Thiotricha robustiseta, Lee & Li, 2024

Lee, Ga-Eun & Li, Houhun, 2024, A taxonomic review of Thiotricha Meyrick, 1886 (Lepidoptera, Gelechiidae, Thiotrichinae) from China, with descriptions of 84 new species, Zootaxa 5449 (1), pp. 1-222 : 83-84

publication ID	https://doi.org/ 10.11646/zootaxa.5449.1.1
publication LSID	lsid:zoobank.org:pub:CAC513A2-D2B4-4E6E-BAB6-CCE6E054680F
DOI	https://doi.org/10.5281/zenodo.11233079
persistent identifier	https://treatment.plazi.org/id/03CC3667-9869-1D2C-FF05-88C0DC42E612
treatment provided by	Plazi
scientific name	Thiotricha robustiseta
status	sp. nov.

Treatment

Thiotricha robustiseta sp. nov.

( Figs 12E View FIGURE 12 , 25K View FIGURE 25 , 37C View FIGURE 37 )

Type material. Holotype ♂, CHINA, Hainan Province, Wuzhishan Nature Reserves (18.88°N, 109.65°E), 742 m, 21.v.2015, leg. Peixin Cong, Wei Guan and Sha Hu, genitalia slide no. LGE18343 GoogleMaps . Paratype. CHINA: Hainan Province: 1 ♂, Yaxing Village (19.02°N, 109.40°E), 321 m, Nankai Town , Baisha County, 21.vi.2015, leg. Peixin Cong, Wei Guan and Sha Hu, genitalia slide no. LGE18344 GoogleMaps .

Diagnosis. This new species is easily distinguished from congeners by the forewing with contrasting light base and dark distal 2/3. The male genitalia of T. robustiseta are diagnosed by the elliptical anellus lobe bearing a robust bristle at the subapex, the uniformly elongate valva and the very short saccus. The male sternum VIII is unique as the posterior margin is broad and serrate whereas many other species have a bifurcate posterior apex.

Description. Adult ( Fig. 12E View FIGURE 12 ). Wingspan 9.0−10.0 mm. Head cream. Labial palpus cream; in male segment I long, fuscous on outer surface; segment II as long as I, fuscous in basal half of outer surface, hair pencil nearly reaching apex of III; segment III 1.5 time longer than II, tipped fuscous. Antenna with scape cream; flagellum fuscous except basal 2/3 of dorsal surface fuscous, male cilia as long as diameter. Thorax cream, tinged with fuscous posteriorly. Tegula cream, fuscous along inner and anterior margins. Forewing dark brown except basal 1/3 cream, dorsum broadly cream, apical area brown; apical spot round, apex falcate; markings cream: from distal 1/2 and 1/4 of wing, two outwardly oblique costal streaks shortly running toward termen, second streak narrower, meeting grey scaling at half way across wing; below the first costal streak, a short streak from upper angle of discal cell, running toward second costal streak; an outwardly oblique streak from distal 1/3 above fold, running toward apex and almost confluent with former streak distally; tornal streak short, inwardly oblique, running toward second costal streak but interrupted by grey scaling at half way across wing; an irregular dark brown marking at basal 1/3 between fold and dorsum, broadened near dorsum; fringe on apical area dark fuscous with a median creamy band, on termen dark fuscous except base cream, on dorsum fuscous strongly mixed with cream basally. Hindwing fuscous except subapex cream and apex black; fringe fuscous except apical area cream with a terminal black band. Legs cream; fore femur, tarsus and tibia dark fuscous on outer surface; mid tibia with an oblique dark fuscous streak beyond middle; hind tibia with an oblique dark fuscous streak before apex; mid and hind tarsi with each tarsomere dark fuscous on outer surface except apex.

Male sternum VIII ( Fig. 25K View FIGURE 25 ). Broad, sub-trapezoidal, approximately 1/6 length of abdomen; posterior apex broad, nearly straight, serrate except middle.

Male genitalia ( Fig. 37C View FIGURE 37 ). Uncus broad, tongue-shaped. Gnathos hook simple, long. Tegumen 3 times as long as uncus. Valva slender, uniformly elongate from base to apex, setose in distal 2/5, rounded apically. Anellus lobe large, elliptical, approximately 1/3 length of valva, sparsely setose along ventral margin; subapex with a robust bristle, slightly shorter than anellus lobe, curved inward; apical bristle very short, usually indistinct. Juxta with a hummock-like process at middle. Vinculum with posterior margin produced at middle. Saccus very short, broad at base, abruptly narrowed apically.Aedeagus short, with basal 3/4 dilated, slightly constricted at distal 1/4, broadened and truncate apically; a slender projection arising from apex on dorsal margin.

Female unknown.

Distribution. China (Hainan).

Etymology. The species name is derived from Latin, robustus (robust) and seta (seta), referring to the robust subapical bristle on the anellus lobe.