Two New Cnodalonine Beetles (Coleoptera, Tenebrionidae) from Southeast Asia

6 Pages·2001·6.5 MB·English

by  Masumoto, K

Elytra,「okyo,29(2):304-309,November15,2001
TwoNewCnoda1onineBeetles(Coleoptera,Tenebrionidae) from
Southeast Asia
KimioMAsUMoTo
InstituteofHumanLivingSciences,0tsumaWomen'sUniversity,Tokyo,102-8357Japan
Abstract Twonewcnoda1oninetenebrionidbeetles from Southeast Asiaarede-
scribedunderthenamesAugolesthus(s.str)yoshihikoisp novand「et,-agonomeneskut-o-
sawa1sp nov.
Onthisoccasion,Iwouldliketoselecttwosmallbutverybeautifulspeciesofthe
tenebrionidtribeCnodalonini,onebelongingtothegenusAugolesthusandtheotherto
thegenus netragonomenes.ThissmallpaperisdedicatedtothememoryofthelateDr.
YoshihikoKUROSAWA,ex-directoroftheDepartmentofZoology,NationalScienceMu-
seum(Nat.Hist), Tokyo,whoconstantly ledmetothestudyofcoleopteran insects,
particularlythedungbeetles, for45yearssincethetimeofmyjuniorhighschoolstu_
dent.
IwishtoacknowledgemyindebtednesstoDr.WolfgangScHAwALLER,Staatliches
MuseumfiirNaturkundeinStuttgart forpermissiontoexamineinvaluablespecimens
preserved in that museum. Appreciationshouldbeexpressed toMr. Seiji MORITA
(Tokyo) fortakingphotographsinsertedinthispaper.
Augolesthus(s.str)yoshihikoisp nov.
(Figs.1,3&4)
Brownishblackwithweakdarkgreenishlustre,hea pronotum,scutellum,elytra
andlegsdarkblue,elytrawith feeblegreenishlustre, basalpartsofantennae, tarsj,
mouthpartsandgulayellowishbrown,hairsonventralsurfaceofprotibiaerather
golden; dorsalsurfacestrongly,metallicallyshining,ventralsurfacemoderatelyand
somewhatalutaceouslyso.Bodyelongatedelliptical,moderatelyconvexabove.
Headsubhexagonal,gently inclinedapicad,coveredwithmicroscopicallyisodia_
metricsculpture,moderatelycloselybutrather irregularlypunctate;clypeusweakly
raise somewhatwidelyV-shaped, triangularlyemarginatein front,eachsideofthe
emargination rounde fronto-clypea1bordergrooved; genaeratherax-shape raised
laterad,depressedinbasalparts,scatteredwithminutepunctures; fronswide,gently
declinedto fronto-clypea1groove,precipitousinlateralparts,bordered fromtempera
byadeepsulcus,diatoneabout3.3timesthewidthoftransversediameterofaneye.
TwoNewCnodalonineTenebrionidsfromSoutheastAsia 305
Eyesrathertransverselycomma-shapedindorsalview,obliquelyinlaidintoboa and
gentlyconvexlaterad.Antennaemoderatelyclavate,gently attened,reachingthemjd_
dieofpronotum,ratioofthelengthofeachsegmentfrombasetoapex:0.39,0.2,0.37,
0.32,0.31,0.28,0.31,0.34,0.32,0.36,0.58.
Pronotumsubquadrate, 1.36timesaswideaslong,widestslightlybehind the
middle;apexweaklyproducedinmiddle,gentlysinuousoneachside,neitherbordered
normargined;basemoderatelybisinuous,borderedbyapunctategroove;sidesgently
declined to lateralmargins,whichareborderedbygroovesandsparsely crenulate;
frontanglesrectangular,hindanglesacute;discmoderatelyandevenlyconvex,weakly
micro-isodiametrica11y sculptured, moderately scattered with punctures, which are
slightly larger than thoseon frons, and sometimes intermixed with smaller ones.
Scutellumratherwidelysubcordate, feeblysculptured,sparselyscatteredwithminute
punctures.
Elytrasomewhatelongatedelliptical,1.63timesas longaswide,2.69timesthe
lengthand1.14timesthewidthofpronotum,subpara11e1-sided;dorsumratherstrongly
convex,transverselydepressedatbasal2/9,swollenatbasal t/8,depressedinareabe-
tween theswellings;discvery feeblymicro-isodiametrica11ysculptured, finelypunc-
tate-striate,thestriaesometimesinterruptedinmedic-basalpart,thepuncturessome-
whatlongitudinal;intervalsslightlyconvexininteriorpartsandstronglyconvexinlat-
eral parts, microscopically, sparsely punctate, very weakly, somewhat transversely
micro-aciculate;humerinarrowlyswollen;apicessimplyrounded.
Profemurwithatoothattheanterioredgeofdorsal facenearapex;maleprotibia
obtuselytoothedatbasalt/3ondorsalface,noticeablygougedandhairedinapical2/3
ofventral face; ratiosofthelengthsofpro-,meso- andmetatarsomeres:0.24,0.18,
0.2,0.22,1.2;0.27,0.21,0.2,0.22,1.22;0.62,0.31,0.23,1.22.
Malegenitaliaslender, 2mm in length and0.27mm in width, very slightly
twisted, feebly constrictedinanareabetweenbasalpieceand lateral lobes, gently
curvedinlateralview;fusedlaterallobesrathernib-shaped,0.49mminlength.
Bodylength:7.4mm.
Holotype: , “N-Sumatra: Medan/Bukit Lawang/1l.-12. 10, 1990/leg. A.
RIEDEL”(SMNS).Paratype: lex.,samedataasfortheholotype.
Notes. This new species resembles Augolestus (s. str) borneensis (KULzER,
1952) inhavingthebodysubpara1le1-sidedandwithdorsalsurfacebluish,butcanbe
distinguishedfromthelatterbythebodymoreelongatewithclypeussomewhatwidely
V-shapedand triangularlyemarginate in front, femoraand tibiaealmost darkblue
(theseexcept front tibiaelightbrowninA borneensls),andprofemurwithatoothat
theanterioredgeofthedorsal faceneartheapex.
KeytotheSpeciesoftheGenusAugolesthus
1(4) Elytraneither transverselydepressednorconvexanteriorly;protibiaeneither
thickenednorhaired;elytrawithatransversefasciabeforethemiddle....
306 Kimio MAsUMOT0
SubgenusF,alsoaugolesthusMAsUMoTo
2(3) Headconvex but weakly depressed; pronotummoreclosely punctate,with
apexmorestronglyproduced forwards;elytra1fasciashorter,lyinginbasal
2/5;intervalsfiat;8-8.5mm;Taiwan _ _ .A.(F)kurosawa1MAsuMoTo
3(2) Headconvexbutnot depressed;pronotum lesscloselypunctate, withapex
lessstronglyproducedforwards;elytra1fascialonger,lyinginbasal1/3;in-
tervalsgentlyconvex;7-8mm;NorthVietnam _ _ A.(F)pulcher(Pfc).
4(1) Elytratransverselydepressedanteriorlyandoftenconvexbeforethedepres-
sion;protibiaedistinctlythickenedandhaired;elytrawithatransversefas-
ciainsomespeciesbutwithoutinothers
SubgenusAugolesthusMoTscHULsKY
5(12) Elytrawithouttransversefasciainthemiddle.
6(7) Body ratherelongate; elytra1striaedeeper; intervalsmorestronglyconvex;
largerspecies(7.5-8.8mm);Thailan(i,Laos_ A tha11andzcu.sMAsuMoTo.
7(6) Bodyoblong-ovate; elytra1striaeshallower; intervals lessstrongly convex;
smallerspecies(6.2-8.5mm).
8(9) Elytra1intervalsflat;puncturesondorsalsurfaceweaker; lateral marginsof
pronotumnotcrenulate;7mm;Singapore _ _ A.protensus(FAIRMAIRE).
9(8) Elytralintervalsdistinctlyconvexinlateralportions;puncturesondorsalsur-
facestronger;lateralmarginsofpronotummoreorlesscrenulate.
1 2
Figs. 1-2. Habitus. - 1, Augolesthus(s.str)yoshihiko1sp nov.,holotype, 3;2, 「etragonome,1es
kurosawaisp nov.,holotype,(3.
TwoNewCnoda1onineTenebrionidsfromSoutheastAsia 307
10(11) Profemurwithatoothatanterioredgeofdorsal facenearapex;clypeusno_
ticeablytriangularlyemarginateinfront;7.4mm;Sumatra
A yoshihiko1sp
nov.
11(10) Profemurwithouttoothatanterioredgeofdorsal facenearapex;clypeusnot
sonoticeablytriangularlyemarginateinfront;6.2-8.5mm;Borneo......
A borneensis(KULzER)
12(5) Elytrawithadistincttransversefasciainthemiddle.
13(14) Profemurwithouttoothatanterioredgeofdorsal facenearapex;elytra1fas_
cialyingslightlybeforethemiddle;8-9.5mm;Borneo,Sumatra........
A.purpureOftasciatusMOTSCHULSKY
14(13) Profemurwithatoothatanterioredgeofdorsalfacenearapex.
15(16) Bodynoticeablyrobust(profemurwithadistincttoothnearapex;elytra1fas-
ciashortandlyinginbasal t/3,withanteriormarginproduced forwards);
8.5-9mm;Borneo A. latus(KULzER)
16(15) Bodynoticeablyslender.
17(18) Female(type!):pronotumwithapexdistinctlynarrowerthanbase;profemora1
toothtriangularandacute;elytra1fasciashorter, lyinginbasal t/3;9mm;
Java A.v1olaceofcasclatus(Pfc)
18(17) Female:pronotumsomewhatbarrel-shaped,withapexaswideasbase;pro-
femoral tooth obtuse; elytra1 fascialonger, lying inbasal 2/5; 7-8mm;
MalayPeninsula A ando1MAsUMoTo
T‘etragonomeneskurosawaisp nov
(Figs 2,5&6)
Brownishblackwithweakdarkbluishtinge,headgoldengreenwith feeblebluish
tinge,pronotum, scutellumanddorsal surfacesof legs dark bluewith very feeble
greenishtinge,basal t/4ofelytradarkblue,apical3/4ofelytradeeppurple; head
sericeouslyshining,pronotum,scutellumandlegsmoderatelyshining,basal t/4ofely-
trastronglyshining,apical3/4ofelytraratherweaklyshining.0b1ong-ovate;strongly
convexabove.
Head transversely subhexagonal, strongly raised in basal part, depressed in
clypeusandgenae,microsculptured, ratherclosely,finelypunctate;clypeussomewhat
invertedlytrapezoidal,veryslightlybilobedin front,raisedmedially, feeblydepressed
oneachside, fronto-clypea1sutureindistinctand irregularly punctate;genaebefore
eyesgentlyraisedinbasalparts,flattenedinanteriorpart,withoutermarginsrounded,
thosebehindeyessubpare11e1-sided,weaklydepressed; fronsraisedwithadeclivityin
middle,noticeablyswollenoneachside,outermarginsoftheswellingsprecipitousand
deeplysulcate;diatoneabout3timesthewidthoftransversediameterofaneye.Eyes
subreniform,gently convex latera obliquely and roundly inlaid into head, interior
marginsnotsulcate.Antennaesubclavate,reachingthemidstofpronotum, ratioofthe
lengthofeachsegment frombasetoapex:0.38,0.2,0.33,0.24,0.22,0.45,0.49,0.51,
308 Kimio MAsUMoTo
0.52,0.55,0.75.
Pronotumsubquadrate,1.22 timesas wideas long; apex feebly producedand
arched;basetriangularlyproduce sinuousoneachside,finelyrimmed;sidessteeply
declinedto lateralmargins,whichareslightlyexpandedlatera very finely rimmed
andcrenulate; frontanglesobtuse, hindanglesnearly rectangular, weakly projected
postero-1aterad;discstronglyconvexandalmosthemispherical,highestatapical2/5,
veryslightlymicrosculptured, rathercloselypunctate,thepuncturessmall,somewhat
ovate, and feeblyumbilicatewithminutehairs. Scutellum triangular withslightly
emarginatebaseandfeeblyroundedsides,microscopically,transverselywrinkled,scat-
teredwithsmallpuncturesinlateralparts.
Elytrasubelliptica1,1.6timesaslongaswide,2.5timesthelengthand139times
thewidthofpronotum,widestat themiddle; dorsumstronglyconvex inapical3/4,
highestatthemiddle,gently,obliquelydepressedinareaaroundbasal t/4;discfinely
punctate-striate,thepuncturesinbasal t/4(darkbluishpart)slightlylargerthanthose
in the remaining part, 5th striadeepened close to base; intervals gently convex,
sparselyscatteredwithsmallpunctures, furtherwithmicroscopicpunctureswhichare
visibleunder40X,weakly,rathertransverselyaciculate;humeriratherstronglyswollen
inagibboseshape;apicesveryfeebly,roundlyproduced.
Legs ratherstout, withoutspecial modification; ratios of the lengths of pro-,
3 4
Figs. 3-6. Malegenitalia. - 3-4.Augolesthus(s.str)yoshihikoisp nov;3,dorsal view;4,lateral
view. - 5-6,「etrago,tomeneskurosawalsp nov;5,dorsalview;6,lateralview.
TwoNewCnoda1onineTenebIionidsfromSoutheastAsia 309
meso-andmetatarsomeres:0.31,0.21,0.2,0.23,1.2;0.34,0.21,0.22,0.23,1.22;0.62,
0.27,0.21,1.2.
Malegenitaliashortfusiform,1.1mminlengthand0.2mminwidth,withabasal
part weakly curved in lateral view; fused lateral lobes0.3mm in length, gently con-
strictedinmiddle,withspatulateapices.
Bodylength:3.5mm.
Holotype: 3,“BORNEO:Sarawak/Belanga,LongLinau/17.-21.3.1990/ leg.A.
RIEDEL”(SMNS).
Notes. Nospeciesallied tothisnewtenebrionidhashithertobeen known, in
viewof itsremarkablecolorationandpeculiarshapeoftheheadandelytra.Judging
fromgeneralappearance,e.g., thesubpara11e1-sidedbodyandthemoderately convex
eyes,thisnewspeciesseemstobelongtothegenusnetragonomenes. Italsoresembles
somespeciesof the genus Malayaplamlus in having themodified head and the
stronglyconvexposteriorpartsoftheelytra.Itmay,therefore,beanannectentofthe
abovetwogenera.Morethan80speciesofthegenusTettragonomenesaredistributed
overEastAsiaandthenorthernpartofAustralia.Whenadetailedstudyismadeinthe
future,thisgenuswouldpossiblybedividedintoseveralsubgeneraorgenera,because
thegenusinthecurrentsenseisobviouslyheterogeneous.
要 約
益本仁雄:東南アジア産ニジゴミムシダマシ族の2種. - 東南アジア産ゴミムシダマシ科
ニジゴミムシダマシ族(cnodalonini)の2新種を,永年ご指導くださった故黒澤良彦博士に因み,
Augolesthus(s.str)yoshihiko1spnovおよび「etragonomeneskurosawaispnov.と命名して記載した.
References
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