Frisilia trisigna, Yu & Wang, 2021

Yu, Shuai & Wang, Shuxia, 2021, Three new species and one newly recorded species of genus Frisilia Walker (Lepidoptera, Lecithoceridae) from China, with a checklist of the world, Zootaxa 4926 (1), pp. 65-78 : 71-74

publication ID	https://doi.org/ 10.11646/zootaxa.4926.1.4
publication LSID	lsid:zoobank.org:pub:64BEC15C-5E2A-4FB5-815B-1ABD7E9D5062
DOI	https://doi.org/10.5281/zenodo.4532519
persistent identifier	https://treatment.plazi.org/id/B20E881F-AD07-4FD0-A853-C5E60B90389D
taxon LSID	lsid:zoobank.org:act:B20E881F-AD07-4FD0-A853-C5E60B90389D
treatment provided by	Plazi
scientific name	Frisilia trisigna
status	sp. nov.

Treatment

Frisilia trisigna View in CoL sp. nov.

( Figs 9 View FIGURES 6‒9 , 13, 16 View FIGURES 10‒16 , 20 View FIGURES 17‒20 , 23 View FIGURES 21‒23 )

urn:lsid:zoobank.org:act:B20E881F-AD07-4FD0-A853-C5E60B90389D

Type material. CHINA, Yunnan: Holotype ³, Gaoligong (27º42′N, 98°16′E), Nujiang, 380 m, 28.V.2017, leg. KJ Teng et al., slide No. YS 19065 GoogleMaps . Paratypes: 2³ 3♀, same data as holotype except dated 29.V‒1.VI.2017, slide Nos. YS 19066 ♀, YS20015 ♀, YS20018 ♀, YS20019³ GoogleMaps .

Diagnosis. The new species is diagnostic in the male genitalia by the horn-shaped ventrobasal process of the cucullus longer than its basal width, the posterior margin of the juxta produced to an upright process at lateral side of the median notch, and in the female genitalia by the corpus bursae with three signa. It is similar to F. basistricta sp. nov. and F. motuoensis sp. nov., and the differences between them are stated in the diagnosis of the latter species respectively.

Description. Adult ( Figs 9 View FIGURES 6‒9 , 13, 16 View FIGURES 10‒16 ). Wingspan 19.0‒19.5 mm.

Head: pale yellow. Antenna pale yellow; scape yellowish brown on posterior margin, with a yellowish-brown scale tuft at base dorsally; flagellum with basal 1/6 yellowish brown on posterior margin, with appressed elongate scales dorsally, remaining part ringed with dark brown. Labial palpus in male orange white mixed with yellowish brown, greyish black distally; in female second palpomere pale yellow on inner surface, yellowish brown on outer surface, third palpomere pale yellow dorsally, dark brown ventrally.

Thorax: Thorax and tegula yellowish brown, mixed with dark brown scales. Forewing with costal margin slightly arched, apex obtusely produced, termen concave below apex; ground color whitish orange, with scattered dark brown scales, brownish yellow on tornal area; humeral streak dark brown, about 1/4 length of costal margin; discal and discocellular stigmata blackish brown; subdorsal groove covered with yellowish-brown scales; fringe pale yellowish brown; R 5 to termen, R 5 stalked with R 4, R 4+5 about 2/5 length of R 5, R 4+5 stalked with R 3, R 3+4+5 slightly longer than R 3, M 1 close to R 3+4+5 at base, M 2 and M 3 coincident, CuA 1 and CuA 2 separated. Hindwing and fringe grey; fringe with basal line orange white; M 2 present, M 3 and CuA 1 stalked, M 3 +CuA 1 nearly as long as CuA 1. Legs pale yellow dorsally, dark brown ventrally except pale yellow at apex of each tarsomere.

Male genitalia ( Fig. 20 View FIGURES 17‒20 ). Uncus widened posteriorly, concave at middle on posterior margin; caudal lobe rounded apically, extending obliquely outward. Gnathos with basal plate slightly produced at middle on posterior margin; median process wide at base, narrowed to basal 3/5, abruptly tapered from distal 2/5 to apex, bent ventrad at distal 2/5 almost at a right angle. Valva broad and parallel-sided basally, narrowed to cucullus; cucullus widened to before broadly obtuse apex, nearly straight on costal margin, setose distally, with a horn-shaped process longer than its basal width on ventral margin; costal bar narrow, triangularly produced before middle on dorsal margin; sacculus wide in basal half, tapered to apex, reaching cucullus apically. Vinculum obtusely rounded anteriorly. Juxta shieldshaped, posterior margin sclerotized, notched at middle, produced to an upright process at lateral side of notch, anterior margin with a small sub-triangular process at middle; posterolateral lobe sub-triangular, extending outward. Aedeagus shorter than valva, tubular in basal 2/3, tapered from distal 1/3 to obtuse apex, slightly curved; cornuti consisting of two horns, each with an ovately dilated basal plate, cornutus near base serrate basally.

Female genitalia ( Fig. 23 View FIGURES 21‒23 ). Eighth abdominal sternite concave at middle on posterior margin. Apophyses posteriores slightly shorter than twice length of apophyses anteriores. Antrum short, wider than long, spiculose ( Fig. 23a View FIGURES 21‒23 ). Ductus bursae narrow, shorter than corpus bursae; ductus seminalis much slender, arising from corpus bursae posteriorly. Corpus bursae ovate, posteriorly with dense spines joined or separated at base; with three signa: first sub-rounded, with a horizontal ridge, placed posteriorly; second large, sub-rectangular, widened posteriorly in one individual ( Fig. 23b View FIGURES 21‒23 ), about 2/5 length of corpus bursae, dorsal surface above anterior margin with a row of pectinations varied greatly in size and shape; third much smaller than second, densely denticulate, placed at middle on ventral surface, overlapped with second signum.

Distribution. China (Yunnan).

Etymology. The specific epithet is derived from the Latin tri- and signum, referring to the corpus bursae with three signa in the female genitalia.