Indomyrlaea fastigipalpa 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 : 319-323

Indomyrlaea fastigipalpa Ren & Li sp. nov.

( Figs 6, 7 , 22 , 27 )

Diagnosis. This new species is similar to I. sutasoma , but can be distinguished from the latter by the labial palpus with second segment 3 times length of the diameter of compound eye in the male; the gnathos with medial lobe twice length of lateral lobe, the aedeagus with dense short thorns forming two triangular areas near apex in the male genitalia; and the antrum 2.5 times as wide as long, H-shaped in the female genitalia. In I. sutasoma , the second segment of the labial palpus is twice length of the diameter of compound eye in the male; the medial lobe of the process of gnathos is the same length as the lateral lobe, the aedeagus has sparse dentations near apex in the male genitalia; and the antrum is 1.5 times as wide as long, almost rectangular in the female genitalia.

Description. Wingspan 23.0−24.0 mm. Male ( Fig. 6 ): Vertex with two cluster brownish long scales surrounded by antenna, and with yellowish brown scales between compound eyes. Antenna with scape twice as long as wide, blackish brown on dorsal surface, yellowish white on ventral surface; flagellum dark brown, sinus shallow, covered with vertically arranged black scale tufts, and a row of short, black toothlet beneath scale tufts. Labial palpus yellowish white; second segment elongate, vertically upturned, 3.0 times length of diameter of compound eye; third segment short, bend forward, about 1/15 length of second segment. Maxillary palpus yellowish white. Patagium, tegula and thorax coppery brown. Forewing ground color yellowish brown, mixed with blackish, whitish and ocherous brown scales; basal 1/4 with dense, thick scales, its anterior 1/3 black, posterior 2/3 grayish black, yellowish white at borderline; antemedian line and discal spot absent; postmedial line grayish white, sinuate, margined with black on both sides, angled inward at R4 and CuA2; terminal line black; cilia yellowish brown. Hindwings grayish brown, opaque; cilia yellowish white. Foreleg ocherous brown; midleg yellowish white, tarsus mixed with ocherous brown; hindleg pale yellowish brown, tibia with long scales on dorsal surface.

Female ( Fig. 7 ): Vertex with grayish brown lobate scales. Antenna with scape twice as long as wide, yellowish brown; flagellum yellowish brown and ocherous brown. Labial palpus yellowish white; second segment 1.5 times length of diameter of compound eye; third segment about 2/5 length of second segment, tinged with reddish brown on outer surface. Maxillary palpus yellowish white. Patagium, tegula and thorax fuscous grayish brown. Forewing ochreous brown, mixed with numerous reddish brown and blackish brown scales on lower half and between postmedial line and terminal line; antemedian line absent; discal spot faint, blackish brown; postmedial line grayish brown, sinuate, concave at R4 and CuA2, margined with blackish brown; terminal line black; cilia brown. Hindwing grayish brown, opaque; cilia yellowish brown. Legs gray, mottled dark purple.

Male genitalia ( Fig. 22 ). Uncus bell-shaped, rounded at apex. Gnathos trilobate, anchor-shaped, lateral lobes crescent, medial lobe cuniform, twice length of lateral lobe. Transtilla weakly sclerotized. Valva broad in basal 2/5, narrowed in distal 3/5 and about half width of basal 2/5, rounded apically; bearing dense long hair medially from basal 1/5 to apex; costa strongly sclerotized, about half width of valva at base, tapered to apex; sacculus strongly sclerotized, narrowed, clubbed, 3/4 length of valva, straight in basal 2/3, curvedly concave in distal 1/3, with a strong hooked process distally. Vinculum U-shaped, 1.4 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 1.3 times length of valva, with dense short thorns forming two triangular areas near apex; cornuti comprised of numerous spinule, small triangular thorns and sclerotized crimples: an arched, spined band at base, followed by a bunch of needlelike thorns, a bunch of subuliform thorns from basal 1/3 to middle, numerous granular spines from middle to apex. Culcita four pairs, three-dimensional arranged.

Female genitalia ( Fig. 27 ). Antrum 2.5 times as wide as long, H-shaped. Ductus bursae sclerotized and punctate, membranous and smooth at junction of ductus bursae and corpus bursae. Corpus bursae twice length of ductus bursae, circled dense long bodkin-shaped spines at middle, anterior half membranous and smooth, posterior half thickened and weakly sclerotized. Caudal bursa bearing minute spines distally. Ductus seminalis incepted end of caudal bursa.

Type material. Holotype ♂, China: Mt. Jianfeng (18°50'N 108°43'E), Hainan, 960 m, 13−15-IV-2013, coll. Yingdang Ren & Xiaoguang Liu, gen. slide No. RYD2012155 ( HAASM).

Paratypes: China: Hainan: 1 ♀, same data as for holotype, gen. slide No. RYD20120256 ( HAASM); 2 ♀, Mt. Diaoluo (18°39'N 109°54'E), 930 m, 9-IV-2013, coll. Yingdang Ren & Xiaoguang Liu, gen. slide Nos. RYD20120258♀, RYD20120261♀ ( HAASM); 1 ♂, Mt. Limu (19°09'N 109°28'E), Qiongzhong, 640 m, 5-V-2014, coll. Tengteng Liu, Wei Guan & Xuemei Hu, gen. slide No. LHX14189 ( NKUM).

Distribution. China (Hainan).

Etymology. The specific name is derived from the Latin prefix fastigatus -, meaning upturned, rising to a point, and morphological term palpus, referring to the upturned labial palpus with third segment pointed at apex in male.

Figures

FIGURE 2 - 7. Adults of Indomyrlaea spp. 2, I. sutasoma, ♂; 3, I. sutasoma, ♀; 4, I. bannensis sp. nov., paratype, ♂; 5, I. bannensis sp. nov., paratype, ♀; 6, I. fastigipalpa sp. nov., holotype, ♂; 7, I. fastigipalpa sp. nov., paratype, ♀ (scales bar = 2.0 mm).

FIGURES 21 − 22. Male genitalia of Indomyrlaea spp. 21, I. bannensis sp. nov., holotype, slide No. LHX 12615; 22, I. fastigipalpa sp. nov., holotype, slide No. RYD 2012155 (scales bar = 0.5 mm).

FIGURES 26 – 29. Female genitalia of Indomyrlaea spp. 26, I. bannensis sp. nov., paratype, slide No. LHX 11038; 27, I. fastigipalpa sp. nov., paratype, slide No. RYD 20120261; 28, I. proceripalpa sp. nov., paratype, slide No. LHX 12235; 29, Ceroprepes ophthalmicella (Christoph, 1881) (as type of Sandrabatis crassiella Ragonot, 1893 syn. nov.), slide No. 9.9 Nuss, 2006 (scales bar = 0.5 mm).