A New Species of the Genus Xanthoderopygus (Coleoptera, Anthribidae) from the Kii Peninsula, Central Japan

5 Pages·2002·4.8 MB·English

by  Senoh, T

Elvt,・a,Tokyo,30(2):358-362,November22,2002
ANewSpeciesoftheGenusXa,nthoderopygus(Coleoptera,
Anthribidae) fromtheKiiPeninsula,CentralJapan
ToshioSENOH
DepartmentofBiology,ChuoUniversityHighSchool,
Koganei,Tokyo,l84-8575Japan
and
ISa0 MATOBA
WakayamaPrefecturalMuseumofNaturalHistory,
Kainan,Wakayama,642-0001Japan
Abstract A new speciesof theanthribidgenusXanthode1,opygusisdescribed
fromtheKiiPeninsula,CentralJapanunderthenameofX kasaha,・al. Itismainlycharac-
terizedbyverylongpygidiumwithamedianlongitudinalkeel.
ThegenusXanthoderopygusSENoHbelongstothesubfamilyChoraginae.Mem-
bersof thisgenusarepredominantlydistributed in theOrientalRegion,andalsoto
easternAsia,NewGuinea,andSamoaIslands.
Inthesummerof1979,apeculiarspeciesofthisgenuswasfoundbythejunior
author, 1. MAToBA on Mt. Gomadan, Wakayama Prefecture, Central Japan. This
speciesischaracterizedbyverylongpygidiumwithamedianlongitudinalkeel,deeply
constrictedabdomen,andthehanging5thsternitewithamedianlongitudinal keel.It
wassubmittedtoT.SENoH foridentification.Sinceitprovedtobenewtoscienceafter
acarefulexamination,itwillbedescribedinthepresentpaper.
WewouldliketodedicatethisshortpapertothememoryofthelateMr.Sumac
KAsAHARA,whoonceeditedthejournal inJapanese,Cole〔)pterists' News,currently
publishedbytheJapaneseSocietyofColeoptero1ogy.
Beforegoingfurther,wewishtoexpressoursinceregratitudetoEmeritusProfes-
sor K.MoRIMoToofKyushuUniversity forhisconstantguidanceandencouragement,
andtoDr.S.-I. UENooftheNationalScienceMuseum (Nat. Hist),Tokyo, forkindly
readingtheoriginalmanuscriptofthepresentpaper.
GenusXanthoderopygusSENoH,1984
[Japanesename:Kagibara-higenagazoumushiZoku]
Xatlt/1ode1・opygusSENoH,1984,Trans.Shikokuent.Soc.,Matsuyama,16,p 31.Typespecies: De''opygtls
NewXant1/ode,opvg1lsfromtheKiiPeninsula 359
fia、,1coliisMoRIMoTo,1978,byoriginaldesignation.
Del・oplgusSHARP, l891,Transent.Soc.Lend.,1891,p 326 [pa・tt1,n].Typespecies: De,-oplg1ls /ustrio
SHARP,1891,designatedbyMoRIMoTo(1978).
Thisgenusischaracterizedbyacombinationof the followingcharacteristics:
head,prothorax,scapeandpedicelofantennae,andlegsyellowishinmale;theinteroc-
ular distance distinctly narrower than the interscroba1 distance; eyes very large,
stronglyexpandedlatero-posteriadandapproximatetoeachother;sternitescontracted
except forterminalone; terminalonelargeandstronglyslanting,andwithtenorso
yellowishciliaalonghindmargininmale;pygidiumwithatransversebladedkeelon
discinfemale;apodemesofmedianlobeusuallylocatedinthorax;ventralplateofme-
dianloberemarkablylongerthanthedorsalplateinmale.
XanthoderopyguskasaharaiSENoHetMATOBA,sp nov.
[Japanesename:Gomadan-kagibara-higenagazoumushi]
(Figs.1-3)
Length:3.6mm(fromapicalmarginofheadtoapicesofelytra).
Male. Colourblackwith theexceptionofmouthpartsother thanmandibles,
scapeandpedicelofantennae,hea(i,prothoraxexcludingcentralpartofpronotum,and
legs,whichareyellowish.Pubescencedense,brownishandyellowish;elytrawithtwo
pairsofyellowishringsatbasalpartsandapairofsimilarringsatapicalparts,and
withsixsmallpatchesofthesamecolouratthecentre.
Headvisible fromabove;eyesverylarge,stronglyexpandedlatero-posteriadand
approximatetoeachother;rostrumalmost at,transverse,about3.1timesaswideas
long;maximumwidthofrostrumabout4.4timesaswideastheshortestdistancebe-
tweeneyes.Antennaeshort,hardlyreachingthebasalmarginofpronotum,scapeand
pedicelovate,8ththeshortest,9thtriangular,apicallydilated,about2.1timesaslong
aswide,10thtriangular,apicallydilated,about2.0timesaslongaswide,11thspatu-
1ate,about19timesaslongaswide, proportionsin length from1st to 11th about
1.1:1.0:1.0:1.1:1.2:1.1:1.0:0.8:1.4:1.2:1.5.
pronotumtrapezoidal,andconvexabove,about14timesaswideaslong,widest
atbasal fourth;dorsal transversecarinaweaklyarcuate,andconnectedwitheachlat-
eral carinaat anobtuseangle, thelatterdeclivousinbasal half; carinuladistinct.
Scutellumminuteandpunctiform.Elytraoblong,about17timesaslongaswide,Pa一「
allot_sjded jn basal three-fifths, then narrowed posteriorly, basal margins almost
strajght;strja1puncturessmall,deep, intervals at,distinctly wider thandiameterof
stria1punctures.Pygidiumverylong,elongatedisoscelestriangular,somewhatinclined
forwards, about 18timesas longaswide, lateral marginsgraduallyconvergent to-
wardsole量apicesbearingtworeflexedspines;discswolleninapicalhalf,andwitha
medjan1ongitudinalkeelinapicalhalf,andwithtenorsoveryfinelonghairs.
prosternumdenselycoveredwithshallowbutdistinctpunctures;1stto4thvisible
sternites,viewedfromside,conjointlyoblique,5thhanging,withamedian1ongitudi-
360 Toshi0SENoHandIsa0MATOBA
11'◆:・ '
/ ii,1 °
1 2
Fi9S.1-3. Xanthode1'opyguskasaha1・alSENol-IetMAToBA,sp nov., fromMt.Gomadan,Wakayama
Pref.,CentralJapan;l,dorsal,2,Ie量lateral,and3,analviews ,
na1keel inapicalthree-fourths,andwithbrownciliainapicalpartwhichisyellowish
brown,notblack.Legsmoderatelylongandthin;anteriorfemurshorterthantheme-
dianwhich isshorterthantheposterior;anteriortibianearlyaslongasthemedian
whichisshorterthantheposterior.
Female. Un ewn.
Holotype Mt.Gomadan,WakayamaPref.,Japan,27-VII-1979, IsaoMAToBA
,
NewXa,1tholie,・opygusfromtheKiiPeninsula 361
leg.TheholotypeisdepositedinthecollectionoftheNationalScienceMuseum(Nat.
Hist),Tokyo.
Distribution. Japan(WakayamaProf.).
Notes. Intheabdominalconfigurationviewed fromside,thisspeciesissimilar
toXanthoderopyguswatanabe1SENoHfromtheIslandsofTsushimaorX.;ogasawaren-
sisSENoHfromtheIslandsofOgasawara,butcanbedistinguished fromthembythe
followingcharacteristics:pygidiumvery long,slender triangular, andwithamedian
longitudinalkeel inapicalhalf;5thvisiblestemitewithamedianlongitudinalkeel in
apicalthree-fourths,andsoon.
Thespecificnameisgiven inhonourof thelateMr. SumacKAsAHARAwho
editedthejournalinJapanese,Coleopterists'News,publishedbytheJapaneseSociety
ofColeoptero1ogy.
要 約
妹尾俊男・的場 績:和歌山県護摩壇山から発見されたカギバラヒゲナガゾウムシの1新
種. - 1979年の夏に和歌山県護摩壇山から細長い尾節板をもったカギバラヒゲナガゾウム
シ属の1種が, 筆者のひとり的場によって採集された. その標本は長いあいだ種名が特定され
ぬままになっていたが, 最近になって妹尾が精査した結果,尾節板は細長いだけではなく,先
端がふた山型になっていて, それぞれの頂点付近にそりかえったきわめて小さい棘をもち, ま
た中央には長い隆起線があり, さらに第5腹板中央にも隆起線がある, などの特徴をもってい
た. これらのきわめて特異な点により同属の他種から容易に区別でき, 新種と判断されたので,
x kasai,ara,と命名し, 記載した.種小名は, 長いあいだ甲虫ニュースの編集にたずさわられ,
昨年9月に亡くなられた笠原須磨生氏に因む.
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