New Record of Obrium semiformosanum (Coleoptera, Cerambycidae) from Northwestern Kyushu, Southwest Japan

6 Pages·1996·5.5 MB·English

by  Niisato, T

Elytla,Tokyo,24(1):141-146,May15,1996
NewRecordofObriun1, semf(orrnosanum(Coleoptera,
Cerambycidae) fromNorthwesternKyushu,
Southwest Japan
TatsuyaNnsATo
Bioindicator Co., Ltd.,Takada3-16-4,Toshima-ku,Tokyo,171Japan
and
Masatoshi TAKAKUwA
KanagawaPrefecturalMuseumo「NaturalHistory,
499,Iryuda, 0dawara,Kanagawa,250Japan
Abstract A new subspeciesof Obriumso,11ifo1・mosa11u,n is described from
Kyushu, Southwest Japan. It isdistinguished from the nominotypica1subspecies
occurringinTaiwanbytheslenderbodywithelongateelytraanddifferentconfiguration
ofmalegenitalorgan.
In Juneof 1983, Mr. Norito ABIRu collectedastrange Obriumspecies by
alighttrapsetathishouselocatedonAtagoyamaHillnearthecentreofNagasaki
City, northwestern Kyushu. It wasprovisionally recorded then by ABIRu and
IMAsAKA(1983)asanunknownspeciesrelatedto 0.JaponlcumPIc(1904,p 22).
However,itstruesystematicstatuswasnotclarifiedfortwelveyears.Recently,we
hadanopportunitytoexaminetheObriumspeciesinquestionincomparisonwith
othercongenersofthegenusoccurringintheneighbouringareasoftheJapanese
Islands.Afteracarefulexamination,ithasbecomeclearthattheunknownspecies
hascloserrelationshipto0.semiformosanumHAYAsHI(1974,pp.18-19)originally
recorded fromTaiwan. In thisshortpaper,wewill introduceit to theJapanese
faunaasanewgeographicalraceoftheTaiwanesespecies,under thenameof 0.
sem ormosam m a zruisubsp nov.
Beforegoingfurther,wewishtoexpressoursinceregratitudetoDr.Shun-Ichi
UilNo of theNational ScienceMuseum (Nat. Hist), Tokyo, for his constant
guidance, and also toMessrs. Norito ABIRUof NagasakiandShoichi IMAsAKA
ofFukuoka for their kindnessinsubmitting thevaluablespecimen used in this
study. Theabbreviationsusedhereinareas follows: HW-maximumwidth of
head includingeyes;PW-maximumwidth of pronotum; PA-apical width of
pronotum;PB-basal width of pronotum;PL-lengthofpronotum;EW- maxi-
142 TatsuyaNllsAToandMasatoshiTAKAKUwA
mumwidthofelytra:EL-lengthofelytra
0加MISem frMNIISAT0etTAKAKUwA,subsp
0rmosam m a nov.
[Japanesename:Nagasaki-ameiro-kamikiri]
(Figs.1,2a-c)
0b'1'un1sp:ABIRU&IMASAKA,1983,Koganen、ushi,Nagasaki,(42),p41,fig.10;IMAsAKAeta/.,1994.
ibid.,(56),p.16.
Different fromthenominotypica1subspeciesbythedarkercoloration,longer
body,weaklythoughdistinctlyemarginatesides ofelytrawhosepunctuation is
larger anddeeper,andalsoelongateapicalpartofmedianlobeofmalegenital
organ.
Male. Bodysmallandelongate,withwidelyseparatedeyes, andlongand
relativelythinappendages.Colourreddishbrown,shinyandslightlytranslucent,
with dark reddish brown antennae and legsexcept for yellowishbrown basal
partsof femora, palpi andelytra yellowish,eyesand inner sides of mandibles
black.
Head including eyes large though not so voluminous, almost smooth,
sparsely clothed with long pale yellow hairs, HW/PA 1.43, HW/PW 1.22;
mandiblesbroadandrathershort,brieflyhookedatapices;maxillarypalpuswith
terminalsegmentelongatedspindle-shaped,widestatmiddle;clypeus0.58times
as long as the basal width, smooth, transversely truncate at apex, with
fronto-clypea1sutureweaklyarcuatenear middleandnotsodeep; fronsstrongly
transverse,0.32timesas longasthebasalwidth, gently raised, withavestigial
medianlongitudinalgrooveextendingtovertex;vertexgentlyraised,withhardly
prominentantennaltubercles;occiputweaklyraised,providedwithafewshallow
punctures; eyesstrongly prominent laterad, widelyseparated from each other,
their interspacealittlemorethan t/3ondorsumand9/20on venter themaxi-
mumwidth of head. Antennaelongand filiform, nearly 14 times as long as
body; scape elongate and clavate, slightly longer than segment 3, widest at
apical 1/3, shiny, clothed with longpaleyellowhairs; segment 2 twice itsapical
width, thinly haired;segments3-4weakly thickened at apices, rather densely
withpaleyellowhairs; terminalsegmentweaklyarcuate.
Pronotumlongandnarrow,hardlycontractedatbothapexandbase,PL/PA
1.39,PL/PW1.19,PA/PB1.09,PB/EW0.54,PL/EL0.29;sidesalmost parallel
in front, weakly rounded andarcuatelyemarginate to roundlyprominent lateral
tubercles just before themiddle, thenweakly arcuateandsinuatetobase; base
gently emarginate; disc moderately convex though transversely impressed at
apical and basal t/3, almostevennear themiddle,scatteredwith rather large
punctures,eachofwhichisprovidedwithalong yingpaleyellowhair.Scutellum
narrowly triangular, thinlypubescent.
Elytralongandnarrow,moderatelyampleposteriad,EL/EW2.87;sideswith
Ob・ltumso,niformosanu,nfromKyushu l43
[
Fig. 1. Obrium semifoirmosatutm abirui
subsp nov.Scale1mm.
lessprominent humeri, nearly parallel in basal 3/11, weakly emarginate and
weakly divergent to apical 3/11, then arcuately rounded to apices which are
narrowlyseparately rounded;discweakly convex, closely providedwith rather
largepunctures, though smooth near bases and apices, clothed withmedium-
sizedpaleyellowhairs.
Ventralsurfacesmoothinmostpart;prosternumpartlypubescent incentre
just before coxal cavities, with presternal process invisible from above and
approximate both coxae at the mid line; mesosterna1process strongly com-
pressed and narrowly pointed apicad; abdomen distinctly narrowed to apex,
sparselyhaired,with3rdsternitetwicethelengthof the4th,7thsternitetruncate
at apex.
l44 TatsuyaNnsAToandMasatoshiTAKAKUwA
Legslongandthin,withhindfemurmoderatelycompressed,weaklyswollen
inapical l/3.
Malegenitalorgansmallandlightlysclerotized.Medianlobe l/5thelength
of elytra, arcuate in profile, slightly elongate in apical part and moderately
ampleinbasalpartindorsalview;ventralplatestronglyproducedapicad,arcuately
emarginateatsides,withroundlytruncateapex.Tegmen3/4thelengthofmedian
lobe,broad;paramerestraightlynarrowedtoapexwhichistruncateandprovided
withlongsetae.
Body length:4.1mm;width:1.0mm.
Holotype Atagoyama Hill, 125m in alt., Shiraki-cho, Nagasaki-shi,
,
Kyushu,SWJapan,25-VI-1983,N.ABIRuleg.Preservedinthecollectionofthe
DepartmentofZoology,NationalScienceMuseum(Nat.Hist),Tokyo.
Distribution. Kyushu,SouthwestJapan.
Notes. Because of the differences in both the external and aedeaga1
morphology, andalso of thewidegeographical gapbetweennorthern Kyushu
and Taiwan, thisnewsubspeciesmight be regarded as asibling species of 0.
semifo(rrnosanum.
Asinglemalespecimen examinedwascollected by a light trap set in a
residentialarealocatedatthesoutheasternpartofNagasakiCity.Thelocalityis
about ahalfway up thehill called Atagoyama,onwhich ispreservedby Atago
Shrineanevergreenbroadleaved forestpredominatedby Castanopsissieboldii.
要 約
新里達也・高桑正敏:ニセタカサゴアメイロカミキリの九州北西部からの記録. - 長崎
市郊外で1983年に採集され, すでに阿比留・今坂(1983)により種名未確定のまま記録されてい
る, ムナミゾアメイロカミキリ属の種を検した結果, 台湾から記録されているニセタカサゴア
メイロカミキリと同一種であることが判明した. なお, この個体は台湾産のものと比較すると,
体長がはるかに大きく, 上翅はより長く, その背面は大きく密に点刻され, その両側が明瞭に
えぐられるほか, 雄交尾器中央片の形態が異なる. 本論文では, この長崎産の個体にもとづい
て詳細な形態記載を行なうとともに, 台湾の基亜種とは, 地理的・形態的に区別できる集団に
属するものとみなし, ナガサキアメイロカミキリ0.semifo(rmosanumabirutsubspnov.という新
名を与えた.
References
ABIRu, N., &S. IMAsAKA,1983. ThebeetlesofsouthernNagasaki-shi (l). Koganemushi,Nlagasaki,
(42):35-45.(InJapanese)
BATES, H. W.,1873. Onthe1ongicornColeopteraofJapan. Ann. Mag. ,!at. Hist., (4),12:1-39.
GREssITT,J. L.,1951. LongicombeetlesofChina. Longicornia,2:1-667,22pls.
HAYAsHI,M.,1974. Newandunrecorded1ongicornbeetlesfromTaiwan(Coleoptera,Cerambycidae)
1. Bu11. 0sakaJonanWomen'sJr. Coll.,(9):1-36.
Obriumsemlformosanumfrom Kyushu 145
b
a
[
d
Fig. 2. MalegenitalorganofObriumsemlfo1・mosanumsubspp;a-c, 0.s abiruisubsp nov;
d-f, 0.s.semfo(mosanumHAYAsHI. - a,d,Medianlobeinlateralview;b,e,dittoin
dorsal view;c, f, tegmenindorsal view.Scale: 0.2mm.
146 TatsuyaNusAT0andMasatoshiTAKAKUWA
IMAsAKA, S., et a1., 1994. A list of the family Cerambycidae from Na9aSaki P「efeCtu「e
Koganemushi, Nagasaki,(56):1-43.(InJapanese)
NusAT0,T.,1992. SubfamilyCerambycinae. InOHBAYAsHI, N., M.SATo & K. KOJIMA(edS・)
must・l.GjadeIdentiftc.Longic.Beet1.Japan,pp.117-146,467-534.(InJapanesewithEn9liShtitle)
pfc,M.,1904. Descriptiond'unObriu,nduJaponetnotesdochasse. Mat. Longlc.,5(1):22.
Elytra,Tok:yo,24(1):146,May15,1996
ANewReplacementNameforGabrzusmultlpunctatusSHIBATA
(Coleoptera,Staphylinidae)
YasutoshiSHIBATA
Tsurukawa3-8-13,MachidaCity,Tokyo,195Japan
Dr.HaraldScHILLHAMMERkindlyinformedmethatthenameGabrius'miltipunctatus
SHIBATA,1991, ispreoccupiedbyGabrlusmultipunctat11s(BLATCHLEY,1910). BLATCHLEY
describedhismultipunctatusinPh1ionthus,whichisnowinGabriusandisajuniorsynonym
of G. ovaliceps (FALL). I am greatly indebted to Dr. Harald ScHILLHAMMER of the
Naturhistorisches MuseumWien for his kindness.
GabriusschillhammeriSHIBATA, nom nov.
GabriusmultlpunctatusSHIBATA,1991,Elytra,Tokyo,19:88.
NecPhi1onthusmldtipunctatusBLATcHLEY,1910,Illustrdescript.Cat.Coleopt.Indiana,Indianapolis,
pp 387,389.
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BLATcHLEY,W.S.,1910. AnIllustratedDescriptiveCatalogueoftheColeopteraorBeetles(exclusive
ofRhynchophora)KnowntoOccurinIndiana.1386pp.TheNaturePublishingCo.,Indianapolis.
SMETANA, A.,1995. Rovebeetles of the subtribe Phi1onthinaof AmericanorthofMexico(Co-
1eoptera:Staphylinidae).Classification,phylogenyandtaxonomic revision. Me,n. Etlt., Int.,
3:1-946.AssociatedPublishers,Florida.
SHIBATA,Y.,1991. ThreenewGab・i1us(Coleoptera,Staphylinidae)fromJapan. Elyt1'a,Tokyo,19:
85-92.