Re-evaluation of the Status of Pelopides mniszechi (Coleoptera, Passalidae), with a Redescription Based on the Holotype

2004·2.9 MB·

by  Kon, M

E/、・tl-a、To(k、o,32(1):119-l23,May31,2004
Re-evaluationoftheStatusofPe/opzdesmmszec฀ (Coleoptera
Passalidae),withaRedescriptionBasedontheHolotype
Masahiro KoN
GraduateSchoolofEnvironmentalScience,TheUniversityofShigaPrefecture,
Hassaka-cho2500,Hikone.Shiga,522-8533Japan
and
Kunio ARAYA
GraduateSchoolo「SocialandCulturalStudies,KyushuUniversity,
Ropponmatsu4-2-l,Chuo-ku,Fukuoka,810-8560Japan
Abstract Taxonon、icstatusof thepassalidbeetle, Pet〔)pides117nls.ccitt(KAup),
Whichwasregardedasajuniorsynonymof tilde,Is (WIEDF_MANN), isreassessed. Il is
concludedthat1)nlnls::ccittisavalidspeciesbecause
,nnlsiech1isspecificallydistinct
trom 「''1de'Isintheshapeoftarsus.Pe/op1t/es111,11stccitt isredescribedbased onthe
holotype.
KAuP(1868) described E1・1ocnemlsmniszechi fromNias,Sumatra. Afterwards,
HELLER(1900)gavethereplacementnameGnapha1ocnemlstothepassalidgenusE1・10-
c'1emlsKAuP, 1868,becausethegenericnameEriocnemlshadbeenpreoccupiedby
the hummingbird genus E1'leone'nls REIcHENBAcH, 1853. Subsequently, GRAVELY
(1914)regardedthetaxonmnlszechiasajuniorsynonymofGnapha1ocnenust1・idens
(WIEDEMANN,1823) fromJava.Furthermore, inhisrevisional workon thePassalidae
of theworld,GRAVELY (1918) regarded thegenus Gnapha1ocnemlsasajunior syn-
onymofthegenusPe1opldesKUwERT,1896.
When wehadanopportunity toexamine theholotypeofEriocnemlsmnlszechi
preservedinthecollectionoftheHessischerLandesmuseum,Darmstadt,wefoundit
specifically distinct fromJavanesespecimensofPe1opidestrldens insomeexternal
characters.Thus,weregardthetaxonmnlszechiasavalidspeciesofthegenusPe1op1-
des.Weherewith redescribePe1oplses1nnlszechi basedon theholotype for external
morphology. Inaddition,wealsodescribethemalegenitaliaofRmnlszech1basedona
specimenfromWestSumatrainthefirstauthors' collection.
Inthefollowingdescription,weadopttheterminologyofGRAVELY(1914) forex-
ternalmorphologyandofLINDRoTH(l957) formalegenitalia.ExplanatorySEMpho-
tographsarealsoprovided forPe1opldesmniszech1andPtrldensbasedonspecimens
120 MasahiroKoNandKunioARAYA
inthefirstauthor'scollection
Pelopidesmnlszechi(KAup)
(Figs.1-4)
E,・loo,Ie,nts111n1s. ech1KAuP,1868,Coleopt.He量e,3,p 22.
G'lap/1a1ocne'ntst1'ide'Is(WIEDEMANN):GRAVELY,1914,Mem.Ind.Mus.,3,p 250(inpart).
Pe1optdest1'!dens(WIEDF_MANN):GRAVELY,1918,Mem.Ind.Mus.,7,p95(inpart).
Redescrlption(]ftheholotype. Sexunknown.Bodylength fromanteriormargin
ofheadtoapicesofelytra41.0mm.
Outertuberclestransverselytruncatedandweaklybifidatdistalend;leftoutertu-
berclenarrowerandsmaller thantherightone;outerdistalangleofleftouter tubercle
locatedatmuchlower level than theinnerone;uppersurfaceof leftouter tubercle
stronglyhollowedinouterportion;rightoutertuberclewithadistinctsecondarytuber-
clebehindouterdistalangle;outerangleofrightoutertuberclemoreprominent for-
wardsandlocatedataslightlylower level thantheinnerone; innertubercleslarge,
pointedupwardsandforwards;frontalareadepressed,rugose;ridgebetweeninnertu-
berclesdistinct;centraltubercledistinctthoughsmall,obtuselyangledinlateralview;
Fig. 1. HabitusofPe1opidesn1川s二ec1/i(KAUl'),holotype,scatolemm
RedescriptionofPe1opides,nnlszec/1i l21
Figs. 2-3. MalegenitaliaofPe1oplalesmnlsec11i(KAup),nottype;2,ventralview;3,rightlateralview,
scale2mm.
Figs. 4-5. FifthtarsomereofhindlegofPe1opldesspp;4,1),n,1is・echl (KAup),nottype;5,Pt1・idens
(WIEDEMANN),nottype,scale1mm.
122 MasahiroKoNandKunioARAY^
Parietal ridgerounded;supraoccipital ridgedistinctandconnectedwithsupraorbital
ridgeindistalportion,vanishedincentralportion;depressedareawrinkled;canthus
roundedatanteriorangle;eyelarge,extendingbeyonddistalendofcanthus.Anterior
lowertoothofleftmandible1ocatedclosetolowestterminaltooth,smallerthanthelat_
ter;uppertoothofleftmandibledistinct,obtuse-angled;uppermarginofleftmandible
weaklyconvexbehindupper tooth; outerbasalangleofleftmandiblelocatednear
base, strongly produced outwards and a little forwards; latero-ventra1side of Ie量
mandiblestronglyhollowednearbase;anterior lowertoothofrightmandibleabsent;
lowestterminal toothofrightmandiblemuchlarger thanthele量one;upper toothof
rightmandiblepointedforwards;uppermarginofrightmandibleconvexbehindupper
tooth;outerbasalangleofrightmandibledistinctthoughsmall.Labrumwithsetifer-
ouspunctures;anteriormarginconcave,withadistinctdenticleatthemiddle;anterior
anglesrounde theleftonemoreprominent forwardsthantherightone.Antennawith
6short lamellae.Prementumdepressedand rough in centralportion, withmedian
ridge inanterior portion,strongly swollen inpostero-latera1portion. Mentum with
setiferouspuncturesinlateralportion,impunctateandhairlessincentralportion;scar
obliquely oval; anterior marginalmoststraight incentral portion; posteriormargin
straight.Hypostoma1processimpunctate,hairless,smooth;innermarginslightlycon-
vex;outermarginwithobtuseangleinanteriorportion.
Pronotum with distinct median sulcus, rough in lateral scar and in marginal
groove.Posteriorplateofprosternumimpunctateandhairless.Mesosternumimpunc-
tateandhairless,withshallowscar;mesothoracicepisternumhairyinposteriorcorner.
Lateralandanterior intermediateareasofmetasternumdenselypuncturedandhairy;
posterior intermediateareaimpunctateandhairless,withirregulardentsalongposte-
riormarginofcentralarea; ridgeseparating intermediateand lateral areasdistinct;
centralareaimpunctateandhairless.
Firsttothirdgroovesofelytronsimplyandfinelypunctured; fourthsimplypunc-
turedinanteriorportion,ladder-likeinposteriorportionclosetoposteriorend;、f量i hto
eighthladder-likealongwholelength;sixthandseventhwider thanfifthandeighth;
ninthfinelypuncturedalongwholelength;sixthtoeighthinterstriaeofelytronthinner
thantheadjacentgroovesinposteriorportion.Fifthtarsomerebroadeneddistally,pro-
jectinglikehoodatdorso-dista1endinalllegs.
Second visibleabdominal sternitepuncturedandhairy along transverse ridge;
thirdtosixthimpunctateandhairless.
esc''lpf1on mafegenlfa/fa asecf on a spec加lent;-om esf S″t flat,-a. Penis
large,longerthanthesumofparameresandbasalpieceinventralview,withlongitudi-
nalmembranousareaalong themiddlelineonventralside;parameresunitedonven-
tralside,withanteriormarginconcaveinventralview,lateralmarginsalmostparallel
inventralview;basalpiecetransverse,shorterthanparameresinventralview,withan-
teriormarginconcavein ventral view,withlateral marginweaklyconvex in ventral
view.
Specimensexamined. Pe1opidesmnlsech1(KAUp): holotype, Nias,Sumatra(in
RedescriptionofPc/of'1(/os111111s二ccitt l23
thecollectionofHessischerLandesmuseum,Darmstadt);1 ,19,Mt.Singglang,West
Sumatra,3-VIII-1994,K.FUJITAleg.
Pe1opidestridens(WIEDEMANN):1?,Banyuwangi,E.Java,11-VIII-l986,T.ITO
leg;1!,Sukanegara,Java,1,100-1,300m,10~12-VII-2002,K.FUJITAleg.
fSf「iOtifZOf?. Sumat「a.
1st Motes. Pefopldes177Mszecﾍ i distinc fro f,-lde1?s in the followingcharac-
ters:inPmnlszechi,thefifthtarsomeresareprojectinglikeahoodatthedorso-dista1
endinall thelegs,whereasin1:) tridens,theyaregentlyrounded(Figs 4&5);inthe
former,theeighthgrooveoftheelytronisladder-likealongwholelengthwhereas,in
thelatter,itissimplypuncturedinanteriorportion.
Acknowledgments
WewishtoexpressourheartythankstoDr.WSCHNEIDER, theHessischerLan-
desmuseum,DarmstadtandProf.M.MATsu1,KyotoUniversity, forgivingustheop-
portunitytomakethepresentstudy.WearealsoindebtedtoMessrsT.ITOandK.FU-
JITA for providingus invaluablespecimens. Thisstudy wassupportedinpart by a
Grant-in-Aid fromtheJapanSociety forthePromotionofScience(No.14405013).
要 約
近 雅専l ・荒谷邦雄: クロツヤムシの一種Pe1opldesm,,,s. ec/,iの分類学的再評価と再記
載. - Pe/opldesf,・foie,Is(WIEDEMANN)の新参異名とみなされていた ,m1s・ccitt(KAup)の再評
価をおこなった. その結果, Inn,.sechi(KAup)は付節の形態がPtridensとは明確に異なること
から, これを有効な種であるとみなし, ホロタイプにもとづき再記載した.
References
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