A New Oreocarabus (Coleoptera,Carabidae)from the Qinling Mountains in Shaanxi Province,Central China

4 Pages·1993·2.2 MB·

by  Imura, Y

E/、,t,・a、Tokv(1、21(2):379-382.Nov.15,1993
A NewOreocarabus(Coleoptera,Carabidae) from theQinling
MountainsinShaanxi Province,CentralChina
Yuki iMURA
Shinohara-cho1249-8,Kohoku-ku,Yokohama 222Japan
Abstract A new speciesbelonging to thesubgenus 01-eocalabtl.・l of thegenus
Ca,・abtls (s ial )isdescribedfromtheQinlingMountainsunderthenameofCa,・a加.l
(01・eo(,al・a฀11s lie- a lan1,ssp nov.
After thecompletionofmypreviouspaperontheCarabidBeetlesoftheQinling
Mountains(IMuRA,1993,Elytra,Tokyo,21:363-377), Iwasabletoexaminesomead-
djtjona1materialsfromthesamemountainrange through thecourtesyofMr.Wake
KITAwAKl. Thecollection contains aremarkablenew speciesof thesubgenus0'eo-
carabus, and Iamgoingtodescribeit in the followinglines. Theabbreviations used
hereinarethesameasthoseexplainedinmypreviouspapers.
Beforegoingfurther, IwishtoexpressmygratitudetoDr.Shun-lobiUENoofthe
National Science Museum (Nat. Hist), Tokyo, for reading themanuscript of this
SpecialthanksareduetoMr.WakeKITAwAKl,Osaka,whokindlysubmitted
paper.
thespecimenstomeforstudy.
Carabus(0reoca,abus) kitawakianusIMURA,sp nov
(Figs.1-6)
Length:24.6-29.2mm(fromapicalmarginofclypeustoapicesofelytra).
Fairlylargespecieswithexternal featuressimilar tothoseofC.(0.)1'eiffel・lanus
BREUNING,butmarkedlydifferent fromitinthestructureofmalegenitalia.
Blackwith faintcopperylustre. Marginal areasofelytrasometimeswith faint
purplishlustre. Appendagesblackexcept for palpiandantennaewhicharealittle
reddish.
HeadasinC.1・eiffe・lianus,buttheantennaearesomewhat longer,alwaysextend-
ingto themiddleofelytra inmale; hairlessventral depressionsofmaleantennaere-
cognisedfromsegment5to9,whiletheyarerecognised fromsegment 5 to 8in C.
1・eitterlanus; median tooth of mentum longer andmoresharplypointed at theapex
than in C.1・eitte・,1anus. Pronotum also asin C 1・eltte・t1anus, but the basal foveaeare
usuallymoredeeplyconcavethoughverysmall, and thehindanglesareusuallymore
sharplypointed;number ofpronota1marginalsetaeisconstantlytwooneachside,
onenear thewidestpartandtheotherslightlybeforehindangles;PW/HW141-1.56
(M I 47), PW/PL 1.19-1.34 (M I 27), PW/PAW138-1.55 (M I 44),PW/PBW 1.19-
380 Yuki IMURA
Figs.1-2. Ca''ablls(0''eo('a''abus)kitawakiantlslMuRA,sp nov., fromZhouzhi Xian, shaanxj
Province,CentralChina;1, 1; (holotype);2, 0(allotype).
1.34(MI.27),PBW/PAW1.08-1.26(MI.14). Elytraslenderer,lessstronglyconvex
above,withthewidestpartsituatedalittlemorebackwards(ataboutapicalthjrd),and
withshoulders moreeffaced incomparisonwith C reitterianus; EW/PW 143_l 65
(MI55),EL/EW1.63-1.78(MI72);sculptureveryfinelyimpressedthoughobvjous_
lvrecognisedtobeheptap1oidhomodyname,witheachintervalmuchmoreweakly
raised than in C reltterlanus. Metacoxa trisetose. Sternalsulcicompletelyandprom_
inentlycarved. Legsalittlelonger thanin C1・eitterlanus.
Malegenital organbasicallysimilar to that of C reitterianus, butconsiderably
different from thelatter in details. Aedeagusrathersmall,about four-tenthsaslong
aselytra,short, thick, andstronglyarcuateatmiddle,v、1iththeright lateralmargjn
stronglyconvexlateradatabout themiddleandratherstronglyconcavetherefromto
apex insubdorsal view;apical lobeshort, robust,andgently hookedventrad wjth
broadlyrounded tipwhichisstronglydepresseddorso-laterad; ostium lobeabsent;
ligula,orbasalsclerite,alittlelargerthaninCreitte,1anus, formingawelldeveloped
patch of pigmented granules; aggonoporiusstrikinglydifferent from that of c rel't_
terlanus,beingstronglypigmentedandsclerotizedto formapairoftermjna1plates,
eachofwhichisoblonginshape. Femalegenitalialessspecialised,withouter plate
ofvaginalapophysisnarrowandalmost transparentexcept forthe1ongjtudjna1mjd_
linewhichisPi9mentedandalittlesclerotized,innerplatevestigial,not remarkably
different from thoseof C reitterlanus.
T、peso''1es. Holotype: ,near Houzhenziat thesouthwesternpartofZhouzhj
、'、、c、v ()・/e(、,(,a・/.111sf1-omtheQinlingMountain 381
Fjgs 3_6 Malegenitalorganof (、al-ab1l.・l (()1・e(1(11'?1/)11s) ita、、akla'1111.' IMURA,SP nov., f「om
zhouzhj xjan,shaanxiprovince,CentralChina,3,aedeaguswithfullyevertedendophallus
(rjghllaleralview)、4,apicalpartofaedeagus(rightlateralview):5,ditto(dorsalview);6、
apicalpariofendophalIus. Scale:2mm for3,1mm for4-5.
xjan,Shaanxjprovince、CentralChina,V、Vll-1993(NSMT). Paratypes(including
allotype):6(j',j,28o ',samedataasfortheholotype,incoll.Y. IMuRA, K. MIZuSAWA,
and W. KITAwAKl.
Notes. Aswasshe、vn in theprecedinglines, thisnewspeciesisconsideredtobe
closelyalliedtoCa・labus(01・eo(・al・abus)1・(.1tt(1・lt1/111shithertoknownfromSichuanand
Gansu However, thelatterhasalsobeenrecordedfromtheQinlingMountainsvery
recently. Thetwo femalespecimensknown,whichwereconsidered tobelon9to the
nominotypica1subspeciesfromtheexternal features,wereobtainedfromratherhigh
altjtudjnalarea(ca 2,000mmheight)ofBaoji Xian,、、,hich isabout 60kmdistant
tothenorthbywest fromt1、etypelocalityo「(、.k1ta、、'akiat11l?nov. Further investiga-
tjonjsneededtoproveif thesetwospeciesoccursympatrica11yorareSegregatedon
thesamemountainrange.
Anotherspeciesbelongingpresumablytothesamespecies-group,namely,C.(0.)
o/1s/1t'mat'anjlsDEUvEhasbeenknownfromHubei(Shennongjia、situatedatthewestern
partoftheprovincenear theSichuanborders)and thepresent newspeciesmust be
literature, these
compared with lt. Although I know theHubei speciesonly from
specjesappearreadilydiscriminatedfromeachotherbymuchdifferentlyshapedaede-
aga1apex. Inaddition,suchcharactersaspositionofthehairlessdepressionson the
ventralsurfaceofmaleantennae(recognised fromsegment5 to8in C o/1shimala1'L1?,
5to9inCkita、,l,akiamls), numberofmarginalsetaeofpronotum(twoorthreemedic-
na) anteriorlyinC.o/7s/ll,nata-.f,constantlyoneinC.・「lall'a・aI川1.i', ad sculpturl cond
382 Yuki IMURA
tionofelytra(triploid!accordingtotheoriginaldescriptioninC.ohshjmalanus,hep_
tapIoid inC kitawakianus)seemtobediagnostic.
ThisnewSpecieswasobtained,togetherwithCa,・abustltanusBREUNING,byusing
bait traps.
要 約
月二村有希: 秦 山脈から発見されたミヤマオサムシ亜属の1新種. - 中国陜西省南部の秦栫山A脈
から得られたミヤマオサムシ亜属0reocarabusの1種を新種と認め, Carabus(0reocarabus) kita-
、vakianus IMuRA, sP nov. と命名して記載した. 四川省と目一蘭省から知られている C. (0.) reit-
terianusBREuN[NGに近いが,やや大型で細長く,触角がより長く,上翅間室の隆起がはるかにSjい
まか, 陰茎の形態が大きく異なり, さらに内袋先端部の射精孔縁膜に強い硬化と色素沈着がみられ頂
販を形成する, といつた形態的相違を有するので識別は容易である. C reitterianusのほうも最近に
;i:って宝113 ・秦ﾌ 山脈高所から記録されているので, 同山脈に近縁の2種が生息していることにな
る. 本種はまた, 湖北省神表架から記載されているC.(0.)ohshimaianusDEuvEにも近いと思われ
るが, 両者は陰茎先端の形態において大きく異なり, 触角順面にある無毛M]陥部の位置や前 背板
、ll縁の剛毛数, さらに上 彫刻の形態にも違いがみられる. 本新種は, 同亜属中の最大種, C. (0.)
titanus BREuNING とともに, 周至 南西部から得られたものである.
References
BREuNING,S.,1932-'37. MonographiederGattungCarabusL. Best.-Tab em-.Co/copt., (104-110):
1-1610,41pls. Reitter,Troppau.
DEuvE,Th.,l988. TroisespecesnouvellesdugenreCarabusLINNE,delaprovinceduHubei,Chine
(Coleoptera,Carabidae). L'entomotog・iste,44:323-327.