Obrium brevicorne (Coleoptera, Cerambycidae) discovered in Central Honshu, Japan

2007·0.66 MB·

by  Niisato, Tatsuya

Elytra,Tokyo,35(1):344,May30,2007
ObrzumbrevzcorKe (Coleoptera,Cerambycidae)
Discovered inCentral Honshu,Japan
TatsuyaNnsATo1)andToruHoRIGUcHI2)
1) BioindicatorCo.,Ltd.,Yarai-cho126,Shinjuku,Tokyo,162-0805Japan
2) Ishihara1197-4,Shibukawa-shi,GunmaPref.,377-0007Japan
ObriumbrevicornePLAv1LsTsHIKov, 1940, wasoriginally described from Ussuri, and is
presentlyknowntooccurinFarEastRussia,theKoreanPeninsulaandHokkaido. InJapan, this
obriinespecieswasfirstlyillustratedbyKUsAMAandTAKAKUwA(1984)intheiriconographica1
bookasanundeterminedObriumspeciesonthebasisof thespecimenscollected fromeastern
Hokkaido. Afterthat,NIlsATo(1991)gaveitstruename0.brevicornefortheObriuminquestion.
Inthesummerof2006, HoRIGucHlcollectedapeculiarObriumspecimenbylight inthe
drainageof theJinryu-gawaRiverofUeno-muraVillageofGunmaPrefecture. He had no
interestinthatObriumaftercollecting,andbelievedthatitwasalargespecimenofthecommon
Obrium, 0.obscuripennetakakuwa1. Becauesofsuchcircumstances, theObriumspeciesin
questionwasbroughttoN1lsAToforidentificationmorethanfourmonthsafterHORIGUCHI's
discovery. Surprisingly,hisObriumspecimeninquestionwasexactly0. brevicornewhichhad
never been found from Honshu.
In earlyDecemberof thesameyear,werevisitedUeno-muraVillagetogether withour
friendsinentomologyforcollectingadditionalspecimens. Itseemstobeeasyforcollectingthe
larvae of 0. brevicorne since manyadultsemergedout from the host branches of Fraxinus
mandshuricavar.JaponicainHokkaido. Weexaminedthehostplantalongthevalleyofthe
Jinryu-gawaRiverinafullearlywinterday. However,oureffortwasnotrepaid. Wefoundno
larvaeofanyObrium,neither inthebranchesnor thetreeofF mandshurlca which wasalso
expectedasthemainhost of 0. brevicorneinHonshu.
ThecollectingrecordofHoRGIUcHl'sspecimenisasfollows:1早,Narahara,Ueno-mura
Viii.,GunmaPref.,Honshu,Japan,26-VII-2006,T.HoRIGucH11eg.Specimencameflyingon
thescreenof light trapatabout21:00. Itwasaverywarmnightandtheairtemperaturewas
more than20°C.
In closingthisshort report,wewish to thank Messrs. J. KANEKo, M. MURATAandM
TAKEDAfortheirkindsupport inthefieldworks.
References
KUsAMA,K.,&M.TAKAKUwA,1984.Cerambycinae.Jpn.Soc.Coleoptero1.(ed),TheLo11gicorn-Beetlesof
JapanMColor,pp 249-351,pls 26-48.
NIIsATo,T.,1991.TrueidentityofaJapanesespeciesof thegenusObr1'urn (Coleoptera,Cerambycidae).
Elytra, Tokyo,19:158.
- 2007.Cerambycinae.InOHBAYAsHl,N.,&T.NIIsATo(eds),LongicornBeetlesofJapa't,pp 252-
281,424-512.TokaiUniv.Press,Hadano.
PLAv1LsTsHIKov, N.N.,1940.Cerambycinae.FlaunaSSSR, InsectsFaunaColeopteres,22:I-XIV十1-784.