Homaloxestis rotundisigna Yu et Wang 2020, sp. nov.
Creators: name: Yu, Shuai
name: Wang, Shuxia
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Lecithoceridae
Homaloxestis
Homaloxestis rotundisigna

description: Homaloxestis rotundisigna Yu et Wang, sp. nov.
(Figs 4, 8, 12, 16, 20)
Type material. CHINA, Xizang [Tibet] Autonomous Region: Holotype ♂, Tongmai Town (30°06′N, 95°05′E), Bomi County, 2029 m, 14.VIII.2018, leg. Mujie Qi, slide No. YS19394. Paratypes (1♂, 4♀): 4♀, same data as holotype except dated 12‒16.VIII.2018, slide Nos. YS19395, YS19397; 1♂, Gongxiang, Bomi County, 2230 m, 4.VIII.2017, leg. Mujie Qi & Xiaofei Yang, slide No. YS19323.
Diagnosis. This species is similar to H. stenopteryx Wu, 2005 in the male genitalia by sharing a valva that is narrowed distally and rounded apically, but it can be distinguished from the latter by the nearly straight costal bar and the sub-crescent cornuti of the aedeagus in the male genitalia; whereas in H. stenopteryx, the costal bar is angled and the cornuti are sagittate (Wu 2005: 270, Fig. 3).
Description. Adult (Figs. 4, 8) wingspan 13.5‒16.5 mm. Head dark brown. Antenna pale orange. Labial palpus pale orange except dark brown ventrally on third segment; second segment thickened; third segment slender, as long as second segment. Thorax and tegula dark brown. Forewing with costal margin slightly arched, apex obtuse, termen shallowly concave; dark brown, mixed with brownish yellow; fringe dark brown; basal line orange white; all veins free except R 4 and R 5 stalked for about 3/5 length. Hindwing pale brownish yellow, with a bundle of long, fluffy hairs at base; fringe yellowish brown; basal line orange white; vein M 3 stalked with CuA 1 for about 1/5 length. Fore- and midlegs orange white, mixed with dark brown scales on ventral surface; hindleg pale orange on inner surface, mixed with dark brown scales on outer surface, tibia roughly scaled.
Male genitalia (Fig. 12). Uncus lobe transversely elliptical, with a small notch at middle on posterior margin, setose posteriorly, with a narrow V-shaped sclerite anteriorly. Gnathos with lateral arms fused medially and trian- gularly produced posteriorly; median process broad at base, tapered to apex, curved ventrad at distal 1/4. Costal bar nearly straight, narrow basally, widened to cucullus. Valva broad basally, slightly narrowed to cucullus; cucullus slightly narrowed to rounded apex, setose on ventral 2/3, with a densely setose, sub-triangular process at ventrobasal corner and a row of short, strong setae from basal 1/3 to apex above ventral margin; sacculus narrowly banded, reaching cucullus, with a cluster of long setae medially. Juxta sub-quadrate; posterior margin concave at middle, with a large sub-rectangular process posterolaterally, with erect, sub-triangular sclerite along each side of concavity; anterior margin triangularly produced medially. Vinculum roundly produced anteriorly. Aedeagus nearly as long as valva, slightly curved, basal 2/5 narrow, dilated medially, slightly narrowed to apex; cornuti consisting of three subcrescent, dorsally serrate sclerites, located in distal 2/3 of aedeagus.
Seventh sternite (Fig. 16). Seventh sternite transversely banded, wider than long, anterior margin slightly convex; anterolateral and posterolateral ribs represented by short, sub-triangular processes.
Female genitalia (Fig. 20). Eighth sternite shallowly concave at middle on posterior margin. Apophyses posteriores about twice length of apophyses anteriores. Antrum funnel-shaped, its ventral surface with a spinulate semicircular sclerite. Ductus bursae nearly as long as corpus bursae, wrinkled, anterior half dilated; ductus seminalis anterior to middle of ductus bursae, as broad as corpus bursae. Corpus bursae elliptical; signum rounded, located medially, with a horizontal ridge at middle.
Distribution. China (Xizang [Tibet]).
Etymology. The specific epithet is derived from the Latin rotund- and signum, referring to the round signum of the corpus bursae in the female genitalia.
description: Published as part of Yu, Shuai & Wang, Shuxia, 2020, Three new species of the genus Homaloxestis Meyrick, 1910 (Lepidoptera Lecithoceridae) from China, pp. 589-597 in Zootaxa 4767 (4) on pages 594-596, DOI: 10.11646/zootaxa.4767.4.8, http://zenodo.org/record/3774993