.
Du「in9theinvestigation,twospeciesof Lat/1,・obilM1wereobtainedfromtheljtter
Zoneof temperatemixed forest in theWu-yan-1ingNatureProtectiveAreaat an
altitudeofabout800m. OneofthembelongstothegroupofL bl・achypterumforthe
「eaSOnofhavingsimilarbodysizeandtransverseelytra,whiletheothertothegroup
of L mo,1tlc・olabecauseofitssmallsize.
Afteracarefulexamination,itbecameclearthat thesespeciesdidnotagreewith
theknownspeciesofrespectivegroupsinsecondarysexualcharecterofabdomenand
configurationofmalegenitalorgan. Theyseem to benew toscience, and wj11 be
describedinthepresentpaper. Thebolo-andallotypesofthetwonewspeciestobe
describedaredepositedin thecollectionof theShanghai Instituteof Entomology,
AcademiaSinica,China, and theparatypesarepreserved in thecollection
of the
LaboratoryofEntomology,TokyoUniversityofAgriculture,Tokyo.
Beforegoingfurther,theauthorswishtoexpresstheirheartythankstoProfessor
YINWen-yingof theShanghai InstituteofEntomology,AcademiaSjnjca,andpro_
l) ThisStudyissupportedbytheGrant-in-aidNo.01041032for FieldResearchof theMonbusho
InternationalScientificResearchProgram,Japan.
48 YasuakiWATANABEandLuoZhi-yi
tosserGentaroIMADATEofTokyoMedicalandDentalUniversityforthei「kindhelp
through theSjno-JapaneseCooperativeStudy. Deepgratitudeisalsodue to D「.
shun_IchjUENoof theNationalScienceMuseum(Nat. Hist),Tokyo, for hisadvice
onthepresentstudy,andtoProfessorHiroshiTAMuRAofIbarakiUniVe「Sity,Mite,
andthemembersoftheSine-JapaneseCooperativeStudy,fortheirkindCo1labO「atiOn
insearchingforthesenewspeciesinthefield.
Lathrobiumimadateisp nov
(Fig5.1-6)
Bodylength:8.7_9.0mm(fromfrontmarginofheadtoanalend);3.7-4.0mm
(fromfrontmarginofheadtoelytra1apices).
Bodyelongate, nearly parallel-sidedandsubdepressedabove. Colour reddish
moderatelyshining,withantennaesomewhatPale「eX-
brown to reddjsh black and
(・eptforproxjmalfivesegmentsorso,mouthparts,terminalsegmentofabdomenand
legsyellowishbrown.
Head subtrapezoidal, gentlyconvex in middle and a little broader than Ion9
lwjdth/length=1.12),widestattheposteriorfourthandmorestronglynarrowedan-
1erjad than posteriad; lateral sides feebly arcuate, frontal area between antennal
tubercles transversely flattened and impunctate, provided with a distinct setife「ouS
puncture inside each antennal tubercle; surface covered with microscopic 9「ound
culptureallover,rathercoarselyandsetiferouslypunctured, thesetiferouspunCtu「oS
becomjngcloseronlatero-posteriorareasthanonmedic-frontalarea;eyessmall,the
1ongjtudjna1diameter lessthanone-thirdaslongasthepostocularpart. Antennae
relativelyslender,extendingalittlebeyondthemiddleofpronotumandnotthickened
apjcad,wjthtwoproximalsegmentspolishedandtheremainingsopaque;1stsegment
robust,dilatedapicad,morethan2.5timesaslongasbroad,2ndconstrictedat the
base,1.5timesas longas broad, butmuchshorter(2nd/1st=0.38)andalittlenar-
rower(2nd/1st=0.67)than1st,3rdsomewhatdilatedapicad,twiceaslongasbroad
andaljttlelongerthan(3rd/2nd=1.34)butasbroadas2nd,4thto6thalmostequal
Inbothlengthandwidthtooneanother,each15timesaslongasbroad,7thto10th
◆loreorlessmoniliformandequalinbothlengthandwidthtooneanother,eachabout
1.25timesaslongasbroad,apicalmost fusiform,about twiceaslongasbroadand
1.5timesaslongas10th,subacuminatetowardsthetip.
pronotum moderatelyconvexanddistinctly longer thanbroad (length/width=
1.19),slightlybroader thanhead (pronotum/head=1.04),widestjustbehindanterior
anglesandgentlynarrowedposteriad;lateralsidesalmoststraightasseenfromabove
jxcept nearanteriorandposteriorangles,anteriormargin feeblyarcuate, posterior
marginstraightbutslightlyemarginateatthemiddle,anterioranglesroundedbutnot
vjsjblefromdorsalside,posterioronesobtuse;surfacesparinglycoveredwithrather
coarsepuncturesexcept foranarrowlongitudinalsmoothareaalongthemedianline.
Scutellumsubtriangular, providedwitha fewsuperficialsetiferouspunctureson the
New Lath,・obitm1fromChina 49
Fig. l. af/1ro加″nlmadare1sp
nov., d
Scale:3.0mm.
Su「face. Elytrasomewhat dilatedposteriadandalittle transverse (wjdth/1ength=
1.18), as broad asbut evidentlyshorter (elytra/pronotum=0.71) than
pronotum;
late「alSidesfeeblyarcuate,posteriormarginemarginateatthemjddle,posterjorangles
obliquelytruncated;surfaceratherdenselyandroughlypunctured,andcoveredwjth
finebrownishpubescencedecumbent backwards. Hindwingseachdegenerated toa
minute lobe. Legsrelativelyshort;profemurremarkablythickened,provjdedwjtha
Subtrian9ulartoothnearapicalthirdontheinner face;protibiadilatedapicad,hot_
lowedinbasalhaltontheinner faceandarmedwithfivecomb-liketransverserows
ofyellowishsetaewithinthehollow;meso-andmetatibiaenotmodjfjed;1st to4th
protarsa1segmentsstronglydilated,meso-and metatarsi thin.
Abdomeneton9ate,parallel-sidedinbasalfivevisiblesegmentsbutabruptlynar_
rowed from6thvisiblesegment toanalend; basal four tergiteseachshallowlyand
t「ansverselydepressedalongthebase;surfaceofeachtergitemoderatelyclosely,su_
perficia11ypuncturedandfinelypubescent;preapica1sternitesemicircularlyandasym_
metricallyexcisedat themiddleof posteriormarginand longellipticallydepressed
、0 YasuakiWATANABEandLUoZhi-yl
Fig 2 Last fourabdominalstemitesinmaleof Lat111・obiumimadate1sp nov. Scale: l・0mm
5
Fjgs 3_5. Malegenital organof Lat/1・,obiu,nimadateisp nov.;ventralview(3),late「alView
(4),anddorsalvew (5). Scale:1.0mm.
alongthemedianlineinfrontoftheexcision,surfaceof thedepressioncoveredWith
hortrjgjdblackishsetae;5thvisiblesterniteshallowlyemarginateat themiddleof
Dosterjormargin,providedwithahorseshoe-shapeddepressionshallower than that
New Lath1・obiumfromChina 51
Fig. 6. Apical part of fusedparamere of Lalhrobiu,nimadatei sp nov. (paratype). Scale
0.5mm.
onpreapica1sternitebeforetheemargination,surfaceof thedepressioncoveredwith
similar setae to thoseon6thsternite; 4thvisiblesternitesomewhat depressed at the
middlejust beforeposteriormarginandcoveredwithnumerousblackishsetaeonthe
surfaceofthedepression;3rdvisiblesterniteprovidedwithasmall lumpofsimilar
setaetothoseon4thsterniteatthemiddleinfrontofposteriormargin,thoughsome-
timeswanting.
Genital organ well sclerotized except for eachside of dorsum. Median lobe
shorter than fusedparamere. Fusedparamereelongateandasymmetrical,distinctly
constrictednear themiddleandmorestronglywidenedapicadthanbasad,apicalhalf
spindle-shaped,ventralsurfacegentlyelevatednearapical fourthinprofile. Dorsal
sideofmedian lobeprovidedwithawellsclerotizedplate, which isstronglywidened
apicad, with theapex truncated though minutely andsubtriangularly projecting at
themiddle.
Female. Similar tomaleingeneralappearance, though the ist to4thprotarsal
segmentsare lessdilated, last visibleabdominal sterniteproducedposteriadat the
middleandnarrowlyroundedattheapex.
Typeseries. Holotype: , allotype: Wu-van-ling NatureProtective Area,
,
Tai-shun County, ZhejiangProvince, China, 11-IX-1990, Y. WATANABEleg. Para-
types: 3 ,samedataas for the holotype; 2 , same localityand collector as
for theholotype,10-IX-1990.
fsfrl加tlon. EastChina.
Notes. Inviewof itsbuildandsize,thepresentnewspeicesbelongstothegroup
of L brachypterumfromJapan,butcanbereadilydistinguished fromtheother mem-
bersofthegroupby theconfigurationofsecondarysexualcharacterofabdomenand
)2 YasuakiWATANABEandLUoZhi-yi
genitalorganinthemale.
One of the paratypesslightly differs from theothersinconfiguration of fused
r,aramereofmalegenitalorgan, butthedifferencecanberegardedasaninfraspecific
、,'ariation.
ThespecificnameisgivenafterProfessorGentaro lMADATEof TokyoMedical
Ind Dental University, who gave theauthors the opportunity to participatein the
Sine-JapaneseCooperativeStudyonSoilFaunaofSubtropical ForestsinChina.
Lathrobiumtamuraisp nov
(Figs.7-11)
Body length: 5.9-6.3mm (from frontmarginof head toanal end); 2.6-2.8mm
lfromfrontmarginofheadtoelytralapices).
Bodyelongate, nearly parallel-sidedandsubdepressedabove. Colour reddish
っrowntodark reddishbrownandmoderatelyshining,withantennaesomewhat paler,
mouthparts,terminalsegmentofabdomenandlegsyellowishbrown.
Head subquadrate, somewhat depressed above and transverse (width/length=
1.08), gentlynarrowedanteriad, with lateralsides feeblyarcuate; front areabetween
antennal tuberclestransversely flattenedandglabrous, thoughprovidedwithaseti-
ferous puncture insideeach antennal tubercle; disc sparsely scattered with rather
coarsesetiferouspuncturesexcept for impunctatevertexalarea, latero-posterior area
alsocoveredextensivelywithsetiferouspunctureswhicharesomewhatfinerandmore
numerousthan thoseon disc; eyessmall, thelongitudinal diameter about two-fifths
as longas thepostocularpart. Antennaeelongate,extending to themiddleof pro-
notumandnotthickenedapicad;proximal twosegmentspolishedandtheremainings
moreorlessopaque,1stsegment robust,stronglydilatedapicad,morethan twiceas
longasbroad,2ndevidentlylongerthanbroad(length/width=1.28)butmuchshorter
(2nd/1st=0.45)anddistinctly narrower (2nd/1st=0.78) than1st,3rdequal inboth
lengthand width to2nd, 5th to10thmoreor lessmoniliformandequal in width to
oneanother,4thdistinctlylongerthanbroad(length/width=1.l5)butsomewhatshorter
than3rd(4th/3rd=0.90),5thaslongas4thandequalinwidthto4th,6thto9thequal
inlengthtooneanother,6thand7theachaslongasbroadandalittleshorterthan5th
(6th/5th-0.89), 8th and 9th each slightly longer than broad (length/width=1.03),
10thlonger thanbroad (length/width=1.25),somewhat longer (loth/9th=1.25) and
slightlybroader (loth/9th=1.03) than9th, apicalmost fusiform,more than t5 times
aslongasbroadandapparentlylonger than10th(apicalmost/10th=1.25),subacumi-
natetowardsthetip.
Pronotumoblongandmoderately convexmedially,evidentlylonger thanbroad
(length/width=l.15),considerablylonger(pronotum/head=l.43)andalittlebroader
(pronotum/head=1.16) thanhead, widest behindanterior angles andslightly nar-
rowedposteriad;lateralsidesnearlystraightexceptnearanteriorandposteriorangles,
anterior margin gently rounded but straight or slightly emarginate at the middle,
New Lat11robiumfromChina 53
Fig.7. Lath・,obitanta,ma,alsp nov.,cl
Scale:2.0mm.
Pesto「iO「 ma「9in subtruncate, anterior angles obtuseand not visible from above,
POSte「Oi 「onesna「rowlyrounded;surfacesparsely,stronglyandsetiferouslypunctured
Withtheexceptionofanarrowmediansmoothlongitudinalpartthroughoutthelength
ofP「onOtum. Scutellumsubtriangular,withafewminutesuperficialsetiferouspunc_
tu「oSonthesurface. Elytrasomewhatdjlatedposteriadandtransverse(wjdth/1ength=
1・19),muchShe「ter(elytra/pronotum=0.76)butsomewhatbroader thanpronotum
(elyt「a/p「onotum=1.03);lateralsidesfeeblyarcuate,posteriormargjnshallowlyemar_
9inateat themiddle,posterioranglesbroadlyrounded;surfacesetiferouslypunctured
alleve「,thepuncturesmuchcloserandmuchcoarserthanthoseonpronotum. Hjnd
Win9Seachde9eneratedtoaminutelobe. Legsrelativelystout,profemurremarkably
thickened, providedwithasubtriangular toothnearapical thirdon theinner face;
P「otibiadilatedapicad,hollowedinbasalhaltontheinner faceandarmedwithfjve
Comb-liket「ansverserowsof finebrownishsetaewithinthehollow;meso_andmeta_
tibiaenormal;1st to4thprotarsalsegmentsstronglywidened.
、4 YasuakiWATANABEandLuoZhi-yi
Fjg.8. Lastthreeabdominalsternitesinmaleof Lat1/1'obiu111ta'm″'alSP nov・ Scale:1・0mm
11
Figs 9-11. Malegenitalorganof Lath・lobiu1nta'ma'alsp nov ventral view (9), lateral view
(10),anddorsal view (11). Scale: 0.5mm.
Abdomenelongate,nearlyparallel-sidedinbasalfivevisiblesegments,butabrupt-
y narrowed from 6th visiblesegment toanal end;surfaceof each tergitedensely
covered wjth fine superficial punctures and finebrownish pubescence; 6th visible
New Lat/11・obiul,1fromChina 55
Ste「nifeShallowlyemarginateatthemiddleo「posteriormarginandlonge]1jptjca11y
deP「eSSedatthemiddleinfrontoftheemargination,surfaceofthedepressjonpro_
VidedWithanumberofshortblackishsetaeoneachsideofthemedianpartwhjchjs
Ion9itudina11yelevatedinapicalhalf;5thvisiblesterniteslightlyemargjnateatthe
middleofposteriormarginandhorseshoe-shapedlydepressedbeforetheemargjnatjon,
Su「faceof thedepressioncoveredwithshort brownishsetaewhicharecoarser than
thoseontheotherparts.
Genital organ longelliptical andwellsclerotizedexcept for thedorsalsideof
median lobe. Medianlobebroaderbutshorter thanfusedparamere. Fusedpara_
me「easymmetricalandelongate,graduallynarrowedinbasal half and abruptly so
inapical half towardsapexand terminatedinasmall projectionwhichisventrally
Cu「Vedasseenfromlateralside;ventralsurfacebroadlyandlongitudinallydepressed.
DO「Salsideofmedianlobeprovidedwithawellsclerotizedplatewhichisstrongly
na「「owedapicad, leftmarginof theplategentlyarcuateandrightmarginbisinuate,
Withtheapexobliquelytruncatebutfeeblyemarginateatthemjddle.
Female. Similar ingeneralappearancetomale, but theist to4thsegmentsof
P「otarsiarenotsowidenedandthelastvisibleabdominalsterniteisproducedback-
wardsat themiddle.
Typeseries'. Holotype: , allotype: , near Bai Yun Falls on Wu-yan-1ing
Nature Protective Area, Tai-shun County, Zhejiang Province, China, 10_IX-1990,
Y.WATANABFleg. Paratypes: l 3 ,samedataasfortheholotype.
,
lsfl'1加r,on. East China.
Thepresentnewspeciesmaybeplacedinthegroupof L.,no11tlcolafromJapan
forreasonofitssmallbodysize,butcanbeeasilydistinguishedfromtheotherspecies
ofthegroupbyhavingadistinctsecondarysexualcharacteroftheabdomen.
ThespecificnameisgivenafterProfessorHiroshiTAMuRAof IbarakiUniversity,
Mite,whokindlycollaboratedwiththeauthorsinsearchingfor thisnewspeciesin
the field.
要 約
渡辺泰明' ?' 志叉: 中国、t??江省島岩l」f自然保護地域で採集され, た Lathrobium属の2新極. -
l990年に実胞された中H1l-同学術調合;によって, ll?江?、南部の島岩1買自然保護地域から採集された
Lathrobium属の2?iを検した結果, いずれも新f',ftiとl-ll定されたのでトー記のと.l,;り命名記波, した.
Lathrobium lmadatei Y. WATANABll et LUo
本極は, 体長,l?よび外部形態から同断すると, llイ、.から記,l れた L brachyptertm 、tに一致す
るが, 1stの1111部111・板にあら?)れる第二: 次性1'iおよび父尾器の形状によって, 既知のいずれの?1からも
区別することができる. f,fl名は中Hjl-同学lit調合i研究代表の東京l)・科lfi科大学の今立源太良教授に献
名した.
Latltrobium lamurai Y. WATANAB_l ct LU0
本種は小1111で, 体長から、ll断するとllイ一ら記成, した L. ,nontlcola 辞に含まれるが, 離は月?部
56 YasuakiWATANABEandLUoZhi-yi
腹板の第二:次性徴が顕著にあらわれること, および交尾器の癒合した側片先端部分が上反しているこ
となどの点で, 他種から容易に区別することができる. なお, 種名は今回の調査に-tiいてハネカクシ
の採集にご協力いただいた次城大学の田村消一志教授に献名した.
References
systemaljcstudyonthesubfamilyPaederinaeofStaphylinidaeofJapan(Eleventh
DAcHl,T., lg55
contrjbutjontotheknowledgeofStaphylinidaeofJapan). J.T,oyoU'll、'・,(7):303-328・
_ - 1957. ThestaphylinidfaunaofJapan. Ibid.,(11):166-250.
BERNHAUER, M., lg36. Neuhejten der palaearktischen Staphylinidenfauna II・ pubb・ MuS・ e'tt・
PietroRossi,14:303-325.
_ &K. SCHUBERT, 1912. Staphylinidae 111. /'1JUNK, W., &S. SCHENKLING (edS・), Co/eo-
pfc・,orumCata1ogus,pars40(pp.191-288). W.Junk,Berlin.
ScHEERpELTz, 0., 1933. Stap1、ylinidaeVII (Suppl. I). Ibid,Pa「SI29(PP・989-1500)・ W・Junk,
Berlin.
SHARP,D.,1889. TheStaphylinidaeofJapan. A,1nls.Mag.'lat.Hist.,(6),3:249-267[Pa「t6]・
provjsjonalchecklistofthefamilyStaphylinidaeofJapanI(Insecta:ColeOPte「a)・
sHIBATA,Y., lg76.
AnnualBtd1.NichidaiSanko,Tlokyo,(19):71-212. (InJapanese)
WATANABE,Y.,1984. ThebrachypterousstaphyliriitlbeetelsfromtheTOhOkuDist「let,NO「theaSt
Japan,wjthdescrjptjonsoffournewspecies. Me,1t natn.Sci. Mus., Tokyo,(l7):131-144・
_ 1g86. Threenewbrad、ypterousLat/1・,obium(Coleoptera,Staphylinidae)fromJapan・ Ko'ltyu,
Tokyo,54:688-696.
_ 1gg1 New specjes of the group of Lat1/・,obiun1polio,Is (Coleoptera, Staphylinidae) f「om
Shikoku,Japan. J.speleo/.Soc.Japan,16:29-37.
wu, c.F.,1937. Familystaphylinidae. Cata1()gus1,1secto・,ulnSinensiu'n、3:312-360. Fan Me-
morial InstituteofBiology,Peiping.