Ripeacma dissectaedeaga Wang, 2022

Xu, Zhixin & Wang, Shuxia, 2022, Description of twelve new species of the genus Ripeacma Moriuti, Saito & Lewvanich (Lepidoptera: Autostichidae) from China, Zootaxa 5168 (5), pp. 521-540 : 527-528

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Ripeacma dissectaedeaga Wang

sp. nov.

Ripeacma dissectaedeaga Wang , sp. nov.

( Figs 7 View FIGURES 3–8 , 19 View FIGURES 15–20 )

Type material. CHINA, Yunnan: Holotype ♂, Pukawang Village (27.84°N, 98.32°E), Dulongjiang Town , Gongshan County, Nujiang , 1335 m, 5.VI.2017, slide No. XZX20418 View Materials . GoogleMaps

Paratypes: Yunnan: 1♂, Pukawang Village, Dulongjiang Town , Gongshan County, Nujiang , 1335 m, 5−7. VI.2017, slide No. XZX20268 View Materials ; 2♂, Qinlangdang, Mt. Gaoligong, Nujiang , 380 m, 28.V.2017, leg. KJ Teng et al., slide No. XZX20357 View Materials .

Diagnosis. The new species is similar to R. bilobata Wang, 2004 and R. magnimaculata sp. nov. in the forewing pattern and in the features of the male genitalia. It can be separated from R. bilobata by valva slightly widened to apex and the sacculus produced to a spine-shaped process distally. In R. bilobata , the valva is subparallel sided and the sacculus is sub-digitate distally. The differences between R. dissectaedeaga sp. nov. and R. magnimaculata sp. nov. are stated under the latter.

Description. Adult ( Fig. 7 View FIGURES 3–8 ). Wingspan 12.0 −13.0 mm.

Head yellow. Labial palpus pale yellow; first palpomere black on ventral surface, second palpomere black distally. Antenna with scape black on dorsal surface, yellow on ventral surface; flagellum yellow, ringed with yellowish brown on dorsal surface.

Thorax yellow; tegula dark brown basally, yellow distally. Forewing yellow, with two large black speckles: basal speckle sub-triangular, from base to basal 1/3 between costal margin and fold, outer margin sinuate; median speckle sub-semicircular, from between basal 2/5 and 3/4 of costal margin narrowed to above posterior angle of cell; black stripe formed by dense black scales diffused from apex to posterior corner of termen; fringe greyish black. Hindwing and fringe grey. Legs yellow; on dorsal surface, femur and tibia of foreleg black, tarsus black at middle of first tarsomere and at base of second tarsomere as well as on entire third and fourth tarsomeres, femur of midleg with black scales, tibia black, ringed with yellow at both middle and apex, tarsus black at middle of first tarsomere and at base of other tarsomeres, femur of hindleg with black scales at base and at apex; on outer surface, tibia of hindleg with black scales at base and near apex, tarsus with sparse black scales.

Male genitalia ( Fig. 19 View FIGURES 15–20 ). Uncus narrow and parallel sided in basal 1/3, with a long seta at basal 1/3 laterally, inflated from basal 1/3 to broadly rounded apex. Gnathos X-shaped; ventral plate extending obliquely dorsad to pointed end, concave anteromedially; basal arm slender, arched outward medially, extending inward to join ventral plate at middle on posterior margin. Tegumen widened to posterior 3/5, with a large semicircular anterior emargination; lateral arm widely banded, as long as median width. Valva wide at base, narrowed to basal 1/4, widened from 1/4 to about middle length, distal half subparallel sided, with a cluster of thick setae from basal 1/4 to 2/5; costa narrowly banded, reaching beyond middle of costal margin; transtilla lobes extending dorsad mesially, each lobe expanded distally, touching each other mesially by membrane; sacculus aequilate in basal half, gradually narrowed from 1/2 to 3/4, distal 1/4 spine-shaped. Saccus shorter than uncus, parallel sided basally, obtusely rounded at apex. Juxta U-shaped; lateral lobe slender. Aedeagus longer than 3/4 length of valva, bifurcate from middle, forming two large subequal distal processes: one process uniformly slender, pointed apically; the other process almost aequilate, pointed at apex.

Female unknown.

Distribution. China (Yunnan).

Etymology. The specific epithet is derived from the Latin dissectus and aedeagus, referring to the distally bifurcated aedeagus.