Teulisna kishidai Huang, Volynkin & Müller, 2024

Huang, Si-Yao, Volynkin, Anton V. & Müller, Günter C., 2024, Two new species of the genus Teulisna Walker (Lepidoptera, Erebidae, Arctiinae Lithosiini) from Myanmar and Nepal, Zootaxa 5506 (4), pp. 577-586 : 578-579

Teulisna kishidai Huang, Volynkin & Müller , sp. n.

urn:lsid:zoobank.org:act:83BA1B37-7933-4D89-9736-04FCBDC6FE6C

( Figs 1, 2 , 9, 10 , 15 )

Type material. Holotype ( Figs 1 , 9 ): male, “ MYANMAR ( WEST) | Chin State, Mt. Victoria | (Na Ma Toung) National park | Mindat town guesthouse | 21°22.315’ N, 93°58.601’E | 1453 m, 21. V. 2012 | leg. S. Löffler & S. Naumann ” / handwritten label “[Slide No.] GML06 ” ( ZSM, ex CGM) . Paratypes: 2 males, 7 females, Myanmar, Chin State, Mt. Victoria (Na Ma Toung) NP, Chin Hills , Mindat City , Kall Nue , 21°22.314’N 93°58.611’E, 1457m, 13.VIII.2007, P. Spona, Th. Ihle & S. Löffler leg., slide Nos.: GML07 (male) and GML08 (female) ( CGM) ; 1 male, Myanmar, Chin State, Kanpetlet , 1700m, 19.VII.2014, T . Tanaka leg. ( CHSY).

Diagnosis. Superficially T. kishidai sp. n. is quite unique and can be easily distinguished from all the congeners by its sexually dimorphic hindwing, which is broad, orange with a medially angled margin in the male and more pointed, pale yellow with a smooth margin in the female. The male genital capsule of T. kishidai sp. n. is reminiscent of the members of the T. pallida species-group ( Figs 3–8 , 11–14 , 16–18 , also see Volynkin (2023a)) having a small vincular coremata and the reduced intravincular sclerotisations, but differs clearly from the congeners in its smaller valvula, much longer and broader lamella centralis and the much larger and blade-like distal saccular process (smaller and distally bilobate in all members of the T. pallida species-group). In the phallus configuration, T. kishidai sp. n. can be distinguished from its congeners by the longer and tubular vesica (sack-like in all members of the T. pallida species-group), presence of an additional cornutus at the distal end of the proximal dorsal diverticulum and the much longer and broader distal section of the vesica. In the female genitalia, T. kishidai sp. n. is distinguished from its congeners by its much longer and broader corpus bursae.

Description. Male. Length of forewing 15.0–15.5 mm. Head brown. Antenna brown, weakly ciliate. Thorax brown. Forewing elongate and narrow with slightly convex outer margin. Forewing ground colour brown, basal third of costal margin covered with grey scales. Costal margin with two black spots in basal half. Discal spot oval. Discal cell with cluster of brown androconial scales along vein R. Postmedial line black, sinuous and expanding into a large rectangular patch between cubital vein and inner margin. Cilia ochreous. Hindwing ground colour orange, gradually getting pale yellow towards inner margin and intensely suffused with fuscous from medial to apical areas. Abdomen covered by greyish hair-like scales. Male genitalia. Uncus elongate and slender, evenly downcurved, dilated subapically and with thin claw-like tip. Arms of tegumen broad and fused in their dorsal 3/4. Tuba analis membranous, scaphium thin and weakly sclerotised. Juxta weakly sclerotised, strongly elongate, consisting of two ribbon-like lateral lobes fused dorsally and separated by medial membrane ventrally, ventrally articulated with bases of sacculi and dorsally connected to ventral margins of sacculi by enlarged membrane of annelifer. Vinculum somewhat longer than tegumen, with thin but well-sclerotised arms forming nearly rectangular frame with thin and medially concave ventral bridge. Intravincular structures reduced and represented by two narrow and weakly sclerotised plostrae bearing thin and elongate caselli consisting of several gelatinous fibers each. Valva broadly lobular, with almost parallel margins. Costa moderately sclerotised, stretching along whole dorsal margin of valva, its outer section ca. 3 times broader than inner one. Valvula rectangular, fused with costa. Editum short and narrow, medially curved, smooth. Tendon and more weakly sclerotised processus momenti forming triangular conjuga. Lamella centralis heavily sclerotised with a longitudinal medial crest, stretching nearly parallel to valva margins, reaching base of distal saccular process but separated from it by thin membrane. Sacculus broad (ca. half of valva width) with convex dorsal margin. Distal saccular process broader than sacculus itself, upcurved blade-like, distally tapered and with narrow trapezoidal apex bearing tiny denticle-like tip. Phallus cylindrical, straight proximally and slightly downcurved distally. Vesica tubular and covered with minute spinulose scobination (except for outer wall) getting more robust distally. Proximal section of vesica somewhat broader than phallic tube, having sack-like, distally tapered and recurved proximal dorsal diverticulum bearing short but robust, conical cornutus apically. Medial ventral diverticulum short, narrow conical. Distal section of vesica slightly narrower than phallic tube, hooklike upcurved and with large blade-like distal cornutus on its outer side and small conical diverticulum opposite of it. Female. Length of forewing 16.0–16.5 mm. Head and thorax brownish-grey. Antenna brown, sparsely ciliate. Forewing ground colour brownish grey. Costal margin with black elliptical antemedial spot. Discal spot black, small, oval. Area between cubital vein and inner margin irrorated with sparse blackish scales. Cilia brownish. Hindwing ground color pale ocherous, gradually getting darker towards marginal area. Abdomen covered with pale yellowish grey hair-like scales. Female genitalia. Papilla analis trapezoidal with rounded corners, weakly setose. Apophyses equally thin, apophysis anterioris same width as apophysis posterioris and about half the length of the latter. Ductus bursae heavily sclerotised, flattened, posteriorly tapered, and folded dorsad along its medial axis. Corpus bursae elongate, its posterior section sack-like, gelatinous and covered with fine scobination and graniculi. Anterior section of corpus bursae ca. 1/3 as long as posterior one, globular, with membranous and densely granulose walls, and bearing two pairs of weakly sclerotised, elongate elliptical signa of different lengths. Appendix bursae obsolete, situated posterior-medially.

Distribution. The new species is currently only known from Mount Victoria in Chin State, west Myanmar.

Etymology. The new species is named after Mr Yasunori Kishida, a renowned Japanese lepidopterist, who sent the first specimen of this peculiar species to the senior author.

Figures

FIGURES 1–8. Teulisna spp.: adults. Depositories of the specimens: 1 in ZSM (ex CGM); 2, CGM; 3–6 in MWM/ZSM; 7 & 8 in MfN.

FIGURES 9–11. Male genitalia of Teulisna spp. Depositories of the specimens dissected: 9 in ZSM (ex CGM); 10 in CGM; 11 in MWM/ZSM.

FIGURES 15–18. Female genitalia of Teulisna spp. Depositories of the specimens dissected: 15 in CGM; 16 and 17 in MWM/ ZSM; 18 in OUMNH.