A New Species of the Genus Pterostichus (Coleoptera, Carabidae) from Mt. Shirakusa-yama in Gero-shi of Gifu Prefecture, Central Japan

2006·4.1 MB·

by  Sugimura, A

E/、・mi.T◆o(k、・().34(l):33-39,May20.2006
ANewSpeciesoftheGenusPte1,ostichus(Coleoptera,Carabidae) from
Mt.Shirakusa-yamainGero-shiofGifuPrefecture,CentralJapan
AkemichiSUGIMURA
282-19,Dokino,Kiyosu-shi,Aichi,452-0914Japan
Abstract A new speciesof macrocephalic pterostichinecarabidbeetle is de-
scribedfromGero-shiofGifuPrefecture,CentralJapan,underthenameofPte1'osttc/1lls
1/oJ11・
After thediscoveryofPte1-ostlchustoda1toyoshimaiSUGIMURA(2002,pp.91-99)
in2000fromMt.Kiso-koma-ga-takeoftheKisoMountainsontheeasternsideofthe
KisoRiver,hebegantosearchforotherpopulationsofmacrocephalicpterostichinesin
theneighboringareasonthewesternsideoftheKisoRiver incooperationwithhis
colleagues.Intheautumnof2002,afemaleofamacrocephalicpterostichinewasob-
tainedonthewesternslopeofMt.Shirakusa-yama, themountainlyingintheeastern
areaofGero-shiandabout50kmdistanttothewest fromMt.Ena-san,thetypelocal-
ityofPte1,ostichustodaitoda1.Atthefirstglance,thisspecimenseemedmoreclosely
related toPte1-ostichusuedaorun1MORITAet HIRAsAwA (1996, pp 27-30) from Mt.
IwozenandMt. Hakusanthanto t:) toda1MORITAet KANIE(1996, pp.163-167) in
viewoftheslenderbody,theobtrapezoida1pronotumandthenarrowedelytra1base.
However,amalespecimenobtainedinthenextautumnunexpectedlyhadaverybroad
body,subquadratepronotum,parallel-sidedelytraandpeculiarlyrobustaedeagus,and
waseasilydistinguishable fromall thealliedspecies.Uptothepresent, totallythree
males and seven females from thispopulationhavebeenobtainedin thisarea,and
theirmorphologicalcharacteristicsareverystable.Therefore, theauthorhasrecog-
nizedthepopulationfromMt.Shirakusa-yamaasbeingnewtoscienceandisgoingto
describeitunderthenameofPtel-ostlc11usshojli inthispaper.ThespecificnameSi
dedicatedtoMr.ShojiKAT0 forhisgreatcontributiontotheresearchof thePterosti-
chinecarabid faunainthisarea.
Theabbreviationsusedin thetableinsertedinthispaperareas follows: HW-
greatestwidth ofhead;PW-greatestwidthof pronotum;PL-lengthofPronotum
(measuredalongthemedianline);PA-widthofpronota1apex;PB-widthofp「onOta1
base;EW-greatestwidthofelytra;EL-greatestlengthofelytra.
further,hewishes toexpresshishearty thankstoDr.Shun-IChi
Beforegojng
UENooftheNationalScienceMuseum,Tokyo forhiscritical readingof themanu-
scrjpt.HejsalsoindebtedtoMr.RyojiToYosHIMAofNagoyaforhiskindhelpandad-
34 Akemichi SU(11MURA
viceinthisstudy.ThanksarealsoduetoMessrs.ShojiKAT0ofTsushima-shi,Aichi
PrefectureandNaoki ToDAofNagoya,andtoMrs.YorikoINAGAKlofYokkaichi-shi,
MiePrefecturefortheirkindcooperationincollectingthematerials.
Theholotypetobedesignatedinthispaperwillbepreservedinthecollectionof
theNationalScienceMuseum,Tokyo.
pfc「0Sf'ellMssitcillSUG1MURA,sp nov.
[Japanesename:Gero-ozu-naga-gomimushi]
(Fig.l-2)
Male. Length(measuredfromclypea1apextoelytralapices):16.30-16.81mm.
Humeral width: 4.34-4.44mm. 0thersignificantmeasurementsareshowninTablet.
Bodyratherflat;outlineofbodybroaderthanthoseinotheralliedspecies.Colour
darkbrown;headdarkerthoughthelabialandmaxillarypalpi, labrum,antennaeand
legsarelighter.
Headverylargeandvoluminous,apparentlywider than long, a little narrower
thanoralmostaswideasthewidestportionofpronotum;apicalmarginoflabrum
verystronglyemarginate;frontalsuturedistinct;clypeussparselyandirregularlypunc_
tatenearapexwithapicalmarginshallowlyemarginate,medic-apicalportionnarrowly
withmicrosculptureconsistingof finemeshes,1atero-basa1portions followedbythe
endsof frontal furrowssomewhatdepressedandratherdeeplywrinkled; frontal fur_
rowsveryshortandrathershallow,extending from frontalsutureandreachjngnear
post-eyelevel,veryweaklyarcuatelydivergent; theportionsbesidetheposterjorhalf
ofthe furrowsshallowlyandtransverselywrinkled;eyessmallandentirelyflat;tern_
porastronglytumid fromnecktothewidestportion,thenmoderatelyandrather lin_
earlynarrowedanteriad;lateralgroovesshort,deepandalmostlinear,extendjngfrom
alittlebehindthemid-eyelevelandterminatingfairlybeforetheposteriorsupraorbjta1
setae,slightlyconvergentbackwards;additionalgroovesshallowthoughdjs1jnct,ex_
tendingfromendsofeyesandadjoiningtheposteriorendsoflateralgrooves;anterjor
Supraorbitalsetaesituatedalittleinsidethelateralgroovesatpost-eyeleveloralittle
behindthatlevel;surfacebearingfine,shallowandirregularwrinkles,andsparselyand
miC「oSCOpiCaIly punctate, microsculpture on occiput consisting ofmeshes; genae
SmoothWithoutwrinklesonventralsurface;mentumtoothbifid;mentum
irregularly
W「inkle Submentumbearingseveralshallowandlongitudinalwrinklesalongtheapj_
Calma「9in;9ulashortlyandlongitudinallysulcateatthemiddle;gularsuturesvery
finethou9hdistinct,bothsidesofthesuturestransverselywrinkled;ventralsurfaceof
neckSpa「SelyPunctate,theportionsjustinsidegularsuturessparselywjthveryshort,
distinctandIon9itudina1wrinkles;mandiblesvery
long andstout, left one a little
Ion9e「thantheri9ht,somewhatsinuatenearbaseandstronglyhooked inwards at
aboutapical1/3,almostofthesamelengthandshapeinbothsexes(apjca11/2ofthe
leftonelackingintheholotype);antennaesubfiliform,ratioofeachsegment(I_xl)as
follows: - 1:0.51:0.87:0.85:0.81:0.79:0.73:0.66:0.62:0.57:0.69,2ndsegmentunisetose
NewPterostichusfromGero-shi 35
r
l l
i
b
a
Fig. 1. PterostichusshoJiiSUGIMURA,spnov.,fromMt.Shirakusa-yama;a:male(holotype);b:female
(paratype).
Table 1. MeasurementsofPterostichusshoJiiSUGIMURA,sp nov
Length(mm) PW/HW PW/PL PW/PA PW/PB PA/PB EW/PW EL/EW
b=Ho typeJ::)一一 664821 110098 '5523 'l12 22'41 10' 28 '1189 55'48
' ' ' ' '
に 630 l10 l54 l1 2'0 0' 9 122 5'2
601 102 l47 l2 2'7 1' 4 116 6'6
568 l01 l51 13 I32 117 118 '65
622 099 152 10 l30 119 121 l61
602 101 l54 13 l29 114 2'2 158
579 l01 '52 12 3'1 1' 7 2'1 6'3
657668 110050 '15445 '32 22''86 11'' 32 11''59 66'31
36 AkemichiSU(1lMUIし
orsometimesasetose.
Pronotum rather at,wider thanlong,nearlysquare,widestataboutapical1/5.1
(measuredalongthemedianline), feeblysinuatelynarrowedbasadandmuchbroader
thaninotheralliedspecies;pronota1apexalittlewiderthanbase,shallowlyandevenly
emarginate,bearingseverallongitudinalwrinklesalongthemarginalittleinsideapical
angles;apicalanglesacutelyprotrudingwithtipsverynarrowly rounded, andbasal
onesrectangularor feeblyacute;sidesalmoststraightlyconvergent fromthewidest
portiontoapicalanglesandfeeblysinuatelyconvergenttobasal t/4,thenalmostparal-
leledorvery feeblydivergent towardsthebase;pronota1basenotborderedL,weakly
emarginatemedially,obliquelyandalmoststraightlytruncatebesidetheemargination,
bearingrather longandlongitudinalwrinklesat themiddleofbasalmargin;anterior
marginalsetaesituatedalittlebeforethewidestportion,posterior onessituatedjust
beforeandalittleinsidethebasalangles;anteriortransverseimpressionratherdistinct
andposterioroneobsolete;medianlineshallowthoughdistinct,eachendnotreaching
anteriorandposteriormarginsofpronotum, theportionbesideapical2/3oftheline
bearingshallowandtransversewrinkles; lateralchannel rather wide,narrowestnear
thewidestportionofpronotum,theportionjust insideandalongthechanneldeeply
andsparselypunctate;basal foveaeveryshallow, ratherdenselypunctate,withirregu-
larwrinklesnearbase, feeblyarcuatelyconvergent forwardsandextendingbeyondthe
basal halfofpronotum;surfaceirregularly wrinkled,and ratherdensely andmicro-
scopicallypunctate,bearingmicrosculptureconsistingofirregularmeshes.
Elytra rather at, e1ongately subquadrate, distinctly broad and comparatively
short,widestataboutbasal5/9,almostparallelednearbaseandmoderatelyroundly
narrowed apicad, with shallow preapica1emarginations; shoulders distinct, rather
stronglyreected;basalportionsbesidescutellumweaklydepressed;elytra1apicesdi-
vide suturalanglesangulateandsometimesacutelyprotruding; innerplicahardly
visible;basalborderratherarcuateandreachingscutellarstrioIe;scutellumwithdeep
and longitudinal wrinkles; intervalsscarcelyconvexmediallyandsomewhatconvex
nearapices,microscopicallyandratherdenselypuncture and also with distjnct mj_
C「oSCulptureconsistingofmeshes; interval3withtwodorsalpores,anlerjoroneat
aboutbasal t/2,Posterioroneataboutapical l/5,eachporeadjoiningstria2;striae
Shallow,Striae1-2becomingshallowernearapicalends,striae3_
4and5_6respec_
tVielyJoiningjustbeforeapicalends,stria6sometmi esnotreachjngandslrja7never
「eaChin9thebasalborder;scutelalrstrioleratherlongandshallow,lyingonInterval1,
met:nSJOinin9St「ia1;mar9ina1seriesofpores12-15innumber,widelyspacedat
t emi de.
Le9SSlende「:do「SalSu「faceofalltarsismooth,scatteringsparsepuncturesnear
apicalma「9in;P「otibiaeSlightlybowedatapical1/3jnbothsexes;surfaceoffemora
hindCoxaeandtrochantersshallowlywrinkled
P「etste「numdeeplyand「atherdenselypunctateonlateralsjdes;presternalprocess
notbetdo「ed,Ion9itudina11ydepressedmedially,withapexratherobtuselyangulate;
P「ePSite「na「athe「deeplyanddenselypunctateonlyneartheprosternum;pronota1ep1_
New Pfe1・os/1c/1lls「romGcro-shi 37
Fig.2. MalegenitaliaofPte,・01.・tic/filss/1oJ11SUGIMURA,sp nov.,holotype;a-b,aedeagus:a,1eftlatera1
view;b dorsalview;c leftparamcre;drightparamerc;c-f,genitalsegment:c,ventral view; f,1cft
lateralview;g,maleterminalsternite.Scale:2mm.
pleura bearing short and transverse wrinkles; mesosternum shallowly and rather
sparselypunctate;mesepisternumdeeplyanddenselypunctate;metasternumpunctate
nearlateralsides;sternites3-4shallowlyandlongitudinallywrinkled,puctatenearlat-
eral sides; lateral portions ofsternites 5-7bearingshort and longitudinal wrinkles
alongapicalmargins;terminalsterniteratherdeeplyandsemicircularlydepressedbe-
tweenapicalsetae,andveryfeeblyandlongitudinallyraisedatthemiddleofdepres-
sion,bearingseveral longwrinklesalongthemarginoutsideapicalsetae,apicalmar-
gjnshallowlyemarginatemediallyandextremelyfeeblysinuateorshortlyandalmost
straightlyobliquebesidetheemargination,anddistinctlymarginatealon9theborder.
Aedeagusrobust,stronglybentinwardsataboutbasal t/3anddistortin9left-
wards,weaklycarinatelyconvexonthemiddleofventralsurface,apicallobeCOmPa「a-
t1ve1y1ong,wjthapexroundedandveryslightlycurvedrightwardsindorsalViewand
slightlyinclineddextrallyinfrontalview;rightparamereshort,noteton9ate,Withapex
roundedandratherstronglyproducedfo1wards,weaklybentinwa「dSnea「thebase,
sparselypunctateonlyontheapicalportionofoutersurface,innersurfaceandtheapi-
calportionofoutersurfacebearingmicrosculptureconsistingofmeshes;leftPa「arno「e
38 AkemichiSUGIMURA
wideandquadratewithcornersrounded,posteriormargincurvedinwards,roundlyand
rather deeply concavemedic-anteriorly, and shallowly posteriorly, with several
so
transversewrinklesabovetheposteriorcavity; genital segmentstrongly hooked in-
wardsatthebase.
Female. Length;15.68-16.76mm. Humeralwidth;3.45-3.80mm.Othersig-
nificantmeasurementsarealsoshowninTablet.
Bodymoreelongateandcomparativelyslenderer thaninmale.Ratioofeachan-
tennalsegment (I-XI)asfollows:1:0.53:0.76:0.83:0.83:0.83:0.76:0.70:0.66:0.59:0.72.
Headalittlewider or almostaswideasthewidestportionofpronotum.Pronotum
longerthanwide,apparentlyobtrapezoida1withbasemuchnarrowerthanapex,widest
ataboutapical1/5.4;sidesarcuatelyconvergent forwards,evenlyandsinuatelyconver-
genttobasal t/5,thenveryfeeblydivergenttowardsthebase;posteriormarginalsetae
situatedat alevelalittlebeforethebasalmarginofpronotum;basal foveaenotso
broadlyextending.Elytrae1ongatelysubquadrate,apparentlybroadened frombaseto
thewidestportion,moderatelyroundlynarrowedapicadwithpreapica1emarginations
deepandratherdistinct;shouldersalmostsmooth,notsostronglyre ected. Terminal
sterniteofabdomenshallowlyandtransverselydepressedatapical1/3,bearingseveral
shallowandlongitudinalwrinklesalongthemarginbetweentwopairsofsetae,with
apicalmarginroundlyarcuate.
Typeseries. Holotype: (3, Mt.Shirakusa-yama,ca. 1,000m in alt., Gero-shi,
GifuProf., l3~20-IX-2003,AkemichiSuGIMuRAleg.Paratypes:1!,samelocalityas
fortheholotype,14~25-IX-2002,RyojiToYosHIMAleg;1e,samelocalityasforthe
holotype,20~28-IX-2003,Naoki ToDAleg;1 ,samelocality asfor theholotype,
3~11-X-2003, Shoji KAT0 leg; 1 same locality as for the holotype,
,
11~26-X-2003, Akemichi SuGIMURA leg; Ie,same locality as for theholotype,
11-X~9-XI-2003, Ryoji ToYosHIMA leg; 1!,same locality as for the holotype,
19-IX~3-X-2004,Ryoji ToYosHIMA leg;2 ,samelocalityas for theholotype,
3~10-X-2004, Shoji KAT01eg; ld, same locality as for the holotype, 19~28-
IX-2005,AkemichiSUGIMURAleg.
Notes. Thisnewspeciesiseasilydistinguishable fromotheralliedspeciesby
havingthefollowingcharacteristics:1)bodyapparentlybroadinmale,2)pronotum
bearingdistinctwrinkles,3)medianlobeofmalegenitaliarobust,stronglybent in_
wardsataboutbasal t/3anddistortingleftwards,weaklyandcarinatelyconvexatthe
middleofventralsurface,withapicallobewellproduced.
要 約
杉村明道:岐阜県下呂市東部の白草山から発見されたナガゴミムシの1新種. _ 著者らは
2000年の秋に木曽山地の木曽駒ケ岳からキソコマオオズナガゴミムシpfc,・ost1ch,sted・,to、.oノ, ,-_
'na'を再発見したのち,木曽川西岸においてオオズナガゴミムシの調査を開始した.その結果,
2002年の秋に下呂市東部の白草山西斜面から1頭の雌のオオズナガゴミムシを採集した
この
個体は比較的細長い体型を有しており,近隣の恵那山から記録されたェナオオズナガゴミムシ
New Plot・ostlc/1tlsfromGero-shi 39
Pte,-ostlc/lustoda1よりもむしろ医王山と白山から記録されたゥェダオオズナガゴミムシPte,・os-
t,c/,usuedao・,,ー二近縁であると思われた. しかし, 翌年の秋に採集された雄個体は, 非常に幅
広い体形と太く特徴的な交尾器中央片を有していた. 詳細な比較検討の結果, これまでに採集
された10個体の特徴的な形質は, いずれも安定しており, 他の近緑のオオズナガゴミムシから
容易に区別できるので, ケ'ロオオズナガゴミムシPte・,ostlchuss/lojilSuGIMuRA,spnov.と命名し
て記 した.
References
MORITA, S., 2004. A new Pte,・os11c/1us(Coleoptera,Carabidae) fromthe Suzuka Mountains, Central
Japan. Elyt・,a,Tolkvo,32:29-33.
- &H.HIRAsAwA,1996. Macrocephalicpterostichines(Coleoptera,Carabidae)fromcentralHon-
shu,Japan. Ibid,24:21-30.
- &N. KANIE, 1997. Anewmacrocephalicpterostichine(Coleoptera,Carabidae) fromCentral
Japan. lbtd.,25:163-167.
SUGIMURA,S.,2002. AnewsubspeciesofPte1'osttchustodalMORITAetKANIE(Coleoptera,Carabidae)
fromMt.Kisokoma-ga-take,CentralJapan. Ibid.,30:91-99.
- 2005. A newspeciesof thegenusPte1・ostlchus(Coleoptera,Carabidae) fromMt.Fukube-ga-
lake,ChunoDistrictofGifuPrefecture,CentralJapan. Ibid.,33:641-647.