Stephanopachys sachalinensis (MATSUMURA) (Coleoptera, Bostrychidae) Found Infesting Coniferous Bark in Kanagawa Prefecture, Japan

3 Pages·2000·2.8 MB·English

by  Iwata, R

Elyt''a,Totkyo,28(2):387-389,November15,2000
StePhanOpachyssachalinensis(MATsUMURA)(Coleoptera,
BOStrychidae)FoundInfestingConiferousBarkjn
KanagawaPrefecture,Japan
Ryutar0IWATA
FO「estZoologyLaboratory,DepartmentofForestScienceandResources,
Colte9eofBioresourceSceinces,NihonUniversity,
Fujisawa,252-8510Japan,
Klaus-Ulrich GEls
Schauinslandstr22,D79100,Freiburg,Germany
and
Yukihiko HIRANo
585-29Renshoji,0dawara,250-0865Japan
Abstract Stephanopachyssachalinensls (MATsUMURA) (Coleoptera,Bostrychi-
dae),aspecieshavingbeendescribedfromSakhalinandneverrecordedelsewhere,was
foundinfestingconiferousbarkforgardeninguseinKamakura,CentralJapan.Thispopu-
lationisdeemedtohavebeenimportedfromEastRussiaor itssurroundings.Asupple-
mentarynotewasgiventodistinguishitfromacloselyrelatedspecies,S.substrlatus.
Stephan〔)pachyssachalinenslsisabostrychidspeciesdescribedbyMATsUMuRA
(1912) fromSolowiyofka,Sakhalin,underthenameRhyzoperthasachalinensls,and
CHUJ0(1936)transferredittothepresentgenus.Itisaspecieshithertounknown from
Japan,andlittleisknownwithregardtoitsbiology.
Several yearsago, through thecourtesyof thelateDr.S.MORIYAandDr.M.
TAKAKuwA,wehadanopportunitytoexamineseveralspecimensofastrangeminute
beetlespecjesthathadbeenfoundbyagardenerinKamakura,KanagawaPrefectu「e,
centralJapan.Thebeetlesweresaidtohaveemergedoutofconiferouscute「ba「k
fragmentmaterial forgardeninguse.Twoofus,Y.HandR.1.,recognizedthemasa
specjesofabostrychidgenusStepha1opachys,andlater,oneofus,K.-U.G.,byCOm-
parjng themwjthother relatedspecies (Squadrico11is,S.substriatuSandS・hZ-
malayanus),cametoaconclusionthattheyareS.sachatinenSis.
388 Rvutar0IWAT-、,etat
Stepha,topachyssachalineltsis(MATSUMURA)
[Japanesename:Karafuto-hirata-nagashinkui]
Specimens examined. 5exs., Kamakura-shi, Kanagawa Prof., Japan, 30-111-
1994,collectorunknown(bodylength3.7-4.2mm;Fig.1).
Here,weaddafewspecificcharacteristicsassupplementtoitsoriginaldescrip-
tionbyMATsUMURA(1912),statingthebroadpenultimatesegmentoftheantennalclub
and theelytra1proportions,which distinguishes thespecies froma closely related
species,S.substriatus. Moreprecisely, inS. .s・achalinensistheantenna、lasastouter
shape,thebasalsegmentsstouterandslightlywider thaninS.subst1・latus. Inparticu-
lar,inS.sachalinenslsthesecondandthirdbasalantennalsegmentsareshort,thethird
onlyslightlylongerthanthefourth,whilein‘S.substriatusthesecondandthirdbasal
segmentsarelongerandmoreslender,thethirdclearlylongerthantheshortandglo-
bosefourth. InS.sac11alinensls,theelytra1pairareabout2.5timesaslongaswide,as
opposedtoabout2.0times inS.substriatus.Also,inS.sachalinenslsthegranulaof
theapicaldeclivityofelytraarelessprominentthaninS.substriatus.
Discussion
AsforStephanopa〔lhysoftheFarEast,KRlvoLUTsKAIA(1992)mentionedonlyS.
1inearis and S. substriatus as members of the Far Eastern districts of Russia, and
Fi9・1. S/ep/1a'101りac7/1,.fsac/ta/,,1ensls',
(MATSUMURA).
Stpita'1opac1/、's.l'achali11enst?,IntroducedtoJapan? 389
ZHANGeta1.(1995)recordedS. linearisfromDaxinganling,NortheastChina,asthe
SoleChineserepresentativeofthegenus.Therefore,sinceitsdescription,S.sachalj_
nenslshasbeenfurtherrecordedneitherfromSakhalinnorfromitsailacentregions.
SpeciesofthegenusStephanopachys,unliketheotherbostrychidgenera,are
knowntoinfestinnerandouterbarkofnorthernconifers,andareintroducedtoother
Countriesratherreadily(FSIHER,1950;ScHURR-M1cHEL,1950;GEIs,inpress).Thepres_
ent infestation isconsistentwiththese facts.Althoughthereisnoinformationasto
WhetherthispopulationisoftheJapaneseoriginornot,theconiferousbarkmaterial,
f「omwhichthebeetlesemerge mightbeanimportedproduct fromEastRussiaorits
Surroundings,andinthiscase,thesebeetlesshouldberegardedasnotnativebutintro_
ducedtoJapan.
Acknowledgments
WethankDr.M.TAKAKuwA,Yokohama, forhisprovidinguswiththerelevant
specimens.Also,wededicatethisarticletothememoryofthelateDr.S. MoRIYA,a
pestcontrolscientistatYokohama.
要 約
岩田隆太郎・Klaus-UlrichGEIS・平野幸彦:針葉樹樹皮を食害していたstephanopachyssacha_
1inensis(MATsuMuRA)カラフトヒラタナガシンクイ (新称) の神奈川県における発見. - 樺
太から記載されて以来どこからも記録のなかったカラフトヒラタナガシンクイ (新称)
Stepha,1opachyssachaline,Isis(MATsuMuRA) (ナガシンクイムシ科) が, 神奈川県鎌倉市において,
園芸用資材の針葉樹樹皮破片に発生しているのが発見され, ロシア東部またはその周辺からの
人為導入と考えられた. 近縁種S.substriatusとの区別点を若干補足した.
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