Tylostega lata Du & Li, sp. nov.
Creators: name: Du, Xicui
name: Li, Houhun
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Crambidae
Tylostega
Tylostega lata

description: Tylostega lata Du & Li, sp. nov.
(Figs. 4, 11, 16, 21)
Type specimens. Holotype ɗ, CHINA: [label 1] “Médog County (29°13' N, 95°18' E), Xizang (Tibet) Autonomous Region / 880 m elev. / 16. VIII. 2003 / leg. Xinpu Wang & Huaijun Xue”; [label 2] “genitalia slide ɗ / DXC07043”; [label 3, red] “ Holotype ɗ / Tylostega / lata / Du et Li”. Paratypes: 1 ɗ, 1 Ψ, other same data as holotype.
Diagnosis. This species is very similar to T. luniformis sp. nov. in appearance, but can be separated by the dorsal margin of the sacculus inflated triangularly at basal 2/3; the juxta with a strong finger­like process posterolaterally; the phallus with a protrusion distally and with two spine­like cornuti and one broadly board­like cornutus bearing weak teeth. In T. luniformis sp. nov., the dorsal margin of the sacculus is not inflated triangularly at basal 2/3; the juxta has a strong horn­like process mediolaterally; the phallus has two spinelike and one luniform cornuti, and bears no protrusion distally.
Description. Adult (Fig. 4). Wing span 19.0–21.0 mm. Frons yellowish­white except fuscous anteriorly. Antenna with ventral cilia about 1.5 times length flagellomere diameter in male, and about as long as in female. Labial palpus yellowish­white, 2nd segment brown or fuscous dorsally and distally, 3rd segment diffused with a few brown scales laterally. Thorax yellowish­white dorsally, each segment with a fuscous blotch. Patagium and tegula yellowish­white, diffused with brown. Forewing pale yellow diffused with brown, with fuscous patches at base, discoidal stigma and lines blackish­fuscous; lines forming blackish­fuscous spots on costa; postmedial line sinuated as in T. pectinata, distinct on costa only; a series of blackish­fuscous spots along terminal margin. Hindwing yellowish­white, with large fuscous patch at base, suffused with brown in distal half; discoidal stigma dark fuscous, claviform; terminal margin with some inconspicuous fuscous spots. Cilia of both fore­ and hindwings light brownish­yellow, paler distally. Abdomen with 1st segment white with fuscous transverse patches, 2nd–5th segments blackish­fuscous, 6th–8th segments pale yellow dorsaly; ventral surface yellowish­white, diffused with brown.
Male genitalia (Figs. 11, 16). Uncus with height greater than basal width. Valva narrower, its dorsal and ventral margins nearly parallel; with large, median, irregular quadrangular projection bearing small dense spines anteriorly. Sacculus inflated triangularly at basal 2/3 on dorsal margin, narrowed at subapex; distal part inflated triangularly, with small flat process. Saccus oval. Juxta circular, with strong finger­like process posterolaterally. Phallus with protrusion distally, with two spine­like cornuti and one broad, board­like cornutus with weak teeth.
Female genitalia (Fig. 21). Apophysis anterioris about 1.5 times length of apophysis posterioris. Ductus bursae wide, contorted, more thickly sclerotized than middle portin of corpus bursae. Corpus bursae narrowly elongate, appreciably broader than ductus bursae, 3 times as long as ductus bursae, and slightly broadened anteriorly.
Distribution. China (Tibet).
Etymology. The specific name is derived from the Latin latus = broad, in reference to the broad, boardlike cornutus.
description: Published as part of Du, Xicui & Li, Houhun, 2008, A review of Tylostega Meyrick from Mainland China (Lepidoptera, Crambidae, Spilomelinae), with descriptions of four new species, pp. 51-61 in Zootaxa 1681 on pages 58-60, DOI: 10.5281/zenodo.180403