Meleonoma bidentata Wang, 2020

Zhu, Xiaoju, Cai, Bo & Wang, Shuxia, 2020, Genus Meleonoma Meyrick, 1914 (Lepidoptera, Autostichidae) from Hainan Island, China, with descriptions of sixteen new species, ZooKeys 975, pp. 125-157 : 125

Meleonoma bidentata Wang sp. nov. Figs 15 , 31 , 41

Type material.

China, Hainan: Holotype ♂, Bawangling (19.10N, 109.11E), 245 m, 8.V.2013, leg. YH Sun et al., slide No. ZXJ18110. Paratypes (8♂2♀): 3♂1♀, 7-9.V.2013, other same data as holotype, slide No. YAH15442♀; 1♂, Bawangling, 28.VII.2013, leg. HL Yu & KL Liu; 2♂, 146 m, 1♀, 225 m, 13-14.VIII.2017, Bawangling, leg. X Bai et al.; 2♂, Lemei, Dongfang, 81 m, 3.I.2018, leg. MJ Qi & S Yu.

Diagnosis.

The new species can be distinguished by the uncus with two denticles apically and the medially widened tegumen with slender lateral arm slightly extending inward anteriorly; and by the entirely spiculate corpus bursae with an elongate dentate signum at bottom.

Description.

Adult (Fig. 15 ). Wingspan 10.0-11.0 mm. Head yellow; vertex blackish brown, lateral scales yellow basally. Labial palpus yellow; first and second segments with dense blackish grey scales on outer surface; second segment inflated at apex by rough scales; third segment shorter than 1/2 length of second segment, greyish black on basal half. Antenna with scape yellowish brown on dorsal surface, yellow on ventral surface; flagellum yellow alternated with greyish black. Thorax and tegula greyish black. Forewing dark brown, with diffused yellow spot near base below costal margin and at base of dorsum respectively; costal margin with median yellow spot rounded, from before middle reaching middle of cell posteriorly, edged with sparse black scales, distal yellow spot larger, inverted triangular, from distal 1/4 extending ventrad crossing middle of wing, with a small black dot at middle anteriorly; cell with a black spot beyond middle, anteriorly touching median spot of costal margin, with a large diffused black spot at outer margin, interrupted by a yellow spot; plical spot black, placed at distal 2/5 of fold, bordered by a yellow spot at outside; yellow dorsal spot rounded, at end of fold; fringe greyish black, tinged with yellow basally. Hindwing and fringe grey. Legs yellow, with exception on ventral surface: fore coxa with scattered blackish brown scales, tarsi of fore- and midlegs blackish brown, yellow at apices of basal two and apical one tarsomeres, hind tarsus with basal three tarsomeres blackish brown except yellow at apex of each tarsomere; all femora with dense blackish brown scales, tibiae blackish brown except yellow apically.

Male genitalia (Fig. 31 ). Uncus narrowed sub-basally, widened at basal 2/5, thereafter slightly narrowed to apex; apex bifurcated, forming two denticles apically. Gnathos sclerotized laterally, membranous anteriorly. Tegumen widened medially; lateral arm slender, slightly extending inward anteriorly. Valva wide at base, weakly narrowed medially, gradually widened to apex; apex broadly rounded, with large dense setae; ventral margin heavily sclerotized, forming a sclerotized band with an apical spine exceeding apex of valva; costa narrowly banded, reaching apex of valva, with long setae; transtilla bilobed: dorsal lobe narrowly extended to pointed apex, indistinctly connected by membrane, ventral lobe shorter than dorsal lobe, rounded at apex. Sacculus sub-quadrate; apex heavily sclerotized, forming a setose narrow band; dorsal margin narrowly sclerotized. Saccus wide at base, narrowed to before obtuse apex; longer than uncus. Juxta broadly arched. Phallus stout, almost twice length of valva, narrow at base, widened medially; distal half membranous, full of fine rumples, with a wide sclerotized band from middle curved spirally to near apex.

Female genitalia (Fig. 41 ). Papillae anales rectangular, setose. Apophyses posteriores approximately 3.0 × as long as apophyses anteriores. Eighth sternal plate spiculate; posterior margin with long setae, notched at middle. Lamella antevaginalis straight posteriorly and laterally, slightly concave medially on anterior margin, with two reticulate areas anterolaterally. Antrum band-shaped, arched backwards medially. Ductus bursae membranous, posterior 3/4 narrower, wrinkled; anterior 1/4 wide, with dense granules; ductus seminalis arising from anterior 1/3 of ductus bursae. Corpus bursae half as long as ductus bursae, entirely spiculate, irregular in shape; signum elongate rectangular, with numerous teeth and one large apical spine, placed at bottom of corpus bursae.

Distribution.

Hainan (Bawangling, Dongfang).

Etymology.

The specific epithet is derived from the Latin bidentatus (adj., bidentate), referring to the two apical denticles of the uncus.

Figures

Figures 12 - 19. Male adults of Meleonoma spp. 12 M. ornithorrhyncha sp. nov. 13 M. parilis sp. nov. 14 M. quadritaeniata sp. nov. 15 M. bidentata sp. nov. 16 M. apicirectangula sp. nov. 17 M. conica sp. nov. 18 M. puncticulata sp. nov. 19 M. robustispina sp. nov. All holotypes. Scale bars: 2.0 mm.

Figures 28 - 35. Male genitalia of Meleonoma spp. 28 M. ornithorrhyncha sp. nov., slide No. YAH 15446 29 M. parilis sp. nov., slide No. YAH 15444 30 M. quadritaeniata sp. nov., slide No. YAH 15450 31 M. bidentata sp. nov., slide No. ZXJ 18110 32 M. apicirectangula sp. nov., LJ 17529 33 M. conica sp. nov., slide No. LJ 17553 34 M. puncticulata sp. nov., slide No. YAH 15063 35 M. robustispina sp. nov., slide No. ZXJ 19014. All holotypes. Scale bars: 0.2 mm.

Figures 36 - 41. Female genitalia of Meleonoma spp. 36 M. rostellata sp. nov., slide No. ZXJ 18410 37 M. magnidentata sp. nov., slide No. ZXJ 18261 38 M. pectinalis sp. nov., slide No. YAH 15095 39 M. ornithorrhyncha sp. nov., slide No. ZXJ 19027 40 M. parilis sp. nov., slide No. YAH 15503 41 M. bidentata sp. nov., slide No. YAH 15442. All paratypes. Scale bars: 0.2 mm (36, 38 - 41); 0.5 mm (37).