Table Of ContentElyt''a、7olkyo,33(1):143-147.May30,2005
ANewSubspeciesofMecydaflsshz onz(Coleoptera,Cerambycidae)
fromHainan,SouthwestChina
TatsuyaNIIsAT0
BioindicatorCo.,Ltd.,Yarai-cho126,Shinjuku,Tokyo,162_0805Japan
and
MasamichiYAGI
Namiki-cho4-12,IbarakiCity,Osaka,567-0892Japan
Abstract A new subspeciesofNee、,(/allssill,1bo1・t1isdescribed from Hainan of
SouthwestChinaunder thenameof/lama,Ianov.It isclearlydistinguished from the
nominotypical racefromnorthernVietnambytheshortenedbody,theroundedsuturalan-
glesofelytra1apices, thetruncateapicalmarginof the8thtergiteandthethinnerapical
partofmedianlobe.
ThenecydalinefaunaofHainanofSouthChinaisstillextremelypoorsinceonly
aspecies commonwithnorthernVietnam, N.st1・nadiHoLzscHUH,hasso far been
known. Inthesummerof2004,apeculiarNevdalisspeciescollectedfromthatisland
werebrought forthtoourhands.Aswasexpectedinviewofthefaunalsimilarity,gen-
eral appearanceof Necydalisspecies inquestion almost agreed with N. shinborii
TAKAKUwAetN1lsATowhichisalsoknown fromnorthernVietnam. Inthispaper,we
willdescribeandnameitashainanasubsp nov because ofseveral differences ofex-
ternalandgenitalicstructurescontrastedwiththenominotypica1raceofnorthernViet-
nam.
WewouldliketoexpressourheartythankstoDr.Shun-lobiUENooftheNational
ScienceMuseum (Nat. Hist), Tokyo, for his continuousguidance, andalso to Mr.
HarukiKARUBEoftheKanagawaPrefectL1ra1MuseumofNaturalHistory,0dawara,for
offeringthespecimenforcomparisonforourexamination,andMr.ShigeoTsuYuKIof
ZushiCityforhisarrangement forourcooperativestudy.
Necydalis(Necydalis)shinborii/1ainanasubsp nov.
(Figs.1,2,3d,4d,5(i,6d&7d)
Length (fromapicalmarginofclypeustoabdominal apex) 21.0-25.5mm,
22.5mm;width(acrosshumeriofelytra) 2.2-32mm, 32mm.
. .
TalsuyaNllsAToandMasamichiYAG
l44
l 2
Figs. 1-2. Necydaliss/1inbo,・11hainanasubsp nov.,fromHainan,S.China. - 1,Holotype ;2,allo-
type
Similarincolorationandothergeneralappearancetothenominotypica1racefrom
northernVietnambutdiscriminatedbythefollowingpoints: l)Body fairlyshortand
broadonanaverage 2) Headslightly morevoluminous, with developed tempera,
whichareusuallycompletelysurroundedwith theposterior margins ofupper eye-
lobes 3)Antennafairlyshort,barelyreachingthebaseoftergite4in crapical third
of tergite3in . 4)Pronotumsimplyandslightly arcuateatsidesnear middle, not
Figs. 3-7. Neydalisshinborilanditssiblingspecies,male. - 3,Head,pronotumandelytra, left
halfindorsalview;4,lastventrite,ventralview;5,8thtergite,lateralanddorsalviews;6,medianlobe,lat-
eralanddorsalviews;7,tegmen,lateralanddorsalviews;a,N.shinbo1-iishinbo''11TAKAKUwAetNllsATo
fromMt.TamDao(typelocality),N.Vietnam;b,dittofromMt.PhanSiPan,N.Vietnam;c, ditto from
Mt.PiaOac,N.Vietnam;d,Nshinbo,・iihainanasubsp nov from Hainan,S.China;e,1N motltlpanlls
NIIsAT0etN. 0HBAYASHIfromMt.Pan.NE.Laos.Scale:1.0mm.
NewSubspeciesofNecydlatisshinborili 145
1 - l
146 TatsuyaNllsAToandMasamichiYAGI
Fig. 8. DistributionofNecydalisshinboriianditssiblingspecies. - 0pencircles,N shinborii shin-
bo,-iiTAKAKUwAetNllsATo;blackcircle,N.shinbo'・11hainanasubsp nov;blacktriangle,N mon-
tlpanusNIISAT0etN.0HBAYASHI.
weaklyproducedasinthenominotypicalrace.5)Elytratransverselytruncateatapices,
withroundedsuturalangles 6) Lastventritemoredeeplyandsomewhat angulately
emarginateatmargin7)Eighthtergiteinapical2/5semicircularandtruncateatapical
margin 8) Medianlobestronglyarcuateinprofile,withapical partofventralplate
hardlythickenedinprofileandnarrowlypointedindorsum9)Paramerenarrowlybut
arcuatelydehiscent frombase,notstraightlysoasinthenominotypica1race.
Typeseries. Holotype ,allotype and2 paratypes:Mt.Jianfenling,San-
YaCity,HainanProv.,S.China,2~13-VII-2004.Thehole-andallotypesarepre-
servedintheNationalScienceMuseum(Nat.Hist),Tokyo,andtheparatypesarein
theprivatecollectionofYAGI.
Distrzbution. Hainan,S.China.
Notes. ThepreviouslyknownlocalitiesofN.shinboriiarethreegeographically
isolatedareasinnorthernVietnam.Mt.TamDao,thetypelocality islocatedtothe
northwestofHanoiandneartheeasternsideoftheHongRiver(RedRiver).Theother
twolocalities,Mt.PhanSiPanonthenorthernHoangLienSonRangeandMt.pja
Oac,anisolatedmountainofCaoBangProvince,arelocatednearthenorthernborder
ofVietnam,theformer lyingtothewestoftheHongRiver,andthelatteralongthe
basinoftheKeyClungRiver.Thepresentnewlocality,HainanIsland,isalsoisolated
NewSubspeciesofNecvdalisshlnbo,-lt 147
f「omthethreelocalitiesofnorthernVietnam,located490kmtothesoutheastjnabee_
lineofMt.TamDao,thetypelocalityofN.shinborii.
No〔:y(;fallsshmboriihalnanasubsp nov. isclearlydifferent inmany respectsas
desc「ibedabovefromthenominotypica1subspeciesfromnorthernvietnamandmay
possiblybeconsideredasanindependentspecies.However,weprefertoregardjtasa
9eO9raphiCa1raceoftheVietnamesespecies,sincewehavebeenunabletoexamjne
adequateseriesofspecimensofNshinboriiwiththeexceptionofthosefromMt Tam
Dao. It Si tobehopedthat thegeographicalvariationofN.shlnboriianditsrelated
Specieswillbeclarifiedbyfurtherfieldsurveysinsuchareasasnorthernvietnamand
GuangxiofSouthChina.
要 約
新里達也・八木正道:シンボリホソコバネカミキリ海南島亜種の記載. _ 中国海南島のホ
ソコバネカミキリ類は,これまで,北ベトナムと共通のトンキンホソコバネカミキリNecydalis
strnadiHoLzscHuHただ1種が知られるだけであったが, 2004年の夏に, これとは別の不明種が
採集された. この海南島の標本を詳細に検討した結果, 北ベトナムにやや広く分布するシンボ
リホソコバネカミキリN.shinbot・iiTAKAKuwAetN1lsAToに基本的な形態的特徴が一致するもの
の, いくつか重要な相違点が見いだされたので, この集団に対して,N.shinbo,・ii/,alnanasubsp
nov.という新名を与えて記載した. シンボリホソコバネカミキリは, 基準産地である北ベトナ
ムのTamDaoを除くと, 比較検討に必要な標本が現状では満足に得られてぃなぃ. 本種の地域
集団および姉妹種とみなされるラオスのNmontlpanusNllsAToetN.0HBAYAsHlも含めて, 分布空
白地帯の今後の調査により, 近い将来にその地域変異の様相が明らかにされることが期待され
る.
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