Odonalologica35(3):281-287 SeptemberI,2006 Thelarvaeof Teinopodagriondecipiens DeMarmels and T. meridionale De Marmels (Zygoptera: Megapodagrionidae) N.Von Ellenrieder IBIGEO, MuseodeCiencias Naturales deSalta,Universidad Nacional deSalta, Mendoza2,AR-4400Salta,Argentina [email protected] Received January11,2006 /ReviewedandAcceptedFebruary6,2006 Thelarvaeof2spp.aredescribed andillustrated: T.decipiens,based onspecimens fromthe Bolivian Yungas,and T.meridionale,based onspecimens fromtheArgen- tineYungas.Akey toallknown larvaeisprovided. INTRODUCTION Teinopodagrion DeMarmels,2001 isanendemicgenusfromtheSouthAmeri- can Yungas mountaincloudforest, extending from Venezuelato northwestern Argentina alongtheeastern slopeoftheAndes. Itcomprises 24species, andthe larvae ofonly twoofthemhavebeen described(DE MARMELS, 1982;2001): T.oscillans(Selys, 1862)and T. venale(Selys, 1862). In this paperthe larvae of two further species are describedand illustrated: Teinopodagrion decipiens De Marmels, 2001 and T. meridionaleDe Marmels, 2001. TEINOPODAGRION DECIPIENS DE MARMELS Figures2,4-5,7,9, 11,13,16-17,20-21,23,25-26 Material.- BOLIVIA:NorYungasprovince,Coroico,streamofclearwatersandstonybed, larvaefoundamongstvegetaldetritus,1$ (emergedinlaboratory),3d (lastlarvalinstar), 13-1-2000 (1930m.a.s.l.), 16°12’40”S,67°42T3”W,vonEllenrieder leg. —All specimensdepositedinthe Mu- seodeCiencias Naturales deSalta. 282 N.vonEllenrieder description. -Head: trapezoidal, about 1.75timesas wide as long, with posterior margin concave,bearing ablunttubercleoneach sideofocciput(Figs 2,5).Antenna6-segmented, withfirstantennomere thelongest(Fig. 4).Premen- tum(Fig. 7)0.63-0.76timesas wideas long, dorsalandventralsurfacesbare,ex- ceptfor afewlateralthin longsetae; ligulaconvex, finely crenulatedalongmar- gin. Labialpalp withthreeteeth, the medialone longest, innertoothbluntand outerandmedialteethtriangular(Fig. 7).Articulationofpre-andpostmentum midway between bases of coxa I andII. Mandibles(Figs 10-11)with following formula(sensu WATSON, 1956):L 1T2340 a (m1234)b,R 1T234ya(m°)b. Figs 1-2.Generalaspect oflastlarvalinstar,dorsalview: (1)Teinopodagrionmeridionale De Marmels, d;-(2)T. decipiensDeMarmels,9. —[Scale: 2mm] Teinopodagrionlarvae 283 Thorax.-Pronotumquadrangular,withlateralanglesprojected intoablunt tubercle on each side (Fig. 5).Wing pads almost reaching the end of abdomi- nal segment5.Legs long; femorawiththreedarkbands; tibiaeandtarsi lacking darkbands. Abdomen.- Unpatterned,withdorsalhookspresentonsegments 1-9;those on 1-5 small,increasing insize from6 to9 (Fig. 13). Cerci elongated and blunt (Figs. 16-17,20-21).Gonapophyses ofmaletriangular anddenticulate, offemale reaching distalend ofsegment10andouteroneswithdenticulatemargins (Fig. 23). Caudallamellaewithtwo transverse darkbands(Figs 25-26; in two males also thetips dark)anddenticulatemargins, aboutas long as0.72-0.79timesthe abdomenlength; dorsallamellafoliaceouswithalatero-longitudinal carina on eachside, laterallamellaetriquetal. Figs3-11. Last larval instar,Figs 3,6,8, 10: T.meridionale;Figs4-5,7, 9, 11:T.decipiens;-(3,4) right antenna,dorsal view;- (5),head andprothorax, lateralview;- (6,7)prementum,dorsal view; - (8, 10)right mandible,inner view;- (9, 11)leftmandible,innerview. - [Scales:Figs3-7; 1 mm; Figs 8-11:2mm] 284 N.vonEllenrieder Measurements (inmm;femalesN= 1,males N =3). Totallengthwithoutcaudallamel- lae,female: 17,males: 16.6-19. Prementumlength,female:3,males:2.7-3.2;preraentummax.width, female: 1.9,males:2.05;FemurI,female: 4.3,males: 4.1-4.6;II,female: 5.4,males:5.5-6;III,female: 6.9,males:6.5-7.1.Innerwingpads, female:5.8,males:5.7-6.2;externalwingpads, female:5.3,males: 5.5-5.75. Abdomenlengthwithoutcaudallamellae,female:9.75,males:9.5-12;dorsalcaudallamella, female: 6.6,males:6-6.4;lateral caudallamellae,female: 6.9,males: 7.5-9.3. YOUNGERINSTARS. — One femalespecimen, whichdiffersfromthelastinstar as follows:Headwithapairofblunttuberclesonvertexbetweencompound eyes; tuberclesonabdominalsegments 1-9allprominentandupright; tibiaewithtwo basal darkbands; caudal lamellaewithdarkapices. TEINOPODAGRION MERIDIONALEDE MARMELS Figures1,3,6,8, 10, 12,14-15,18-19,22,24 Material.- ARGENTINA:Salta province.Lesser,(1312m.a.s.L), 24°40’57”S,65°28’39”W stream ofclear waterand stonybed,larvaefound amongstmassesofanaquaticmacrophyte,von Ellenrieder leg.,I 2 (emergedinlaboratory),13-X-2005; 1 9 (emergedin laboratory),12-XI-2005; 1 S, 3 9(lastlarval instar), 13-X-2005; 16 (lastlarval instar),23-IX-2005; 1 c? (lastlarval instar), 10-XI-2005; 16 (lastlarvalinstar),12-XI-2005;— ARGENTINA:Salta province,BarituNational Park,stonystream affluenttoBaritu River,22°29’57”S,64°45’29”W,(1215m.a.s.1.), 2 S (lastlarval instar), 19/20-V1II-2005,von Ellenrieder leg. — All specimensdepositedin theMuseo deCiencias Naturales deSalta. DESCRIPTION.-Head; trapezoidal, about 1.55timesas wide as long, with posterior margin concave,bearing ablunttubercleoneachsideofocciput (Fig. 1).Antenna6-segmented, withfirstantennomere thelongest(Fig. 3).Prementum (Fig. 6)0.68-0.79timesas wideas long, dorsalandventralsurfaces bare, except forafew lateralthin long setae; ligula convex, finely crenulatedalong margin. Labialpalpwiththreeteeth, themedialonelongest, innertoothbluntandouter andmedialteethpointed (Fig. 6).Articulationofpre-andpostmentummidway betweenbasesofcoxaIandII.Mandibles(Figs 8-9) withfollowing formula(sen- suWATSON, 1956):L V12340a(m1234)b,R IT234y a(m°)b. Thorax.-Pronotumquadrangular,withlateralanglesprojectedintoablunt tubercleoneachside(Fig. 1).Wing pads almostreaching theend ofabdominal segment 5,witha darkbasalanda darkmedialspot(Fig. 1).Legs long; femora with threedark bands; tibiaewith darkapexesand twobasal darkspots; tarsi dark. Abdomen.- With twodarklatero-longitudinalstripes asinFig. 1,withdor- sal hookspresentonsegments 1-9;thoseon2-5 minute, increasing insize from6 to9 (Fig. 12). Cerci taperingto end(Figs 14-15, 18-19). Gonapophyses ofmale triangular and denticulate, of femalesurpassing distalend of segment 10 and outer oneswithdenticulatemargins (Fig. 22). Caudallamellaedarkwithbasal, medialandsub-apical pale bandson mediallamella,andbasal, medialandsub- apical pale outer spots on laterallamellae(Fig. 24), margins finely denticulate; Teinopodagrionlarvae 285 aboutas long as 1.04-1.64times theabdomenlength; dorsal lamellafoliaceous withalatero-longitudinal carinaoneachside, laterallamellaetriquetal. Measurements (innun;femalesN =4,malesN=5).- Totallengthwithoutcaudallamel- lae,females: 12.3-15.4,males; 11-18.Prementumlength,females: 2.4-2.7,males:2.S-2.7;prementum max.width, females: 1.7-1.9,males: 1.8-1.9;Femur I, females and males: 4-4.6;II, females: 5.4-6, males:5.4-6.1;III,females: 6.4-7.2,males: 6.2-7.2.Innerwingpads,females: 5.1-5.9,males:5,2-6;ex- ternalwingpads, females:4.9-S.6,males: 5-5.6. Abdomen lengthwithoutcaudallamellae,females: 6.2-S.6,males:6.5-10.8;dorsal caudallamella: females,7.5-9,males:7.7-10.6;lateral caudallamel- lae,females: 9.6-11,males:9.4-11.5. Figs 12-26.Lastlarvalinstar.Figs12,14-15,18-19,22,24: T.meridionale;Figs 13,16-17,20-21,23, 25-26:T.decipiens;- (12,13)abdomen,lateralview;- (14,16)femalecercus, lateralview;(18,20)male cercus,lateralview;- (15,17)femalecercus, dorsalview;(19,21)male cercus,dorsal view;- (22,23) ovipositor, lateralview;- (24)caudallamella,dorsalview;- (25)dorsal caudallamella,lateralview; - (26)medial caudal lamella,lateral view, — [Scales: 1mm] 286 N.vonEllenrieder YOUNGERINSTARS(samelocalities; Lesser, 1 9,9-IX-05;43 5 9 13-X-05;2 , , 3, 1 9, 12-XI-05;Baritu, 12 3,5 9, 19/20-VIII-05)dilTerfromthelastinstaras follows: Headwithapair of blunttuberclesonvertex betweencompound eyes; tubercles onabdominalsegmentsincreasing inlengthcaudally, 2-6not minute. KEY TO KNOWN LAST LARVAL INSTARSOF TEINOPODAGRION I Caudallamellae longerthanabdomen(ratioof1.04-1,64,Fig. 1);malecercustaperingtoend(Figs 18-19) 2 —Caudal lamellae shorterthan abdomen (ratioof0.72-0.79,Fig. 2); male cercuscylindrical (Figs 20-21) 3 2(1)Tibiae unpatterned(asinFig.2);wingcasesextendingtobeginning,orslightlydistaltobegin- ning,ofS5;dorsal hooks onS5-9;Venezuela andColombia venale —Tibiaewith twobasal dark spots anddark apex(Fig. 1);wingcasesextendingtoend ofS5(Fig. 1);dorsal hooksonSI-9,thoseon2-5minute(Fig. 12);Bolivia andArgentina meridionals 3 (2)LabiumextendingbeyondcoxaeII;wingcasesextendingtoendofS6;tibiae unpatterned(as in Fig.2);abdomen with dark longitudinalmarks anddorsal hooksonS5-9;Venezuela and Co- lombia oscillans — LabiumextendingtobetweencoxaeI andII(Fig.5);wingcasesextendingto endofS5 (Fig,2); tibiaewith onebasal darkband (Fig.2); abdomen paleand withdorsal hooks onSI-9,those on 2-5minute(Fig. 13);PeruandBolivia decipiens DISCUSSION Teinopodagrion decipiens extends fromPeruto SantaCruz departmentin Bo- livia,and T.meridionalefromSantaCruz department inBolivia to NW Argen- tina(DE MARMELS,2001).Theirlarvaecanbeeasilydifferentiatedfromeach otherby colorpattern(abdomen andtibiaeunmarkedin T. decipiens, withdark marks in T. meridionale) andratioofthecaudallamellaetotheabdomen(short- erthanabdomenin T. decipiens, longerin T. meridionale). Theothertwo species fromwhich larvaeareknown, T. oscillansandT. venale,occur inVenezuelaand Colombia, andcan be distinguished bythecharactersmentionedinthe key. Thegeneric charactersproposed by DE MARMELS(2001) forlarvaeof Tei- nopodagrionare hereinconfirmed,andcanbecomplemented asfollows:antennae 6-segmented; headwitha pair oftuberclesbehindtheeyes; prementumslightly constrictedatbasalthird;labialpalpwiththreeteeth,themedialonethelongest; mandibularformulaL 1T2340a(m1234)b, R 1T234y a(m°) b;pronotumwith projectinglateralangles; abdominalsegmentswithdorsalhooks; caudallamellae lanceolate, themedialonefoliaceouswitha medio-longitudinal carina oneach side, widerandshorterthanthetriquetal laterallamellae. Teinopodagrionlarvae 287 ACKNOWLEDGEMENTS Ithank Drs JURGDE MARMELS and ROSSER W.GARRISON forthecritical readingof themanuscript.This studywassupportedbytheConsejoNacional deInvestigacionesCientificas y TecnicasdeArgentina(CONICET). REFERENCES DE MARMELS,J., 1982. Dosnayadesnuevasdela familia Megapodagrionidae(OdonataZygo- ptera).BolnEnt. venez.(N.S.)2(10):89-93. DEMARMELS,J.,2001, RevisionofMegapodagrionSelys, 1886 (Insecta,Odonata: Megapodagrio- nidae).Diss.,Univ. Zurich. WATSON,M.C., 1956. Theutilization ofmandibular armatureintaxonomicstudies ofanisopter- ousnymphs.Trans. Am. ent. Soa 81: 155-205.