Loxoneptera medialis (Caradja, 1925) Xiang & Chen & Zhang, 2021

Xiang, Lanbin, Chen, Kai & Zhang, Dandan, 2021, Revision and phylogeny of the genus Loxoneptera Hampson, 1896 (Lepidoptera, Crambidae, Pyraustinae), based on morphology and molecular data, ZooKeys 1036, pp. 75-98 : 75

Loxoneptera medialis (Caradja, 1925) comb. nov. Figs 9 , 21 , 28

Calamochrous medialis Caradja, 1925: 363.

Material examined.

Type material. Holotype, ♂, Canton, Type, Car.[adja], Gen. Praep.[Prep.] EGM 3 (MGAB).

Other material examined. China. Guangdong: 1♂, Dongmei Village, Potou District, Zhanjiang , 10.IV.2016, leg. Li Zhiqiang & Li Jun, genitalia slide no. SYSU0987, molecular voucher no. LEP0171 ; 1♀, Liuzhang Village, Beihe Country, Leizhou , 9.IV.2016, leg. Li Zhiqiang & Li Jun, genitalia slide no. SYSU0990, molecular voucher no. LEP0173 . Hainan: 1♂, Jianling Reserve , 18.87°N, 110.27°E, alt. 143 m, 8.IX.2013, leg. Chen Xiaohua, genitalia slide no. SYSU0180, molecular voucher no. LEP0096 .

Diagnosis.

The wing shape of Loxoneptera medialis is similar to L. rectacerosa but can be distinguished by the light yellow forewing and costal margin. In the male genitalia, it can be distinguished by longer spinous process on dorso-distal sella, distal end of phallus with a small and pointed spine, and vesica with two groups of short, spine-shaped cornuti.

Redescription.

Head. Frons pale yellow, with white lateral bands. Vertex pale yellow. Labial palpus pale yellow, with white scales on ventral side. Maxillary palpus pale yellow, mixed with white scales, broadened distally with scales. Antennae yellowish brown. Thorax. Dorsal side, patagia and tegula yellowish brown, ventral side grey white. Legs yellowish white. Wings. Wingspan 25.0-30.0 mm. Forewing pale yellow, costal and terminal areas reddish brown; orbicular stigma weak, dark brown, reniform stigma weak, black-brown, appearing as a thick line on discocellulars; a weak, dark-brown stripe appearing between M2 and CuA1; fringe black-brown. Hindwing pale yellow, termen mixed with brown scales, without pattern. Underside of forewing pale yellow, without any spot. Abdomen. Dorsal side of abdomen black-brown, ventral side grey white; sternite VIII in male slightly sclerotised with bifurcate anterolateral processes.

Male genitalia (Fig. 21 ). Uncus long and slender, distally narrowly rounded, with few hair-like setae. Saccus rounded. Dorsal projection of transtilla relatively slender and slightly curved, approximately as long as length of costa, distally bearing hair ~ 1/3 length of projection, basal 1/3 broad. Valva with dorsal margin slightly convex, ventral margin sinuated, apex slightly pointed; costa slightly curved; dorsal sella appearing as a broad, slightly curved and stick-like sclerite, with several setae; ventral sella sclerotised, with a long, straight and stick-like process, narrow and pointed apically, apex slightly curved; dorso-distal sella with a pointed, hook-like, and strongly sclerotised process, as long as the process on ventral sella. Sacculus broad. Juxta with basal part narrow, two arms long and slender, pointed apically. Phallus short, basal 1/2 broad, distal end with a small pointed spine, and vesica with two groups of short, spine-shaped cornuti.

Female genitalia (Fig. 28 ). Anterior apophyses 1.5 × as long as posterior apophyses; lamella postvaginalis trapezoidal and strongly sclerotised, with distinct transversely wrinkles, covered with dense and tiny spines; lamella antevaginalis strongly sclerotised, appearing as a small, triangular sclerite, covered with many dense and tiny spines. Antrum strongly sclerotised, cup-shaped; colliculum well developed and strongly sclerotised; ductus bursae short and stout, ~ 1/2 length of corpus bursae; corpus bursae oval, signum weak, reduced into a long carina, laterally bearing with some tiny spines, without appendix bursae.

Distribution.

China (Guangdong, Hainan).

Figures

Figures 2 - 9. Adults of Loxoneptera spp. 2 L. hampsoni nom. nov., male (Tibet) 3 L. hampsoni nom. nov., female (Hainan) 4 L. albicostalis, male (Yunnan) 5 L. crassiuncata sp. nov., paratype, male (Yunnan) 6 L. carnealis, male (Yunnan) 7 L. triangularis sp. nov., holotype, male (Yunnan) 8 L. rectacerosa sp. nov., holotype, male (Yunnan) 9 L. medialis, male (Guangdong). Scale bars: 5.0 mm.

Figures 20 - 25. Male genitalia of Loxoneptera spp. 20 L. rectacerosa sp. nov., Yunnan (genitalia slide no. ZDD 12059) 21 L. medialis, Guangdong (genitalia slide no. SYSU 0987) 22 L. pentasaris, India (Pyralidae Brit. Mus. Slide No. 9747) 23 L. bipunctalis, India (Pyralidae Brit. Mus. Slide No. 9750) 24 L. brevipalpis, India (Pyralidae Brit. Mus. Slide No. 9748) 25 L. dichroma, India (Pyralidae Brit. Mus. Slide No. 9749). Scale bars: 1.0 mm.

Figures 26 - 28. Female genitalia of Loxoneptera spp. 26 L. hampsoni nom. nov., Hainan (genitalia slide no. SYSU 0991) 27 L. carnealis, Yunnan (genitalia slide no. SYSU 0985) 28 L. medialis, Guangdong (genitalia slide no. SYSU 0990). Scale bars: 1.0 mm.