A new species of the genus Celosia Winnertz from Tibet, China (Diptera: Mycetophilidae)

2016·1.1 MB·

by  Jian Cao

©EntomologicaFennica.31August2016
Anew species of the genus Coelosia Winnertz
from Tibet, China (Diptera: Mycetophilidae)
JianCao&ZhiweiHuang
Cao,J.&Huang,Z.W.2016:AnewspeciesofthegenusCoelosiaWinnertzfrom
Tibet,China(Diptera:Mycetophilidae).—Entomol.Fennica27:77–80.
Anew species of the genus Coelosia Winnertz, l863 fromTibet, China is de-
scribed,figuredanddiscussed.CoelosiatibetensisCao&Huang,sp.n.isthe
secondCoelosiaspeciesfromChina.Twoocelli,clearbrownshadingsonthe
wing and the shape of the gonostylus are good characters to separate it from
Coelosiatenella,theotherCoelosiaspeciesfoundinChina.
J. Cao, Chongqing Three Gorges Vocational College, Wanzhou, Chongqing
404155,China;E-mail:[email protected]
Z.W. Huang, Chongqing Three Gorges Vocational College, Wanzhou, Chong-
qing404155,China;E-mail:[email protected]
Received29January2015,accepted20January2016
1.Introduction microvialwithglycerin.Themorphologicalter-
minologyusedfollowsthatofSølietal.(2000).
Coelosia Winnertz, l863 (Diptera: Nematocera:
Mycetophilidae) is a small genus with wide
distribution.About9knownspeciesarefromthe
3.Taxonomy
PalaearcticandOrientalregions,butfromChina
C. tenella (Zetterstedt, 1852) was the first re-
cordedspeciesinthisgenusin1988(Hackmanet 3.1.IdentificationofthegenusCoelosia
al.1988).
In this paper, we report and describe a new The genus Coelosia is distinguished fromother
speciesofthegenusCoelosiafromTibetChina. related genera by the following characters (Søli
ThespecimenswerediscoveredintheInsectCol- 1997): Frons bare, frontal tubercle simple and
lection of Chongqing Three Gorges Vocational pointed.Labrumwelldeveloped,withorwithout
College,Wanzhou,Chongqing,P.R.China. setae. Third palpomere without distinct sensory
pit. Mesopleuron, laterotergite and mediotergite
allbare.Wingsurfacewithsmall,irregularlyar-
2.Materialsandmethods ranged microtrichia only. Costa produced well
beyond tip of R. Sc usually with some setae,
5 l
Thespecimenswerecollectedbysweep-netting endingincosta.NeitherSc norR present.Point
2 4
andpreservedin80%alcohol.Thegenitaliawere offurcationofcubitalforkdistinctlybeyondlevel
treatedinthestandardway(heatedinasolution of point of furcation of media; both cubital
of 10% KOH, neutralized in acetic acid and branchesstraightornearlyso.Tibiaewithdevel-
washedindistilledwater),andplacedintoglyc- oped setae. Male gonostylus usually with dis-
erin for detailed study and later preserved in a tinct,well-developedinteriorappendage.
78 Cao&Huang (cid:127) ENTOMOL.FENNICAVol.27
Fig.1.StructuresofmaleCoelosiatibetensis,sp.n.–a.Wing.–b.Terminalia,ventralview.–c.Gonostylus,in-
teriorview.–d.Tergite9andcerci,dorsalview.Scalebars,a:1mm;b–d:0.1mm.
3.2.DescriptionofCoelosiatibetensis conspicuousstripesondiscbyoneortworowsof
Cao&Huang,sp.n. darkbrownbristles,medianyellowstripebroad,
extendinganteriorlytopronotum,twoadmedian
Type material. Holotype # (20100032). China, stripes.Scutellumbrownwithtwostrongbristles
TibetAutonomousRegion,ChamdoPrefecture, on posterior margin. Pleura and mediotergite
Zhugu Temple, 96°59’44’’E, 31°5’31’’N, 4,100 blackbrown.Halteryellow.
m a.s.l., 14.VIII.2010, Jian Cao leg. Paratypes Wings(Fig.1a).Hyaline,withbrownshading
1#,1$,withsamedataasholotype.Alltypesde- extending from middle of cubical to apex of
posited in the Insect Collection of Chongqing CuA,veryfaintbrownshadepresentsubapically
2
Three Gorges Vocational College, Wanzhou, onM,M andCuA.Costa,R andR withsetae.
1 2 1 1 5
Chongqing,P.R.China. CostaproducedbeyondtipofR,covering1/2of
5
Description. Male (Fig. 1a–d). Lengths: distancetoM.Scbare,endinginCslightlybe-
1
body:5.14mm;wing:4.55mm. fore Rs. Sc absent. Point of furcation of M
2
Head. Yellowish brown. Two ocelli, median slightlybeyondthelevelofRs;pointoffurcation
ocellusentirelyreduced.Antennae:scapeandpe- CuAdistinctly beyond the point of furcation of
dicel cup-shaped, obscurely yellow. Flagellum: M.
first flagellomere yellowish brown, obscurely Legs. Yellow, tibial spurs black. Fore ba-
yellowbasally;remainingflagellomeresyellow- sitarsus subequal in length to fore tibia, mid
ishbrown;terminalflagellomerewithasmallpa- basitarsus 0.7× length of mid tibia, hind basi-
pilla.Palpiyellowtoobscurelyyellow,terminal tarsus0.6×lengthofhindtibia.Clawsminute.
palpomerelong. Abdomen.Slender,clothedwithmanymod-
Thorax. Mesonotum brown, three separated eratesetae.Tergite1darkbrown,tergites2and6
ENTOMOL.FENNICAVol.27 (cid:127) Coelosiatibetensissp.n.fromTibet 79
Fig.2.FemaleTerminaliaofCoelosiatibetensis,sp.n.–a.Ventralview.–b.Dorsalview.–c.Lateralview.
Scalebars:0.1mm.
dark brown, yellow on posterior fourth, tergites CoelosiadistylataSøli,1997fromNepalinhav-
3–5 dark brown, yellow on posterior half. Seg- ingtwoocelli.However,itiseasilydistinguished
ments7and8stronglyreduced,retractable.Ter- bytheoutlineoftergite9beingelongated,about
minalianotrotated. 2.0×aslongaswide,withbarestripeonmedial
Hypopygium (Fig. 1b–d). Brown, elongate. areafrombasetoapex(about1.7×aslongaswide
Tergite9elongated,about2.0×aslongaswide, andwithoutbarestripeinC.distylata).Theshape
with a bare stripe on medial area from base to ofthegonostylusisalsoagoodcharactertosepa-
apex.Cercilong,slender,separated.Gonocoxite rateitfromC.distylata(seeSøli1997:Fig.15).
fusedalongof1/2length,withfinesetaeexcept Clear brownshadingsonthewing(Fig. 1a) are
medialborderwithblackstoutsetae.Gonostylus peculiarandabsentinC.distylata.Femaletermi-
well developed, bowl-shaped, basal 1/3 narrow, naliaarealsodifferentfromthoseinC.distylata.
onlythehalfwidthofapex,dorsalapexwithone
dark tooth, ventral apex blunt and round, many
long bristles on dorsal side and many relatively 4.Discussion
short bristles on ventral side. Y-shaped interior
appendageatthebaseofgonostylusyellow,ex- So far, Coelosia tibetensis sp. n. is the second
ceptupwardfinger-likeprojectionblack-brown, speciesinthegenusCoelosiafoundinChina.The
bare, only downward projection with four very first recorded species is Coelosia tenella
strongbristles.Aedeagusshort,wellsclerotized. (Zetterstedt, 1852) (Hackman et al. 1988). The
Female(antennaelost).Lengths:Body:4.94 specimens were collected from an altitude of
mm;wing:4.38mm. 4,100 m in the eastern Tibetan Plateau, China.
Colourationasinmale,butabdominaltergite Thediscoveryisencouraging.Thisnewspecies
1darkbrown,tergites2–5darkbrown,yellowon andC.distylatabothoccurathighaltitudesinthe
posteriorthird,tergite6darkbrown.Femaleter- northernpartsoftheOrientalRegion.Thisfind-
minaliainFig.2a–c. ing also confirms Søli’s (1997) view that all
Etymology.Thenamereferstothetypelocal- southern records originate from high altitudes.
ity:TibetAutonomousRegion. Weforeseethattherearemorespeciesawaiting
Remarks. The new species is similar to discoveryintheTibetanregionofChina.
80 Cao&Huang (cid:127) ENTOMOL.FENNICAVol.27
Acknowledgements.WethankourfriendsHuizhiYangand Søli,G.E.E.,Vockeroth,J.R.&Matile,L.2000:4.Fami-
ChunhuaWangfortheirhelpincollectingspecimens.We liesofSciaroidea.—In:Papp,L.&Darvas,B.(eds),
gratefullyacknowledgetwoanonymousrefereesfortheir ContributionstoaManualofPalaearcticDiptera(with
criticalreviewofthemanuscript. SpecialReferencetoFliesofEconomicImportance):
49–92.ScienceHerald,Budapest.604p.
Søli, G. E. E. 1997: The systematics and phylogeny of
CoelosiaWinnertz,1863(Diptera,Mycetophilidae).
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