Table Of ContentElytra,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
