Udea curvata, Zhang, Dandan & Li, Jinwei, 2016

Zhang, Dandan & Li, Jinwei, 2016, Two new species and five newly recorded species of the genus Udea Guenee from China (Lepidoptera, Crambidae), ZooKeys 565, pp. 123-139 : 129

Taxon classification Animalia Lepidoptera Crambidae

Udea curvata sp. n. Figs 1, 4

Type-locality.

China, Tibet, Milin, Paizhen, 29°30'N, 94°51'E, 2961 m, 2-VII-2013, coll. Jinwei Li.

Type material.

Male holotype, China: Tibet: Paizhen, Milin, 29°30'N, 94°51'E, 2961 m, 2-VII-2013, coll. Jinwei Li, genitalia slide no. LJW12172 (SYSBM); Paratypes. 3♂, China: Tibet: Paizhen, Milin, 29°30'N, 94°51'E, 2961 m, 2-3-VII-2013, coll. Jinwei Li, genitalia slides no. LJW12248, LJW12267 (SYSBM). Additional material. 1 abdomen missing, China: Tibet: Paizhen, Milin, 29°30'N, 94°51'E, 2961 m, 2-VII-2013, coll. Jinwei Li.

Diagnosis.

This species is similar to Udea decrepitalis and Udea elutalis with zigzaggy serrated postmedian line and darker postmedian area of forewing, but can be distinguished in: fibula claw-shaped, bent, with point apex; phallus with a thumb-shaped cornutus. Differs from Udea decrepitalis also by colouration of forewing stigmata identical with ground colour. Udea curvata is similar to Udea conubialis in male genitalia, but can be distinguished in: wingspan 25.5-28.5 mm, ground colour yellow, postmedian line zigzaggy, proximal cellular stigma distinct, fibula strongly bent. Udea curvata similar to Udea lutealis with yellow ground colour and colouration of forewing stigmata identical with ground colour, but can be distinguished by bent fibula extending ventro-distally, juxta bifid ventrally, phallus with a thumb-shaped cornutus, posterior phallus with granulated area not sclerotised, and lacking projecting denticulate ridge most posteriorly.

Description.

Male (Fig. 1). Wingspan 25.5-28.5 mm. Frons yellowish-brown, with white lateral band not extending to anterior end, and a faint, short middle band. Vertex pale yellowish-brown. Labial palpus slightly upturned obliquely, third segment porrect; length about 2.5 times diameter of eye; yellowish-brown, contrastingly white at base ventrally. Maxillary palpus yellowish-brown, with a brush of scales. Basal scaling of proboscis white. Antenna with yellowish-brown scales dorsally. Thorax and abdomen yellow dorsally, dirty white ventrally. Legs creamy white, foreleg inner side dark yellowish.

Forewing yellow, scattered with brown scales, markings grey-brown; antemedian line from costal 1/4 sinuated to 1/3 posterior margin; proximal cellular stigma circular; distal cellular stigma kidney-shaped; postmedian line zigzaggy serrate, from costal 3/4, excurved around cell, and strongly inflexed below distal cellular stigma, then to 2/3 on posterior margin; postmedian area strongly dusted with grey and alternately formed grey and yellow streaks; vein ends on wing margin each with a small brown dot; fringe yellow, basal 1/4 grey. Hindwing pale yellow, a darker steak at anterior angle and a blackish dot at posterior angle of cell; postmedial line grey-brown, zigzaggy serrate, with anterior 1/4 most distinct; postmedian area similar to forewing, marginal line and fringe as forewing, paler at tornus area.

Male genitalia (Fig. 4). Uncus inverted T-shaped, with base expanded, apex bulbous and setose dorso-laterally. Pseudognathos slender and ribbon-like, semicircular produced medially. Triangular transtilla connected. Valva narrow and long, costa nearly straight, proximal half of costa twice as broad as distal half, ventral margin broadly sinuate basally, with a stout tip protruding proximal of the distal end of sacculus, nearly parallel to costa from middle to end; fibula claw-shaped, bent ventro-distally, with point apex. Saccus inflated, ventrally keeled. Juxta nearly circular, somewhat bifid ventrally, dorsal edge serrated. Phallus cylindrical, with a short coecum, with a thumb-shaped cornutus, posterior phallus with granulated vesica.

Female unknown.

Distribution.

China (Tibet).

Etymology.

The specific name is derived from the Latin curvata = curved, referring to the curved fibula.