Two new species of the genus Nepalomyia, with a key to species from China (Diptera: Dolichopodidae)

2005·0.17 MB·

by  Mengqing Wang

©EntomologicaFennica.17June2005
Two new species of the genus Nepalomyia,
with a key to species from China (Diptera: Dolichopodidae)
MengqingWang&DingYang*
Wang,M.&Yang,D.2005:TwonewspeciesofthegenusNepalomyia,witha
keytospeciesfromChina(Diptera:Dolichopodidae).—Entomol.Fennica16:
103–108.
ThespeciesofthegenusNepalomyiaHollis,1964fromChinaarereviewedand
keyed.Thefollowingtwospeciesaredescribedasnewtoscience:Nepalomyia
beijingensissp.n.andN.ruiliensissp.n.ThedistributionofthegenusinChinais
discussed.
M.Wang&D.Yang(correspondingauthor),DepartmentofEntomology,China
AgriculturalUniversity,Haidian,Beijing100094,China;KeyLabofInsectEvo-
lution&EnvironmentalChanges,CapitalNormalUniversity,Beijing100037,
China.E-mail:[email protected];[email protected]
Received2April2004,accepted30September2004
1.Introduction nan).AkeytotheChinesespeciesofthegenusis
presented.Typesofthenewspeciesaredeposited
The genus Nepalomyia Hollis, 1964 belongs to intheEntomologicalMuseumofChinaAgricul-
the subfamily Peloropeodinae. It has been turalUniversity,Beijing.
synonymized with Neugrigonella Robinson, Abbreviations are as follows: acr = acro-
1964byRunyon&Hurley(2003).Thegenusis stichal,ad=anterodorsal,av=anteroventral,dc=
characterizedbythearistaarisingfromtheapical dorsocentral,h=humeral,ih=innerhumeral,LI
concavity of the first flagellomere and hind =foreleg,LII–midleg,LIII=hindleg,npl=
tarsomere1ofmalebearing1basalspuronthe notopleural,oc=ocellar,pd=posterodorsal,ph=
posteriorsurfacedirectedupward.Itisknownto posthumeral, su = sutural, v = ventral, and vt =
occurintheHolarcticandOrientalRealms.There vertical.
is one species known from the Palaearctic, 23
from the Oriental, and four from the Nearctic.
Themajorreferencesdealingwiththetaxonomy 2.KeytospeciesofNepalomyia
of the genus are Dyte (1975), Hollis (1964), fromChina(males)
Negrobov (1984), Negrobov (1991), Robinson
(1964), Robinson & Vockeroth (1981), Runyon 1. Firstflagellomeredistinctlylongerthanwide
&Hurley(2003),VanDuzee(1914),Yang(2001, (longa-speciesgroup) 2
2002),Yang & Saigusa (2000, 2001a–b), Yang, – Firstflagellomerewiderthanlong(rarely as
Yang&Li(1998). longaswide)(henanensis-speciesgroup) 5
Inthepresentpaper,twospeciesofthegenus 2. Hind tarsomere 1 shortened and thickened;
are described as new to science: Nepalomyia hypandriumratherlargeandfurcateapically3
beijingensis sp. n. from North China (Beijing), – Hindtarsomere1normal 4
andN.ruiliensissp.n.fromSouthChina(Yun- 3. Firstflagellomeremuchelongated,2.5times
104 Wang&Yang (cid:127) ENTOMOL.FENNICAVol.16
longer than wide; basal spur on hind 14.Foretarsomere5dark;halteryellow 15
tarsomere1furcate.Yunnan – Foretarsomere5pale;halterdarkbrownwith
furcataYang&Saigusa,2001 yellowbase.Sichuan
– First flagellomere distinctly elongated, 1.3 pallipesYang&Saigusa,2000
times longer than wide; basal spur on hind 15.Hypandriumtrifurcateapically;cercuswith-
tarsomere1normal.Yunnan out distinct basal tubercle, but with short
crassataYang&Saigusa,2001 sparseshorthairs 16
4. Firstflagellomerewithlong,lowerapicalan- – Hypandriumnotfurcateapically;cercuswith
gle(1/3totallength);hypandriumwithshort basaltuberclebearingshorthairsand2very
apicalincision.Yunnan longbristles.Sichuan
dentataYang&Saigusa,2001 longisetaYang&Saigusa,2000
– Firstflagellomerewithshort,lowerapicalan- 16.Firstflagellomere0.6timesaslongaswide;
gle(about1/5totallength);hypandriumwith hypandriumwithmarginaldenticles, middle
deepapicalincision.Shaanxi lobe short with furcate tip in ventral view.
longaYang&Saigusa,2001 Yunnan pallipilosaYang&Saigusa,2001
5. Firstflagellomerewiderthanlong;5–6strong – First flagellomere nearly as long as wide;
dc 6 hypandriumwithoutmarginaldenticles,mid-
– First flagellomere as long as wide; 4 strong dle lobe long and broad in ventral view.
dc.Yunnan daliensisYang&Saigusa,2001 Yunnan ruiliensissp.n.
6. R2+3andR4+5normal 7 17.Firstflagellomerewithweaklowerapicalan-
– R2+3andR4+5distinctlythickenedbasally. gle 18
Sichuan,Yunnan – First flagellomere with distinct lower apical
trifurcataYang&Saigusa,2001 angle 22
7. Thoracic pleura brownish yellow to yellow 18.Hindtibiawith2ad 19
exceptpteropleuronorupperportiondark 8 – Hind tibia with 1 ad; cercus with long
– Thoracicpleurawhollymetallicgreen 13 geniculate basal process. Shaanxi, Yunnan
8. 5strongdc;thoracicpleurabrownish-yellow zhouzhiensisYang&Saigusa,2001
toyellow,exceptpteropleurondark 9 19.Hindtibiawith3pd 20
– 6strongdc;thoracicpleurabrownish-yellow – Hindtibiawith2pd 21
toyellow,exceptupperportiondark 12 20.Hypandrium without long lateral lobes;
9. Antennalscapeandpedicelyellow. cercus without basal tubercle. Henan
Yunnan 10 henanensisYang,Yang&Li,1998
– Antennaentirelyblack. 11 – Hypandrium with long lateral lobes; cercus
10.Halterbrownwithyellowbase;hypandrium with basal tubercle. Guizhou, Zhejiang
short and broad, with conical apex. Yunnan chinensisYang,2001
flavaYang&Saigusa,2001 21.Hypandriumsymmetrical; cercus with basal
– Halter yellow; hypandrium with 2 acute tubercle bearing dense long hairs. Yunnan
denticles.Guizhou piliferaYang&Saigusa,2001
bidentataYang&Saigusa,2001 – Hypandriumasymmetrical;cercuswithbasal
11.acrabsent.Yunnan tubercle bearing sparse short hairs. Yunnan
pingbianaYang&Saigusa,2001 yunnanensisYang&Saigusa,2001
– acr 4–5 irregularly paired. Yunnan 22.Halteryellow;hypandriumlongandnarrow,
luteipleurataYang&Saigusa,2001 with V-shaped apical incision. Shaanxi
12.Cercus with basal tubercle. Shaanxi brevifurcataYang&Saigusa,2001
tuberculosaYang&Saigusa,2001 – Halterdarkbrownwithyellowbase;hypan-
– Cercus without basal tubercle. Beijing drium short and broad, with small, quadrate
beijingensissp.n. apicalincision.Yunnan
13.5strongdc 14 daweishanaYang&Saigusa,2001
– 6strongdc 17
ENTOMOL.FENNICAVol.16 (cid:127) TwonewNepalomyiaspecies 105
Fig.1.Nepalomyiabeijing-
ensissp.n.,male.a.An-
tenna,lateralview.b.Hind
tarsomere1,posteriorview.
c.Wing,dorsalview.d.Gen-
italia,lateralview.e.Hy-
pandrium,ventralview.
3.Descriptionofnewspecies bristlesonthoraxblack;6strongdc,3–4irregu-
larlypairedacr(reachingthelevelofthethirddc);
Nepalomyiabeijingensissp.n.(Fig.1) 1longh,1ph,1somewhatshortih,1somewhat
Material examined. Holotype male: China: short su, 1 long anterior and 1 somewhat short
Beijing, Mentougou, Baihuashan, 13.IX.2003, posterior npl, 1 somewhat short anterior and 1
leg.B.Horvat. long posterior sa, 1 long psa. Scutellum with 2
Diagnosis.Thoracicpleuradarkbrownwith pairs of bristles, outer pair short and soft.
brownish-yellowlowerportion.6strongdc,3–4 Propleuronwith1shorthaironupperportionand
irregularlypairedacr.Firstcostalsectionslightly 1longblackbristleonlowerportion.
thickened.Halterdarkbrownwithyellowstem. Legsyellow;coxaeyellow,midcoxatinged
Malecercuswithoutbasaltubercle. withbrownonposterodorsalangle;midandhind
Description.Male.Headdarkmetallicgreen coxadarkerthanforecoxa;tarsibrownexcepttip
withgray-brownpollen;facewithpalegraypol- oftarsomere5darkbrown.Hairsandbristleson
len.Hairsandbristlesonheadblack;postocular legs black; forecoxawith 6 apical bristles, mid
bristlesblack,ventralhairspale.Ocellartubercle coxa with 1 anterior bristle, hind coxa with 1
weaklyraised,with2strongocand2shortposte- outer bristle. Mid and hind femora each with 1
rior hairs. Antenna blackish (Fig. 1b); first preapicalbristle.Foretibiaapicallywith1rowof
flagellomere0.7timesaslongaswide,withdis- short ad and 1 row of short av, apically with 2
tinctacute, lower apicalangle;aristawith basal shortbristlesandbrush-likelong,palehairs;mid
segment very short. Proboscis and palpus tibiawith2adand2pd,apicallywith4bristles(2
blackishwithblackhairs. longand2short);hindtibiawith1rowofpdon
Thoraxdarkmetallicgreenwithgraypollen; distal half, apically with 2 long bristles. Fore
mesonotumandscutellumwithgray-brownpol- tarsomeres1–4withshort,curved,ventralhairs;
len; pleura dark brown with brownish-yellow tarsomere1with2rowsofshortv;midtarsomere
lower portion, pteropleuron blackish. Hairs and 1with1rowofshortv.Hindtarsomere1shorter
106 Wang&Yang (cid:127) ENTOMOL.FENNICAVol.16
Fig.2.Nepalomyia
ruiliensissp.n.,male.
a.Antenna,lateral
view.b.Hindtarsomere
1,posteriorview.c.
Genitalia,lateralview.
d.Hypandriumandtip
ofaedeagus,ventral
view.
thantarsomere2,withbasalspuronposteriorsur- Female.Unknown.
facecurvedupwardandwith1vatextremebase, Remarks. Nepalomyia beijingensis sp. n. is
4avand5pv(Fig.1e);tarsomere2with2basalv. similar to Nepalomyia tuberculosa Yang &
Relativelengthsoftibiaand5tarsomeres:LI2.7: Saigusa from Shaanxi in having a short first
2.0:1.1:1.1:0.9:0.5;LII4.5:2.6:1.2:1.1:0.6 flagellomereandasymmetricalhypandrium,but
:0.4;LIII5.0:1.3:2.3:1.5:1.0:0.5. may be separated from the latter by the cercus
Winghyaline(Fig.1a),slightlytingedgray- which lacks a basal tubercle. In N. tuberculosa,
ish;veinsdarkbrown,firstcostalsectionslightly thecercushasathinbasaltuberclebearinghairs
thickened and brownish; R4+5 and M parallel (Yang&Saigusa,2001a).
distally; CuAx ratio 0.34. Squama brown with Distribution.NorthChina(Beijing).
darkbrownmargin,withblackhairs.Halterdark
brownwithyellowstem. Nepalomyiaruiliensissp.n.(Fig.2)
Abdomen metallic green with gray-brown Materialexamined.Holotypemale:Yunnan:
pollen. Hairs and bristles on abdomen black; Ruili,750ma.s.l.,3.V.1981,leg.F.Li.Paratype
venterwithsomepalehairs. 1 female: Yunnan: Ruili, 750m a.s.l., 3.V.1981,
Male genitalia (Fig. 1c–d). Surstylus of leg.F.Li.
epandriumwith dorsal lobeslightly longer than Diagnosis.Firstflagellomereaboutaslongas
ventral lobe, acute apically; ventral lobe rather wide;5strongdc,6–7irregularlypairedacr.Hy-
thick with pale hairs apically. Cercus without pandrium symmetrical, trifurcate; in ventral
basaltubercle,with2subapicalbristle-likepro- view,medianlobebroadwithtruncatetip;inlat-
cesses.Hypandriumshortandbroad,asymmetri- eralview,laterallobesstronglycurved,withthin
cal in ventral view. Aedeagus strongly curved apicalportions.
distally,withacuteprocesses. Description.Male.Headdarkmetallicgreen
Length.Body3.0mm;wing2.9mm. withgray-brownpollen;facewithpalegraypol-
ENTOMOL.FENNICAVol.16 (cid:127) TwonewNepalomyiaspecies 107
len.Hairsandbristlesonheadblack;postocular view, broad with long thin apex in lateral view.
bristles (including ventral hairs) black. Ocellar Cercus with black hairs basally, apically with
tubercle weakly raised, with 2 strong oc and 2 long,curvedprocess.Aedeagusratherthick,with
short posterior hairs. Antenna brown (Fig. 2a), narrowapexinlateralview, with2smallround
firstflagellomereaboutaslongaswide,withdis- processesinventralview.
tinct lower, apical angle, with long pale hairs; Length.Body3.3mm;wing3.6mm.
arista blackish, long, with short blackish hairs, Female.Bodylength3.2mm;winglength3.5
with rather short basal segment. Proboscis mm.Similartomale.
brownish with black hairs; palpus black with Remarks.Nepalomyiaruiliensissp.n.issimi-
blackhairs. lartoNepalomyiapallipilosaYang&Saigusain
Thoraxpalemetallicgreenwithgraypollen; having the symmetrical, trifurcate hypandrium,
pteropleuron dark. Hairs and bristles on thorax butmaybeseparatedfromthelatterbythefirst
black; 5 strong dc, 6–7 irregularly paired acr; 1 flagellomere about as long as wide, and
longh,1longph,1somewhatshortih,1some- hypandrium without marginal denticles. In N.
whatshortsu,1longanteriorand1shortposterior pallipilosa,thefirstfalgellomereis0.6timesas
npl,1shortanteriorand1longposteriorsa,1long long as wide, and the hypandrium has distinct
psa.Scutellumwith2pairsofbristles,outerpair marginaldenticles(Yang&Saigusa,2001b).
weak (1/6 inner pair). Propleuron with 1 black Distribution.SouthChina(Yunnan).
hair on upper portion, with 2 pale hairs and 1
black bristle on lower portion. Legs brownish-
yellow;coxaedarkbrown;tarsidistallyfromtip 4.Discussion
of tarsomere 1 brown to dark brown. Hairs and
bristles on legs black. Fore coxa with 5 apical Chinabelongsfaunisticallytotwozoogeographi-
bristles, mid coxa with 1 anterior bristle, hind cal realms: the Palaearctic and the Oriental.
coxa with 1 outer bristle. Mid and hind femora Seven zoogeographical regions of China have
eachwith1preapicalbristle.Foretibiaapically been designated by Zhang (1998): North-East
with3shortbristles;midtibiawith2ad,2pd,and China, North China, Neimeng-Xinjiang, Qing-
1av,apicallywith4bristles;hindtibiawith1ad, hai-Xizang, South-West China, Central China
2 pd, apically with 3 bristles. Hind tarsomere 1 andSouthChina.Thefirst4regionsbelongtothe
shorterthantarsomere2,withbroad,basalspur PalaearcticRealm,whilethelatter3regionsbe-
onposteriorsurfacecurvedupward,andwith6v longtotheOrientalRealm.
(Fig. 2d). Relative lengths of tibia and 5 Distribution of Chinese Nepalomyia species
tarsomeresLI3.1:2.5:?:?:?:?;LII2.8:2.0: isconcentratedintheOrientalRealm.Thereare
1.2:1.0:0.7:0.4;LIII5.0:1.1:1.6:1.4:0.9: 15speciesfromSouthChinaRegionand10spe-
0.4. ciesfromCentralChinaRegion.Onespecies,N.
Wings hyaline, slightly tinged with grayish; chinensis Yang, is widely distributed in both
veinsdarkbrown,R4+5andM1paralleldistally. SouthChinaRegionandCentralChinaRegion.
CuAxratio0.6.Squamabrownwithblackmar- UndoubtedlySouthChinaRegionisthecenterof
gin,withblackhairs.Halterdarkyellow. diversityfortheChineseNepalomyia.
Abdomen pale metallic green, with gray-
brownpollen;hairsandbristlesblack. Acknowledgements.TheauthorswishtothankDr.Bodgan
Male genitalia (Fig. 2b). Epandrium rather Horvat(Ljubljana)andFashengLi(Beijing)forcollecting
thespecimensandhelpinmanyways.Thisstudywassup-
thick,withfinger-likeapicallateralprocessbear-
ported by the National Natural Science Foundation of
ing1verylongbristle.Surstyluswiththickdorsal
China(No.30225009).
lobe bearing subapical lateral incision; middle
lobethickandcurvedatapex;ventrallobeslen-
derandstraight,withcurvedapex.Hypandrium References
(Fig. 2c) symmetrical, trifurcate; median lobe
somewhatrounded,withtruncateapexinventral
Dyte,C.E.1975:FamilyDolichopodidae.In:Delfinado,
view;laterallobelongwithacuteapexinventral M.D.&Hardy,D.E.(eds.),ACatalogoftheDiptera
108 Wang&Yang (cid:127) ENTOMOL.FENNICAVol.16
oftheOrientalRegion2:212–258.—TheUniversity Yang, D. 2001: Diptera: Dolichopodidae. In: Wu, H. &
PressofHawaii,Honolulu.459pp. Pan,C.(eds.),InsectsoftheTianmushanMountain:
Hollis,D.1964:OntheDipteraofNepal(Stratiomyidae, 428–441.—SciencePress,Beijing.764pp.[InChi-
TherevidaeandDolichopodidae).—Bull.Br.Mus. nese].
(Nat.Hist.)Ent.15:83–116. YangD.2002:Diptera:Therevidae,Dolichopodidae.In:
Negrobov, O. P. 1984: The genera of the family Huang,F.(ed.),ForestryInsectsofHainan:741–749.
Dolichopodidae(Diptera),newforthefaunasofPa- —SciencePress,Beijing.1064pp.[InChinese].
laearcticandUSSR.—Zool.Zhur.63(7):1111–1115. Yang,D.&Saigusa,T.2000:Newandlittleknownspecies
Negrobov,O.P.1991:FamilyDolichopodidae.In:So,& of Dolichopodidae from China (VII): Diptera from
Papp, L. (eds.), Catalogue of Palaearctic Diptera 7: Emei Mountain (2). — Bull. Inst. Royal Sci. Nat.
11–139.—AkademiaiKiado,Budapest.291pp. Belg.Ent.70:219–242.
Robinson, H. 1964: A synopsis of the Dolichopodidae Yang,D.&Saigusa,T.2001a:ThespeciesofNeurigonella
(Diptera)ofthesoutheasternUnitedStatesandadja- fromChina(Diptera:Empidoidea:Dolichopodidae).
centregions.—Misc.Publ.Ent.Soc.Am.4:103–192. —Ann.Soc.Ent.Fr.37:375–392.
Robinson,H.&Vockeroth,J.R.1981:Dolichopodidae.In: Yang,D.&Saigusa,T.2001b:Newandlittleknownspe-
McAlpine, J. F. et al. (eds.), Manual of Nearctic ciesofDolichopodidaefromChina(XI).—Bull.Inst.
Diptera,1:625–639.—ResearchBranchAgriculture RoyalSci.Nat.Belg.Ent.71:237–256.
CanadaMonographNo.27.674pp. Yang,D.,Yang,C.&Li,F.1998:Threenewspeciesof
Runyon,J.B.&Hurley,R.L.2003:RevisionoftheNearc- DolichopodidaefromHenan(Diptera).—In:Shen,
ticspeciesofNepalomyiaHollis(=NeurigonellaRob- X.&Shi,Z.(eds.),TheFaunaandTaxonomyofIn-
inson) (Diptera: Dolichopodidae: Peloropeodinae) sectsinHenan2:81–85.ChinaAgriculturalScientech
withaworldcatalogue.—Ann.Ent.Soc.Am.96(4): Press,Beijing.368pp.[InChinese].
403–414. Zhang,Y.Z.1998.Thesecondrevisionofzoogeographi-
VanDuzee,M.C.1914:NewspeciesofNorthAmerican cal regions of China. — Acta Zootaxon. Sin. 23
Dolichopodidae(Dipt.).—Ent.News25:433–443. (suppl.):207–222.[InChinese].