Issikiopteryx suiyangensis Liu & Wang

Liu, Shurong & Wang, Shuxia, 2013, Three new species of the genus Issikiopteryx Moriuti, 1973 (Lepidoptera: Lecithoceridae: Lecithocerinae) from China, Zootaxa 3669 (1), pp. 37-42 : 39-41

Issikiopteryx suiyangensis Liu & Wang , sp. nov.

( Figs. 1b , 2b , 3b, 3d )

Type material. Holotype, 3, CHINA: Kuankuoshui Nature Reserves, Suiyang (27°95'N, 107°19'E), Guizhou Province, 1500 m, 4.vi.2010, leg. Linlin Yang, genitalia slide No. LSR12040. Paratype: 1 ♀, same data as holotype.

Description. Adult ( Fig. 1b ): Wing expanse 18.0– 19.5 mm. Head with vertex pale yellow, frons shiny white. Antenna pale yellow, flagellum blackish brown apically. Labial palpus pale yellow, third segment orange yellow terminally; second segment normally thickened; third segment slender, pointed terminally, a little shorter than second segment. Thorax and tegula grayish brown. Forewing with termen obliquely straight, apex pointed; ground color yellow, darker along costal margin; with a small black dot at base; a large, oblong blackish-brown blotch at basal 1/3, extending from below costal margin to dorsum; distal 1/3 with longitudinal brown streaks extending to apex along veins, forming a large ill-defined blotch; cilia grayish white. Hindwing and cilia whitish yellow. Fore and mid legs whitish yellow, with scattered orange-yellow to brown scales on ventral surface; hind legs whitish yellow, tarsi orange yellow mottled black hair-like scales, with black band at distal edge of each tarsomere.

Male genitalia ( Fig. 2b ): Uncus lobe with basal 2/3 almost rectangular, distal 1/3 bilobed, suboval, heavily sclerotized marginally. Gnathos with basal 2/3 slightly broad, sharply narrowed toward end, hooked at apex. Valva with basal 1/4 broad, dorso-ventrally parallel-sided, narrowed to before cucullus; cucullus somewhat finger-like, armed with numerous bullet-like spines on ventral part, bluntly rounded at apex; costa almost straight, with a quadrate incision at base; costal bar gently arched, sharply angled at dorsal 2/3. Sacculus short and broad, about 1/ 4 length of valva. Juxta rounded anteriorly, widened medially; postero-lateral lobes spine-like, about 1/2 length of juxta. Aedeagus broad at base, slightly narrowed and nearly parallel-sided to near apex, as long as valva, with two short and rounded apical lobes; cornuti consisting of a few exiguous spines near base, thirteen scattered moderate nail-like medial spines, and two large distal spines.

Eighth sternite ( Fig. 3b ): Caudal processes short, pointed apically.

Female genitalia ( Fig. 3d ): Apophyses posteriores about three times length of apophyses anteriores, expanded distally. Lamella antevaginalis indistinct. Antrum large, broadly funneled. Ductus bursae with posterior 1/5 relatively broad, granulous, with a thick digitiform bursae at posterior 1/5; medial 2/5 expanded, having numerous unequally sized strong spines; anterior 2/5 slender. Corpus bursae rounded, spinulate inside; signum an elongate narrow plate, with a transversal median ridge, triangularly protruded medially, about 1/2 width of corpus bursae.

Diagnosis. This new species is similar to I. obtusangula Fan & Li, 2008, but can be distinguished from the latter by the following characters: the cucullus somewhat elongate finger-like; the cornuti consisting of a few exiguous spines at base, thirteen moderately sized nail-like medial spines, and two large distal spines in the male genitalia; the male short caudal processes of the eighth sternite pointed apically. In I. obtusangula , the cucullus is somewhat elongate oval; the cornuti are composed of one large and four small spines distributed in the distal half; and the male caudal processes of the eighth sternite are short and obtuse apically.

Distribution. China (Guizhou).

Etymology. The specific name is derived from the type locality, Suiyang of Guizhou Province.

Figures

FIGURE 1. a – c, Adults of Issikiopteryx spp. a, I. parelongata sp. nov., holotype; b, I. suiyangensis sp. nov., paratype; c, I. nigeriflava sp. nov., paratype (a, c Ə, b Ƥ).

FIGURE 2. a – c, Male genitalia of Issikiopteryx spp. a, I. parelongata sp. nov., holotype, slide No. LSR 12039; b, I. suiyangensis sp. nov., holotype, slide No. LSR 12040; c, I. nigeriflava sp. nov., holotype, slide No. LSR 11246.

FIGURE 3. a – d, Male eighth sternite of Issikiopteryx spp. a, I. parelongata sp. nov., holotype, slide No. LSR 12039; b, I. suiyangensis sp. nov., holotype, slide No. LSR 12040; c, I. nigeriflava sp. nov., holotype, slide No. LSR 11246; d, female genitalia of I. suiyangensis sp. nov., paratype, slide No. LSR 12044.