Homaloxestis rotundisigna Yu et Wang, 2020

Yu, Shuai & Wang, Shuxia, 2020, Three new species of the genus Homaloxestis Meyrick, 1910 (Lepidoptera Lecithoceridae) from China, Zootaxa 4767 (4), pp. 589-597 : 594-596

publication ID	https://doi.org/ 10.11646/zootaxa.4767.4.8
publication LSID	urn:lsid:zoobank.org:pub:D5E68ACA-4203-4BF5-A64C-4FB762DFF6C9
DOI	https://doi.org/10.5281/zenodo.3796623
persistent identifier	https://treatment.plazi.org/id/0391B245-9F5B-C831-FF90-F9BEFDA4FB01
treatment provided by	Plazi
scientific name	Homaloxestis rotundisigna Yu et Wang
status	sp. nov.

Treatment

Homaloxestis rotundisigna Yu et Wang View in CoL , sp. nov.

( Figs 4 View FIGURES 1–4 , 8 View FIGURES 5–8 , 12 View FIGURES 9–12 , 16 View FIGURES 13–16 , 20 View FIGURES 17–20 )

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 View FIGURES 1–4 ).

Description. Adult ( Figs. 4 View FIGURES 1–4 , 8 View FIGURES 5–8 ) 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 View FIGURES 9–12 ). 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 View FIGURES 13–16 ). 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 View FIGURES 17–20 ). 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.