Cyana dudgeoni Hampson, 1895

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 : 18-19

Cyana dudgeoni Hampson, 1895

( Figs 39–41 , 178 , 251 )

Cyana dudgeoni Hampson, 1895 , Transactions of the Entomological Society of London 1895: 293 (Type locality: [ India, Sikkim] “Sikhim”).

Type material examined. Lectotype (designated herein) ( Fig. 39 ): ♂, “ Sikkim. (printed) 10.6.90 (handwritten) G.C. Dudgeon. 94–52. (printed)” / handwritten label “ Cyana dudgeoni type ♂. Hmpsn.” / printed round label with a red circle “Type” / printed label with a unique identifier “NHMUK010597945” (Coll. NHMUK).

Other material examined. SIKKIM: 1 ♀, India, Sikkim , Legship, 500 m, 24–28.VII.1990, leg. W. Thomas (Coll. MWM / ZSM) ; 1 ♂ India, Sikkim , Chungthang, 28.IV.2014, leg. H.S. Datta (Coll. NZCZSI) ; WEST BEN- GAL: 1 ♂, Gopaldhara, Mirik, Sikkim (H. Stevens) (Coll. NHMUK) ; 2 ♀, Darjiling (F. Moller) (Coll. NHMUK) ; 2 ♂, 2 ♀, India W.B., 850 m, Darjeeling , Pashok, leg. W. Thomas, 29.III.1986 (2 ♂), 3.IV.1986 (1 ♀), 4.VII.1986 (1 ♀) (Coll. MWM / ZSM) ; 1 ♂, India WB, Darjeeling , 2000 m, 12–20.VIII.1985, leg. Dr. W. Thomas (Coll. MWM / ZSM) ; 1 ♂, India WB, Darjeeling Mangpu-road , 1800 m, 18. VI.1987, leg. W. Thomas, coll. Dr. W. Thomas, Mus. Witt, München (Coll. MWM / ZSM) ; 1 ♂, 2 ♀, India WB, 650 m, Darjeeling Rambi , 28.III.1986, leg. W. Thomas, slide MWM 34416 (♀) Volynkin (Coll. MWM / ZSM) ; ASSAM: 2 ♂, 1 ♀, NE India, Assam , Pan Bari Reserve For- est, 27°08’N, 94°00’E, 4–7.VII.1997, leg. Sinjaev & Murzin (Coll. MWM / ZSM) ; 1 ♀, NE India, Assam , Nameri Nat. Park, 40 km N Tezpur, 150 m, 27°20’N, 93°15’E, 24.VII–2.VIII.1997, leg. Sinjaev & Murzin (Coll. MWM / ZSM) ; MEGHALAYA: 1 ♀, Khasis, 94–246 (Coll. NHMUK) ; 3 ♂, 1 ♀, Khasis. Nat. Coll. (Coll. NHMUK) ; 1 ♂, Khasia Hills, Assam, Nissary (Coll. NHMUK) ; 1 ♂, Khasia Hills , X.1894, Nat. Coll. (Coll. NHMUK) ; 3 ♂, 45 ♀, NE India, W Meghalaya , Umran, 33 km N Shillong, 26°06’N, 92°23’E, 800 m, 14–23.VII.1997, leg. Sinjaev & Afonin, slide MWM 34415 (♂) Volynkin (Coll. MWM / ZSM) ; 3 ♂, 5 ♀, NE India, Assam , W Meghalaya , Garo Hills, Nokrek National Park, 25°40’N, 91°04’E, 1150 m, 2–13.VII 1997, leg. Afonin & Sinajev (Coll. MWM / ZSM) ; ARUNACHAL PRADESH: 1 ♂, India, Arunachal Pradesh , Poma, 29.IV.2016, leg. H.S. Datta (Coll. NZCZSI) ; 1 ♀, India, Arunachal Pradesh , Raga, 4.V.2016, leg. H.S. Datta (Coll. NZCZSI) ; 2 ♀, India, Arunachal Pradesh , Raga, 5.V.2016, leg. H.S. Datta (Coll. NZCZSI) ; 1 ♀, India, Arunachal Pradesh , Tippi, 15.V.2016, leg. H.S. Datta (Coll. NZCZSI) ; 1 ♀, India, Arunachal Pradesh , Tippi, 16.V.2016, leg. H.S. Datta (Coll. NZCZSI) ; MIZORAM: 1 ♂, Mizoram , Serchip, 8.IV.2017, leg. H.S. Datta (Coll. NZCZSI) ; 3 ♂, India, Mizoram , Serchip, 9.IV.2017, leg. H.S. Datta (Coll. NZCZSI) ; 2 ♂, India, Mizoram , Thenzawl, 6.IV.2017, leg. H.S. Datta (Coll. NZCZSI) ; 3 ♂, Mizoram , Lunglei, 10.IV.2017, leg. H.S. Datta (Coll. NZCZSI) ; 1 ♂, India, Mizoram , Lunglei, 11.iv.2017, leg. H.S. Datta (Coll. NZCZSI) ; 1 ♂, India, Mizoram , Zotlang, 15.IV.2017, leg. H.S. Datta (Coll. NZCZSI) ; 2 ♂, India, Mizoram , Zotlang, 16.IV.2017, leg. H.S. Datta (Coll. NZCZSI) ; 1 ♀, India, Mizoram , Zotlang, 16.IV.2017, leg. H.S. Datta (Coll. NZCZSI) ; 2 ♂, India, Mizoram , Reiek, 20.IV.2017, leg. H.S. Datta (Coll. NZCZSI) .

Remark. In the original description, Hampson (1895) described male and female, therefore the description is based on syntypes. As for the genus, a strong sexual dimorphism is characteristic and as many species are distributed sympatrycally, so confusion is possible. In order to stabilize the nomenclature, we designate the male specimen deposited in NHMUK and labeled as ‘type’ as lectotype.

Diagnosis. Forewing length is 11.5–12 mm in males and 14.5–15 mm in females. Cyana dudgeoni resembles externally C. obliquilineata and C. rudloffi , but male differs by the not angled forewing costa at apex, less elongated forewing apex, antemedial line of uniform width (in C. obliquilineata and C. rudloffi that is narrowed in the cell), postmedial line being less narrowed in the cell and not curved between the cell and the costa, and the black spots being situated as a triangle with the base being parallel the forewing costa (whereas in C. obliquilineata and C. rudloffi the black spots form a triangle with the base parallel the anal forewing margin). The female of C. dudgeoni differs from those of C. obliquilineata and C. rudloffi by its black medial spots of forewing forming a shorter triangle, antemedial line being strongly curved between the cell and the forewing costa, and the postmedial line being slightly more strongly curved in the cell. The male genital capsule of C. dudgeoni is most similar to that of C. rudloffi , but can be distinguished by its medially broader valva with a shorter distal section, and distal saccular process of uniform width (in C. rudloffi that is broadened distally). The aedeagus of C. dudgeoni is significantly smaller than that of C. obliquilineata and C. rudloffi , the vesica is broad, globular, bears a broad cluster of numerous short spinules, whereas in C. obliquilineata and C. rudloffi the vesica is narrower, elongate, bears two lateral clusters of robust spine-like cornuti medially, and a small cluster of spine-like cornuti on the tip of its distal diverticulum. The female genitalia of C. dudgeoni differ clearly from those of C. obliquilineata and C. rudloffi by the rugose sclerotized posterior section of corpus bursae with no band-like clusters of spinules.

Distribution. North East India (Sikkim, north of West Bengal, Assam, Meghalaya, Manipur, Nagaland, Mizoram, Arunachal Pradesh) ( Hampson 1900; Singh et al. 2014), Nepal, China, Thailand ( Černý & Pinratana 2009), Laos, Vietnam, Cambodia ( Bayarsaikhan & Bae 2016), Malay Peninsula ( Bucsek 2012).

Figures

FIGURES 39–51. Cyana spp.: adults. 39, C. dudgeoni, lectotype ♂, Sikkim (©NHMUK); 40, ditto, ♂, India, Meghalaya (MWM/ZSM); 41, ditto, ♀, India, West Bengal (MWM/ZSM); 42, C. puella puella, ♂, India, Uttarakhand (MWM/ZSM); 43, ditto, ♀, India, Uttarakhand (MWM/ZSM); 44, C. flavicincta, holotype ♂, India, Meghalaya (©NHMUK); 45, ditto, ♀, India, Meghalaya (MWM/ZSM); 46, C. peregrina, holotype of arguta ♂, India, Kerala (©NHMUK); 47, ditto, ♂, India, Kerala (MWM/ZSM); 48, ditto, ♂, Sri Lanka (CKC); 49, ditto, lectotype ♀, Sri Lanka (©NHMUK); 50, ditto, ♀, India, Kerala (MWM/ ZSM); 51, ditto, ♀, Sri Lanka (CKC).

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.