Cyana bacilla Fang, 1992

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

Cyana bacilla Fang, 1992

( Figs 28–31 , 46, 47 , 56 )

Cyana bacilla Fang, 1992 , Sinozoologia, 9: 260, 265, fig. 2 (Type locality: [ China] “ Pingxiang , Guangxi, 230m ”).

Type material examined. Photograph of the holotype: male, “ ẾflÎǐ [Guangxi, Pingxiang] | 230 »º [m] | ϕOifiḯlj [Chinese Academy of Sciences]” / “ 1976.VI.10 | ỊșÌ: Ẁƚƀ [leg. Cheng-lai Fang]” / “ Cyana bacilla | Fang | ḬṱÌ: Ẁƚƀ [identifier: Cheng-lai Fang]” / “ϐ” / red label “Holotype” / blue label with unique ID “ IOZ ( E) 208949 ” ( ICZAS).

Additional material examined. VIETNAM: 3 males, Cao Bằng Prov., Ba Be Lake NP , 300m, II.2009, gen. prep. Nos.: AV6738 , AV6740 ( GMF-B) ; 1 male, 1 female, same data as previous but III.2009, gen. prep. Nos.: AV6742 (male), AV6739 (female) ( GMF-B) ; 2 males, same data as previous but V.2009, gen. prep. No.: AV6741 ( GMF-B) ; 1 male, same data as previous but VIII.2009 ( GMF-B) ; 1 male, Thái Nguyên Prov., 40 km E [ca. 20 km N] Thái Nguyên City, Mỏ Ba , 200m, II.2009, gen. prep. No.: AV6743 ( GMF-B) ; 2 males, Tuyên Quang Prov., Na Hang Nature Reserve , 300m, 22°03’N 105°05’E, 22.II.–5.III.1997, G. Csorba leg., gen. prep. No.: ZSM Arct. 2020- 113 (prepared by Volynkin) ( MWM / ZSM) .

Diagnosis. The forewing length is 11.5–13.0 mm in males and 15.0 mm in the female. Cyana bacilla ( Figs 28–31 ) is most similar externally to C. khami sp. n. ( Figs 26, 27 ) and differs in the somewhat longer forewing in both sexes, the paler transverse lines of the forewing varying from pale scarlet or orange to amber yellow (whereas they are bright scarlet in the congener), and the paler hindwing varying from pink to pale ochreous (whereas it is pale scarlet in C. khami sp. n.). The male and female genitalia of C. bacilla ( Figs 46, 47 , 56 ) are most similar to C. karsticola sp. n. ( Figs 48 , 57 ) and the detailed comparison is provided below in the diagnosis of the latter species.

Distribution. South China (Guangxi Zhuang Autonomous Region) ( Fang 1992, 2000) and Northern Vietnam (Tuyên Quang, Thái Nguyên and Cao Bằng Provinces) ( Fig. 61 ). The record from central Laos (Volynkin & Černý 2019) belongs to C. khami sp. n.

Figures

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.