Indomyrlaea nigra Ren & Li

Ren, Yingdang, Yang, Linlin & Li, Houhun, 2015, Taxonomic review of the genus Indomyrlaea Roesler & Küppers 1979 of China, with descriptions of five new species (Lepidoptera: Pyralidae: Phycitinae), Zootaxa 4006 (2), pp. 311-329 : 323-324

Indomyrlaea nigra Ren & Li sp. nov.

( Figs 8 , 23 )

Diagnosis. This new species can be recognized superficially by the unpatterned blackish brown forewing. Its male genitalia is similar to I. fastigipalpa Ren & Li sp. nov., but can be distinguished from the latter by the following characters: the uncus is almost trapezoidal, truncate at apex, the medial lobe of the gnathos is about the same length as the lateral lobe, the valva is acinaciform in distal half, the aedeagus has dense short thorns forming a narrowed band near apex. In I. fastigipalpa Ren & Li sp. nov., the uncus is bell-shaped, rounded at apex, the medial lobe of the gnathos is about twice length of the lateral lobe, the valva is narrowed at middle and upwardly curved in distal half, the aedeagus has dense short thorns forming two triangular areas near apex.

Description. Male ( Fig. 8 ): Wingspan 22.0 mm. Head grayish brown. Antenna with scape 1.5 times as long as wide, blackish brown on dorsal surface, yellowish white on ventral surface; flagellum dark brown, sinus gentle, with yellowish brown, vertical arranged scale tufts, and a row of short, black toothlet beneath scale tufts. Labial palpus yellowish white; second segment elongate, gently upturned, 2.5 times length of diameter of compound eye; third segment short, bend forward. Maxillary palpus creamy white. Patagium, tegula and thorax blackish brown. Forewing ground color blackish brown; basal 1/4 with dense, thick scales from upper margin of cell to dorsum; antemedian line and discal spot absent; postmedial line grayish obscure; terminal line black; cilia brown. Hindwings grayish yellow, opaque; cilia gray. Legs yellowish brown; foreleg mixed with numerous black scales, midleg and hindleg tinged with black, hind tibia with long scales on dorsal surface.

Male genitalia ( Fig. 23 ). Uncus almost trapezoidal, truncate at apex. Gnathos trilobate, anchor-shaped, lateral lobes crescent, medial lobe cuniform, slightly narrower than lateral lobe. Transtilla weakly sclerotized. Valva gradually narrowed from base to middle, acinaciform in distal half: sharply narrowed from middle to distal 1/4, about 1/3 width of basal half, slightly broadened to distal 1/8 then narrowed toward rounded apex; bearing dense stout setae in apical 1/4, with long hairs along dorsal margin of sacculus from basal 1/4 to middle; costa strongly sclerotized, about half width of valva; sacculus clavate, stretched half of valva, gently convex, with a sharp horned process distally. Vinculum U-shaped, 1.2 times as long as wide. Juxta U-shaped, shield-shaped on median area, with a pair of fingerlike lateral lobes bearing sparse setae. Aedeagus cylindrical, stout, strongly sclerotized, about same length of valva, with dense short thorns forming a short, narrowed band near apex; cornuti comprised of numerous spinule, small triangular thorns and sclerotized crimples: granular spines at base, thorns differ in length form basal 1/3 to distal 1/3, needlelike thorns from distal 1/3 to 1/6, a clubbed dentate thorn at distal 1/3, and a well sclerotized conic thorn near apex. Culcita four pairs, three-dimensional arranged.

Female unknown.

Type material. Holotype ♂, China: Baihualing (25°24'N 98°49'E), Mt. Gaoligong, Baoshan, Yunnan, 1473 m, 29-VII-2013, coll. Shurong Liu, Yuqi Wang & Kaijian Teng, gen. slide No. LHX14196 ( NKUM).

Distribution. China (Yunnan).

Etymology. The specific name is derived from the Latin nigra , meaning black, referring to the blackish brown forewing.

Figures

FIGURES 8 – 13. Adults of Indomyrlaea spp. 8, I. nigra sp. nov., holotype, ♂; 9, I. sinuapalpa sp. nov., holotype, ♂; 10, I. proceripalpa sp. nov., holotype, ♂; 11, I. proceripalpa sp. nov., paratype, ♀; 12, I. phaeella Hampson, 1903, type, ♂; 13, Ceroprepes ophthalmicella (as type of Sandrabatis crassiella Ragonot, 1893 syn. nov.), ♀ (scales bar = 2.0 mm).

FIGURES 23 − 24. Male genitalia of Indomyrlaea spp. 23, I. nigra sp. nov., holotype, slide No. LHX 14196; 24, I. proceripalpa sp. nov., holotype, slide No. LHX 12167 (scales bar = 0.5 mm).