A new Kunbir (Coleoptera, Cerambycidae) from the Island of Bali, Indonesia

2008·4 MB·

by  Yokoi, Yaheita

Elytra,Tokyo,36(2):267-273,November22,2008
A NewKunbir (Coleoptera,Cerambycidae) from
the IslandofBail, Indonesia
YaheitaYoKoI
Beerenkothen33,40882Ratingen,Germany
and
TatsuyaNnsATo
BioindicatorCo.,Ltd., Yarai-cho126,Shinjuku,Tokyo,162-0805Japan
Abstract A new speciesof thecerambycidgenusKunbir LAMEEREisde-
scribedasthefirstrepresentativeofthegenusfromBail IslandofIndonesia. Ithas
some resemblance to K atriapicatis GREssITT et RoNDoN from Laos,butcan be
distinguishedbythedifferentcolour,elytra1punctation,structureofantenna,relative
lengthof hind femur,and themalegenitalorgan.
Morethan20speciesofthegenusKunbirLAMEEREhavebeenrecordedsofar from
theOrientalRegion. Untilrecently,thedistributionofKunbirspecieswasconsideredto
be confined to its northwestern half, basically the continental part includingSouth
China, Indochina, IndianSubcontinent, andsuch peripheral islands as Taiwan and
Ceylon. From the extensive region further south, stretching eastwards from the
Malayan Peninsula to theSunda Islands, the regioncalled“Malayana” by PASCOE,
therewasnorecordofKunbirspecies. ItwasassumedthatthegenusKunbir isabsent
inMalayanaandthereforeitsdistributionismuchmorerestrictedgeographicallythan
thesistergenusMerionoeda,whichexistsnotonlyinthewholeOrientalRegionbutalso
intheAustralianRegion. WiththedescriptionofK.1ombokianaNIIsAToet YoKoI
(2008), wehaveshown that thegenusdoesoccurinMalayanaandrathersurprisingly
in Lombok Island,east ofWallace'stinein theAustralianRegion.
In the following lines, wewill describeKunbir ikuo1sp nov from Bail Island of
IndonesiaasasecondrepresentativeofthegenusinMalayana,andatthesametimethe
first one fromwest ofWallace'stine. OftheknownKunblrspecies, it ismostclosely
similar to K atriclpicalisGREssITTetRoNDoNfromLaos.
Wewouldliketothank Mr.TheodoreL.CHILDERs forhiscritical readingof the
draft of thispaper. Theabbreviationsusedin theratiosof measurement arealready
explained inourpreviouspapers(YoKoI &NIIsATo,2007,2008).
268 YaheitaYoKoIandTatsuyaNllsATo
Kunbir ikuoiSD
nov
(Figs. l-5)
Bodylength (fromapicalmarginofclypeustoelytra1apices)6.1mm.
Male. Colouryellowishred,partlyblackorbrownishblack,stronglyshinyin
general; headyellowishred, black ineyes, black thoughslightly reddish inantenna
except forreddishpalebrownappendicleofterminalsegment;elytrabrownexcept for
yellowishrednearhumeri;scutellumyellowishred;venterofthoracesincludingcoxae
and trochanters largely reddish yellow though more or less infuscate at middle of
metasternum;abdomenblack; forelegsyellowishredexcept fordarkbrowntarsusand
apicalhalfoftibia,midandhindlegsreddishdarkbrownexceptforpaleyellowishbasal
half of femur.
Headmoderatelyprojectedforwards,moderatelyconvex,narrower thanthemaxi-
mumwidthofpronotum,HW/PW0.90,providedwithcoarsepunctures inirregular
rowsandshort erect paleyellow hairs; fronssubtrapezoida1, l/3thelengthofbasal
width,stronglydeclivoustowardsthemediangroove,scatteredwithcoarsepunctures
andprovidedwithminuteerecthairs, FA/FB0.88;clypeuslarge,halfthelengthof
basalwidth,stronglynarrowed toapex,weaklyraisedatmiddle,coarsely punctured
throughoutandwithsparsepaleyellowhairsonapicalhalf;genaenarrow,3/7thedepth
oflowereye-lobes;eyesmedium-sizedandweaklyprominent,separatedfromeachother
byhalfthewidthofocciput,widelyandverydeeplyemarginate. Antennaefairlylong,
almost reachingelytralapices,clothedwithminutesilverypubescence,additionallywith
longflyingreddishyellowhairsalongbasalfivesegments;scapefairlylong,stout and
arcuate,stronglythickenednearapex,segment3thickenednearapex,segment4alittle
lessso, 3/4 the lengthofscapeanddistinctly longer thansegment 3, apical seven
segmentsmoreor less flattened,segments 5-7obtuselyserrateexternally, terminal
segmentbluntlytoothedatapex.
Pronotumslightlyshorterthanthemaximumwidthatmiddle,slightlyconvergent
toapex,PL/PW0.93,PA/PW0.73,PB/PW0.78,arcuateinbasal3/4withtwopairs
ofsmall lateralswellings, oneatmiddleand theother obtuseonecloselybehind the
anteriorpair;discwhollymoderatelyconvexthoughtransversallyimpressedbeforeand
behindlargemediancallosity,withadeeptransversalgroovebeforebase,thecallosity
interrupted for thebasal half byapairof longitudinal groovesnear middle, bothof
whicharelinkedtothetransversalgroove,shagreenedexcept for thecallositywhichis
providedwithafewpaleyellowhairs. Scutellumroundedtriangular,almostglabrous,
providedwithsomeminutepuncturesat apexandsides.
Elytralongandmoderatelywide,EL/EW2.89, withsides gentlyprominent at
humeri,moderatelynarrowedinbasal4/7,thenarcuatetoapiceswhicharemoderately
rounded; discevenly attened, withcoarseirregularpuncturesthroughout, thepunc-
turesbeingmostlylarger thantheirinterspacesthoughsmallernearhumeri,apicesand
sides,sparsely clothedwithshort paleyellowhairs.
Venter of thoraces shiny, very sparsely punctured; prosternum with distinctly
New Kunbir from Bail. Indonesia 269
Fig.1. Kunbirikuoisp nov.,holotype, fromBail Island of Indonesia
,
compressedinter-coxalprocess;mesosternumshagreenednearmiddle,withinter-coxal
processbroadandarcuatelyemarginateatsides;metasternumbarelypuncturedand
sparselyclothedwithshorterectpaleyellowhairs. Abdomenweaklyarcuateatsides,
sparselypuncturedandhaired,withbasalventriteabout1/3thelengthofabdomenand
ventrite 2 approximately 1/5, anal ventrite almost transversely truncate at middle
insteadofweaklyconcavein that ofK atriapicalis.
Legsslenderandmoderatelylong,clothedwitherectpaleyellowhairs;hindfemur
just reachingelytra1apex, distinctlyclavateinapicalhalf,which isstronglyswollenat
internalsideandweaklysoatexternal;hindtibia4/5thelengthoffemur,gentlyclavate
andobtuselyasperate.
Male genital organ medium-sized and rather lightly sclerotized. Median lobe
ordinaryspindle-shaped, weakly convexinprofile, withsidesslightlyarcuateinbasal
halves, gently roundedat apicalhalfthenstraightlynarrowed toapexof ventralplate
which isbroadly truncate; dorsal plateattainingapical fourthof apical lobe; median
strutsalittlelessthanahalf ofmedianlobe;copulatorypiecesasin Figs 2-3. Tegmen
slender, withparamereof l/6thelengthoftegmen,bilobedinapical2/9andstrongly
tuberculateatsidesjust behindapex,providedwith3-4relativelyshortsetae. Tergite
270 YaheitaYoKoIandTatsuyaNIIsATo
.、、一゛す一/・一/一一一・ :-、--、、一 一・-'--',・・・
//,・
2 3 6
・1ー 、、
- - l、、_ '/1・
5
7 0.5mm
Figs.2-7. MalegenitalorganofKunbirikuoisp nov fromBailIslandofIndonesia(2-5)andofK.
atriapicalisGREssITTetRoNDoNfromcentralThailand(6&7). - 2,Median lobeinlateral
view;3 &6,medianlobeindorsalview (excludingendopha11uswithcopulatorypiecesinFig 6);
4&7, tegmenindorsalview;5,8thabdominalsegmentindorsalview.
New Kunbir from Bail. Indonesia 271
8almostcircular,dehiscentinapicalthird,witheachlobebroadlyroundedandclothed
with longhairsatapicalmargin.
Typespecimen. Holotype, GunungPrada,Jembrana,WesternBail, Indonesia,
,
8-XII-2005, Y. YoKoI leg. Theholotypeispreserved in theNational Museum of
NatureandScience, Tokyo.
Distribution. Bail,Indonesia.
Etymology. Thespecificnameofthisnewspeciesisdedicatedtothememoryofthe
lateMr.IkuoYoKoIwhoisayoungerbrotherof thefirstauthorandpassedawayon
23rdAugust2008inspiteofbeingstillyoung. Hewasdeeplyinterestedinnatureand
insects in his life time.
Notes. Of theknownKunbirspecies, K atriapicalisGREssITTetRONDON from
LaosbearsthegreatestresemblancetoK. ikuoisp nov. However,thenewspeciesdiffers
inthefollowingcharacteristics:1)Meso-andmetathoracesarereddishyellow,whereas
theyarebrown todarkbrown in K atriapicalis; 2) antennalsegment 4isdistinctly
longerthansegment3,whereastheyareofthesamelengthinK atriapicalis;3)elytra1
punctationiscoarserandirregular,stretchingalmost totheapices,whereaspunctureis
absentnearelytra1apicesinK atriapicalis;4)hindfemurbarelyreachestheelytra1apex,
whereasthatofK atri11picalisdistinctlysurpassestheelytra1apexby l/3tot/2ofthe
swollenpartofhindfemur;5)medianlobeisgentlyarcuateatsidesofbasalhalfand
broadlytruncateatapex,whiledistinctlyemarginateatsidesbehindmiddleandroundly
producedatapexinK atri11picalis;paramereisstronglytuberculateatsidesjustbehind
apex. Kunbirfo(rtico11isHoLzscHUHfromThailandalsohascertainresemblancetothe
newspecies,though it hasshorter antennae.
It is interesting tonotethat Kunbir lkuo1sp nov. is found in Bail Island in the
immediateneighborhoodof Lombok IslandwhereK.1ombokiana has recentlybeen
recorded. ThusK. ikuoisp nov.istheeasternmost representativeof thegenusinthe
OrientalRegion,whileK.1ombokianaistheonlyandwesternmost representativeinthe
AustralianRegion,thoughthetwospeciesonlymoderatelyresembleeachother. Inany
event, both thespeciesoccur far from thehithertoknowndistributional rangeofthe
genusKunblr in theimmediateneighborhoodofeachotheracrosstheLombokStraits,
bridgingWallace'stine.
A questionarisesastowhetherK. ikuoisp and K. 1ombokiana are isolated
nov
insularspeciesorthegenusKunbirisactuallymorewidelyandcontinuouslydistributed
intheOrientalandAustralianRegionsthanpreviouslyassumed,asinthecaseofthe
sister genus Merionoeda. Toanswer the question, weneed toexploit andstudy the
Kunbir faunaoftheregionmoreextensively.
TheholotypemalewascollectedbyY.YoKoInearavirgin forest inwesternBail,
500-600m in altitude. Thecollection at a light wasprobablyaccidental, as Kunbir
speciesaregenerallynotattracted tolight.
272 YaheitaYoKoIandTatsuyaNIIsATo
Corrections
Inrecentpapers,wemadetwoerrorsinwritingtheabbreviationandthedescrip-
tion as follows.
1) IntheJapaneseJournalofSystematicEntomology,13,p.187,line3fromthe
bottom:insert“FA-apicalwidthoffrons”before“FB- basalwidthof frons”.
2) IntheElytra,36,p 4,line2fromthebottom: for“wider thanthemaximum
width”, read“shorter thanthemaximumwidth”.
要 約
横井彌平太・新里達也:インドネシア・パリ島から発見されたKunbir属の1新種. - Kun-
bir属は,東洋区北西の大陸部である南中国からインドシナ, インド亜大陸とその近隣地域にかけ
て20種以上の分布が知られていたが, これより南東のマレ一半島およびインドネシア諸島を含
む広大な島嶼地域からの記録はなかった. ところが最近になって, インドネシアのロンボック島
からK.1ombokianaNIIsAToetYoKoIが発見され, 従来知られていた分布域から遠く離れたオー
ストリア区西端にも本属の種の分布することが明らかになった. 本論文ではさらに, ロンボック
島の西隣に位置するパリ島から最近になって発見された本属の1新種に対して, Kunbirikuoisp
nov.と命名記載した. パリとロンボックの隣接する両島は, 狭隘なロンボック海峡によって分離
され, この海峡が東洋区とォーストラリァ区を分かつウァラス線の一部を構成していることはよ
く知られている. 今回の一連の発見により, 本属の既知分布域から遠く隔てられたインドネシア
諸島に, ウァラス線をまたいで2種が分布することが明らかになった.
Kunbirikuo1spnov.は, ラオスから記載されたKatriapicalisGREssITTetRoNDoNにもっとも
近縁と考えられるが, 色彩や触角, 後腿節と体の相対的位置, 上翅の点刻, 雄交尾器などの特徴
から明らかに区別することができる. 隣接するロンボック島から記載されたK.1ombokianaはむ
しろK telephoroidesLAMEEREに近く, 本種とそれほど近縁な種ではない. Kunbirikuoisp nov.
とK.1ombokianaの2種がインドネシア諸島に孤立して分布するものであるか, あるいはKunbir
属自体も近縁のMer1onoeda属と同様に, 東洋区からォーストラリァ区までほぼ連続して広く分
布するものであるかは, 今後, この島嶼地域をより詳しく調査することによって明らかにされる
ことだろう.
なおikuo,という新名は, 共同執筆者横井の実弟であって, 本論文執筆中に死去した横井郁夫
に献名されたものである.
References
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Elytra,Tokyo,36(2):273-274,November22,2008
NewLocalityandHost Recordsof Trirachysb11obulartus
(Coleoptera,Cerambycidae)
HiroshiMAKIHARA1),TakeshiToMA1)andPhamQuangTHU2)
1)ForestryandForestProductsResearchInstitute,Matsunosato1,
Tsukuba, Ibaraki,305-8687Japan
2)ForestScienceInstituteofVietnam,Chem,TuLiem,Hanoi,Vietnam
Keywords: Cerambycidae,Trirahysbi1obulartus,Rhizophoraapiculata, Viet-
nam.
Trira〔:hysbi1obulartuswasdescribedbyGREssITTandRoNDoN(1970)fromPakkading(alt.
156m), Borikhane Province, Khongxedong (alt. 122m), Wapikhamthong Province and
SalacemsIslandalongthedrainagesoftheMekongRiverinLaos,andhasneverbeenrecorded
again. WehaverecentlyfoundthisspeciesinamangroveforestinVietnam,andreportithere
asanewlocality. Wealsorecorditshostplantfor thefirsttime.
Trirachysbi1obulartusGREssITTetRoNDoN,1970
(Figs.1-3)
Triralhysbi1obulartusGREsslTTetRoNDoN,1970,Pacif. Ins.Mon.,24:68, fig.13f.
Specimense:xlamlned. 1♀,MangroveforestinCanGio,HeChiMing,collectedfromaliving
RhizophoraaplculataBL treeinVI-2007, P.Q.THUleg; l♀,samelocality,threespeciesand
collector,emergedinXI-2007;1(1?,samedataastheprecedingbutemergedinIII-2008.