Nudina witti Spitsyn, Volynkin, Huang & Bolotov, 2021

Volynkin, Anton V., Huang, Si-Yao, Spitsyna, Elizaveta A., Bolotov, Ivan N. & Spitsyn, Vitaly M., 2021, Three new species of the genus Nudina Staudinger, 1887 from northern Indochina (Lepidoptera: Erebidae: Arctiinae: Lithosiini), Zootaxa 4970 (3), pp. 547-557 : 551

Nudina witti Spitsyn, Volynkin, Huang & Bolotov , sp. nov.

( Figs 7, 8 , 13, 14 )

Type material. Holotype ( Figs 7 , 13 ): male, “N-Vietnam, 1600m, Mt. Fan-si-pan (Nord), Cha-pa, Primärurwald [primary forest] (22.17’N 103.44’E), 20.–30.IV.1995, leg. Sinjaev [Sinyaev] & einh. Samml. [local collectors]”, gen. slide No.: ZSM Arct. 2019-537 (prepared by Volynkin) (MWM/ ZSM).

Paratypes. VIETNAM: 1 male, the same data as in the holotype, gen. slide Nos.: ZSM Arct. 2020-172, ZSM Arct. 2020-173 (prepared by Volynkin) (MWM/ ZSM); 2 males, N Vietnam, 1400m, Mai-chau , primary forest, 40km SE Moc-chau, 20°50’N 104°50’E, 7–15.IV.1995, leg. Sinyaev & loc. coll., gen. slide Nos.: ZSM Arct. 2020- 168, ZSM Arct. 2020-170 (prepared by Volynkin) (MWM/ ZSM) ; MYANMAR: Kachin State, Malaria village , 27.5701°N, 97.3716°E, alt. 470 m, border between mountain rainforest and grass pastures, 14.III.2014, Bolotov & Spitsyn leg., RMBH unique number: Sph 0892, gen. prep. in glycerol by Spitsyn ( RMBH) .

Diagnosis. The forewing length is 11–13 mm in males. The new species is very similar externally to the sympatric N. harpago but can be distinguished by the presence of brown suffusion in the terminal area of the hindwing, whereas the hindwing of N. harpago is monotonous yellow. The male genital capsule of N. witti differs clearly from those of N. ankistro and N. harpago by the shorter vinculum less tapered apically, the long, narrow and nearly straight harpe (it is robust and hook-like in N. ankistro and N. harpago ), the longer and distally wider distal membranous lobe of the valva, and the long and narrow, stick-like ventro-distal process of valva (it is arrowheadshaped with rounded tip in N. ankistro and N. harpago ). The distal section of the aedeagus of N. witti is narrower than in N. ankistro and N. harpago and its wrinkled expendable part is markedly shorter. The distal carinal processes of the new species are somewhat shorter and covered with smaller denticles than those of N. ankistro and N. harpago . Compared to N. ankistro and N. harpago , the vesica of N. witti is basally narrower and has a somewhat larger lateral diverticulum.

The female is unknown.

Distribution. The species is known from two localities in northern Vietnam (Hòa Bình and Lào Cai Provinces) and northern Myanmar (Kachin State).

Etymology. The species is dedicated to the memory of Dr Thomas J. Witt, a famous lepidopterist and a founder of the Museum Witt Munich having one of the largest collections of Heterocera in the world.

Figures

FIGURES 1–8. Nudina spp.: adults. Depositories of the specimens: 1, 2 in SCAU; 3–8 in MWM/ZSM.

FIGURES 13–16. Nudina spp.: male genitalia. Depositories of the specimens: 13, 14 in MWM/ZSM; 15 in CAV; 16 in SCAU.