Argyresthia (Blastotere) densa Liu, Wang & Li, 2017, sp. nov.
Creators: name: Liu, Tengteng
name: Wang, Shuxia
name: Li, Houhun
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Yponomeutidae
Argyresthia
Argyresthia densa

description: 6. Argyresthia (Blastotere) densa, sp. nov. (Figs. 18, 89, 146, 202, 256)
Description. Adult (Fig. 18) wingspan 11.0 mm. Head white, face tinged with yellowish fuscous. Labial palpus whitish yellow. Antenna with scape pale yellowish fuscous, pecten golden fuscous; flagellum pale yellowish white, ringed with pale fuscous. Foreleg dark fuscous on inner surface, yellow on outer surface; mid- and hindlegs grayish white. Thorax white, tinged with pale yellow; tegula golden yellow. Forewing ratio 4.0; ground color between costa and fold grayish to yellowish fuscous, between fold and dorsum yellowish white; with numerous short transverse dark fuscous striae or dots, becoming sparser towards dorsum; cilia dark fuscous. Hindwing and cilia uniformly gray. Abdomen grayish fuscous dorsally, yellowish fuscous ventrally.
Venation: Forewing with R4 and R5 separate; hindwing with M3 and CuA1 from same point.
Male genitalia (Figs. 89, 146, 202): Tuba analis shorter than width of valva. Socius covered with 17 scale-like setae, bearing a single long seta posteriorly (Fig. 202). Valva widest at basal 1/3, narrowed towards obtuse apex. Saccus triangular, apex narrowly rounded. Phallus straight, 3.7 times as long as width of valva; cornutus 1/3 length of phallus, with about seven strong denticles (Figs. 146, 146 a). Second sternite with about 13 micro-setae in each row; eighth sternite Y-shaped. Coremata present.
Female genitalia (Fig. 256): Ovipositor 2.7 times as long as eighth segment. Anterior apophysis 4/5 length of posterior apophysis, bifurcate at distal 1/3, with branches fused and forming ventral margin of ostium bursae. Lamella postvaginalis hourglass-shaped, slightly concave anteriorly. Antrum funnel-shaped, 3/5 length of eighth segment. Ductus bursae spinulate at opening of ductus seminalis, apparently widened at junction with corpus bursae; ductus seminalis originating from anterior 2/5 of ductus bursae. Corpus bursae nearly round; signum with basal plate consisting of two irregularly rounded patches of denticles, each with a small, more or less round center lacking denticles; horns straight, extending outward almost horizontally, anterior margin nearly straight.
Type material. CHINA: Holotype, Ƌ, Mt. Baotianman (33.52°N, 111.94°E), Neixiang County, Henan Province, 1200 m, 28-v.2006, leg. Xu Zhang and Jinmei Lv, slide no. LTT12228. Paratypes: 7♀, 20, 22̄23, 25, 27, 29̄ 30.v.2006, other same data as holotype, slide nos. LTT12225, LTT12523W.
Other material: 2Ƌ (without abdomen), 25, 29.v.2006, other same data as holotype.
Distribution. China (Henan).
Diagnosis. This species resembles A. (A.) retinella Zeller, 1839 in forewing pattern. It can be distinguished from the latter grayish to yellowish fuscous forewing grounde color between the costa and the fold, yellowish white between the fold and the dorsum; and in the male genitalia by the valva covered with sparse, short setae as indicated in the subgeneric characters, the cornutus with about seven strong denticles, and the Y-shaped eighth sternite, and in the female genitalia by the signum with two horns. In A. (A.) retinella the ground color of the forewing is uniformly white; the valva is covered with dense long setae, the cornutus lacks strong denticles, and the eighth sternite is C-shaped (Fig. 125); and the signum lacks a horn (Fig. 283).
Etymology. The specific name is derived from the Latin densus, meaning dense, referring to the forewing covered with numerous short transverse striae and dots.
description: Published as part of Liu, Tengteng, Wang, Shuxia & Li, Houhun, 2017, Review of the genus Argyresthia Hübner, [1825] (Lepidoptera: Yponomeutoidea: Argyresthiidae) from China, with descriptions of forty-three new species, pp. 1-135 in Zootaxa 4292 (1) on page 20, DOI: 10.5281/zenodo.827746