Three New Blackish Species of the Genus Podabrus (Coleoptera, Cantharidae) from Central and Northeastern Honshu, Japan

6 Pages·1999·5.9 MB·English

by  Takahashi, K

Elyt1・a, tokyo,27(1):70-75,May15,l999
ThreeNewBlackishSpeciesoftheGenusPodabrus
(Coleoptera,Cantharidae) fromCentraland
NortheasternHonshu,Japan
Kazuhir0 TAKAHASHI
239-11,Nagamochi,Hiratsuka,259-1217Japan
Abstract Threenew blackishspeciesofthegenusPodab,・itsaredescribed from
centralandnortheasternHonshuinJapan.0neofthem,namedPodab1・fis(As1opodab1・fis)
kusa,na1,obviouslybelongstothoR(A)kado、、・aki1group.Theremainders,namedP(A)
,11asato1andP.(A)ts1lc/11'kau,al, tom、twonewlineagesintheP.(A)Iliaci/e11ttlsgroup,
becauseoftheirpeculiarmalegenitalia.
Introduction
ThegenusPodabrusWESTWOOD,1840comprisesthelargestnumberofspeciesin
theJapaneseCantharidae. ThesubgenusAs1opodabrusWITTMER,1982occupiesthe
most partof this genus,61specieshavingbeen knownup tothepresent fromthe
Japaneseterritory(TAKAHAsHI,1998).Ofthese,severalspeciespossessalmostblack
elytra. Theyclosely resembleeachother ingeneralappearance,thoughconsistingof
variouslineages fromthesystematicviewpoint.
Inthispaper, Iamgoingtodescribethreenewblackishspeciesofthesubgenus.
Oneofthemdoubtlessresemblesf)(A)kadov、,akiiNAKANEetMAKINo,1989,sothatit
shouldbelongtotheP.(4.)kadowakiigroup.Theremainderscertainlybelongtothe1)
(A)macilentusgroup inviewofgeneralconformationoftheirmalegenitalia. How-
ever,thegenitalicorgansaresopeculiarthatnocloserelativesofthemareknownat
thepresenttime. IwillthereforerecognizetwonewlineagesintheP(A)macilentus
group forthetwonewspecies.
Beforegoing further, IwishtoexpressmydeepgratitudetoProf.Dr.Masataka
SAT0ofNagoyaWomens' University forhiscontinuousguidanceonmystudyofthe
Cantharidae,andtoDr.MasatoshiTAKAKUwAoftheKanagawaPrefectural Museumof
NaturalHistory,0dawara, forhiscriticallyreadingthemanuscriptofthispaper.Cor-
dial thanks are also due to Messrs. Masato HINAKURA ofTokyo, Isao KIRIYAMAof
Gifu,IsaoMAKIBAYAsHIofOhmiya,KouichiSAT0ofUtsunomiya,HaruoTAKIzAwAof
Hasuda, Koji TsucHIKAwAof YokohamaandShigeo TsuYuKl ofZushi for their kind
helpinprovidingmewithvaluablematerials. Iwouldliketodedicatethisshortpaper
tothememoryofthelateDr.KeiichiKUsAMAforhiskindguidanceintheentomology
whileIstayedinShizuokaCityabouttwentyyearsago.
NewPodabl・11sfromCentralandNortheasternHonshu 71
Materials and Methods
Themalegenitaliadescribedinthispaperweredippedin fo%KOHsolutionat
gO°C forabout10minutesto removemembrane,protein,etc. After that, theywere
sketchedin 50%glycerin.
Typedepositories. Alltheholotypestobedesignatedinthispaperarepreserved
inthecollectionoftheKanagawaPrefecturalMuseumofNaturalHistory,0dawara.The
paratypesarepreservedinthecollectionsofDr.M.SAT0,Mr.1.KIRIYAMAandmine.
Descriptions
Podabrus(4siopodabrus)kusamaispnov.
[Japanesename:Kusama-kubibosojokai]
(Figs.1,4)
Male. Relativelysmallspecies.Bodyalmostbrownishblack;headbeforeeyes,
antennalsegments1-2,bothsidesofpronota1margin,prosternum,coxae,and inner
sidesofforefemoraandforetarsiyellowishbrown.Elytrasomewhatlustrous.
Headscatteredwith finepuncturesin front,closelypunctatebehindeyes,and
somewhatrugoselysoonneck.Antennaerelativelyshort,reachingbasal fourthofely-
tra;comparativelengthofeachsegmentasfollows:- 1.87:1.7:1:1.25:1.28:1.2:1.2:
12: 1.28: 1.22: 1.43.
.
pronotum relatively narrow, clearly narrower than head, widest at middle;
pw/Hw0.81(0.81-0.92),PW/PL1.04(0.93-1.07),PW/PA t4(1.34-1.57),PW/PB
1.08(1.06_1.13);surfacecloselycoveredwithsmallpunctures, thoughthepunctures
becomesomewhat largeronbasalhalfandinanteriormarginalarea; frontalandbasal
marginsnearlystraight,lateralonesslightlysinuate,anterioranglesalittleangulate
andposterioronesslightlyprominent;discwellelevatedexcept for lateralmar9ins,
thoughslightlyandcircularlyconcaveinbasalhalfElytrarelativelyshort,widerthan
pronotum; EW/pW l44 (1.36-1.56), EL/EW3.21(3.05-3.27). Front andmiddle
clawscleft,innerteethofhindonesenlarged,triangularlyprojectedapicad.
Malegenitaliasomewhatelongate;1aterophyses1ongandslender,withrounded
apjces;ventralprocesssomewhatlong,withclearlyroundedapices,innersidesslightly
concave;dorsalprocessveryshort(Fig 4).
Length:4.4(4.4-5.l)mm;breadth:0.9(0.9-1.1)mm.
Female. Notdiscriminatedfromthoseofotherrelatedspecies.
Holotype: (5,Mugikusa-pass,Mt.Yatsugatake,NaganoProf.,21-
pcseries.
vIl_1990,s.TsUYuKl leg.Paratypes:1 Mt.Tsubakuronoatama,Nirasaki-shi,Yama-
,
nashiprof.,2_vIII-1986,S. TsuYuKl leg;1 Nigorigo,Osaka-oho,GifuProf.,28-
,
VII_1986,1.KIRIYAMAleg;3 ,samelocalityasabove,31-VII-1992,1.KIRIYAMA
leg;3 ,samelocalityasabove,1-VII-i997,1.KIRIYAMAleg;7 ,Mt.0ikeyama,
Kamj_mura, Nagano Pref., 1-VI-1998, 1. KIRIYAMA leg; 1 , upper St「earn above
Iwanadome,Azumi-mura,NaganoPref.,21-VI-1998,K. TAKAHASHI leg; 1(3, Mt.
72 Kazuhiro TAKAHAsH
1
3
2
Fi9s. 1-3. HabitusofPodabrus(‘A.siopodab・,us)spp. - 1,R(4.)kusan1a1sp nov., 3holotype;2,R
(A)masatoispnov.,3holotype;3,P.(A)tsuc、11ika、、,,a1spnov., holotype.
Nangetsusan,Chausudake,Nasu-machi,TochigiProf.,21-VI-1998,H.TAKlzAwAleg.;
4 ,Eko-1ine,Mt.Zao,MiyagiPref.,15-VII-1995,K.TAKAHAsHlleg.
Distribution. Japan(centralandnortheasternHonshu,mostlysubalpinezone).
Remalks. The present new species is closely related to P. (A) kadowakii
NAKANEetMAKINo,1989 from theOki IslandsandP(A) kasugensisNAKANEel
MAKIN0, l989 fromMt.Kasuga,NaraPrefecture,butcanbedistinguishedfromthe
fo「merbytheshorterdorsalprocessofthemalegenitalia,andfromthelatterbythe
me「elustrouselytra.Judgingfromthestructureofthemalegenitalia,thisnewspecjes
shouldbeincludedinthe1:)(A)kadowakiigroup.
Podabrus(Asiopodabrus)″tasatoispnov.
[Japanesename:Masato-kubibosojokai]
(Figs 2,5)
Male. Medium-sizedspecies.Bodyalmostbrownishblack;headbeforeeyes,
Figs. 4-6. MalegenitaliaofPodabrus(As1opodabrus)spp. - 4,F)(A.)kusa,na1sp nov; 5, p (A)
maSatOiSPnov;6,1;'(A)tsuchikawaispnov;a:ventralview,b:dorsalview,c:lateralview.(scales
0.5mm)
New Podab,-us fromCentralandNortheasternHonshu 73
]
a b c
4
5
a D C
-
a b c 6
74 KazuhiroTAKAHASH
antennalsegments1-2,pronota1margin,coxae,trochanters,andlateralandposterior
marginsofabdominalsegmentsyellowishbrown;innersidesofforefemora,and fore
andmidtibiaebrown.
Headscatteredwithfinepuncturesinfront,denselypunctatebehindeyes,andru-
goselysoonneck.Antennaeslender,reachingbasalthirdofelytra;comparativelength
ofeachsegmentas follows: - 2.15: 1.11: 1: 1.51: 1.61: 1.6: 1.51: 1.64: 1.58: 1.39:
178.
.
Pronotum relatively narrow, clearly narrower than head, widest at middle;
PW/HW0.82(0.76-0.85),PW/PL1.05(1.01-1.05),PW/PA t47(1.39-1.48),PW/PB
1.02(1.01-1.07);surfacecloselycoveredwithmoderatepunctures,thoughthepunc-
turesbecomelargeronbasalhalf;lateralmarginssinuate,anterioranglesalittleangu-
lateandposterioronesprominent;discwellelevatedexceptforlateralmargins,though
slightly and circularly concave inbasal half. Elytrasomewhatslender, wider than
pronotum; EW/PW 158 (1.56-1.66), EL/EW 3.50 (3.41-3.83). Front andmiddle
clawscleft,innerteethofhindonesenlarge triangularlyprojectedapicad.
Malegenitaliaelongate;ventralprocessshort,withsomewhatacuteapices;dorsal
processlongandrobust,V-shape gentlycurvedinwards,denselyprovidedwith long
hairsoninnersides(Fig5).
Length:7.0(6.9-7.8)mm;breadth:1.4(1.4-1.5)mm.
Female. Notdiscriminatedfromthoseofotherrelatedspecies.
Typeseries. Holotype: Nakagoshodani,Miyada-mura,NaganoProf.,23-VI-
,
1995,M.HINAKuRA leg.Paratypes: 2 Shirabidaira, Miyada-mura, NaganoProf.,
,
22-VI-1996,K.TAKAHAsHIleg;1(3,Akigami,Asahi-mura,GifuProf.,29-VI-1995,
1. KIRIYAMA leg; 1 ,Nigorigo, 0saka-machi,GifuPref.,27-VI-1971,1.KIRIYAMA
leg.
Distribution. Japan(centralHonshu,upperpartoftheFa,guscr・e,1atazone).
Remarks. Thepresentnewspeciesisverysimilar inexternalappearanceto
(A)hozumiiNAKANEetMAKIN0,1989fromMt.Kiso-0ntake, (4.)tactTAKAHAsHl,
1992 fromTsukui,KanagawaPrefecture,andothermedium-sizedblackishspecies,
butcanbeeasilydistinguished fromthembytherobustdorsalprocessof themale
genitalia.
Thespecific nameisgivena量er Mr. MasatoHINAKURA, who first found this
uniquespecieshavingpeculiarmalegenitalia,andkindlyentrustedmewiththestudy.
Podabrus(Asiopodabrus)tsuchikawal'sp nov.
[Japanesename:Tsuchikawa-kubibosojokai]
(Figs3,6)
Male. Relativelysmallspecies.Bodyalmostbrownishblack;headbeforeeyes,
antennalsegments1-2,pronota1margin,prosternum,coxae,trochanters, forefemora,
basal halves ofmid femora, basal fourthof hind femoraand fore tarsi yellowish
brown;antennalsegments3-11,foretarsiandmidtibiaedarkyellowishbrown.
NewP()dab,・fisfromCentralandNortheasternHonshu 75
Headscatteredwithfinepunctures in front,densely punctatebehindeyes,and
closelysoonneck.Antennaerelativelyshort,reachingbasal fourthofelytra;compara-
tive lengthofeachsegmentas follows: - 1.79: 1: 1.16: 1.l2: 1.22: 1.22: 1.19: 1.19:
1.19:1.13:1.43.
Pronotum relatively narrow, clearly narrower than hea widest at middle;
PW/HW0.88(0.8-0.88),PW/PL1.04(0.93-1.04),PW/PA t55(1.46-1.55),PW/PB
1.14(1.06-1.14);surfacecloselycoveredwithfinepunctures,thepuncturesbecoming
somewhat largeronbasalhalfandinanteriormarginalarea; lateralmarginsslightly
sinuate, anterior angles alittleangulateandposterior onesslightly prominent; disc
wellelevatedexcept for lateralmargins,thoughslightlyandcircularlyconcavewitha
vague longitudinal furrow inbasal half.Elytra relativelyshort, clearly wider than
pronotum;EW/PW14(1.4-1.44),EL/EW3.1(3.05-3.1).Front andmiddleclaws
cleft,innerteethofhindonesenlarged,triangularlyprojectedapicad.
Malegenitaliasomewhat elongate; ventral process conjoining lateral sides of
parameres,apicesnarrowlyrounded;dorsalprocessverylongandslender,broadlyU-
shaped,gentlycurvedinwards(Fig6).
Length:4.7(4.7-5.1)mm;breadth:1.0(1.0-1.1)mm.
Female. Notdiscriminatedfromthoseofotherrelatedspecies.
Type series. Holotype: Inugoeji-Mt. 0hmuro, Tanzawa Mts., Kanagawa
,
Pref., 29-VI-1997, K. TsUcHIKAwA leg. Paratypes: 1d, Yatakezawa, 0htaki-mura,
SaitamaProf.,4-VII-1978,K.SAsAKIleg;1d,Mt.Tense,TokyoMet.,15-VI-1977,
M.ToMoKUNIleg.(M.SAT0s' collection).
Distribution. Japan(centralHonshu,theFaguscrenatazone).
Remarks. Thepresent new species is very similar to t) (A) malthinoldes
KIEsENwETTER, l874, f:)(A)kadowakiiNAKANEetMAKIN0, l989fromtheOkiIslands
andothersmallblackishspecies,butcanbeeasilydistinguishedfromthembythevery
longslenderdorsalprocessofthemalegenitalia.
要 約
高橋和iii :本州中部および東北部に産する黒いクビボソジョウカイ類の3新種. - 本州
中部および東北部から, クビボソジョウカイ属Asiopodab1・its亜属に属する全体がほぼ黒色の3
新種を記載した. うちl種は既知種であるカドワキクビボソジョウカイにひじょうに近縁で
kadou,ak1igroupに属する. 残りの2極は,11ac11e,1tusgroupに属するが, いずれもきわめて特異な
交尾器をもち,明らかにこの極群の中の新しい系統を形成するものと認められる.
References
NAKANE,T., &T. MAKIN0,1989. Arevisionof thegenusPodab「uSWESTWOODinJapan (Il)- Re、
f MO,azaｽ Sangyo-Keie ,1lv.,(1):1-18.
TAKAHAsH1,K.,1998. Check-ListofCantharidaeofJapan. Kanagawa-C1/ii11o,0da、、'a''a,(l22):29-48・
wlTTMER,w.,1982. DieFamilieCantharidae(Col)aufTaiwan(I). Ent.Rev.Japan,37: ll9-140・