Dichomeris myriaodontosa 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 myriaodontosa

description: Dichomeris myriaodontosa Park & Li, sp. nov.
urn:lsid:zoobank.org:act: E16BD81A-299C-45D7-AD36-1B05B01880EA
(Figs 21, 42, 53)
Type material. Holotype ♂, VIETNAM: Vinh Phuc Prov.: Tam Dao Nat. Park, 950 m, 26 iv 2006, leg. Park, Kim & Kang, gen. slide no. CIS-6675, in NIBR. Paratypes: VIETNAM: Ninh Binh Province: 2♂, 1♀, Cuc Phuong Nat. Park, 450 m, 24 iv 2006, leg. Park, Kim & Kang, gen. slide nos. CIS-6251(♂), nklep048(♂), & nklep061(♀). All types in NIBR.
Description. Adult (Fig. 21). Wingspan 14.0–15.0 mm. Head yellowish brown dorsally, with yellowish scales laterally; frons grayish brown. Ocellus absent. Antenna with scape dark brown dorsally, yellowish white ventrally; flagellum yellowish brown with dark-brown annulations, ciliate ventrally. Second segment of labial palpus dark brown on outer surface, grayish yellow on inner surface, clothed with rough scales; 3rd segment equal to length of second segment, dark brown, clothed with rough scales, yellow white apically. Thorax dark brown mesially, with yellowish scales laterally; tegula dark brown anteriorly, yellowish in distal half; mesothoracic anepisternum with pale-yellow hair-pencils in male. Fore- and midleg dark brown on outer surface, grayish on inner surface; hindleg pale yellow, mixed with brown scales on outer surface. Forewing slightly dilated distally; ground color pale yellow, irregularly scattered with dark-brown scales, especially in basal half and along fold; with an obscure longitudinal brownish streak from middle of cell to termen; costa slightly arched medially; apex obtuse; termen oblique, slightly concave before middle, scattered with dark-brown scales along termen; fringe pale yellow in basal 3/4, brown beyond along termen, brown around tornus. Hind wing brownish gray; fringe concolorous with ground color.
Male genitalia (Fig. 42): Uncus narrowed in basal half, inflated distally, with rounded posterior margin; anterior margin concave in triangular. Gnathos long, slender, bent from before middle, with acute apex; culcitula semicircular, spinous. Valva longer than the length of tegumen plus uncus, bent medially, parallel-sided in basal half, slightly dilated in distal half, rounded apically; valvella about 1/4 the length of valva, clavate, setose in distal half. Setose patch short, columnar, dilated disally. Vinculum about equal to the length of tegumen plus uncus, broad in basal 3/5; lateral lobes arising from distal 2/5 of vinculum, about 3/5 the length of vinculum, apex truncate. Saccal region broad, nearly straight on anterior margin. Sicae fused for short distance, asymmetrical: left lobe about 3/5 length of vinculum, truncate on apex with sharply produced process outwardly; right one shorter, about 2/5 length of vinculum, bifurcate into V-shape apically. Aedeagus shuttle-shaped, long, about equal length to saccus plus uncus, broad in basal zone; two sclerotized, asymmetrical lobes arising from zone: left one about 1/4 length of aedeagus, dentate on inner margin, blunt at apex; right one longer than left one, bifurcate in distal 2/3, dentate on inner margin, blunt at apex.
Female genitalia (Fig. 53): Apophyses anteriores about 1/4 length of apophyses posteriores. Eighth sternite with nearly straight posterior margin and roundly concave on anterior margin. Antrum membraneous. Ductus bursae with heavily sclerotized complex of various shapes of plates, left one extended 1/3 to posterior of corpus bursae, excurvate near apex. Corpus bursae large, ovate, densely spinous on inner surface anteriorly; signum composed by several strong spicules placing near anterior margin medially; accessory bursa arising from middle of signum.
Distribution. Vietnam (Vinh Phuc, Ninh Binh).
Diagnosis. This species is superficially similar to Dichomeris aculata Park, 2001 in the male genitalia, but it can be separated from the latter by having teeth on the ventral surface of the sicae, with different shape of sclerotized lobe in the aedeagus, whereas in D. aculata the sicae are smooth on the ventral surface. The female genitalia differ from those of the latter by having semicircular sclerotized plate in the ductus bursae, but the ductus bursae of the latter has no similar sclerotized plate.
Etymology. The specific name is derived from the Greek, -myria (= many) and -odontos (= tooth), referring to the sicae having several teeth on the ventral surface.
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 page 441, DOI: 10.11646/zootaxa.4821.3.2, http://zenodo.org/record/4400933