Dichomeris spinosella Park & Bae & Zhao & Li 2020, sp. nov.
Creators: name: Park, Kyu-Tek
name: Bae, Yang-Seop
name: Zhao, Shengnan
name: Li, Houhun
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Gelechiidae
Dichomeris
Dichomeris spinosella

description: Dichomeris spinosella Park & Li, sp. nov.
urn:lsid:zoobank.org:act: 392AAB2C-C67F-46D9-966A-5CD6E51DBD91
(Figs 27, 45, 54)
Type material. Holotype ♂, VIETNAM: Ninh Binh Prov.: Cuc Phuong Nat. Park, 200 m, 23 iv 2006, leg. Park, Kim & Kang, gen. slide no. nklep003, in NIBR. Paratypes: VIETNAM: Ninh Binh Province: 2♂, same as holotype; 2♂, same locality as holotype, Bong, 450 m, 24 iv 2006, leg. Park, Kim & Kang; 4♂, same locality as holotype, 300 m, 30 iv–01 v 2005, leg. KT Park & SR Kim, gen. slide no. nklep004; Vinh Phuc Province: 1♀, Tam Dao Nat. Park, 450 m, 27 iv 2006, leg. Park, Kim & Kang, gen. slide no. CIS-6287, in NIBR. CHINA: Hainan Province: 1♀, Diaoluoshan Nature Reserves (18.43°N 109.52°E), 922 m, 26.i.2015, leg. P Cong, W Guan and S Hu, gen. slide no. ZSN16242; 1♀, Bawangling (19.12°N 109.09°E), Changjiang County, 193 m, 11 iv 2018, leg. P Liu, X Bai & S Yu, in NKU.
Description. Adult (Fig. 27). Wingspan 17.0–18.0 mm. Head dark brown dorsally, with yellowish erect scales laterally; frons pale gray. Ocellus absent. Antenna with scape dark brown on dorsal surface, yellowish white on ventral surface; flagellum alternately dark brown and yellowish brown on dorsal surface, pale yellow on ventral surface, ciliate. Second segment of labial palpus dark brown on outer surface, pale yellow on inner surface, with grayish white-tipped triangular scale tuft dorsally; 3rd segment smoothly scaled, longer than 2nd segment, pale yellow, dark brown on ventral surface. Thorax and tegula dark gray; mesothorax with golden hair pencils arising from anepisternum in male. Fore- and midleg dark brown on outer surface; hindleg grayish yellow with tibia clothed with long, grayish-yellow scales. Forewing gradually broadened distally; ground color pale yellow, scattered with brownish scales; discal and discocellular spots well-developed, dark brown, rounded and ill-defined plical spot placed at middle of fold; costa with dark-brown narrow streak from base extended to near 2/5 and pale-yellow narrow band along costal margin, abruptly oblique from prior to apex; ill-defined dark-brown fascia arising from 4/5 of costa extended to near tornus; apex blunt; termen oblique; fringe concolroue with narrow pale yellow basal line. Hind wing broader than forewing, dark grayish brown; fringe concolrous with ground color.
Male genitalia (Fig. 45): Uncus subquadrate, with rounded posterior margin; anterior margin concave in semicircle. Gnathos strongly bent before middle, sharp at apex; culcitula rounded, densely spined. Valva longer than tegumen plus uncus, narrowed at base, broader toward apex; apex rounded; free ventral lobe digitate, about 1/4 length of valva, dentate marginally. Vinculum about equal to the length of tegumen plus uncus; lateral lobes very short, more or less triangular, with dentate margin sparsely setose, arising from basal 1/4 of lateral arms, shorter than 1/7 of arm. Saccal region broad, slightly concave at middle anteriorly. Sicae with uniquely developed lobes; left lobe hook-shaped apically, strongly bent at distal 1/3, reaching base of vinculum, with another shorter lobe directing to base outwardly; right lobe straight, about 2/5 the length of left one, fused in basal 1/3, then bifurcated in U shape. Aedeagus shuttle-shaped, rounded at base, sharply produced apically. broadest at zone; cornutus sickle-shaped, heavily sclerotized, about 1/3 the length of aedeagus.
Female genitalia (Fig. 54): Apophyses anteriores about 1/3 the length of apophyses posteriors, inflated basally. Eighth sternite nearly straight on posterior margin. Antrum inverted trapeziform, weakly sclerotized. Ductus bursae short, broad, with complex of irregularly modified heavily sclerotized plates; left side with a short, triangular process and right side with a sword-like sclerotized plate extending to basal 2/5 of corpus bursae, forming an inverted U-shaped anterior margin between them; ductus seminalis arising from right side distally. Corpus bursae large, ovate; signum rounded, placed at anterior 1/3 ventrally, regions around signum with dense spines; accessory bursa arising from middle of signum.
Distribution. China (Hainan), Vietnam (Ninh Binh, Vinh Phuc).
Diagnosis. The new species can be distinguished from congeners by the forewing with abruptly oblique apically. The forewing pattern is more or less similar to D. longivalvata sp. nov., but it can be easily distinguished from the latter by the unique shape of apical region of the forewing. The male genitalia are similar to those of D. christophi Ponomarenko & Mey, 2002, but it can be separated from the latter by the different shape of sicae, with left lobe hook-shaped and right lobe bifurcated apically. The shape of sicae are slightly variable as illustrated in Fig. 46 (holotype) and Fig. 47 (paratype).
Etymology. The specific name is derived from the Latin, spinosus (= spinose), with a Latin dimunitive suffix, - ellus, referring to the sicae with a spinous process on inner margin.
description: Published as part of Park, Kyu-Tek, Bae, Yang-Seop, Zhao, Shengnan & Li, Houhun, 2020, Thirteen new species of genera Dichomeris Hübner, 1818 and Helcystogramma Zeller, 1877 (Lepidoptera, Gelechiidae, Dichomeridinae) with twenty-one newly recorded species from Vietnam, pp. 435-461 in Zootaxa 4821 (3) on pages 444-445, DOI: 10.11646/zootaxa.4821.3.2, http://zenodo.org/record/4400933