Cyana karsticola, Volynkin & Černý & Huang & Saldaitis, 2023

Volynkin, Anton V., Černý, Karel, Huang, Si-Yao & Saldaitis, Aidas, 2023, Taxonomic review of the Cyana adelina (Staudinger) species-group (Lepidoptera: Erebidae: Arctiinae) with descriptions of three new species and one new subspecies from Laos, Thailand and China, Zootaxa 5323 (4), pp. 477-498 : 488-495

Cyana karsticola sp. n.

( Figs 32, 33 , 48 , 57 )

Type material. Holotype ( Figs ): male, “ Laos, prov. Vientiane | Vang Vieng, 270m, | 18°55’40’’N; 102°24’49’’E | 20.IV.2017 leg. K. Černý ” / “Slide | AV4128ϐ | A. Volynkin ” ( MWM / ZSM, ex coll. CKC).

Paratypes. LAOS: 7 males, 2 females, same data as holotype, gen. prep. Nos.: AV4129 (male), AV4130 (female) (prepared by Volynkin) ( CKC) .

Diagnosis. The forewing length is 11.0–12.0 mm in males and 11.5–12.0 mm in females. Cyana karsticola sp. n. ( Figs 32, 33 ) is externally vaguely reminiscent of C. griseilinea ( Figs 22–25 ) but differs clearly in the smaller size, the grey head, thorax and forewing markings (they are greyish-brown in the congener), the markedly broader and more diffuse ante- and postmedial lines in the male and the thinner and more distinct transverse lines in the female, the interrupted subterminal line in both sexes, and the veins in the postmedial area being less suffused with grey. Additionally, the hindwing of the new species has a discal spot which is absent in the congener. The male genitalia of C. karsticola sp. n. ( Fig. 48 ) are most similar to C. bacilla ( Figs 46, 47 ), from which the new species is distinguished by the somewhat narrower serrulate plates of the anellus, the longer and broader phallus, and the longer and broader vesica with a shorter and denser lateral cluster of spines, and the broader and bilobate ventral diverticulum bearing two elliptical clusters of more robust spines whereas C. bacilla has a conical ventral diverticulum bearing a single ribbon-like cluster of finer spines. In the female genitalia, C. karsticola sp. n. ( Fig. 57 ) differs from C. bacilla ( Fig. 56 ) in the markedly longer, narrower and more heavily sclerotised ductus bursae, the broader sclerotised posterior section of the corpus bursae which is more protruding on its left side, the broader anterior section of the corpus bursae bearing smaller signa, and the broader appendix bursae with a longer bulla.

Distribution. Northern Laos (Vientiane Province) ( Fig. 61 ).

Etymology. The specific epithet refers to the habitat of the new species situated in karst mountains ( Figs 58 , 59 ). The name is a noun in the nominative singular in apposition.

Figures

FIGURE 58. Laos, Vientiane Province, karst mountains near Vang Vieng Town, the type locality of Cyana karsticola sp. n., 20.IV.2017 (photo by K. Černý).

FIGURE 59. Laos, Vientiane Province, vicinities of Vang Vieng Town, 270m, 18°55’40’’N 102°24’49’’E, the habitat of Cyana karsticola sp. n., 20.IV.2017 (photo by K. Černý).

FIGURE 61. Distribution map of Cyana spp. in E and SE Asia.

FIGURES 26–33. Cyana spp.: adults. Depositories of the specimens: 26, 30 and 32 in MWM/ZSM (26 and 32 ex CKC); 27 and 33 in CKC; 28, 29 and 31 in GMF-B.

FIGURES 46–48. Cyana spp.: male genitalia. Depositories of the specimens dissected: 46 and 48 in MWM/ZSM (48 ex CKC); 47 in GMF-B.

FIGURES 54–57. Cyana spp.: female genitalia. Depositories of the specimens dissected: 54 and 55 in MWM/ZSM; 56 in GMF-B; 57 in CKC.

FIGURES 18–25. Cyana spp.: adults. Depositories of the specimens: 18 and 19 in CKC; 20 and 21 in NHMUK (©The Trustees of NHMUK); 22 in MNHN (photo by unknown photographer, © MNHN); 23–25 in MWM/ZSM.