ebook img

Additional Records of Clytine Species (Coleoptera, Cerambycidae) from the Ogasawara Islands (3). Revised Notes on the Chlorophorus Species from Muko-jima Island PDF

2007·11.4 MB·English
by  NiisatoT
Save to my drive
Quick download
Download
Most books are stored in the elastic cloud where traffic is expensive. For this reason, we have a limit on daily download.

Preview Additional Records of Clytine Species (Coleoptera, Cerambycidae) from the Ogasawara Islands (3). Revised Notes on the Chlorophorus Species from Muko-jima Island

Elytra,Tokyo,35(1):205-215,May30,2007 Additional RecordsofClytineSpecies(Coleoptera,Cerambycidae) fromtheOgasawara Islands(3) RevisedNotesontheCh1orophorusSpeciesfromMuko-jimaIsland1) TatsuyaNnsAT0 BioindicatorCo., Ltd.,Yarai-cho126,Shinjuku,Tokyo,162-0805Japan and Haruki KARUBE KanagawaPrefecturalMuseumofNatural History, 499Iryuda,0dawara, Kanagawa,250-0031Japan Abstract TwoC111orophorusspeciesfromMuko-jimaIslandof theOgasawara Islands are revised. Chto・,optic,・us masatakat and C ktlsama1 are illustrated and redescribedbasedon theholotypeandadditionalspecimens. IntroductoryReview Ch1orophorus kusamai wasdescribedon thebasisof themaleholotypespecimen collectedfromMuko-jimaIslandof theOgasawaraIslandsonMay22,1974,andwas suggestedintheoriginaldescription(SAT0,1999)asarelativeofC kobayashiiKOMIYA fromtheChichi-jimaandHaha-jimagroupsof thesameislands.Several yearsafter SAT0's description, NIIsATo and KARUBE (2000, 2002), additionally recorded C kusamai on the basis of a series of specimens collectedby recent field survey of Muko-jimaIsland,andredescribedandillustrateditshabitusandmalegenitalorganin comparisonwithC kobayashii. TheyalsorecordedCbonlnensisKANOfromthesame islandandsuggestedthepeculiaritiesin thepalebrownpubescentbodywith reduced blackmaculationon thepronotumandelytra. Misarrangement wasclearedby reexaminationof themalegenital organof C kusamai. Duringthestudyof theCh1or〔)phorusspeciesfromtheOgasawaraIslands, KARUBEfoundout thedifferenceinmalegenitalorganbetween“C kusama1”athand andtheillustrationinSAT0'soriginal description; theparameresweredrawnasslender 1)ThisstudyissupportedbyaGlobalEnvironmentalFund(F-051) 206 TatsuyaNIIsAToandHaruki KARUBE andshallowlydehiscentonesinSAT0'stext-figure,whilein“C kusamai' athandthey showabroad,robustanddeeplydehsicentformrelatedtothoseofC kobayashii,aswas 「ope「tedinourpreviouspaper (NIIsAT0& KARUBE, 2000, p 440, fig 9). SAT0's illustration seems to show acloser relationship to thoseof C boninensls. It is most probablethatC kusamatisnotaspeciesrelatedtoC kobayashiiaswassuggestedinthe originaldescription. ThequestionwaseasilysolvedbyexaminationoftheholotypeofC kusama1.As wasexpected,thetrueC kusamainodoubtbelongstothesamelineageasC bonlnensls andisregardedasasiblingspeciesonMuko-jimaIsland. 0ntheother hand,our“C kusama1”athandwasanundescribedspeciestruelyalliedtoC kobayashii,andrecently described under thenameofC masatakai (NllsATo& KARUBE,2006). TherealtionanddistributionoftheseOgasawaraspeciesbelongingtothegroupof Cyayeyamenslsaresummarizedagainasfollows: SubgroupofC boninensls CbonlnenslsKANO:Chichi-jimaIs.?,0toto-jimaIs.,Ani-jimaIs.,Nishi-jimaIs. andMinami-jimaIs. (Chichi-jimagroup),Haha-jimaIs.,Mukou-jimaIs.,Ane- jimaIs andMei-jimaIs. (Haha-jimagroup). C kusamai M.SAT0:Muko-jimaIs. (Muko-jimagroup). SubgroupofC obayashz1' C kobayashii KoMIYA: 0toto-jimaIs.,Ani-jimaIs.,Higashi-jimaIs.,Chichi- jima Is. (Chichi-jima group), Haha-jima Is., Mukou-jima Is., Ane-jima Is., Imoto-jimaIs andMei-jimaIs. (Haha-jimagroup). CmasatakaiNIIsAToetKARUBE:Muko-jimaIs andNakodo-jimaIs. (Muko- jimagroup). In the followinglines, wearegoing torevise twoCh1orophorusspecies from the Muko-jimagroupof theOgasawaraIslandsbasedupontheabovereexamination. Thepresentpaper isdedicatedtothelateDr.MasatakaSAT0whounexpectedly passedawayinthesummerof2006.Hewasinterestedinthecoleopteranfaunaofthe Ogasawara Islands, particularly fromthezoogeographical viewpoint, andalsogave manyusefulsuggestionsforourcollaborativestudies.WedescribedCmasatakai from Muko-jimaIslandasthelastdedicationtohisentomological life(Elytra,Tokyo,34,p. 222). Ch1orophoruskMsamai M. SAT0,1999 [Japanesename:Mukojima-tora-kamikiri] (Figs.l,5) Ch1orophoruskltsama1M.SAT0,1999,Elytra,Tokyo,27,p47,figs.1-3;typelocality:Muko-jima,0gasawara Islands. Ch1orophorusbonlnenssi:NIlsATo&KARUBE,2000,Elytra,Tokyo,28,p 441, fig8. Bodylength(measuredfromapicalmarginofclypeustoelytra1apices)9.0-9.5mm Ch1orophorusfromMuko-jimaIsland 207 Figs.1-4. Chtorophoruskusatnai M.SAT0,C masatakai NnsAToet KARUBE and their relatives, holotypes. - 1, C kusamai from Muko-jima Is; 2, C boninensis KANOfrom“0gasawara- jima”;3,CmasatakaifromMuko-jimaIs;4,CkobayashiiKoMIYAfromHaha-jimaIs. 208 TatsuyaNIIsAToandHaruki KARUBE in 9.6mm in早. , Medium-sizedspeciesdirectlyrelatedtoCboninerisls,wellconvex,blackinmostof integument,providedwithordinaryblackmaculationonpronotumandelytrathough ratherstrongly reduced. Body denselyclothedwith light greenishgray pubescence. Pronotum andelytraclothedwith light yellowishbrownpubescence, providedwith reducedblackpubescentmaculationasfollows: - pronotum:1) apairofsmallspotsat sidesof themiddle,2)somewhat transversespotatcentrejustbehindmiddle,deeply angulateat themiddleofposteriormargin;elytra:3)smallhumeralspot,4) L-shaped bandatalevelbetweenbasaltenthandthird,almostattainingatbasetothehumeral spot,5) twotransversebandsatmiddleandonapical fourth,barelyreachingboththe marginsornot reachingtheexternalmargininthemiddle. Head small in contrast with well expanded pronotum, 0.70 times as wide as pronotum,closelypunctured;fronsslightlylongerthanwide,gentlyraisedtowardsthe midlinewhichformsafinegrooveintheposterior2/5;eye-lobein frontal viewalittle deeper thangenaand2/3thewidthoffrons.Antennaerelativelyshort,attainingtothe middle in er thebasalthirdin早ofelytra.Pronotumrelativelylarge,1.25timesas wideasmaximumwidthatmiddle,weaklyarcuateatsides,slightlycontractedtoapex, withdiscstrongly convex, highest at basal 2/5, closely coarsely rugoseon surface. Scutellumlarge,roundedtriangular.Elytrashortandbroad,alittlelessthan2.0times as longasthehumeralwidth,slightly wider thanpronotum;sideswith completely roundedhumeri,stronglynarrowedinslightlyarcuatelinetoapices,whichareoblique, with blunt short dentsat externalangles; discwell convex, weakly rugosethanon pronotum. Venter of thoraces weakly rugose. Abdomen coarsely shagreened; anal ventritegentlyarcuateandslightlyemarginateatmiddlein ,simplygentlyarcuatein 早;analtergitegentlyraisedandtransverselytruncateatapicalmarginin ,moderately raisedtowardsmidlineanddeclivousandweaklyemarginateatapicalmarginin早.Legs stoutandrathershort,withhindfemoranot reachingelytra1apicesevenin . MalegenitalorganoftypicalconformationinthegroupofC yayeyamensisand similartothatofCbonlnensls. Medianlobealittlelessthan2/5thelengthofelytra, ratherweaklyarcuateandstronglydepressedinprofile,withapical lobenearly1/2the wholelengthofmedianlobe,moredistinctlynarrowedapicadthanthatofC bonlnensis, andshortlypointedat theextremity.Parameremoderatelynarrowedatexternalsides andbluntlypointedapicad,withstrongventralridgesat3/8,providedwithdenseshort setaenear apices; 8th tergiteslightlyemarginateat apex;8th sternitewidelydeeply emarginateatapicalmargin. Specimensexamined. [Muko-jimagroup] 1 (holotype),“0gasawara / Muko- jima /22May,1974 /M. IGAleg”“Holotype/Ch1orophoruskusama1M.SAT0,sp nov./ Det.M.SAT0,1999(redlabel).”;2 ,Muko-jimaIs.,27-VI-2000,H. KARUBE leg; 1 ,sameastheprecedingbut 22-VI-2003; 2exs.,sameastheprecedingbuf f2- VI-2003. Com◆paratlvespecimensexammedof C boninensis. l早(holotype), “0gasawara- jima / legSAWADA(writtenbyKANO)”“Ch1orophorusboninenslsKANO(pink label C111orophorusfromMuko-jimaIsland 209 writtenby KANO)” “NSMT-I-C/17278” “HoLoTYPE/Ch1orophorusbonlnensis KANO, l933 (red label writtenby Y. KUROSAWA).” Thetruelocalityoftheholotypeismost a , probably Haha-jimaIsland. [Chichi-jimagroup] 1 ・ 0toto-jim Is. ,20-VI-2000 H KARUBE leg; l Shikano-hama, 0toto-jima Is., 25-VI-2005, H. KARUBEleg; l , , Shikano-hama - Hirone, 0toto-jimaIs.,12-VI-2006,H.KARUBE leg;1早& 2exs., Nishi-jimaIs.,25-VI-2003,H.KARUBEleg; lf,Uguisu-hama-ue,Ani-jimaIs.,27-VI- 1998,M. TAKAKUwAleg;1ex.,southernarea,Ani-jimaIs.,25-VI-2001,H.KARUBE leg;1ex.,Mansakuhama - Daichi,Ani-jimaIs.,4-X-2003, H. KARuBEleg; l 1早, , Minami-jimaIs.,22-V-2002, K. HoRIKosHI leg;5 ,1早,sameislandasthepreced- ing,1-X-2004,H.KARUBEleg. [Haha-jimagroup] I Mt.Kuwanoki, Haha-jimaIs., , 24-VI-1976, M. TAKAKUwA leg;2 Hasu-ike, Haha-jimaIs., 23-IX-1989;1ex., , Shizuka-zawa,Haha-jimaIs., 14-VI-2003,S.SuDAleg;2exs.,24-VI-2000,Mukai- jimaIs.,H.KARUBEleg; lex.,Mukai-jimaIs.,10-VI-2001,S.0MURAleg;2exs.,12- VI-2003, H. KARUBE leg; 2exs., Mei-jima Is., 13-VI-2003, H. KARUBE leg; l , Ane-jimaIs., 19-VI-1999, H. KARUBEleg. Distribution. OgasawaraIsis:Muko-jimaIs. (Muko-jimagroup). Notes. It isdoubtlessthatC kusamat isaspecieshavingcloser relationship toC. bonlnensis from theChichi-jimaandHaha-jimagroups. Twoallopatricspeciesshare suchuniquemalegenitalorganasthenarrowandbrieflydehiscentparameres. Ch1oro- phoruskusamai isnotsomuchspecializedinthemalegenitalorganfromCbonlnensis andonlydistinguished fromthelatterbythemoredistinctlynarrowedapical lobeof median lobeandparamere,moredistinct emarginationat apicesof 8th tergiteand sternite. From the pale brown pubescence, C kusamai iseasilyseparable fromC bonlnensis,thoughsuchcoloredpubescencemaybeanancestralstateandremindsusof C yayeyamensisKANOof thesamelineagemainly fromtheRyukyu Islands. In the rather specializedspecies, C boninensls, thecolour of pubescencebecomesgradually reddishtowardsnorthtosouthintheOgasawaraIslands. Thisspeciesseems toberaresincewewereabletocollectonly fiveadditional specimens in spite of our repeated visits to Muko-jima Island during 1999-2006. Ch1orophorusogasawarensisisalsogenerallyrareinthehabitat,onlyexceptingMinami- jima Islandof theChichi-jimagroup whereC. ogasawarerisis isoneofthedominant cerambycidspecies. Itmayhavebeencausedfromnon-existenceofcompetitionwith sympatricclytinebelongingtothesubgroupofC kobayashii,sinceanyspeciesof the subgroupdoesnot occur inMinami-jimaIsland. ChtorophorusmasatakaiNIIsAToet KARUBE, 2006 [Japanesename:Mukojima-kiiro-tora-kamikiri] (Figs3,7) Ch1orophorusmasataka1NIIsAT0etKARUBE,2006 Elytra,Tokyo,34,p 222; typelocality:Muko-jima Is Ogasawara Isis. C1/1orophorus k11sa'na1: NIISAT0 & KARUBE,2000 Ibid.,28,p 440, figs 4-5,10;2002, ibid.,30.p.254; 210 TatsuyaNIIsAToandHarukiKARUBE KARuBE,eta1.,2004,Res.Rept.Kanagawapref.Musnat.Hist.,(12),p 78 Body length (measured fromapicalmarginofclypeustoelytra1apices) 8.4-10.6 mm in , 9.2-l2.0mm in早. Similar indorsalmaculationtotheprecedingspeciesbutdoubtlessbelongstothe same lineage as C kobayashii. Medium-sized,moderately convex, black inmost of integument.Bodydenselyclothedwithlightgreenishgraypubescence. Pronotumand elytraclothedwithlightgreenishyellowpubescence,thoughslightlydarkeronprono- tum,providedwithreducedblackpubescentmaculationasfollows: - pronotum:1) a pair ofsmallspotsatsidesjustbeforemiddle,2) pair ofspotsatcentrejust behind middle, becoming larger and approximateor small and fairly apart according to individuals; elytra: 3) smallhumeralspot, 4) J-shapedbandat a level between basal 1/20and3/10,fairlyapart at basefromthehumeralspot,sometimesdividedintotwo isolatedspots, 5) two incomplete transverse bandsat middleand on apical fourth, almostalwaysreachingboththemargins. Headmoderate includingwell prominent eyes,more than 0.75 timesaswideas pronotum,weaklyrugose;frons12timesaswideaslong,weaklyraisedtowardsmidline whichformsaweakcostainposterior2/5;eye-lobeinfrontalviewnearlyequalindepth togenaand3/4 thewidthof frons. Antennae fineandrather long, attaining toapical thirdind''orjustbehindmiddlein早ofelytra.Pronotummoderate,slightlylonger than themaximumwidthatmiddle,gentlyarcuateatsides,moderatelycontractedtoapex, with disc rather distinctly convex, highest at basal 3/8, closely coarsely rugoseon surface.Scutellumlarge,roundedtriangular.Elytramoderateinlength,about2.3times as long as the humeral width, 1.25 timesas wideas pronotum; sides with humeri somewhatroundlyexpanded,subparalleltomiddlethenslightlyarcuatetoapices,which areoblique,withshortbluntdentsatexternalangles;discmoderatelyconvex,weakly rugose.Venterofthoracesweaklyrugose.Abdomencoarselyshagreened;analventrite impressedalongmidline inapical half andslightly arcuateatmargin ind'', almost transverselytruncatein早;analtergiteweaklyraisedandtransverselytruncatewithvery shallowemarginationatmiddleofapicalmarginind'l,slightlyraisedanddeclivousand weaklyemarginateat apical margin in早. Legsratherslender andlong, withhind femoraslightlyexceedingelytra1apicesin . Malegenitalorganbasicallysimilar tothat ofC kobayashii.Medianlobealittle morethan7/20thelengthofelytra,hardlyarcuateinprofile,withshorterapical lobe whichis4/9thewholelengthofmedianlobe,gentlynarrowedapicad,bluntlyrounded at apexofdorsalplate.Parameres large,constrictednearbasal fifth, thenmarkedly broadenedbeforeapices, narrowlybut deeplydehiscent inapical 5/6, provided with Figs 5-6. Malegenital organof Ch1orophorus kusamai M. SAT0 fromMuko-jima Is. (5)andC. boninensisiKANOfromHaha-jimaIs. (6). - a,Medianlobeinlateralaspect;b,dittoindorsal aspect; c, tegmen in lateral aspect; d, ditto indorsalaspect;e,8thabdominal tergiteindorsal aspect; f,8thabdominalsterniteinventralaspect.Scale1mm. 211 ch1ofophorusfromMuko-jimaIsland 212 TatsuyaNIIsAToandHarukiKARUBE ventralridgesatbasal2/5;8thtergitetransverselytruncateatapex;8thsternitealmost bl-lobed, deeply concaveatmiddleof apicalmargin. Specimense:x;amined. 25 8(l fromMuko-jimaIsand1早fromNakodo-jima , Is., 0gasawaraIsis. (thetypeseriesincludingtheholotype,andthecollectingdatain r,, detailareshowninNIIsAT0& KARUBE(2006,p 222); l 1一一F nea Oyama Muko , jimaIs.,18-VI-2006,H.KARuBEleg; lf,1早,almostofthesamedataasthepreceding butsouthernareaofMuko-jimaIs. Comparativespecimense:x;amined of C kobayashii. [Chichi-jimagroup] 1ex., Kuro-hama - Ichino-tani, 0toto-jimaIs.,29-VI-1998,M.TAKAKUwA&H. KARUBE leg;4 ,northernarea, 0toto-jimaIs.,19-VI-1999, H.KARUBEleg;13exs.,almost samedataastheprecedingbut20-VI-1999;3 ,3早早,0toto-jimaIs.,20-VI-1999,H. KARuBE leg; 1早, almost samedataas theprecedingbut 20-VI-2000; lf, 2早早, Kuro-hama - Ichino-tani,0toto-jimaIs.,16-VI-2003,H.KARUBEleg;l Shikano- , hama - Hirone,0toto-jimaIs.,17-VI-2003,H.KARUBEleg;2 ,1早,samelocality andcollectorbut20-VI-2003;2 ,1早,Mansaku - Daichi,Ani-jimaIs.,15-VI-2001, H.KARUBEleg;2 Mansaku-hama,Ani-jimaIs.,25-VI-2001, H. KARUBEleg; 2 , d'ld1',southernarea,Ani-jimaIs.,25-VI-2001,M. TAKAKUwAleg;1 , Mansaku - Daichi, Ani-jima Is., 4-V-2003,H. KARuBEleg; 3 ,1早,samelocality,4-X-2003, H. KARUBEleg. [Haha-jimagroup] I (holotype),“Holotype(orangelabel)”“Haha- jimaIs. /Nagahama - Kitamura/13~15-X-1973/ T.KOBAYASHIleg”“Ch1oropho- ruskobayashiiKoMIYA,1976/Holotype(redlabel) (allwrittenbyZ.KoMIYA);2(l?, Hasu-ike,Haha-jimaIs.,23-IX-1989;1早,Shizuka-zawa,Haha-jimaIs.,14-VI-2003,S. SUDAleg;2早早,Mukou-jimaIs.,24-VI-2000,H.KARuBEleg;1早,sameislandasthe preceding, 10-VI-2001, M. TAKAKuwA leg; l 2早早,sameislandasthepreceding, , 12-VI-2003,H.KARuBEleg;1早,sameislandasthepreceding,emergedfromhoston V~VII-2005,H. KARUBEleg;1早,Ane-jimaIs.,15-VI-2003,H. KARUBEleg; lf, Imoto-jimaIs.,22-VI-2006,H.KARUBEleg;3 ,sameisland,emergedout fromhost inVI-2006,H.KARUBEleg; l 29 Mei-jimaIs., l3-VI-2003,H. KARUBEleg. , , Distribution. Ogasawara Isis: Muko-jima Is and Nakodo-jima Is. (Muko-jima group). Notes. ThisspecieswaserroneouslyrecordedasC kusamai:duetoamisidentifi- cation based on the original description (NIIsATo & KARUBE, 2000, 2002). We thoughtlesslybelievedin thecomparativecomment of thedescriptionandconcluded that C kusamai is aspecies related toC kobayashii. Recently, weexamined the holotypeofC kusamaipreservedintheEntomological Laboratory,EhimeUniversity, andrealized that it belongstothelineageofC bonlnensis. Therefore,theCh1orophorus speciesinquestionwasdescribedasanewspeciesofthelineageofC kobayashii inour Figs 7-8. MalegenitalorganofCh1orop11or1lsmasatakai NllsAToet KARuBE fromMuko-jima Is. (7)andC kobayashii KoMIYAfromHaha-jimaIs. (8). - a,Medianlobeinlateralaspect;b, ditto in dorsalaspect;c, tegmen inlateralaspect; d,dittoin dorsalaspect;e,8thabdominal tergiteindorsalaspect; f,8thabdominalsterniteinventralaspect.Scale1mm. Chlo「oPhorusfromMuko-jimaIsland 213 7b _ 214 TatsuyaNIIsAT0andHarukiKARUBE recentpaper(NIISAT0& KARUBE,2006). Though sharing many respects, the twosibling species, C masatakai and C kobayashii KoMIYA, areeasilydistinguished fromeachotherbynot onlytheblack maculationontheelytrabutalsotheirspecializedmalegenitalorgans.Theapicalpart ofthemedianlobeinCmasataka1iscompletelyroundedandexposingtheextremityof theventralplate, insteadofsimplynarrowedoneinC kobayashii. It isalsoevident in theconformationoftheparamerewhichismarkedlyelongateandbroadenedtoapical 2/5inC masatakai, though rather weaklysoinC kobayashii. Lightgreenishbrown pubescenceand reducedblackpubescentmaculationinCmasatakaiareeasilyrecog- nizablecharactersdiscriminating it fromC kobayashi1. Such apubescent pattern is almost perfectly identical in twosympatric Ch1orophorus on Muko-jima Island, C masatakai andC kusamai,andseemstohavebeencausedbyconvergenceinthesmall habitatoftheislandgroup. Ch1orophorusmasatakai is themost dominantspecies inall the threeclytines recorded fromMuko-jimaIsland,becauseof rather alongseriesofspecimenslisted abovewereobtainedbyourprevioussurveysafterthe2000's.Adultclytinesareusually foundontheblossomsofTerminaliacatappa,andalsoknownfromCiriumboninenseby acollectingrecord.Planchoneuaobovataisoneof themainhostplantsof theclytine, sincethefemaleusuallylayseggsonthebarksurfaceandtheadultsemergedout from dead trunks. Xy1otrechusogasawarensis KANO alsousesP. obovata ashost plant on Muko-jima Island. Acknowledgements Wewishtoexpressour heartythankstothelateDr.MasatakaSAT0ofNagoya, Drs.NobuoOHBAYAsHIof theEntomologicalLaboratory,EhimeUniversity,Matsu- yama, andMasatoshi TAKAKUwAof theKanagawaPrefectural Museumof Natural History, 0dawara,ShuheiNoMuRA of the National Science Museum (Nat. Hist ), Tokyo, for their usufu1suggestionand/or helpinexamining thevaluablespecimens includingthetypes,andalsotoDr. KoichiMATSUMOTO,ShinichiSUDA, for their kind cooperation in the field. Special thanksarealso due to Dr. Shun-Ichi UtNo for his constanceguidanceandcritical reviewoftheoriginalmanuscriptofthispaper. 要 約 新里達也・ 部治紀: 小笠原諸島におけるトラカミキリの記録(3). 聲島列島のクロトラカミ キリ属に関する追加知見と訂正. - 小笠原諸島,lヒ部の 島列島に分布するクロトラカミキリ属 C111orophorusの2種, ムコジマトラカミキリC kilsamaiM.SAT0とムコジマキイロトラカミキリ CmasatakaiNIlsAToet KARuBEに関する知見の追加と訂正を, その研究の経緯も併せて報告し た. ムコジマキイロトラはNIIsAT0&KARuBE(2000,2002)などによってムコジマトラの誤同定 のもとに再記録されていたが, 同著者によって最近になってオガサワラキイロトラカミキリに近

See more

The list of books you might like

Most books are stored in the elastic cloud where traffic is expensive. For this reason, we have a limit on daily download.