Cyana obliquilineata ( Hampson, 1900 )

Singh, Navneet, Volynkin, Anton V., Kirti, Jagbir Singh, Datta, Harvinder Singh & Ivanova, Maria S., 2020, A review of the genus Cyana Walker, 1854 from India, with descriptions of five new species and three new subspecies (Lepidoptera: Erebidae: Arctiinae: Lithosiini), Zootaxa 4738 (1), pp. 1-93 : 15-16

Cyana obliquilineata ( Hampson, 1900)

( Figs 33–36 , 176 , 249 )

Chionaema obliquilineata Hampson, 1900 , Catalogue of the Lepidoptera Phalaenae in the British Museum 2: 298, pl. 26, fig. 24 (Type locality: [ India, Sikkim] “Sikhim, 1800 feet ”).

= Cyana baolini Fang, 1992 , Sinozoologia 9: 261, 265, fig. 3 (Type locality: [ China] “Xishuangbanna, Yunnan ”), syn. nov.

Type material examined. Holotype (by monotypy) ( Fig. 33 ): ♂, printed label “ Sikkim 1800 ft. Feb. 1897 Dud- geon.” / handwritten label “ Cyana obliquilineata . type ♂. Hmpsn” / printed round label with a red circle “Type” / printed label with a unique identifier “NHMUK010597938” (Coll. NHMUK).

Other material examined. KARNATAKA: 1 ♂ , Karnataka, Jog falls , 20.XI.2014, leg. H.S. Datta (Coll. NZCZSI); 1 ♂ , Karnataka, Yellapur , 22.XI.2014, leg. H.S. Datta (Coll. NZCZSI) ; WEST BENGAL: 1 ♂, Gopald- hara, Mirik , Sikkim (H. Stevens) (Coll. NHMUK); 1 ♂, Gopaldhara , VIII.1918 (Stevens) (Coll. NHMUK); 1 ♂, Gopaldhara, Darjeeling, 3440–5800’ (H. Stevens) 15.VII.[19]18 (Coll. NHMUK); 1 ♂, Gopaldhara, Darjeeling, 3440–5800’ (H. Stevens) 17.VII.[19]18 (Coll. NHMUK) ; MEGHALAYA: 7 ♂, 3 ♀, NE India, W Meghalaya, Um- ran, 33 km N Shillong , 26°06’N, 92°23’E, 800 m, 14–23.VII.1997, leg. Sinjaev & Afonin, slides MWM 34405 (♂), MWM 34406 (♀) Volynkin (Coll. MWM / ZSM); 1 ♀, NE India, W Meghalaya, Umran , 33 km N Shillong, H= 800 m, 25°45’N, 92°23’E, 8–11.XII.1997, leg. V. Sinjaev & M. Murzin, slide MWM 35693 (♀) Volynkin (Coll. MWM / ZSM) ; ASSAM: 10 ♂, NE India , Assam, Pan Bari Reserve Forest , 27°08’N, 94°00’E, 4–7.VII.1997, leg. Sinjaev & Murzin, slide MWM 34511 (♂) Volynkin (Coll. MWM / ZSM); 1 ♂, India , Meghalaya, Umatsar , 15.IX.2014, leg. H.S. Datta (Coll. NZCZSI) ; ARUNACHAL PRADESH: 1 ♂ , Arunachal Pradesh, Naharlagun , 28. IV. 2016, leg. H.S. Datta (Coll. NZCZSI); 1 ♂ , Arunachal Pradesh, Daporijo , 7.V.2016, leg. H.S. Datta (Coll. NZCZSI); 1 ♂ , Mizoram, Zamuang , 14. IX. 2016, leg. Harsimranjeet Singh (Coll. NZCZSI) .

Remark. This species is rather variable in its size and shape of subcostal dark dash in the postmedial area, but the male genitalia structure is stable within its range. The Yunnan populations described as C. baolini have no genital differences from Indian, Nepalese and Thai ones and are conspecific to obliquilineata .

Diagnosis. Forewing length is 12–14 mm in males and 14.5–15.5 mm in females. Cyana obliquilineata resembles externally C. subornata and C. linatula , but its males differ from those of the both similar species by the presence of a small concavity on the postmedial section of the forewing costa (in C. subornata and C. linatula the costa is smoothly arcuate outwards), and less curved postmedial line. Females of C. obliquilineata are very similar to those of C. subornata and C. linatula and can be distinguished by the slightly less elongated forewing apex and less curved postmedial line only. In addition, compred to C. linatula , C. obliquilineata has red ante- and postmedial lines (those are edged with black in C. linatula ). The male genital capsule of C. obliquilineata differs from that of C. linatula by its narrower valva with a less angled costal edge and distal saccular process being slightly broadened distally (that is pointed in C. linatula ). In comparison with C. linatula , the aedeagus of C. obliquilineata is much broader, the vesica is shorter and bears two large lateral clusters of robust spinules (while in C. linatula there is one subapical cluster of smaller spinules), and shorter distal diverticulum bearing a cluster of more robust spinules apically. In the female genitalia, C. obliquilineata differs from C. linatula by its shorter ductus bursae, more heavily sclerotized posterior section of corpus bursae having two bands of long robust spinules (whereas in C. linatula the posterior section of corpus bursae is densely covered with small spinules at the base of the appendix bursae), and smaller signum. The differences from C. rudloffi are listed in the diagnosis of the latter.

Distribution. North East India (Sikkim, Assam, Meghalaya, Arunachal Pradesh) ( Singh et al. 2014), South India (Karnataka) (present study), Nepal (first record), China (Yunnan) ( Fang 1992; 2000, as C. baolini ), Thailand ( Černý & Pinratana 2009) and Cambodia ( Bayarsaikhan & Bae 2016).

Figures

FIGURES 28–38. Cyana spp.: adults. 28, C. subornata, ♂, Sri Lanka (CKC); 29, ditto, holotype ♀, Sri Lanka (©NHMUK); 30, C. linatula, ♂, India, Tamil Nadu (CKC); 31, ditto, ♀, India, Tamil Nadu (CKC); 32, ditto, lectotype ♀, India, Maharashtra (©NHMUK); 33, C. obliquilineata, holotype ♂, India, Sikkim (©NHMUK); 34, ditto, ♂, India, Meghalaya (MWM/ZSM); 35, ditto, ♂, Thailand (CKC); 36, ditto, ♀, India, Meghalaya (MWM/ZSM); 37, C. rudloffi, holotype ♂, India, M. Andaman Isl. (MWM/ZSM); 38, ditto, paratype ♀, India, M. Andaman Isl. (MWM/ZSM).

FIGURES 176–178. Cyana spp.: male genitalia. 176, C. obliquilineata, India, Meghalaya, slide MWM 34405 Volynkin; 177, C. rudloffi, holotype, India, M. Andaman Isl., slide MWM 35678 Volynkin; 178, C. dudgeoni, India, Meghalaya, slide MWM 34415 Volynkin.

FIGURES 246–251. Cyana spp.: female genitalia. 246, C. pudens, Malaysia, slide MWM 35686 Volynkin; 247, C. subornata, Sri Lanka, slide NHMUK010315746 Volynkin (©NHMUK); 248, C. linatula, India, Tamil Nadu, slide AV4650 Volynkin; 249, C. obliquilineata, India, Meghalaya, slide MWM 35693 Volynkin; 250, C. rudloffi, paratype, India, M. Andaman Isl., slide MWM 35679 Volynkin; 251, C. dudgeoni, India, West Bengal, slide MWM 34416 Volynkin.