Dolgoma brevivalva, Volynkin & Saldaitis, 2023

Volynkin, Anton V. & Saldaitis, Aidas, 2023, Three new species of the genus Dolgoma Moore from Vietnam and China (Lepidoptera: Erebidae: Arctiinae: Lithosiini), Ecologica Montenegrina 69, pp. 126-134 : 133

Dolgoma brevivalva sp. n.

https://zoobank.org/ urn:lsid:zoobank.org:act:16B236D4-DAFD-4F5D-A607-4E65103034EA

( Figs 9, 10 , 17 )

Type material. Holotype ( Figs 9 , 17 ): male, “Nord-Vietnam | Mt. Fan-si-pan | Cha pa, 2400m NN | 8.– 29.V.1993 leg. | Sinajev [recte: Sinyaev] & Simonov | Museum Witt” / “Slide | ZSM Arct. | 2021- 422♂ | A. Volynkin ” ( MWM / ZSM).

Paratype. VIETNAM: 1 male, [border of Lai Châu and Lào Cai Provinces] 1600m, Mt. Fan-si-pan (north), Cha-pa , primary forest, 22°17'N 103°44'E, 20–30.IV.1995, V . Sinyaev & loc. coll. leg., gen. prep. No.: ZSM Arct. 2021 - 421♂ (prepared by Volynkin ) ( MWM / ZSM) .

Diagnosis. The forewing length is 11.0–12.0 mm in males. Dolgoma brevivalva sp. n. is externally reminiscent of D. kawila Volynkin & Černý, 2021 ( Fig. 11 ) and D. striola Dubatolov, Kishida & Wang, 2012 ( Fig. 12 ) but differs from the former species in the somewhat narrower forewing, and from D. striola in the smaller head, and the brown body and forewing ground colour, which is ochreous yellow in the congener. The male genitalia of D. brevivalva sp. n. are fundamentally different from D. kawila ( Fig. 19 ) due to the thicker uncus, the markedly shorter and broader valva, the larger phallus, and the broader vesica bearing heavier scobination, and are most similar to D. striola ( Fig. 18 ). However, the new species is distinguished from D. striola by the somewhat longer and thicker uncus, the slightly longer and broader valva, the phallus having a well-developed carina, and the vesica bearing larger spinules of the lateral diverticulum.

The female is unknown.

Distribution. Northern Vietnam (border of Lai Châu and Lào Cai Provinces).

Etymology. The specific epithet is derived from the Latin ‘brevis’ meaning ‘short’ and refers to the remarkably short valva of the new species.

Figures

Figures 9–12. Dolgoma spp.: adults. Depositories of the specimens: 9–11 in MWM/ZSM (11: ex CKC); 12 in SZMN (photo by V.V. Dubatolov).

Figures 17–19. Dolgoma spp.: male genitalia. Depositories of the specimens dissected: 17 and 19 in MWM/ZSM (19: ex CKC); 18 in SZMN (photo by V.V. Dubatolov).