Dolgoma kawila, Volynkin & Černý, 2021

Volynkin, Anton V. & Černý, Karel, 2021, Taxonomic review of the genus Dolgoma Moore (Lepidoptera: Erebidae: Arctiinae) from Thailand with descriptions of three new species, Zootaxa 5060 (3), pp. 417-428 : 420

Dolgoma kawila sp. n.

( Figs 9, 10 , 21 , 30 )

Type material. Holotype ( Figs 9 , 21 ): male, “N. Thailand Chiang Mai-prov., Fang distr. Doi Pa Hom Pok, 2050m 20°07’30’’N, 99°08’49’’E 21.IV.2006 leg. K. Cerný [recte: Černý]” / “Slide AV4696 ♂ A. Volynkin ” ( MWM / ZSM, ex CKC).

Paratypes: THAILAND: 4 males, 1 female, same data as for the holotype, gen. prep. No.: AV4697 (female) (prepared by Volynkin) ; 2 females, same locality and collector as for the holotype, 5–6. V. 2006, K. Černý leg. ; 1 male, Lampang, Mae Chaem , 1453m, 18°56.119’N, 99°23.481’E, 9.V.2008, K. Černý leg. (all in CKC) .

Diagnosis. The forewing length is 12 mm in males and 13 mm in females. Dolgoma kawila sp. n. ( Figs 9, 10 ) is superficially reminiscent of D. angulifera ( Figs 11, 12 ), but can easily be distinguished by its smaller size (the forewing length of D. angulifera is 13–13.5 mm in males and 13–15 mm in females), the less elongate forewing (the length to width ratio is 2.4–2.5:1 vs. 2.8: 1 in D. angulifera ), the rusty-brown body and forewing coloration (brown-orange in D. angulifera ), the more diffuse postmedial line with a less extended outer angular protrusion, and the more brownish hindwing. The male genital capsule of the new species ( Fig. 21 ) differs from that of D. angulifera ( Fig. 22 ) in the somewhat thinner uncus, the narrower valva (the length to width ratio is 4:1 vs. 3.3: 1 in D. angulifera ) with the subapically more oblique dorsal margin, and the narrower distal saccular process (the ratio of its width to the distal section of the valva width is 2.5:1 vs. 2.25: 1 in D. angulifera ). The phalli of the two species are similar. Compared to D. angulifera , the vesica of D. kawila sp. n. has a shorter and narrower distal diverticulum lacking a ventral lobe and somewhat stronger spinules on the lateral diverticulum. The female genitalia of the new species ( Fig. 30 ) differ from those of D. angulifera ( Fig. 31 ) in the somewhat broader ductus bursae (in proportion to the ovipositor width) with a longer sclerotized posterior section, the somewhat longer and wider (in proportion to the ovipositor width) lateral sclerotized plate of the posterior section of the corpus bursae, and the markedly broader anterior section of the corpus bursae. The differences from D. khelanga sp. n. are listed under the diagnosis of the latter species.

Distribution. Known from Northern Thailand (Chiang Mai and Lampang Provinces).

Etymology. Kawila was a Siamese nobleman who ruled Chiang Mai in the late XVI–early XVII centuries.

Figures

FIGURES 9–16. Dolgoma spp.: adults. Depositories of the specimens: 9 and 13 in MWM/ZSM (ex CKC); 10 and 16 in CKC; 11, 12 and 15 in NHMUK (©The Trustees of NHMUK); 14 in SZMN (photo by V.V. Dubatolov).

FIGURES 21–23. Dolgoma spp.: male genitalia. Depositories of the specimens dissected: 21 and 23 in MWM/ZSM (ex CKC); 22 in NHMUK (©The Trustees of NHMUK).

FIGURES 30–32. Dolgoma spp.: female genitalia. Depositories of the specimens dissected: 30 and 32 in CKC; 31 in NHMUK (©The Trustees of NHMUK).