Coeliccia sasamotoisp. nov. from Vietnam and Laos (Odonata: Platycnemididae)

2011·0.14 MB·

by  Do Manh Cuong

InternationalJournalofOdonatology
Vol.14,No.3,September2011,193–197
Coeliccia sasamotoi sp. nov. fromVietnam and Laos
(Odonata: Platycnemididae)
DoManhCuong*
409–57A,TaptheBoThuysan,20/22NguyenCongHoan,Hanoi,Vietnam
(Received13July2009;finalversionreceived14June2011)
Coelicciasasamotoisp.nov.isdescribedbasedonspecimensofbothsexescollectedfromcentralVietnam
andLaos.Itdiffersfromrelatedspeciesindetailsofcoloration,theshapeofthemaleterminalia,andthe
shapeoftheposteriorlobeofthefemalepronotum.
Keywords: Zygoptera;Platycnemididae;Coelicciasasamotoi;newspecies;Vietnam;Laos
Introduction
The genus Coeliccia Kirby, 1890 contains c.60 species and is distributed from India to Japan,
occurringasfarsouthasJava.Thetypicalhabitatofthegenusisforeststreams.Thelastreview
of the entire genus was made nearly 80 years ago (Laidlaw 1932); since then the number of
describedspecieshasmorethandoubled.ThenumberofspeciesofCoelicciaknownfromVietnam
hasincreasedinrecentyearswiththediscoveryofanumberofhithertounknownspecies(e.g.
Asahina 1997, Do 2007), many of which remain undescribed. The named species known to
occurinVietnamareC.accoAsahina1997,C.chromothorax(Selys,1891),C.cyanomelasRis,
1912, C. hoangliensis Do, 2007, C. montana Fraser, 1933, C. onoiAsahina, 1997, C. poungyi
Fraser,1924,C.pyriformis Laidlaw,1932,C.satoiAsahina,1997,C.scutellum Laidlaw,1932
(C.tomukuniiAsahina,1997isconsideredheretobeajuniorsynonymofC.scutellum),C.ueoni
Asahina,1997,andC.mingxiengisXu,2006(anewrecordfortheVietnamesefauna,fromTam
Dao National Park,Vinh Phuc Province by Do in 2009). The species C. yamashakii, recorded
byDo(2007),isC.scutellum andnowisknownfromPhuQuocIsland,KienGiangProvince,
Vietnam.
On a field trip to Huong Son, Ha Tinh Province, centralVietnam in 2004, I collected three
male specimens of an unnamed species of Coeliccia in a limestone forest area. Later, as I was
studyingthesespecimens,MrAkihikoSasamotoinformedmeofsimilarspecimenshehadcol-
lected in Laos.After comparing the specimens fromVietnam and Laos, I determined that they
*Email:[email protected]
ISSN1388-7890print/ISSN2159-6719online
©2011WorldwideDragonflyAssociation
http://dx.doi.org/10.1080/13887890.2011.607078
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194 M.C.Do
belongtothesamespecies,describedhereasC.sasamotoisp.nov.Terminologyforwingvena-
tion used here follows that in Rehn (2003), which was derived from Riek and Kukalová-Peck
(1984).
Coelicciasasamotoisp.nov.
(Figures1–2)
Specimensexamined
Holotype(cid:2)RaoMac,HuongSon,HaTinhProv.,CentralVietnam,3May2004,leg.M.C.Do.
Paratypes:2(cid:2),dataasholotype;2(cid:2),1(cid:3),LakSao,BolikhamayProv.,KaewNeuaPassarea,
centraleastLaos,11July2005,leg.A.Sasamoto;6(cid:2),4(cid:3),samelocalityandcollector,12July
2005.TheholotypewillbedepositedintheVietnamNationalMuseumofNature.
Etymology
Named for MrAkihiko Sasamoto, a Japanese odonatologist, who independently collected the
paratypesfromLaosandwhopointedoutthattheyrepresentedanewspecies.
Figure 1. Coelicciasasamotoisp.nov.♂:(a)head,obliqueview;(b)thorax,lateralview;(c)analappendages,lateral
view;(d)analappendages,dorsalview;(e)analappendages,dview;(f)penis;(g)forewing;(h)hindwing.
Coelicciasasamotoisp.nov. 195
Figure 2. Coelicciasasamotoisp.nov.♀:(a)head,obliqueview;(b)thorax,lateralview;(c)prothorax,obliqueview;
(d)terminalabdominalsegmentsandovipositor,lateralview.
Descriptionofholotypemale
Head. Labium largely brownish white, end hooks of the labial palps shining black. Labrum,
clypeusandfronsdeepblack,withbroadbluebandanteriorlyonfronsabovetheclypeus,nar-
rowingcentrally(Figure1a).Mandiblebasesskybluewithblackmargin.Genaeskyblue.Vertex
and postfrons matte black, with small bean-shape blue spot running from each lateral ocellus
towards,butnotquitereaching,antenna,andapairofbluetransverselyorientedtear-dropshaped
postocularspots(Figure1a).
Thorax. Prothoraxblackwithlargelateralbluemarkingoccupyingmuchofpropleuronandparts
ofanteriorandmiddlepronotallobes(Figure 1b),withirregularblackstripealongnotopleural
suture.Synthoraxblackwithbluemarkings.Apairofmarkingsoneachsideofmesepisternum
(Figure 1b); a small upper mark and much larger lower mark covering almost half the lower
partofmesepisternum.Mesepimeronlargelyblack.Mesinfraepisternumblackexceptsmallarea
above middle coxa. Metepimeron mostly occupied by large bluish marking of irregular shape
(Figure 1b). Metepimeron largely bluish, meteinfraepisternum black above, pale below. Legs
cream yellowish, with blackish extensor and flexor surfaces on femur and tibia; apices of tibia
and tarsus wholly black; the tarsal claws dark, unequally bifid. Wings (Figure 1g–h) hyaline
withbrownishpterostigmacovering11 −11 cells.RP3arisingslightlyproximaltosubnodusin
5 4
bothwings,IR2arisingatsubnodusinFw,slightlydistaltoitinHw.Discoidalcelltrapezoidal
withbasalandcostaledgesshorterinbothwings.Fwwith20PxandHwwith19Px.RP2arising
proximally at about 8th–9th postnodal cross vein from base of wing. IR1 arising proximally at
11th–12thpostnodalcrossveinfrombaseofwing.Threepostdiscoidalcellstolevelofsubnodus
inbothforeandhindwings.Arculusataboutsecondantenodalcrossveinfrombaseofwing.
Abdomen. Slender,blackwithyellowandbluishmarkings.S1withbroadpalebluespotlater-
ally,taperingtowarddorsum.S2withventrolateralpalebluestripe,neitherendofwhichreaches
correspondingintersegmentalzone.S3withbasalblueannulus,interrupteddorsally,andapico-
lateral yellowish blue marking, gradually tapering forward. S4–S7 with apical spots similar to
that of S3. S7–S9 wholly black. S10 black, gently depressed on the dorso-apical border, with
faint apical dorsolateral dark yellow markings (Figure 1d–e). Sternites of S1–S6 dark yellow,
becominggraduallyblackerapicallyonS7–S9.
Anal appendages. Superior appendages goldenrod yellow, about 11 times length of S10. In
5
lateral view, thick and club shaped, slightly widening apically, with ventral subapical tooth at
196 M.C.Do
c.2/3 of their length (Figure 1c). In dorsal view, broad and roughly oblong, widening apically,
roundedattips,withinnermarginsinuous(Figure1d).Inferiorappendagesofsimilarcolourto
superiorappendages,withsmallblacktoothatapex,oftypicalshapeforthegenusandslightly
longerthanthesuperiors(Figure1c,e).
Penis. (genital ligula; Figure 1f). 1st segment robust, without setae on sclerotized shaft; 2nd
segmentexpandedlaterally;3rdsegmentfan-shaped,withpairofcentrallyplacedapicalflagella
arisingfromacommonorigin.
Measurements(mm). Hw27.5;abdomen(excl.appendages)45.0;superiorappendagesc.1.0
Female
Asinmaleexceptgenerallymorerobustandasnotedbelow.
Head. Sky-bluemarkingsofmalereplacedwithbluishyellow;markingsoriginatingfromlateral
ocelli more extensive, forming irregular transverse stripe extending to compound eye margin
(Figure2a).
Thorax. Prothorax(Figure2b,c)mostlyyellowexceptforextensiveblackareaontheanterior
lobe,narrowlyseparatedfromposteriorandcentralblackareaonmedianlobe,entireposterior
lobe black. Posterior lobe consisting of broad raised median part with rounded top and pair of
small dog-ear shaped lateral parts. Synthorax (Figure 2b) black with bluish-yellow markings.
Overallmarkedsimilarlytomale,butlowermarkingonmesepisternumslender,halfaswideas
mesepisternum;uppermarkalmostasinmale.Palemarkingonmetepisternummoreextensive
thaninmale.Wingswithvenationsimilartomale.InFw17–19Px,and17–18PxinHw.
Abdomen. Blackwithyellowmarkings;patternverysimilartomale,withbluemarkingsreplaced
by yellow. Each marking a little broader than corresponding marking in male. S8 black with
apical dark yellow lateral marking (Figure 2d), sternite of same colour. S9 black with uneven
dark yellow spot dorsolaterally on each side in apical half. S10 and appendages mostly black.
Ovipositor(Figure2d)blackwithyellowbasallyandapically,reachingalittlebeyondcerci.
Measurements(mm). Hw25.3–25.8;abdomen(excl.ovipositor)41.0.
Variationinmaleparatypes
Thereislittlevariationamongmaleparatypesexceptsomewingvenationcharacteristics:Pxof
forewing20–21,Pxofforewing18–19.
Measurements(mm). Hw27–27.5;abdomen(excl.appendages)44.5–45.7;superiorappendages
1–1.1.
Habitat
Foundinpristineforestonlimestonemountainsatabout400–600m.
Coelicciasasamotoisp.nov. 197
Diagnosisanddiscussion
Males of C. sasamotoi bear a superficial resemblance to those of C. didyma because of the
similar marking on the synthorax. However, the lower mesepisternal marking of C. sasamotoi
is much broader than that of C. didyma, and the latter species has much more extensive pale
markings on the terminal abdominal segments; moreover the two species are easily told apart
by the structure of the anal appendages. The club-like (in lateral view) superior appendage of
C.sasamotoiisdistinctiveandservestoseparatethemaleeasilyfrommostotherregionalspecies.
Ofspecieswiththesuperiorappendageofsimilarshapeinlateralview,thatofC.hoangliensis
ismuchshorter,thatofC.poungyihastheprominentventraltoothplacedataroundmid-length,
and C. chromothorax and C. scutellum are easily separated from C. sasamotoi by their bright
yelloworgreenish-yellow,undividedmesepisternalmarkingsandmoreextensivepalemarkings
on S9–S10. The enigmatic C. pyriformis, known only from the type from Tonkin, is said to
havesuperiorappendages“ratherclub-shaped”butwithouta“markedprojection”andwiththe
inferiors“muchlonger”(Laidlaw1932),andalsodiffersinmanydetailsofcoloration.Theranges
ofC.chromothoraxandC.scutellumoverlapthatofC.sasamotoi.Amongstregionalspeciesthe
penisofC.sasamotoiappearstobemostsimilartothatofC.chromothoraxandC.hoangliensis,
withtwolongterminalflagellaarisingfromacommonorigin;thepenisofC.scutellumapparently
has never been figured. It is likely that C. chromothorax, C. hoangliensis, C. sasamotoi and
C.scutellumarecloselyrelated.
The female of C. sasamotoi differs from all other named species known fromVietnam and
Laosinthestructureoftheposteriorpronotallobe,inhavingdividedmesepisternalmarkingsand
otherdetailsofcoloration.
Acknowledgements
IamsincerelythankfultoMrAkihikoSasamoto,whonotonlykindlypassedmethespecimensfromLaostodothe
description,butalsohashelpedmemanytimesformyresearchinVietnamesedragonflies.IalsothankRoryDowand
MikeMaywhohelpedmeincompletingandrevisingthemanuscript.
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