Two New Patrobine Carabid Beetles from Western Honshu, Japan

7 Pages·1995·6.6 MB·English

by  Kasahara, S

Elytra,Tokyo,23(2):289-295,November15,1995
Two New Patrobine Carabid Beetles from
WesternHonshu,Japan
Sumac KASAHARA
Nishifuna4-9-13,FunabashiCity,Chiba,273Japan
Abstract Twonewpatrobinecarabidbeetles,Apatr・obusodanaka1sp nov and A.
yamajiisp nov.,aredescribedfromwesternHonshu,Japan.Theformerspeciesbelongs
totheechigonusgroup,andthelattertothehikosanusgroup.
There occur two unnamed patrobine carabidbeetles belonging to thegenus
Apat・,obusinwesternHonshu,Japan.0neofthembelongsto theechigonusgroup.
ItwasfoundonMt.0e-yamainKyotoPrefecture,whichisthewesternmost locality
of thatgroupso far known.Theotheroneisamemberof thehikosanusgroup. It
wascollectedonnorthernmountainsinOkayamaPrefecture.Boththespeciesare,
however,clearlydistinguishedfromtheirrelativesbyseveralcharacteristicsandmust
benewtoscience. Inthisarticle, Iwilldescribetheformerspeciesunder thename
Apatrobusodanakaisp nov., and thelatterunder thenameA yamajiisp nov. The
abbreviationsusedhereinarethesameasthoseexplainedinotherpapersofmine.
Alltheho1otypestobedesignatedarepreservedinthecollectionoftheDepartment
ofzoology,NationalScienceMuseum(Nat.Hist),Tokyo.Theparatypesaredeposited
inmycabinet.
Beforegoingfurther,IwishtoexpressmydeepgratitudetoDr.Shun-IchiUENo,
theformerchiefoftheDepartmentofZoology,NationalScienceMuseum(Nat.Hist),
Tokyo,forhisencouragementandforreadingthemanuscriptofthisPaper.Thanks
arealsoduetoMessrs.KoichiNoJIMA,KenODANAKAandOsamuYAMAJI fo「thei「
kindsupplyingwithvaluablespecimens.
Apatrobusodanakaisp nov.
[Japanesename:0eyama-nurechi-gomimushi]
(Figs.1-2)
Descrjptjon. Length (measured from apex of labrum to apices of elyt「a)
86_8gmm;wjdth3.1_3.2mm.Darkreddishbrown,shiny;palpiandtarsilightreddish
brown.
Headmoderatelyconvex;eyesconvex,thoughnotprominent;9enaeaston9as
eyes,weaklyswollen; neckconstrictiondistinctly impressed and strongly Punctate
dorsad:frontal furrowsdistinct,arcuateoutwards,stronglypunctate;late「al9「coves
290 SumacKASAHARA
deep,extendingtobehind thepost-eyelevel;supraorbital areasand fronsconvex;
surfacesparselypunctateexceptonvertex;microsculptureinvisible,thoughwellvisible
onlabrum;antennaemoderatelylong, reachingthebasal fourthofelytra, relative
lengthsofscapeandsegments2-6asfollows: - 1:0.5:1.4:0.9:0.8:0.75.
Pronotumquadrate-cordate,moderatelyconvex,widestatapicaltwo-fifths,ca.
1.26timesaswideashead(PW/HW l24-1.28,mean t26),ca.133timesaswideas
base(PW/PBW l31-1.35,mean t33),1.24timesaswideas long; lateralmargins
gentlyarcuate,stronglyconvergentposteriadandslightlysinuatebeforebase;apical
Fi9.1. Apat'obusoda'1aka1sp nov., ,fromMt.0e-yamainKyotoProf. Scale3mm
Two NewPatrobinesfromWestJapan 291
marginalmoststraight,apicalanglesproduced,roundedat thetips;basalmarginas
wideasoraltttlewider thantheapical,straight, thoughsomewhat obliqueoneach
side,basalanglesrectangular,slightlyproducedlaterad;basal foveaedeep,strongly
and ruggedlypunctate;median linedeep,stronglypunctate inbasalpart;surface
strongly punctate in apical, basal and lateral areas, minutely punctate on disc;
microsculpturealmostinvisible.
Wings reduced. Elytraoblongsubovate, moderatelyconvex,widest at about
middle,ca.136timesaswideaspronotum(EW/PW135-1.37,mean t36),ca 2.8
timesaslongaspronotum(EL/PL2.76-2.81,mean2.79),ca.165timesaslongas
wide;shoulderswidelyrounded;lateralmarginsgentlydivergentfrombehindshoulders
tothewidestlevel,thenroundlyconvergenttowardsapices;scutellarstrictoshortand
punctate,arisingfrombasalpores;striaedistinctlypunctate,thoughthepunctures
becomefiner towardsapices; intervalsgentlyconvex,thoughalmost flat inapical
parts,sparselyandminutely punctate; interval 3with threeto four dorsalPores,
adjoiningstria3atbasal fifth,aboutmiddleandapicalfifth;microsculptureslightly
visible, formedbyfinetransversemeshes.
venter stronglypunctateonneckconstriction, pro-,meso-and metePisterna,
pro-andmesosterna, andabdominalsternites3-4,weaklypunctateandrugoseon
lateralsidesofsternites5-8;presternalprocessfurrowedatmiddle.
Aedeagusstronglybentatbasalthirdandalmoststraightlyextendingtoapexin
lateralview,apicalhalfgentlycurvedrightwardsindorsalview;apical lobeIon9er
thanwide,taperedtowardsapex,whichisratherpointed,thoughdullatthetip;inne「
sac containing three copulatory pieces, apical one long and heavily sclerOtiZed,
horn-shaped;paramereswideandthin,notproducedatapices.
Fjg.2. MalegenitaliaofApat1・obusodanakaispnov.,fromMt.0e-yamainKyotoProf. - a-b,
Aedeagus:a,1eft latera1view;b, dorsal view,basal partomitted;c leftparamere; d,「i9ht
paramere. Scale1mm.
292 SumacKASAHARA
Typeseries. Holotype:z,Mt. 0e-yama, KyotoProf.,2-X-1983,K.ODANAKA
leg.Paratype:19,samedataasfor theholotype.
Notes. ThepresentnewspeciesmayberelatedtoA. iwasakiiMORITA(1987,p.
36)andA hasemiyaMORITA(1990,p 35)bothdescribedfromGifuPrefecture,but
isdistinguishedfromthelattertwobyhavingdifferentconfigurationofmalegenitalia.
ThisspeciesisdedicatedtoMr.KenODANAKA,whoisthecollectorofthisinteresting
beetle.
Apatrobusyamag'iisp
nov.
[Japanesename:Yamaji-nurechi-gomimushi]
(Figs3-5)
Description. Length(measuredasintheprecedingspecies)8.8-10.2mm;width
3.2-3.8mm.Black,shiny;labrum,mandibles,antennae,femoraandtibiaedarkreddish
brown;palpiandtarsireddishbrown.
Headmoderatelyconvex;eyesconvex,moreor lessprominent; genaeshorter
thaneyes,gentlyswollen;neckconstrictiondistinctlyimpressedandpunctatedorsad;
frontal furrowsarisingfromclypea1pores,deeplyimpressed,divergentposteriadand
punctate; lateralgroovesdeep,extendingtobehind thepost-eyelevel;supraorbital
areasandfronsconvex;surfaceminutelypunctateandoftenwithasmallfoveainthe
middleoffrons;microsculptureinvisible;antennaemoderatelylong,reachingthebasal
thirdofelytra; relativelengthsofscapeandsegments2-6asfollows: - 1:0.5:1.4:
0.9:0.9:0.g.
Pronotumcordate,moderatelyconvex,widestat apical third,ca.13timesas
wideashead(PW/HW1.26-1.35,meant32),ca.1.5timesaswideasbase(PW/PBW
1.47-1.59,mean t52),ca.125timesaswideaslong(PW/PL123-1.27,mean t25);
lateralmarginswellarcuate,stronglyconvergentposteriadandslightlysinuatebefore
base;apicalmarginalmoststright,apicalanglessomewhatproduced,roundedatthe
tips;basalmarginnarrowerthan theapical,almoststraight, thoughratheroblique
oneachside,basalanglesobtuseornearlyrectangular,evidentlyangulate;basalfoveae
deep,stronglyandruggedlypunctate;medianlinedeep,stronglypunctateinbasal
part;surfacestronglypunctateinapical,basaland lateralparts,minutelypunctate
ondisc;microsculptureinvisible.
Wingsreduced. Elytraoblongsubovate,gentlyconvex, thoughratherflat on
disc,widestatmiddle,morethan t3timesaswideaspronotum(EW/PW132-1.40,
mean t33),ca 2.65timesaslongaspronotum(EL/PL2.56-2.71,mean2.65),ca.16
timesaslongaswide(EL/EW147-1.64,meant59);shoulderswidelyrounded,and
veryminutely dentate; lateral margins gently arcuate from behind shoulders and
roundlyconvergent towardsapices;scutellarstrictomoderatelylong,arisjng from
basalpores,stronglypunctate;striaefinebutdeep,distinctlypunctate, thoughthe
Puncturesbecomefinertowardsapices; intervalsgentlyconvex,minutelybutclearly
punctate; interval3with threeto fourdorsalpores,adjoiningstria3atbasal fifth,
TwoNewPatrobinesfromWestJapan 293
Fig. 3. Apat,・obusyamajiisp nov.,,f,fromMt.Yamanori-seninOkayamaPref. Scale3mm
aboutmiddleandapicalfifth;microsculptureslightlyvisible,formedbyfinetransverse
meshes.
Venter strongly punctate on neck constriction, pro-, meso- andmetepisterna,
mesosternum, lateral sides of pro- and metasterna, and abdominal sternites 3-4;
minutely punctate and rugoseon lateral sides ofsternites5-8; presternal process
distinctly furrowedatmiddle.
Aedeagusstronglybentatbasalthird,weaklycurvedupwardsinapicalhalf,apex
truncatein lateralview; apical lobeaslongaswide, obliquely truncate at apex, left
294 Sumac KASAHARA
Fjg 4. MalegenjtaliaofApatrobusyamaJ'uspnov.,fromMt. Yamanori-seninOkayamaP「ef・
_ a_c,Aedeagus:a,1eftlatera1view;b,dorsalview,basalpartomitted;c,apexofapical
copulatory piece exposed from apical orifice, lateral view; d, left paramere; e, ri9ht
Scale1mm.
paramere.
Fig. 5. MapshowingthedistributionofApatrobusspp. inOkayamaandadjacentprefectures.
Black circles, A yamaJ'ii sp. nov; open circles, A. nishia、l'aku''ae (HABU). - 1, Mt.
Kenashin-zen,Shinjo-son,OkayamaPref;2,Mt.Yamanori-sen,Chuka-son,OkayamaPref;
3, Kurami, Kamo-cho,OkayamaPref;4, Akawase, Kamisaibara-son,Okayama Prof.; 5,
Wakasugi-toge,Nishiawakura-son,OkayamaPref;6,Yako-dani,Chizu-cho,TottoriProf.
TwoNewPatrobinesfromWestJapan
295
ma「9ingentlyemarginate;innersaccontainingtwocopulatorypiecesjnapjca1thjrd,
apicalonespindle-shaped,withtheapexformedbyabundleofnumerousspines;
Paramereswide, triangular,apexdistinctlyprolonged.
Type series. Holotype: Mt. Yamanori-sen, Chuka-son, Okayama pref.,
,
15-IX-l994, 0. YAMAJI leg. Paratypes: 3 , same locality as for theholotype,
21-VI-1992,0.YAMAJIle9.;1 2 ,samelocality,10-IX-1994,S.KAsAHARAleg;
,
I 1 Mt.Kanashi-zen,Shinjo-son,OkayamaPref.,29-V-1993,0.YAMAJl leg;
, ,
19,Samelocality, l4-V-1994,0.YAMAJIleg; lcl',1e,samelocality,1-VI-1994,K.
NOJIMAle9.;l 6 Kurami,Kamo-cho,OkayamaPref.,26-IX-1992,0.YAMAJlleg.
, ,
Notes. Thepresent newspeciesresemblesA nlshiawaku,ae(HABU)(1980,p.
47)in9enera1appearanceandoccursinacloseproximity,butisclearlydiscriminated
fromthelatterbypunctateintervalsofelytraanddifferentconfigurationofmale
9enitalia.ThespecieswasnamedafterMr.0samuYAMAJI,whoiskeenlyinvestigating
thecoleopteranfaunaofOkayamaPrefecture.
要 約
笠原須磨生:本州西部産ヌレチゴミムシの2新種. - 京都府の大江山で発見されたオオェャマヌ
レチゴミムシApatrobusodanakaiと,岡山県北部の山地に分布するヤマジヌレチゴミムシAyamaJ・iiを
記載した.前種はェチゴヌレチゴミムシ群echgionatsgroupに属し,本群の分布域のなかでもっとも西
に分布するものである.一方,後種はヒコサンヌレチゴミムシ群hikosantlsgroupに属し,近似のニシ
アワクラヌレチゴミムシAntshiawakurae(HABU)と分布域を接しているが, 上翅間室に点刻のあるこ
とや,雄交尾器の形態が相違していることで明らかに区別できる.
References
HABU, A.,1980. OnenewPat1・obus(Apat1・obus)speciesfromOkayamaPrefecture,Japan(Coleoptera,
Carabidae). Ent.Rev.Japan,Osaka,34:47-50.
- & k. BABA, l962. Twonewspecies of Pat1・obus from Niigata Prefecture, Japan(Coleoptera,
Carabidae). Kontyu,Tlokyo,30143-147.
MORITA,S.,1987. AnewpatrobinecarabidbeetlefromcentralHonshu,Japan. Elytra,Tokyo,15:36-40.
- 1990. AnewalpinepatrobinecarabidbeetlefromcentralHonshu,Japan. Ibid.,18:35-38.