Elytra,Tokyo,36(2):287-289,November22,2008 SupplementaryNotesonPlatycerussueIMURA,2007 (Coleoptera, Lucanidae) Yuki IMURA Shinohara-cho1249-8, Kohoku-ku,Yokohama,222-0026Japan Abstract DetailedlocalityofPlatycerussueIMURA,2007isgiven,withabrief commentonitsdistributional range,habitat, foodandestimatedannual lifecycle. PlatycerussuewasdescribedveryrecentlybyIMURA(2007)asaremarkablenew species of the genus discovered in Japan for the first time in twenty years. The distributional rangeof thislucanidbeetleisnarrowlyrestrictedtothehighaltitudinal areaofacertainmountainrange,anditisobviousthat,ifonceexposedtoanexcessive huntingpressure,thenewspecieswillhaveaharmfuleffect. Ontheotherhand,neither relevant laws nor measures for conservation of thewildlife areenacted in that area, thoughthegreater partof thedistributional rangeof thenewspecies is locatedina quasi-national park. Detailed locality of thenew species was therefore tentatively maskedatthetimeoforiginaldescriptiontoavoiddisturbancecausedbycollectorsor dealers aimed at t」nis beetle. OnMarch24,2008, thespecieswas designatedbythe MinisterofEnvironmentasaspeciestemporarilyprotectedaccordingtoArticle5ofthe LawfortheConservationofEndangeredSpeciesofWildFaunaandFlora. Thespecies willbeprotectedprovisionally for thenext three years, and further field researches entrustedbytheMinistryofEnvironmentwillbecarriedoutinthemeantimeunderthe leadership of theJapaneseSocietyof Coleoptero1ogy. Final decision on thewayof protectingthespecieswillbemadeaftertakingtheresultofthesesearchesintoaccount. Inthispaper,IamgoingtogivedetailedcollectingdataofthetypeseriesofPsue, withabriefcommentonitsdistributionalrangeandhabitataswellassomebionomica1 notesobtained throughmyfieldworksmadefromJunetoNovember, 2007. Their detailswillbepresentedatajointmeetingoftheJapaneseSocietyofColeoptero1ogy, JapanColeoptero1ogicalSocietyandJapaneseSocietyofSystematicEntomologytobe heldinMatsuyamaon22-23November2008. PlalycerussueIMURA, 2007 PlatycerussueIMURA,2007,Elytra,Tokyo,35,p492,figs.1-3;originallydesignatedtypearea:mountainous regionofJapan. - IMuRA,2008a,SaikakuTsushin,Tokyo,(16),p51,fig5;2008b,Coleopterists' News,Tokyo,(162),pp.17,figs.1-3;2008c,Gekkan-Mushi,Tokyo, (450),p5, figs6,10. 1)etailedcollectingdatc1of thetypeseries. Holotype: ,easternshoulder of Mt. 288 Yuki IMURA Ishizuchi-san 石[ 鎚山], 1,600-1,700minaltitude,onthebordersofSaijo-shiand Kumakogen-cho inEhimePrefecture,Southwest Japan, 4-VI-2007, Y. IMURAleg. Paratypes: 7 1早,samedataasfortheholotype;7 9早早,samelocality, larvae , , collected in the field from June to July, 2007andemerged in the laboratory in September,2007. Typedepository. Aswasdesignated in theoriginaldescription, theholotypeis depositedinthecollectionoftheDepartmentofZoology,NationalMuseumofNature andScience,Tokyo.Paratypesarenowintheauthor'scollection,butapartofthemw1j1 be deposited in the following institutions after following prescribed procedure: 1) HokkaidoUniversityMuseum,Sapporo;2)DepartmentofZoology,NationalMuseum ofNatureandScience,Tokyo;3)OsakaMuseumofNaturalHistory;4)Entomological Laboratory,FacultyofAgriculture,EhimeUniversity;5) 0mogoMountainMuseum (Kumakogen-cho inEhimePrefecture); 6) GraduateSchool ofSocial andCultural Studies,KyushuUniversity;7)MuseodiStoriaNaturaledeltaUniversitadiFirenze;8) NaturalHistoryMuseum, London. Distribution. Highaltitudinalarea(from1,520mto t,820minaltitude,usually above1,600m)ontheIshizuchiMountains(theIshizuchiMountainRangeinanarrow sense and its northeastern continuation, the Hosei Mountain Range) lying in the northernpartofShikoku,SouthwestJapan. Thewesternmostlocalityhithertoknown is Tengu-dake, themain peak of Mt. Ishizuchi-san. In the southern part of the distributionalrange,thespeciesisrecordedfromMt.Tebako-yamaofIno-choinKochi Prefecturewhichmaybecomethesouthernlimit. Thenortheasternmostpointknown uptothepresent isthealpineareaofMt.Higashi-akaishi-yama. Bionomica1notes. Themainhabitatofthepresentspeciesisdeciduousbroadleaved forestsmainlycomposedofAcer,Fagus,Fra;xinus,Quercus,Lindera,Symp1ocos,Vjbur_ numandseveralkindsofazalea,etc.,lyingfromtheupper temperatetolowersubarctic zones. Inthelowermostpartofitsdistributionalrange(1,500-1,600minaltitude),the speciesoftenoccurssympatrica11ywithP.sugitai,thelatterofwhichisconsideredtobe ranged fromca. 1,000 to t,600mintheIshizuchiMountains. General habit ofP. sue isalmost thesameasinothermembersofthegenusbelongingtothegroupofp acutlco11is. Adulthasitsmainactivitypeakforreproductionfromlateinthespringto earlyinthesummer,correspondingtotheendofMaytothebeginningofJuneinthe alpinezoneoftheIshizuchiMountains. Adultmaleoccasionallycomesflyingtoyoung leavesofQuercuscrispulaorFraxinussp. Thefemalestartsovipositingtothesurfaceof foodplant (rottenbranch)usuallyfromthebeginningofJune. Their larvaepreferto feedonbrown-orsoftlyrottenpartofrathernarrowbranchlyingontheforest floor. AsisobservedinothermembersofthegenusdistributedinEastAsia,thisspeciesleaves apeculiarovipositionmarkonthesurfaceofitsfoodplant. Preimagina1development takesoneyearandafewmonthsattheshortest,orpresumablytwofullyearsandseveral monthsincertaincases. FromtheendofSeptembertothenextspring,newlyhatched adultsinhibernationare found, togetherwith thelarvae, from thewitheredwood. SupplementaryNotesonPlatycerussue 289 Inclosingthisshortarticle,IwishtoexpressmycordialthankstoMr.ShinjiYANo oftheOmogoMountainMuseumforhiskindhelpinvariousways. Thanksarealsodue toDr.Shun-lobi U直NOof theNational Museumof NatureandScience, Tokyo, for revisingthemanuscriptofthispaper. 要 約 井村有希: タカネルリクワガタに関する補足知見. - タカネルリクワガタPlatycerussueは 20年ぶりに発見された邦産同属の新種として, 2007年の秋に記載された. しかしながら,同種の 生息範囲は特定の山塊の高所に限定されている可能性がきわめて高いうえ,同地域においては野 生動物の捕獲に関する法的規制がとくに設けられておらず, 採集者の殺到による個体数の減少が 強く危惧されたため, 原記載の時点では具体的な産地名の公表を敢えて控え, 保全策の整備を待 つという方針がとられた.本種はその後,環境省から種の保存法に基づく緊急指定種に指定され ることになり, 2008年3月24日づけで公示が行われ, 法的規制下に置かれている. 今後, 最長3 年間にわたる指定期間中に, より詳細な学術調査が行われ, 本種の保全に対する最終的な方針が たてられる予定である. これを受けて本稿では, 昨年の本学会において予告したとおり, 本種の 具体的な生息地をあきらかにし, あわせて分布域や生息環境, 生態など, これまでに判明してい る知見の概要について述べた. 本種は四国西部の石鎚山系 (狭義の石鎚山塊と法星山脈) の高所 のみに分布し, これまでに確認されている水平分布の西限は石鎚山天狗岳, 南限は手箱山, 北東 限は東赤石山である. 垂直分布は標高1,500m強から1,800m強に及ぶが, 主たる生息域は1,600 m以上の地域である. また, 垂直分布の下限にあたる標高1,500~1,600m近辺では, シコクルリ クワガタP.sugitaiとの混生が確認されている. おもな生息環境は温帯林帯上部から亜寒帯林帯 下部に位置する落葉広葉樹林で, ブナ帯の上部にあるカェデ, トネリコ, ミズナラ, ツツジなど を主体とした疎林を好む. 幼虫の食餌資源は広葉樹の細い接地材で, 早は材の裏面にルリクワガ タ類特有の産卵マークをつける. 成虫は5~6月頃にミズナラやトネリコ類の新芽に飛来するこ とがあり, 卵から成虫の繁殖活動までに2ないし3年の期間を要するものと推測される. References IMuRA,Y.,2007.Aremarkablenewspeciesof thegenusPlatycerus (Coleoptera,Lucanidae)fromJapan. Elytra,Tokyo,35:491-496. - 2008a.Howtopreparetheendopha1licexamplesofmalegenitaliaofthegenusPlatycerus.Saikaku Tsushin,Tokyo,(16):45-53.(InJapanese) - 2008b.MorphologicalcharactersofPlatycerussue -forcorrect identification- Coleopterists' . News,Tokyo,(162):17-23.(InJapanese) - 2008c. An up-to-datemovementon thegenusPlatycerus (Coleoptera, Lucanidae)ofJapan. Gekkan-Mushi,Tokyo, (450):2-9. (InJapanese,withEnglishtitle)