Meleonoma linearis 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 linearis Wang sp. nov. Figs 5 , 21

Type material.

China, Hainan: Holotype ♂, Tianchi (18.73N, 108.87E), Jianfengling, 787 m, 13.VII.2015, leg. QY Wang et al., slide No. YAH15402. Paratypes (15♂): 1♂, 12.VII.2015, other same data as holotype; 5♂, Tianchi, Jianfengling, 787 m, 5-8.III.2016, leg. QY Wang et al.; 1♂, Duowenling, 207 m, 20.VIII.2017, leg. X Bai et al.; 3♂, Gaoshanling, 171 m, 18-19.VIII.2017, leg. X Bai et al.; 1♂, Bawangling, 146 m, 16.VIII.2017, leg. X Bai et al.; 1♂, Nankai, Yinggeling, 270 m, 8.XI.2016, leg. X Bai et al.; 1♂, Dali, Lingshui, 229 m, 24.VIII.2017, leg. X Bai et al.; 2♂, Mt. Diaoluo, 84 m, 22.VII.2017, leg. X Bai et al.

Diagnosis.

The new species can be distinguished from its congeners by the ventral margin of the valva with a spine apically, the rectangular sacculus with a longer digitate dorsoapical process and a small triangular ventroapical process, and the phallus with two stout spine-shaped cornuti. It is similar to M. triangula Wang, 2016 superficially, but can be distinguished by the valva subparallel from base to apex, the lineate transtilla, and the phallus with two cornuti. In M. triangula , the valva is widened distally and produced dorsoapically, the transtilla is triangular, and the phallus lacks a cornutus ( Yin and Wang 2016b: 135, fig. 6).

Description.

Adult (Fig. 5 ). Wingspan 9.5-10.0 mm. Head yellow, in some individuals, head blackish brown, yellow along dorsal margin of eyes and occiput. Labial palpus yellow; second segment with dense blackish brown scales on outer surface, forming a ring at apex; third segment ca. 1/2 length of second segment, with dense blackish brown scales. Antenna yellow; scape blackish brown basally; flagellum alternated with blackish brown on dorsal surface. Thorax blackish brown, pale yellow laterally; tegula blackish brown basally, pale yellow distally. Forewing pale yellow, with scattered blackish brown scales; with a rounded black spot at base below costal margin, with an ovate blackish brown spot near base of cell; costal margin blackish brown along basal 1/3; costal spot blackish brown, large, inverted triangular, from between basal 1/3 and basal 2/3 extending crossing anterior margin of cell posteriorly; apical patch blackish brown; tornal spot greyish black, small; discal and plical spots blackish brown; blackish brown dot at anterior and posterior angles of cell, touching costal and tornal spots respectively; dorsum with a diffused blackish brown spot at base; fringe greyish black. Hindwing and fringe grey. Legs yellow, with exception on ventral surface: fore tarsus blackish brown, yellow at apices of basal two tarsomeres, tarsi of mid- and hindlegs blackish brown except yellow at apex of each tarsomere; all tibiae blackish brown except yellow apically.

Male genitalia (Fig. 21 ). Uncus slightly wide at base, narrowed from base to rounded apex. Tegumen U-shaped, widened medially; lateral arm uniformly wide. Valva subparallel from base to apex, with dense long and stout setae distally; apex obtusely rounded, with a spine arising from above ventroapical corner; ventral margin sclerotized, forming a narrow band ending with a long spine apically, with a small sub-triangular process at base; costa convex and sparsely setose basally, shallowly concave medially; transtilla lineate, straight inwards, shortly joined by membrane. Sacculus rectangular, shorter than width; dorsal margin narrowly sclerotized, concave before apex; apex shallowly concave, produced to a clavate dorsoapical process and a small triangular ventroapical process, with a fold from ventroapical process extending obliquely upward to ca. middle of sacculus. Saccus clavate, ca. twice as long as uncus, wide at base, narrowed from base to rounded apex. Juxta V-shaped. Phallus approximately 1.5 × length of valva, widened medially, partly membranous distally, with a straightly clubbed process apically; cornuti being two large stout spines, placed distally.

Female

unknown.

Distribution.

Hainan (Bawangling, Duowenling, Gaoshanling, Jianfengling, Lingshui, Mt. Diaoluo, Yinggeling).

Etymology.

The specific epithet is derived from the Latin linearis (adj., lineate), referring to the lineate transtilla in the male genitalia.

Figures

Figures 4 - 11. Male adults of Meleonoma spp. 4 M. apicicurvata sp. nov. 5 M. linearis sp. nov. 6 M. rostellata sp. nov. 7 M. magnidentata sp. nov. 8 M. bicuspidata sp. nov. 9 M. latiunca sp. nov. 10 M. pectinalis sp. nov. 11 M. hainanensis sp. nov. All holotypes. Scale bars: 2.0 mm.

Figures 20 - 27. Male genitalia of Meleonoma spp. 20 M. apicicurvata sp. nov., slide No. ZXJ 19011 21 M. linearis sp. nov., slide No. YAH 15402 22 M. rostellata sp. nov., slide No. ZXJ 18130 23 M. magnidentata sp. nov., slide No. LJ 17530 24 M. bicuspidata sp. nov., slide No. YAH 15447 25 M. latiunca sp. nov., slide No. ZXJ 18430 26 M. pectinalis sp. nov., slide No. YAH 15502 27 M. hainanensis sp. nov., slide No. YAH 15508. All holotypes. Scale bars: 0.2 mm.