Thirteen new species of genera Dichomeris Hübner, 1818 and Helcystogramma Zeller, 1877 (Lepidoptera, Gelechiidae, Dichomeridinae) with twenty-one newly recorded species from Vietnam Author Park, Kyu-Tek BioResource and Environmental Center, Division of Life Sciences, Incheon National University, Incheon, 22012 Korea Author Bae, Yang-Seop 0000-0001-7356-5633 BioResource and Environmental Center, Division of Life Sciences, Incheon National University, Incheon, 22012 Korea & https: // orcid. org / 0000 - 0001 - 7356 - 5633 Author Zhao, Shengnan College of Life Sciences, Nankai University, Tianjin 300071, P. R. China Author Li, Houhun College of Life Sciences, Nankai University, Tianjin 300071, P. R. China text Zootaxa 2020 2020-08-03 4821 3 435 461 journal article 8728 10.11646/zootaxa.4821.3.2 a9792973-949f-4327-82ad-8a38612624b4 1175-5326 4400933 E831BB59-C95B-4C30-B827-131723233045 13. Dichomeris parvisexafurca Li, Zhen & Kendrick, 2010 ( Figs 20 , 52 ). Dichomeris parvisexafurca Li, Zhen & Kendrick, 2010: 71 . TL: China ( Hong Kong ). Material examined: VIETNAM : Bac Kan Province : 1♂ , Ba Be Nat. Park , 26–28 vii 2006 , leg. Park , Chae & Cuong. Vinh Phuc Province : 2♂ , Tam Dao Nat. Park , 1000 m , 05 v 2005 , leg. KT Park & SR Kim ; 1♂ , 1♀ , same locality, 912 m , 13.viii.2005 , leg. KT Park, MY Kim & MY Chae , gen. slide nos. CIS-6704( ♂ ), CIS-6700( ♀ ); 1♀ , same locality, 950 m , 31 vii 2006 , leg. Park , Chae & Cuong , gen. slide no. CIS-6701. Female genitalia ( Fig. 52 ). Apophyses anteriores extremely short, triangularly produced. Eighth sternite weakly sclerotized, with nearly straight posterior margin. Antrum sub-rectangular, deeply concave in semicircular on anterior margin. Ductus bursae with a long, oblique digitate process in left side extending to conjunction with corpus bursae; ductus seminalis arising from basal 1/3 of ductus bursae on ventral surface, with a sclerotized ring at base. Corpus bursae large, rounded, densely spined on inner surface; signum ill-defined, placed at anterior 1/5; accessory bursa arising from middle of signum. Distribution. Vietnam (new record: Bac Kan , Thua Thien-Hue , Vinh Phuc ), China ( Hong Kong ). Remarks. The female is described and illustrated for the first time.