Two peculiar new Orfelia Costa species from Georgia (Diptera: Keroplatidae)

2013·2.1 MB·

by  Olavi Kurina

©EntomologicaFennica.21March2013
Two peculiar new Orfelia Costa species from Georgia
(Diptera: Keroplatidae)
OlaviKurina&SiiriJürgenstein
Kurina,O.&Jürgenstein,S.2013:TwopeculiarnewOrfeliaCostaspeciesfrom
Georgia(Diptera:Keroplatidae).—Entomol.Fennica24:21–27.
TwonewKeroplatidaespecies,Orfeliageorgicasp.n.andOrfeliatrifidasp.n.,
aredescribedonthebasisofmalematerialcollectedfromGeorgia(Caucasus).
Thetwospecies,representingthefirstrecordsofthegenusinthecountry,are
photographed,theirterminaliaillustratedandsystematicsdiscussed.
O. Kurina & S. Jürgenstein, Institute of Agricultural and Environmental Sci-
ences,EstonianUniversityofLifeSciences,Riiast181,51014Tartu,Estonia;
Correspondingauthor’se-mail:[email protected]
Received21August2012,accepted29October2012
1.Introduction tively.However,thekeysincludeonlyaselection
oftheactualspeciesintheseareas,hence,addi-
ThegenusOrfeliaCosta,1857,thenominalge- tional literature including descriptions of single
nusofOrfeliiniisplacedinthesubfamilyKero- species (e.g. Zaitzev & Menzel 1996, Bechev
platinaeoffamilyKeroplatidae(Sølietal.2000, 2002)shouldbeconsulted.
Evenhuis2006).Withinthetribiallimits,thege- Species of Keroplatidae are rather superfi-
nus is defined by the following combination of cially known in Transcaucasia (i.e. Armenia,
characters: short mouthparts, bare laterotergite, AzerbaijanandGeorgia).Ninespecieshavebeen
setosemediotergite,baremedialandcubitalveins recorded in the area while only one species
and regular rows of tibial setae (e.g. Søli et al. (Isoneuromyiasemirufa(Meig.))hasbeenprevi-
2000). ouslyreportedfromGeorgia(Zaitzev1994).Five
Altogether42specieshavebeenrecordedup additional keroplatid species are known from
tothepresent,viz.23speciesfromthePalaearctic neighbouringNorth-,West-andCentral-Cauca-
region including 14 from Europe, 11 from the sus (see Joost & Plassmann 1976, 1979, 1985,
Nearcticregion,7fromtheOrientaland2from 1992). Only two Orfelia species, O. matilei
the Neotropical region (Evenhuis 2006). One Zaitzev, 1994 and O. unicolor (Staeger, 1840),
species,O.discoloria(Meigen,1818),isknown arerecordedfromthewholeCaucasianregionup
tohaveaHolarcticdistribution.Nospecieshave tothepresent(Zaitzev1994).
yet been reported from the Afrotropical and The aim of the current communication is to
Australasianregions.Byunidentifiedspecimens, describe and illustrate two new Orfelia species
thegenushasbeenknownalsofromBalticamber fromGeorgiaanddiscusstheirsystematics.
(Evenhuis1994).
Thereisnosynopsistocoverallknownspe-
cies,whilethemostcomprehensivekeysarepub- 2.Materialandmethods
lished for European and Palaearctic species by
Hutsonetal.(1980)andZaitzev(1994),respec- AllmaterialhasbeencollectedbyO.K.duringa
22 Kurina&Jürgenstein (cid:127) ENTOMOL.FENNICAVol.24
Fig.1.–a,b.CollectinglocalityinsurroundingsofMarelisivillagesoutheastofSurami,Georgia.–c.Habitusof
Orfeliageorgicasp.n.–d.HabitusofOrfeliatrifidasp.n.,terminaliadetached.Scalebar=1mm.
recent expedition to Georgia. Thecollecting lo- using a U-DAdrawing tube attached to a com-
cality, surroundings of Marelisi village near poundmicroscopeOlympusCX31.Habituspho-
Borjomi-KharagauliNationalPark,ischaracter- tos(Fig.1c,d)weremadeinethanolmedium,us-
ised by hornbeams, beech, chestnut and lime ing a Canon 7D camera in combination with
dominateddeciduousforestalongslopesofhills CanonMP-E65(F2.81-5×)lens(seealsoKurina
(Fig. 1a) including many small and narrow ra- 2008).Maleterminaliaarefiguredinthreediffer-
vines(Fig.1b). ent positions: ventrally, laterally and dorsally,
All material was collected by sweep netting while tergite 9 was detached and figured sepa-
andwasinitiallypreservedin70%ethanol.After rately.AdobePhotoshopCS5softwarewasused
study,someofthespecimensweremountedfrom toaddshadingtothefigures.
alcohol, using a chemical method described by Morphological terminology follows Søli
Vockeroth(1966),anddouble-mounted.Forade- (1997).Themeasurementsaregivenastherange
tailed study and illustration of terminalia, they of measured specimens followed by the mean
were detached and treated by the method de- valuewhenatleast5specimensweremeasured,
scribedby Kurina(2003),beforebeinginserted while the measurements from the holotype are
into glycerine. After examination, terminalia giveninsquarebrackets.Theratiosofthethree
werestoredintheglycerinemediuminaspecial apicalpalpalsegmentsaregivenas3rd:4th:5th.All
plasticmicrovialattachedtothesamepinasthe material is deposited in the insect collection in
mountedspecimen. IZBE,InstituteofAgriculturalandEnvironmen-
Illustrations of the terminalia were prepared tal Sciences, Estonian University of Life Sci-
ENTOMOL.FENNICAVol.24 (cid:127) TwonewOrfeliaspeciesfromGeorgia 23
Fig.2.Orfeliageor-
gicasp.n.,maleter-
minalia.–a.Ventral
view.–b.Lateral
view.–c.Dorsal
view,tergite9de-
tached.–d.Tergite
9.Scalebar=0.1
mm.
ences(formerInstituteofZoologyandBotany), Paratypes. #, same as holotype except 41°56’
Tartu,Estonia. 22.7’’N 043°16’37.3’’E, 693 m a.s.l. [on pin,
IZBE];10##,sameasholotypeexcept41°57’
56.0’’N 043°17’20.7’’E, 412 m a.s.l., sweeping
3.Systematics 19.V.2012[drymountedfromalcohol,IZBE].
Additional material studied. 5 ##, same as
3.1.Orfeliageorgicasp.n.(Figs.1c,2a–d) holotype except 41°57’56.0’’N 043°17’20.7’’E,
412 m a.s.l., sweeping 19.V.2012 [in alcohol,
Type material. Holotype. #, GEORGIA, Mare- IZBE].
lisisoutheastofSurami,41°56’48.0’’N043°17’ Description. Male. Body length 5.49–6.50,
03.3’’E, 448 m a.s.l., sweeping 20.V.2012, O. 5.97 [6.03] mm, wing length 4.76–5.16, 4.87
Kurina leg. [dry mounted from alcohol, IZBE]. [4.82]mm(n=5).
24 Kurina&Jürgenstein (cid:127) ENTOMOL.FENNICAVol.24
Head.Blackishbrownwithdarksetae.Three 0.26,0.23[0.26]timesaslongasapicalportionof
ocelliinshallowtriangulararrangement,median R5.R4endsincosta0.3distancefromR1toR5.
ocellussmallerthanlaterals.Clypeusrectangular, Costareachesabout0.3distancefromR5toM1.
brown,withdarksetaeonlowerpart.Mouthparts m-stemabout1.2aslongasbasalportionofR5.
yellow.Maxillarypalpusyellow,withdarksetae. Branches of medial fork apically parallel.
Ratiosofthreeapicalpalpalsegments1.0:0.83– Branchesofcubitalforkgraduallydivergentto-
1.00,0.93[1.00]:1.47–1.93,1.67[1.93];penulti- wardswingmargin.
mate segment 2.14–2.67, 2.46 [2.14] times as Abdomen. Dorsoventrally slightly com-
longaswide,lastsegment6.00–7.75,6.85[7.25] pressed, brown. First segment with yellow
timesaslongaswide.Antennadarkbrownwith posterolateralspots,IItoVIsegmentswithyel-
scape,pedicelandbasalpartoffirstflagellomere lowbandsatposteriormargin.Allsetosityonab-
lightertoyellowish.Flagellomeresquadratewith domen brownish black. Terminalia brown with
dark short setae, median flagellomere about 0.9 gonocoxiteslightlyyellowishapically.Tergite9
timesaslongasbroad,apicalflagellomereelon- tapering with shallow anterior incision. Gono-
gated, 2.25–2.75, 2.51 [2.25] times as long as coxitewithstrongmarginalbristlesbearinginter-
broadbasally,withclearlyoutlinedapicalpapilla. nal flange at ventromesal margin. Gonostylus
Thorax.Mesonotumdarkbrownwithyellow- bifid:basallobewithaggregationofstrongapical
ishhumeri;allsetaeblack.Scutellumbrown,ba- mesallydirectedbristles,apicallobealmostbare
sally somewhat yellowish, with marginal dark with2–3shortsetaemedially.
shortsetaenotarrangedtodistinctpairs.Lateral Female.Unknown.
parts of thorax bicoloured: antepronotum, ane- Biology.Unknown.
pisternum, aneprimeron and preepisternum 2 Etymology.ThenamereferstotheGeorgian
light brown; proepisternum, laterotergite and typelocality.
mediotergitedarkerbutlighterthanmesonotum.
Antepronotum, laterotergite and mediotergite
3.2.Orfeliatrifidasp.n.(Figs.1d,3a–d)
yellowishonupperpart;preepisternum2whitish
pale on lower part. Antepronotum and pro- Type material. Holotype. #, GEORGIA,
episternum with short dark setae, mediotergite Marelisi southeast of Surami, 41°57’03.6’’N
withdarksetaeonhindpart.Otherthoracicscler- 043°17’00.7’’E, 434 m a.s.l., sweeping 18.V.
itesbare.Halterpaleyellowwithdarkshortsetae 2012,O.Kurinaleg.[drymountedfromalcohol,
onstemandonanteriortwothirdofknob.Apex IZBE].
ofknobbare. Description.Male(n=1). Body length[5.4
Legs yellow with all setae blackish. Tarsal mm],winglength[4.62mm].
segmentsseemdarkerbecauseofdensesetae.Ra- Head.Blackishbrownwithdarksetae.Three
tiooffemurtotibiaforfore,midandhindlegs: ocelliinshallowtriangulararrangement,median
0.80–0.86, 0.82 [0.80]; 0.68–0.79, 0.72 [0.72]; ocellussmallerthanlaterals.Clypeusrectangular,
0.63–0.71,0.69[0.63].Ratiooftibiatobasitarsus dark brown, with dark setae on lower part.
for fore, mid and hind legs: 1.04–1.13, 1,08 Mouthparts yellow. Maxillary palpus yellow,
[1.04]; 1.17–1.25, 1.20 [1.17]; 1.20–1.27, 1.23 withdarksetae.Ratiosofthreeapicalpalpalseg-
[1.20]. ments 1.0:1.13:1.8, penultimate segment 2.8
Wing with yellowish tinge along anterior timesaslongaswide,lastsegment9timesaslong
margin and with preapical, gradually paler aswide.Antennadarkbrownwithbasalpartof
brownishbandfromtheapexofR5totheM2or first flagellomere yellowish. Flagellomeres
occasionally and very faintly to wing margin, quadratewithdarkshortsetae,medianflagello-
leaving the apex of wing hyaline. Veins light mereabout0.9timesaslongasbroad,apicalfla-
brown,withR1,R4,R5andCuA2darker,M2ba- gellomereelongated,1.9timesaslongasbroad
sallyobsolete.R5setoseonbothside,R1setose basally,withclearlyoutlinedapicalpapilla.
dorsally,CuA2with7–10dorsalsetaebeforeand Thorax. Mesonotum dark brown with setae
at level of bm-cu. Otherwise all veins bare. Sc dark. Scutellum brown, basally somewhat yel-
endsincostaclearlybeforebaseofRs.R40.19– lowish, with marginal dark short setae not ar-
ENTOMOL.FENNICAVol.24 (cid:127) TwonewOrfeliaspeciesfromGeorgia 25
Fig.3.Orfeliatrifida
sp.n.,maletermi-
nalia.–a.Ventral
view.–b.Lateral
view.–c.Dorsal
view,tergite9de-
tached.–d.Tergite
9.Scalebar=0.1
mm.
ranged to distinct pairs. Lateral parts of thorax margin and with preapical, gradually paler
brown, somewhat lighter than mesonotum. brownishbandfromtheapexofR5tothemiddle
Mediotergite yellowish on upper part. Antepro- ofmedialfork,leavingtheapexofwinghyaline.
notumandproepisternumwithshortdarksetae, Veins light brown, with R1, R4, R5 and CuA2
mediotergitewithdarksetaeonhindpart.Other darker, M2 basally obsolete. R5 setose on both
thoracic sclerites bare. Halter pale yellow with side, R1 setose dorsally, CuA2 with 5–6 dorsal
darkshortsetaeonstemandonanteriortwothird setaeatlevelofbm-cu.Otherwiseallveinsbare.
ofknob.Apexofknobbare. ScendsincostabeforebaseofRs.R40.2timesas
Legs yellow with all setae blackish. Tarsal longasR5.R4endsincosta0.3distancefromR1
segmentsseemdarkerbecauseofdensesetae.Ra- toR5.Costareaches0.2distancefromR5toM1.
tiooffemurtotibiaforfore,midandhindlegs: m-stem about as long as basal portion of R5.
0.86;0.75;0.73.Ratiooftibiatobasitarsusforfo- Branchesofmedialforkapicallyslightlyconver-
re,midandhindlegs:1.05;1.23;1.21. gent.Branchesofcubitalforkgraduallydivergent
Wing with yellowish tinge along anterior towardswingmargin.
26 Kurina&Jürgenstein (cid:127) ENTOMOL.FENNICAVol.24
Abdomen. Dorsoventrally compressed. First setoselobewithstrongapicalbristles.Bothnew
segmententirelybrownish,succeedingsegments species have, similar to O. angulata, marginal
with yellowish posterior bands which are more bristles bearing an internal flangeat theventro-
clearly outlined on tergites laterally and on apicalmarginofthegonocoxitemesally.Accord-
sternites. All setosity on abdomen brownish ingtoZaitzev’skey(1994),thenewspeciesrun
black.Tergite9taperingwithshallowanteriorin- tocouple4becauseofthemainlybrownthoracic
cision.Gonocoxitewithstrongmarginalbristles coloration and the elongated palpal segments.
bearing internal flange at ventromesal margin. However, in contrast to the species included in
Gonostylustrifid:basalandlaterallobeswithag- thiscouplet,bothnewspecieslackpointedout-
gregationofstrongapicalbristles,mediallobeal- growthsonthedorsoapicalmarginofthegono-
mostbarewith3–4shortsetaemedially. coxites.
Female.Unknown.
Biology.Unknown. Acknowledgements.Thestudywassupportedbythegrants
Etymology. The name is Latin – trifida, di- 9174and8583oftheEstonianScienceFoundationandby
targetfinancingprojectSF0170160s08.Wearegratefulto
videdintothreeorconsistingofthreeparts,refer-
Prof.T.Tammaru(Tartu,Estonia)fororganisingthecol-
ringtothetrifidshapeofgonostylusofmaleter-
lectingtriptoGeorgiainMay2012,toDr.G.Japoshvili
minalia:adjective. (Tbilisi,Georgia)forhelpduringthefieldworkinGeorgia
andtoDr.J.Kjærandsen(Lund,Sweden)forcommentson
thespecies.WethankDr.N.Evenhuis(BMH,Honolulu,
4.Discussion Hawaii)forreadingandcriticalperusalofthemanuscript.
The Palaearctic Orfelia species can be divided References
intotwogroupsbythecolorationofthemesono-
tum(entirelybrowntoblackishversusyellowto Bechev,D.N.2002:Orfeliagruevispec.nov.fromBulga-
ochrous, with or without dark longitudinal ria(Diptera:Sciaroidea:Keroplatidae).—ActaEnto-
stripes)andthestructureofthegonostylus(single mologicaSlovenica10:199–201.
Chandler,P.J.2001:Fungusgnats(Diptera:Sciaroidea)
versusbasallydivided)(cf.Zaitzev1994,Chan-
newtoBritain.—BritishJournalofEntomologyand
dleretal.2006).Bothnewspeciesbelongtothe
naturalHistory13:215–243.
grouphavingadarkbrownmesonotumandasin- Chandler,P.J.,Bechev,D.N.,&Caspers,N.2006:The
glegonostylusofthemaleterminalia,sharingthe fungusgnats(Diptera:Bolitophilidae,Diadocidiidae,
combinationofcharacterswiththreeotherPalae- Ditomyiidae, Keroplatidae and Mycetophilidae) of
Greece,itsislandsandCyprus.—StudiaDipterologi-
arcticspecies,viz.O.bezzii(Strobl,1910),O.bi-
ca12:255–314.
color(Macquart,1826)andO.nemoralis(Mei-
Evenhuis,N.L.1994:Catalogueofthefossilfliesofthe
gen,1818).Thefirsttwoofthesespecieshavethe world (Insecta: Diptera). — Backhuys Publishers,
gonostylus without lobes (cf. Chandler et al. Leiden.600pp.
2006:fig.19,Chandler2001:fig.6)whilethelat- Evenhuis,N.L.2006:CatalogoftheKeroplatidaeofthe
World(Insecta:Diptera).—BishopMuseumBulletin
terhasabasallyundividedsinglegonostylyswith
inEntomology13.Honolulu,BishopMuseumPress.
twolobes(cf.Hutsonetal.1980:fig.144,Zaitzev
178pp.
1994:fig.40-3).Bythestructureofthegonosty- Hutson,A.M.,Ackland,D.M.,&Kidd,L.N.1980:My-
lus,aJapanesespecies,O.angulata(Sasakawa, cetophilidae (Bolitophilinae, Ditomyiinae, Diadoci-
1994)havingotherwiseayellowmesonotum,re- diinae, Keroplatinae, Sciophilinae and Manotinae)
(Diptera,Nematocera).—HandbooksfortheIdentifi-
semblesO.nemoralis(cf.Sasakawa1994:fig.1).
cationofBritishInsects9,3.RoyalEntomologicalSo-
Orfeliageorgicasp.n.has,similarlytothesetwo
cietyofLondon.111pp.
species,abifidsinglegonostylus:thebasallobe Joost,W.&Plassmann,E.1976:Mycetophilidenausdem
bearsstrongapicalbristleswhiletheapicallobeis Zentralkaukasus(Diptera:Mycetophilidae).—Sen-
sclerotized and almost bare. In contrast, O. ckenbergianabiologica57:67–68.
nemoralisandO.angulatahavetheapicallobeof Joost,W.&Plassmann,E.1979:ZurPilzmücken-Fauna
im West-Kaukasus (Insecta: Diptera: Mycetophili-
gonostylussetoseandstockier.Orfeliatrifidasp.
dae). — Senckenbergiana biologica 59(1978):369–
n.hasatrifidgonostylusthatisuniquewithinthe
370.
genus Orfelia, including an additional lateral Joost, W. & Plassmann, E. 1985: Pilzmücken aus dem
ENTOMOL.FENNICAVol.24 (cid:127) TwonewOrfeliaspeciesfromGeorgia 27
Kaukasus-Gebiet(UdSSR)(Insecta,Diptera,Myce- Søli,G.E.E.1997:Onthemorphologyandphylogenyof
tophilidae).—FaunistischeAbhandlungen12:137– Mycetophilidae,witharevisionofCoelosiaWinnertz
139. (Diptera,Sciaroidea).—EntomologicaScandinavica
Joost,W.&Plassmann,E.1992:BeitragzurKenntniskau- Supplement50:1–139.
kasischerPilzmücken.(Insecta,Diptera:Mycetophili- Søli,G.E.E.,Vockeroth,R.J.&Matile,L.2000:A.4.Fa-
dae).—FaunistischeAbhandlungen18:209–211. milies of Sciaroidea. — In: Papp, L. & Darvas, B.
Kurina,O.2003:NotesonthePalaearcticspeciesofthe (eds.),ContributiontoaManualofPalaearcticDipte-
genusPolyleptaWinnertz(Diptera:Mycetophilidae) ra.Appendix:49–92.ScienceHerald.Budapest.604
withanewsynonymizaton.—EntomologicaFennica pp.
14:91–97. Vockeroth,J.R.1966:Amethodofmountinginsectsfrom
Kurina, O. 2008: Cluzobra matilei sp. n. from French alcohol.—TheCanadianEntomologist98:69–70.
Guyana,withnotesoncongeners(Diptera:Myceto- Zaitzev,A.I.1994:FungusgnatsofthefaunaofRussia
philidae).—Zootaxa1874:63–68. andadjacentregions.Part1.Moscow.288pp.[InRus-
Sasakawa,M.1994:Fungusgnatsassociatedwithflowers sian.]
ofthegenusArisaema(Araceae).Part2.Keroplatidae Zaitzev,A.I.,&Menzel,F.1996:Newdataonthefungus
andMycetophilidae(Diptera).—Transactionsofthe gnatsfromtheRussianFarEast(Diptera:Sciaroidea).
ShikokuEntomologicalSociety20:293–306. —BeiträgezurEntomologie46:159–167.