A New Macrocephalic Species of the Genus Pterostichus (Coleoptera, Carabidae)

5 Pages·1998·4.1 MB·English

by  Morita, S

E、l・t,-a.'fok、・o、26(l):69-73.May15、1998
ANewMacrocephalicSpeciesoftheGenusPterostlchus
(Coleoptera,Carabidae)
SeijiMORITA
Moloazabu1-3-28-405,Minato-ku,Tokyo,106-0046Japan
and
Yoshiro KURosA
KudanzakaHospital、Chiyoda-ku,Tokyo.102-0074Japan
Abstract AnewmacrocephalicpterostichinccarabidisdescribedfromtheAbc-
loge,centralJapan、underthenameofPte・,ostlchusto、,oda1.Itismainlycharacterizedby
thelongitudinalridgeontheanalsterniteinthemaleandtumoredaedeagus.
Inrecentyears, thePte1-ostic/11ls fauna,especially theso-calledmacrocephalic
forms,ofJapan,hasbecomegraduallyclarifiedbyardent friendsofours.Theseresults
werealreadyreportedinseveralseparatepapers(e.g.,KASAHARA,1985;KASAHARA&
ITO, l987;MORITA& HIRAsAwA,1996;MORITA&KANIE,1997),whichincludedthe
discoveryofanew subgenus. Thepurposeofthepresentpaper istoaddonemore
specieswhichwasdiscoveredinShizuokaPrefecture,CentralJapan.
The abbreviations used herein are as follows: HW-greatest width of head;
greatestwidthofpronotum;PL-lengthofpronotum,measuredalongthemid-
pW_
1jne;PA_widthofpronota1apex;PB-widthofpronota1base;EW-greatestwidthof
elytra; EL-greatest lengthofelytra;FL-lengthofmetafemur;ML-lengthofmeta-
trochanter;TL-lengthofhindtarsus;M-arithmeticmean;H-holotypeof tovoda1;
NSMT -Nationa1ScienceMuseum(Nat.Hist ),Tokyo.
Beforegoing further,wewish toexpressourdeepgratitude toDr.Shun-Ichi
UENooftheNationalScienceMuseum(Nat. Hist),Tokyo, forcriticallyreadingthe
orjgjna1manuscriptof thispaper. 0ur thanksarealsoduetoMessrs.KatsuoHIRAI,
KojiTOYODAandKeiichiMATSUMOTOforsupplyinguswithimportantmate「ia1.
PterostichustoyodaiMORITAetY.KUROSA,sp nov.
[Japanesename:Hime-ozu-naga-gomimushi]
(Figs.1-7)
Length:12.9mminH,12.1-12.9mmin4 (fromapicalmarginofclypeusto
70 SeijiMORITAandYoshiroKし'ROSA
Fig. 1. Pte・,ostlchusto、・oda1MORITAetY.KURosA,sp nov., fromtheAbe-to9e
.
apicesofelytra).
colourdarkbrown;headmoreor lessdarker thanhindbody;appendagesdark
brown. Body flat and elongate. Head very large, alittlenarrower thanPronotum;
pw/Hw 1.10inH, 1.05-1.08(M1.07)in4 ; frontal furrowsshort,shallowandal-
mostparallel;genaestronglyconvex;eyesvestigialinH,veryslightlyconvexin2 ;
lateralgroovesdeep,straight,andslightlyarcuateinwardsattheposteriorpart,and
withnoadditionalgroove;mentumtoothbifidandwithapairofsetae;mentumwitha
deepconcavitywhichhasasmallpitatthebottomoneachside;smallroundedPitsit-
uatedoneachsideatthemeetingpointofgularsutureandbasalmarginofsubmen-
tum;submentumwithtwopairofsetae;mandiblesverylongandstronglyhookedat
apices; relativelengthsofantennalsegmentsas follows:- I:II:III:IV:V:VI:X1-
NewMacrocephalicSpeciesoftheGenusPte stichus 71
2
a , ,
b
Fjgs.2_7. PterostichustoyodaiMORITAetY.KURosA,spnov.,fromtheAbe-to9e. - 2, AnalStemite
;3,aedeagus,leftlateralview;4,aedeagus,obliqueleftventro-latera1view;5,apicalpa「tof
jn
aedeagus,ventralview;6,rightparamere,leftlateralview;7,leftparamere,elftlateralview.(Scale:
lmm,afor2;bfor3-7.)
72 SeijiMORITAandYoshiroKUROSA
1:0.54:0.97:0.83:0.82:0.80:0.78inH,1:0.49:0.87:0.79:0.77:0.73:0.74in3 ;
antennalsegment2withonesetaonventralside;microsculpturecomposedofWide
meshesinH,irregularmeshesin
.
trapezoidal, flat andwidestat about 1/5 inH,1/10 in (meaSu「ed
pronotum
alongthemedianline);PW/PL162,PW/PA1.l7,PW/PB139inH;PW/PL152-
163(MI56),pW/PA1.06-1.ll (M1.09),PW/PB138-1.45(M I42)in4 ; apex
widelyemarginateandnotbordered;PA/PB124inH,126-1.35(MI30)in4 ;
sides slightly arcuate in front, shallowly sinuate a little before hind an9leS; base
stronglyemarginateatmedianpart,obliqueoralmoststraightinsideeachhindan9le;
apicalanglesstronglyproduced,pointedatthetipsandwithfinepunctures;hindones
rectangularinH,orsharpin ;anteriorpairofsetaeinsertedalittlebeforethewidest
part,posterioronesalittlebeforeandinsidehindangles;anteriortransverseimP「eS-
sjonobsoletejnH,distinctonthedisc in ;medianlineclearly impressed, reaching
neitherapexnorbase;basal foveaeratherdeep,linear,andwithfinepuncturesandfine
transverseljnes;microsculpturecomposedofwideortransversemeshesbutpa「tiaIly
djsorderedinH,andwidemeshesonthebasalpartandirregularonesonthediscin
.
Elytraflatandob1ong-subovate;shouldersslightly roundedatthetips;EW/PW
1.13,EL/Ew163,EB/EW0.80inH;EW/PW1.13-1.15(M1.14),EL/EWl55-1.67
(M I60),EB/Ew 0.70-0.75(M0.72) in4 ;sidesalittledivergent frombehind
shoulderstothewidestpart,moderatelyarcuateinapicalpartsandwithwideandShal-
lowpreapjcalemarginationinH;in ,preapica1emarginationveryshallow;epipleu「on
graduallynarrowedtowardsapex;innerplicavisible;apicesseparatedfromeachother;
apexmoderatelyrounded;basalborderveryslightlyarcuate;basalporesituatedatthe
proxjma1endofstria1;intervalsslightlyconvex;striaeratherdeepthroughout,weakly
crenulate, but becoming indistinctatapicesinH, almostsmooth throughout in ;
scutellarstrjoleveryshortandsituatedoninterval1,andusuallyjoiningstria1,「a「ely
freeat theend; twodorsal poressituatedonstria2,anteriordorsalporesituatedat
aboutbasal 2/5andposterioronesituatedataboutbasal3/4inH, anteriorPO「eat
aboutbasal2/5-1/2andposterioroneataboutbasal3/4 4/5 in 4 ;marginalseries
composedof14poresinH,13-14poresin ;microsculptureclearly impressed,COn-
sjstjngofpolygonalmeshesbutpartiallydisorderedinH,polygonalmeshesin
.
Genae with several transversewrinkleson ventral side; prepisternum, p「oSte「一
num,mesepisternum,sidesofmetasternum,metepistemum,andsidesofstemiteS1
and2sparselyandfinelypunctate;in,3analsternitewidelydepressedbetweenaPal「
ofsetae,andwithlongitudinalridgeatthemiddleandwithashallownotchatthetip;
,analstemitewidelydepressedbetweenapairof innersetaeandslightlyema一「
jn
ginateatthetip.
Legsslender; tarsismoothondorsalsidein and ;TL/HW 0.95 inH, 083-
0g7(M089)in4 ; in ,ventralsidesofprotarsiwithoutadhesivehairs(cf.HABU,
1961,pp.10_ll);protibiaeslightlybowedin and ,almostsmoothinH,sulcateon
basalhalvesofexternal facesin ;mesotibiae1ongitudina1lystrigoseondorsalSu「face
between a level near basal 3/10 and apices in and ; metatibiae1ongitudina11y
NewMacrocephalicSpeciesoftheGenusPterosticlltls 73
strigoseondorsalsurfacebetweenalevelnearbasal2/5andapicesin(3and ;meta-
trochantershortandwithroundedapex;ML/FL0.39inH,040in
.
Aedeaguselongateandstronglybentatbasal third; ventraledgewithatumorat
aboutbasalthird;apicalpartinclinedtotheright;apexroundedinventral view.Right
paramererobust,straightandwithroundedapex;leftonewide.
Typeseries. Holotype: d 2-VI-l996, K.TOYODAleg.(NSMT).Paratypes: 1?,
24-VII-1994,Y.KURosAleg;1(i 2-VI-1996,K.MATSUMOTOleg;1?,1-VI-l997,
K.TovoDAleg;1 ,6-VIII-1997,K.HIRA11eg.
Locality. Abe-toge,about l,380malt.,Shizuoka-shi,ShizuokaPrefecture,Cen-
tralJapan.
Notes. Thisnewspecies isseparablefromtheothermembersoftheso-called
macrocephalic formsofpterostichinecarabidsbyhavingacombinationofthe follow-
ing characters: 1) anal sternite inmalewitha longitudinal ridge at themiddle, 2)
aedeaguswithatumorataboutbasal third,and3)tarsismoothondorsalside.
Onlythesinglemaleknown,whichwasdesignatedastheholotype,wasalready
dissectedwhenwereceivedit;itsinnersacwas,probablyirregularly,evertedfromthe
aedeagus,andtheapicallobeoftheaedeaguswascoveredwiththemembraneouspart
oftheinnersac. It is, therefore,noteasytoexaminetheshapeofapical lobeinboth
lateralanddorsalviews.
要 約
森m識fJ・黒佐義郎:静岡県産オオズナガゴミムシの1新種. - 静岡市の北に位置する安
信一峠から発見されたl新種, ヒメオオズナガゴミムシPte・loslichustovodaiを記1波した. この新種
は, 雄11?端節に縦隆' を備えること, 険茎下面が膨れること, 付節背面が平骨i であることで, ほ
かのいわゆるオオズナガゴミムシと容易に識別される.
References
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//lao'-ogellysBATES. Ak:itu.Kyoto,10:10-11.
KAsAHARA,S., 1985. Two new pterostichinecarabids fromthe IslandofShikoku, SouthwestJapan.
Elyt,・a,To(kyo,13:49-57.
- & Y. ITO,1987. AnewPterostichus(Coleoptera,Carabidae)fromtheupperhypogeanzoneof
centralShikoku,SouthwestJapan. Kent、u, 「okyo,55:l39-l45.
MORITA, S., & H. HIRAsAwA,1996. Macrocephalicpterostichines(Coleoptera,Carabidae) fromcentral
Honshu、Japan. Elytta.Totk、,o,24:21-30.
- &N. KANIE, 1997. A new macrocephalicpterostichine (Coleoptera,Carabidae)fromCentral
Japan. Ibid.,25:163-l67.