Homaloxestis trapezialis 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 : 592-594

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.3796627
persistent identifier	https://treatment.plazi.org/id/0391B245-9F5D-C833-FF90-FD94FC4AFDB8
treatment provided by	Plazi
scientific name	Homaloxestis trapezialis Yu et Wang
status	sp. nov.

Treatment

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

( Figs 2 View FIGURES 1–4 , 6 View FIGURES 5–8 , 10 View FIGURES 9–12 , 14 View FIGURES 13–16 , 18 View FIGURES 17–20 )

Type material. CHINA, Hubei Province: Holotype ♂, Duchuan Village (31°89′N, 110°71′E), Fang County, 793 m, 19.VII.2017, leg. Wanding Qi et al., slide No. YS19342. Paratypes: 2♀, same data as holotype, slide Nos. YS19343, YS19399.

Diagnosis. This species is similar to H. briantiella ( Turati, 1879) in the male genitalia, but it can be distinguished from the latter by the rectangular process on the ventral margin of the valva, and the juxta concave in U shape medially on the posterior margin in the male genitalia, and the ductus bursae shorter than the corpus bursae in the female genitalia; whereas in H. briantiella , the process on the ventral margin of the valva is triangular, the juxta is semicircularly concave on the posterior margin ( Gozmány 1978: Taf. 19, Fig. 7 View FIGURES 5–8 ), and the ductus bursae is longer than the corpus bursae ( Gozmány 1978: Taf. 20, Fig. 11 View FIGURES 9–12 ).

Description. Adult ( Figs. 2 View FIGURES 1–4 , 6 View FIGURES 5–8 ) wingspan 15.0‒16.0 mm. Head greyish brown, laterally with creamy-white scales.Antenna pale orange. Labial palpus with second segment thickened, creamy white on inner surface, brownish yellow on outer surface; third segment slender, as long as second segment, creamy white dorsally, dark brown ventrally. Forewing with costal margin gently arched, apex obtuse, termen oblique; greyish brown, with a creamy-white band running from base to distal 1/4 below costal margin, with rough pale orange scales along distal 1/4 of costal margin; humeral streak dark brown, about 1/5 length of costal margin; all veins free except R 3 stalked with R 4+5 at 1/6 length, R 4 and R 5 stalked for about 3/5 length. Hindwing and fringe greyish brown; vein M 3 stalked with CuA 1 for about 1/4 length. Fore- and midlegs pale orange dorsally, pale brownish yellow ventrally; hindleg pale orange on inner surface, brownish yellow on outer surface, tibia roughly scaled.

Male genitalia ( Fig. 10 View FIGURES 9–12 ). Uncus lobe sub-rectangular, wider than long, shallowly concave on posterior margin, forming short posterolateral lobes. Gnathos with basal plate sub-quadrate; median process broad at base, narrowed to about distal 1/3, then slender, curved ventrad preapically by a right angle. Costal bar uniformly narrow, slightly angled at middle. Valva broad basally, with a rectangular process medially on ventral margin; cucullus slightly wid- ened before rounded apex, with a row of short, strong setae from basal 1/3 to apex above ventral margin; sacculus narrow at base, slightly widened to before middle, then narrowed to ventral process of valva. Juxta slightly widened posteriorly, deeply concave in U shape on posterior margin, forming short posterolateral lobes rounded apically; with small process on outer margin of posterolateral lobe, shorter than posterolateral lobe; small imbricated process at middle on anterior margin. Vinculum triangularly produced anteriorly. Aedeagus slightly curved, shorter than valva, slightly narrowed from middle to obtuse apex; cornuti consisting of two needle-like spines, about 3/5 length of aedeagus.

Seventh sternite ( Fig. 14 View FIGURES 13–16 ). Anterolateral rib thin, not reaching sixth abdominal segment; anterior margin produced medially, forming a trapezoidal process about same length as anterolateral rib.

Female genitalia ( Fig. 18 View FIGURES 17–20 ). Eighth sternite shallowly concave at middle on posterior margin. Apophyses posteriores about twice length of apophyses anteriores. Ductus bursae shorter than corpus bursae, partly sclerotized posteriorly; ductus seminalis slender, arising from anterior 1/4 of ductus bursae. Corpus bursae large elliptical; signum longitudinally elongated, rod-like, about 1/3 length of corpus bursae, with dense denticles, located posteriorly.

Distribution. China (Hubei).

Etymology. The specific epithet is derived from the Latin trapezialis , referring to the anterior margin of the seventh sternite in male produced to a trapezoidal process medially.