Ashibusa similativalvula Li, 2023

Zhang, Di & Li, Houhun, 2023, A taxonomic review of the genus Ashibusa Matsumura, 1931 (Lepidoptera: Cosmopterigidae) from China, Zootaxa 5380 (3), pp. 265-281 : 278-279

Ashibusa similativalvula Li , sp. nov.

urn:lsid:zoobank.org:act:67D13ABF-8619-4AB0-9B8A-6B6

( Figs 10 , 18 , 26 )

Type material. CHINA, Hainan: Holotype ♂, Mt. Limu , Qiongzhong County (19.17°N, 109.76°E), 640 m, 4.V.2014, leg. TT Liu et al., slide No. ZD 21537.

Paratypes: 2♂, Mt. Limu , Qiongzhong County (19.17°N, 109.76°E), 640 m, 4. V.2014, leg. TT Liu et al., slide No. ZD 21441 ; 1♂, Pailiao Village, Qixianling , Baoting County (18.70°N, 109.67°E), 130 m, 25.IV.2013, leg. YH Sun et al., slide No. ZD 21440 ; 1♂, Hongxin Village, Yuanmen Town , Baisha County (19.08°N, 109.52°E), 430 m, 16.IV.2014, leg. TT Liu et al., slide No. ZD 21453 ; 1♂, Mt. Wuzhi (18.91°N, 109.70°E), 732 m, 2.VIII.2017, leg. X Bai et al., slide No. ZD21403 ; 2♂ 1♀, Tianchi, Jianfengling (18.73°N, 108.86°E), 787 m, 11–15.VII.2015, leg. QY Wang et al., slide Nos. ZD 21371 ♂, ZD21442 ♀; 1♂, Qixianling (18.70°N, 109.68°E), 302 m, 9.VII.2015, leg. QY Wang et al., slide No. ZD 21402; Guangdong : 1♂, Hebao Island, Zhuhai City , 30 m, 11. V.2010, leg. BB Hu & J Zhang, slide No. ZD 21530; Yunnan : 1♂, Yexianggu, Xishuangbanna (22.17°N, 100.87°E), 762 m, 17.VII.2014, leg. KJ Teng et al., slide No. ZD 21385 ; 1♂, Yexianggu, Xishuangbanna (22.17°N, 100.87°E), 762 m, 13.VII.2015, leg. KJ Teng & X Bai, slide No. ZD 21414 .

Diagnosis. The new species is similar to A. lativalvula Zhang et Li, 2009 superficially. It can be distinguished by the forewings without a white speckle between the fold and the dorsum; in the male genitalia by the right brachium produced inward medially, the dorsal process 1/6 the length of the right brachium, and distal 1/3 of the valvae expanded elliptically; and in the female genitalia by the subrectangular corpus bursae. In A. lativalvula , the forewings have a pale yellowish white speckle between the fold and the dorsum ( Zhang et Li, 2009: 337, fig. 4); the right brachium is not produced medially, the relatively longer dorsal process is 1/5 the length of the right brachium, and the distal 1/3 of the valvae is expanded rectangularly ( Zhang et Li, 2009: 338, fig. 10); and the corpus bursae is elliptical. The species resembles A. ledongensis sp. nov. in the male genitalia, and the differences between them are stated in the diagnosis of the latter species.

Description. Adult ( Fig. 10 ). Wingspan 9.5–12.0 mm.

Head. Vertex and frons white, vertex mixed black scales laterally.Antennae pale yellow, scape white terminally, flagellum alternated with brown dorsally. Labial palpi white, second palpomere with dark scales at apex, third palpomere yellowish brown at basal 2/5 and near apex.

Thorax. Dorsum of mesothorax and tegulae white, with orange yellow stripes. Forewings ochreous yellow, mottled with white and brown scales at base, densely covered with black scales from near base to basal 2/5, forming a large black blotch with a few white and pink scales, sparsely with black scales distally; cream fascia extending from beyond 1/2 of costal margin to dorsum; small black spot at end of discal cell, surrounded by white scales; white streak from distal 1/5 of costal margin obliquely outward to termen, edged with black scales; white streak from outer margin of preceding white streak extending along termen to apical angle; fringes yellowish brown, basally mixed with black and pink along dorsum. Hindwings and fringes yellowish brown. Foreleg with coxa and femur yellowish white, tibia black, white at apex, tarsus pale yellow; midleg with femur and tibia black, tibia pale yellow at middle, white at apex, tarsus pale yellow; hindleg with femur white mixed with black scales, tibia with whorls of bristles pale yellow basally, pink mixed with black distally, tarsus with 1–3 tarsomeres pale yellow, 4–5 tarsomeres white, first tarsomere ringed with white at apex.

Male abdomen and genitalia ( Fig. 18 ):

Male abdomen. Pleural lobes of eighth segment subquadrate, 2/3 length of valva.

Male genitalia. Socius with right brachium uniformly wide from base to basal 2/5, obtusely produced inward medially, narrowed to apex distally; dorsal process arising from basal 3/5, thorn shaped, 1/6 length of right brachium. Left brachium half length of right brachium, narrowed to middle, equally narrow distally. Valvae club shaped, slightly narrowed at middle, distal 1/3 expanded outward elliptically, with dense setae in distal 2/5 ventrally. Left valvella slender, 1/3 length of phallus, uniformly wide; right valvella reduced. Phallus uniform basally, narrowed distally.

Female genitalia ( Fig. 26 ). Apophyses posteriores twice as long as apophyses anteriores. Sterigma wide and short. Ductus bursae slightly longer than apophyses posteriores, membranous. Corpus bursae subrectangular, as long as apophyses posteriores; entrance at posterior 1/3 of corpus bursae; signum absent.

Distribution. China (Guangdong, Hainan, Yunnan).

Etymology. The specific epithet of this new species is derived from the Latin simi -, referring to the similarity of the new species to A. lativalvula Zhang & Li, 2009 .

Figures

FIGURES 4‒11. Adults of Ashibusa spp. All holotypes and males. 4. A. apicodonta sp. nov.; 5. A. biniprocessa sp. nov.; 6. A. dilatirotunda sp. nov.; 7. A. improjecta sp. nov.; 8. A. ledongensis sp. nov.; 9. A. longispina sp. nov.; 10. A. similativalvula sp. nov.; 11. A. subfalcativalva sp. nov.. Scales = 2.0 mm.

FIGURES 16‒19. Male abdomen and genitalia of Ashibusa spp.All holotypes. 16. A. ledongensis sp. nov., slide No. ZD21400; 17. A. longispina sp. nov., slide No. ZD21529; 18. A. similativalvula sp. nov., slide No. ZD21537; 19. A. subfalcativalva sp. nov., slide No. ZD21404. Scales = 0.2 mm.

FIGURES 24–27. Female genitalia of Ashibusa spp. All paratypes. 24. A. ledongensis sp. nov., slide No. ZD21417; 25. A. longispina sp. nov., slide No. ZD21533; 26. A. similativalvula sp. nov., slide No. ZD21442; 27. A. subfalcativalva sp. nov., slide No. ZD21514. Scales = 0.5 mm.