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

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Cyana obliquilineata ( Hampson, 1900 )


Cyana obliquilineata ( Hampson, 1900) 

( Figs 33–36View FIGURES 28–38, 176View FIGURES 176–178, 249View FIGURES 246–251)

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. 33View FIGURES 28–38): ♂, 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 34405View Materials (♂), MWM 34406View Materials (♀) Volynkin (Coll. MWM / ZSM); 1 ♀, NE India, WGoogleMaps  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 35693View Materials (♀) Volynkin (Coll. MWM / ZSM)GoogleMaps  ; ASSAM: 10 ♂, NE India  , Assam, Pan Bari Reserve Forest , 27°08’N, 94°00’E, 4–7.VII.1997, leg. Sinjaev & Murzin, slide MWM 34511View Materials (♂) Volynkin (Coll. MWM / ZSM); 1 ♂, IndiaGoogleMaps  , 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).


Natural History Museum, London


Bavarian State Collection of Zoology














Cyana obliquilineata ( Hampson, 1900 )

Singh, Navneet, Volynkin, Anton V., Kirti, Jagbir Singh, Datta, Harvinder Singh & Ivanova, Maria S. 2020

Cyana baolini

Fang 1992

Chionaema obliquilineata

Hampson 1900