Naarda furcatella, Tóth & Ronkay, 2015

Tóth, Balázs & Ronkay, László, 2015, Revision Of The Palaearctic And Oriental Species Of The Genus Naarda (Lepidoptera: Erebidae, Hypeninae) Part 2. Description Of Ten New Species From Asia, Acta Zoologica Academiae Scientiarum Hungaricae 61 (1), pp. 3-23 : 17-18

Naarda furcatella sp. n.

( Figs 6 , 18 , 32, 35)

Holotype. m, Thailand: KanchannaburibyRiverKwaiResotel, 19–22.VII.2003, leg. M. Fibiger; slide No. TB 447m (coll. MF, ZMUC).

Paratypes. Thailand: 3 m, 2 f, withthesamedataastheholotype; slideNosTB 419m, TB422f, TB659f, TB675f (coll. MF, ZMUC and HNHM); 1 f, Prov. Chiang Mai , 500 m, Mae Suai, CharinGardenResort, 99°35’E, 19°47’N, 2.XI.2002, leg. B. Herczig & G. Ronkay; slide No. TB 682f (coll. HNHM) .

Indonesia: 4 f, West- Sumatra, Bukittinggi , 980 m 00°15’30S / 100°21’13E 19.-23. II.2002. leg. M. Fibiger & K. Larsen; slide Nos TB 415f, TB650f, TB680f (coll. MF, ZMUC) ; 1 f, West- Sumatra, BatangPalupuh , 880 m, 7 km. N. Bukittinggi, 00°14’34S / 100°09’13E; 21.II.2002; leg. M. Fibiger & K. Larsen (coll. MF, ZMUC) ; 1 f, North- Sumatra, HutuPadang (Asahan), RiverSilau, 48 kmSEP. Siantar , NearSialangoman , 220 m, 13.II.2002. leg. M. Fibiger & K. Larsen; slide No. TB 417f (coll. MF, ZMUC) .

Cambodia: 1 f, Mondolkiriprov.; SeimaBiodiversityConservationArea, road Seima–O’Rang ; 12°15’44”N 107°03’49”E, 360 m; No. 88, 27-29.I.2006, atlight; leg. G. Csorba & G. Ronkay; slideNo. TB798f (coll. HNHM) .

Taxonomy. Thisspeciesisverysimilarexternallyto N. atrata , butthemale genitaliashowconspicuoussimilaritiestocertainundescribedAfricanspecies.

Description. Wingspan 10.5–12 mm, lengthofforewing 5–6 mm. Thisisoneofthe smallest Naarda species. Antennaefiliform, ciliatewithsetae. Ciliationuniquely (slightly) moredenseinfemalethaninmale. Lengthofcilia 1.5 timesthediameterofflagellumin male, halfthediameterinfemale. Setaealsolongerinmale; 2.5 timeslongerthandiameter offlagellum, infemaleonly 1.5 timeslonger. Labialpalpsfourtimesdiameterofeyesin male, nearly 2.5 timesinfemale; 3rdsegmentsmall, itstiplight; 2ndsegmentbroad, dorsal scaleslong, theirdorsaledgeconvex, inmalenearlydomed. Scale-hoodofvertexnarrowbasedandrelativelylonginmale, broad-basedandshortinfemale. Characteristicwing patternfeatures: patternandgroundcoloursimilarinbothsexes (butthefemalespecimens areworn); forewingcostanotconcaveinmale; groundcolourdarkgrey; subterminalline hardlyvisible, sinuouswithsmall, equalstreaksdirectedinwards; postmediallinedarker thangroundcolour, moresinuousthansubterminalline, stronglyangledinwardsbelow cell; antemedialandmediallinesalsopresent. Reniformstigmaflask- orpear-shaped, brightyellow, bottomthirdwithbig, blackishdot, darkedgeofreniformfragmentedinto shortsections; orbicularstigmawell- marked, asyellowasreniformstigmaandfullyencircledwithdarkline. Groundcolourofhindwinglikethatofforewinginfemale, palerin male; tracesoffasciaepresentatinnermarginonly.

Malegenitalia ( Fig. 6 ). Uncusrelativelylong, slightlydilatedtowardsapex, itstip abruptlypointedtoahook- likestructure. Scaphiumaslongasuncus, slightlysinuous. Vinculumaslongastegumen. Saccusnarrow-basedbutlong, slightlytapering, itstip rounded. Juxtarounded. Valvarelativelyshort, edgesofmedialhalfparallel, basalpartrelativelybroad; costalprocesslarge, biggestinthislineage, broadlytriangularwithpointed andslightlydistallycurvedtip. Apicalfusedstructureaswideascostalprocess, verylong (1/3rdofthewholevalvallength), slightlytapering, itstipslightlycurvedupwards. Sacculusverybroadatbase, apicallytapering. Aedeagusthick, straight, withwell- developed carinalprocess. Vesica (partiallyeverted) withtwo, strongandcurvedcornuti, butwithout scobination.

Femalegenitalia ( Fig. 18 ). Ovipositorlobesrounded. Apophysesthick, especially apophysesanteriores. Apophysesposteriores 1.6 timeslongerthanapophysesanteriores. LobesofsternumA7 long, rounded. Sinuslong, itsbaseextremelynarrow, slightlydilated distally. Posteriorendofductusbursaebroad, butgraduallytaperingtowardscorpusbursae. Colliculumwelldeveloped, sclerotised, funnel- shaped, coveringposteriortwo- thirds ofductusbursae. Corpusbursaeglobular, withseveralwide, curved, denselyscobinate bands; anteriorlywithbroad, verylong, slightlycurvedcervixbursaebeingtwiceaslong asrestofthecorpusbursae.

Diagnosis. Themalegenitaliaofthisnewspeciesaresomewhatsimilar to those of N. glauculalis , but the uncus is narrower in N. furcatella than in N. glauculalis , thesaccusismuchlonger, thedistalfusedstructureofthevalva islongerandprocess- like, theaedeagusislesscurved, thevesicaisarmedby twostrongcornuti, andastrikinglylongcostalprocessispresentinthevalva.

Thefemalegenitaliaof N. furcatella arereminiscenttothoseof N. ineffectalis sensuHolloway ( Figs 20–21 ), butinthenewspeciesthesternumA7 is longer, thecorpusbursaeislesselongate, globular, andmorescobinatethan in N. ineffectalis .

Etymology. Thespeciesnamewasinspiredbythebifurcatevalvaofthemalegenitalia.

Distribution. ThisspeciesisfoundinthecentralpartofThailand, inCambodiaand onSumatraIsland.

Figures

Figs 1–6. Male genitalia of newly described Naarda species: 1 = N. octogesima sp. n. (RL7903m), 2 = N. laoana sp. n. (TB554m), 3 = N. mirabilis sp. n. (RL7920m), 4 = N. vicina sp. n. (clasping app.: RL7988m; aedeagus: RL7989m), 5 = N. atrata sp. n. (TB392m), 6 = N. furcatella sp. n. (clasping app.: TB447m; aedeagus: TB419m).

Figs 13–18. Female genitalia of newly described species: 13 = N. octogesima sp. n. (TB399f), 14 = N. laoana sp. n. (TB556f), 15 = N. vicina sp. n. (RL8000f), 16 = N. atrata sp. n. (TB448f), 17 = N. plumbea sp. n. (RL7917f), 18 = N. furcatella sp. n. (TB422f).

Figs 19–24. Female genitalia of newly and formerly described species: 19 = N. palawana sp. n. (RL8003f), 20 = N. ineffectalis sensu Holloway (RL10784f), 21 = N. ineffectalis sensu Hol- loway (RL7689f), 22 = N. notata Hampson (RL7690f), 23 = N. bisignata Walker (OUMNH 433-1964), 24 = N. barlowi Holloway (TB437f).