Meleonoma dorsibacilliformis, Wang & Zhu, 2020

Wang, Shuxia & Zhu, Xiaoju, 2020, Study of the genus Meleonoma Meyrick, 1914 (Lepidoptera: Autostichidae) from China, with descriptions of fifteen new species, Zootaxa 4838 (3), pp. 331-357 : 337

Meleonoma dorsibacilliformis sp. nov.

( Figs. 5 , 21 )

Type material. CHINA, Guangxi: Holotype ♂, Mt. Dayao (24.15°N, 110.21°E), Jinxiu County, 1364 m, 19.VII.2015, leg. MJ Qi & SN Zhao, slide No. YAH15415.

Diagnosis. The new species is similar to M. dorsolobulata Wang, 2016 in the male genitalia, but can be distinguished by the valva sub-parallel from middle to apex, the sacculus with a clavate process, and the slender saccus longer than the uncus. In M. dorsolobulata , the valva is produced dorsoapically, the sacculus has a lobate process, and the wider saccus is as long as the uncus ( Yin &Wang 2016b: 136, Fig. 7 ).

Description. Adult ( Fig. 5 ). Forewing length 4.8 mm.

Head yellow (worn). Labial palpus yellow; second segment with scattered blackish grey scales, forming a blackish grey annulation at apex; third segment shorter than second segment, tinged with blackish grey scales medially. Antenna yellow; flagellum annulated with blackish grey.

Thorax yellow (worn); tegula blackish brown basally, yellow distally. Forewing parallel from base to basal 3/4, then slightly narrowed to narrowly rounded apex; ground color yellow, mottled with greyish black scales; costal spot greyish black, slightly beyond middle; apical patch greyish black, rounded; tornal spot greyish black; discal and plical spots black (worn); fringe greyish black, mixed with greyish yellow. Hindwing and fringe greyish black. Legs yellow; on ventral surface, fore coxa and femur mixed with blackish brown scales, tibiae of fore- and midlegs blackish brown mixed with yellow scales, all tarsi blackish brown except yellow at apex of each tarsomere.

Male genitalia ( Fig. 21 ). Uncus slender, spine-shaped, narrowed from base to pointed apex. Gnathos weakly sclerotized laterally, reaching anterior margin of tegumen, membranous anteriorly. Tegumen crescent, widened medially, narrowed anterolaterally. Valva with distal half sub-parallel to rounded apex; costa straight, reaching middle of valva. Sacculus sub-quadrate; apex heavily sclerotized, forming a narrow densely setose band; dorsal margin with a slender, clavate process extending from middle horizontally outward, far exceeding apex of sacculus, rounded apically. Saccus elongate, longer than uncus, wide at base, narrowed to basal 1/3, parallel from basal 1/3 to pre-apex, apex narrowly rounded. Juxta U shaped. Aedeagus shorter than 1.5 times length of valva; basal half tubular; distal half almost membranous, with two sclerotized bands: shorter band inflated distally, longer band straightly slender.

Female unknown.

Distribution. China (Guangxi).

Etymology. The specific epithet is derived from the Latin dors - and bacilliformis, referring to the clavate process at the dorsal margin of the sacculus in the male genitalia.

Figures

FIGURES 3‒8. Adults of Meleonoma spp. 3, M. catenata sp. nov., paratype, ♀; 4, M. dilativalva sp. nov., holotype, ♂; 5, M. dorsibacilliformis sp. nov., holotype, ♂; 6, M. longiprocessa sp. nov., holotype, ♂; 7, M. parvissima sp. nov., holotype, ♂; 8, M. tenuiuncata sp. nov., holotype, ♂. Scales = 2.0 mm.

FIGURES 19‒24. Male genitalia of Meleonoma spp. 19, M. catenata sp. nov., slide No. YAH15172; 20, M. dilativalva sp. nov., slide No. YAH15361; 21, M. dorsibacilliformis sp. nov., slide No. YAH15415; 22, M. longiprocessa sp. nov., slide No. YAH15420; 23, M. parvissima sp. nov., slide No. YAH15390; 24, M. tenuiuncata sp. nov., slide No. YAH15410.All holotypes. Scales = 0.2 mm.