Cyana watsoni Hampson, 1897

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 : 31-33

Cyana watsoni Hampson, 1897 , stat. rev.

( Figs 84–87 , 196 , 264 )

Cyana watsoni Hampson, 1897 , Journal of the Bombay Natural History Society 11: 296 (Type licality: “Khásis,”).

Type material examined. Lectotype (designated herein): ♂ ( Fig. 84 ), printed label “Khasis 96–246” / printed label “Khasis. Nat. Coll.” / handwritten label “ Cyana Watsoni type ♂. Hmpsn.” / printed round label with a red circle “Type” / printed label with a unique identifier “NHMUK010597910” (Coll. NHMUK); paralectotypes: 2 ♀, Upper Burma III.93 E.Y. Watson (Coll. NHMUK).

Other material examined. ASSAM: 1 ♂, Assam ( Coll. NHMUK) ; 2 ♀, 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 , VIII.1894, Nat. Coll. (Coll. NHMUK) ; 2 ♂, Khasia Hills, Assam, Nissary ( Coll. NHMUK) ; 1 ♀, Khasia Hills, Assam ( Coll. NHMUK) ; 1 ♀, Cherrapunji, X.[18]93, Assam ( Coll. NHMUK) ; 1 ♀, Cherrapunji, IX.[18]93, Assam ( Coll. NHMUK) ; 1 ♂, [Meghalaya] Khasis, Nat. Coll. , slide AV20170 ♂ Volynkin ( Coll. ZFMK) ; 22 ♂, 83 ♀, 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, slides MWM 34410 (♂), MWM 34538 (♂), MWM 35877 (♀) Volynkin ( Coll. MWM / ZSM) .

Remark. In order to stabilize the nomenclature, here we designate the male specimen from Khasi Hills deposited in NHMUK and labeled as “Type” as lectotype, and fix the species’ type locality as “Khásis”.

Diagnosis. Forewing length is 14–15 mm in males and 17–18 mm in females. Cyana watsoni has no external differences from C. moelleri and can be distinguished by the genitalia structures only. The male genitalia of C. watsoni differ from those of C. moelleri by their narrower aedeagus and the vesica structure: in C. watsoni the vesica bears a long transverse band-like cluster of strong spine-like cornuti stretching from the base of the dorsal diverticulum to the vesica ejaculatorius, whereas in C. moelleri there is a longitudinal band-like cluster of smaller spine-like cornuti stretching from the vesica base to the base of the distal diverticulum, and a subapical bunch consisting of 5–6 spine-like cornuti. The female genitalia of these species are very similar, but in C. watsoni the ductus bursae is narrower than that of C. moelleri , the posterior sclerotized section of corpus bursae is more rugose, and the signum is slightly smaller.

Distribution. North East India (Assam and Meghalaya) ( Hampson 1897; Hampson 1900, as part of C. molleri , missp.), North Myanmar ( Černý & Pinratana 2009, as a part of C. molleri , missp.) and China (Yunnan) (present study).

Figures

FIGURES 80–87. Cyana spp.: adults. 80, C. moelleri, lectotype ♂, India, Sikkim (©NHMUK); 81, ditto, ♂, India, Sikkim (MWM/ZSM); 82, ditto, ♂, India, Sikkim (MWM/ZSM); 83, ditto, ♀, India, Sikkim (MWM/ZSM); 84, C. watsoni, lectotype ♂, India, Meghalaya (©NHMUK); 85, ditto, ♂, India, Meghalaya (MWM/ZSM); 86, ditto, ♂, China, Yunnan (MWM/ZSM); 87, ditto, ♀, China, Yunnan (MWM/ZSM).

FIGURES 194–196. Cyana spp.: male genitalia. 194, C. guttifera, India, Sikkim, slide ZSM Arct. 124/2017 Volynkin; 195, C. moelleri, India, Sikkim, slide MWM 34506 Volynkin; 196, C. watsoni, India, Meghalaya, slide MWM 34410 Volynkin.

FIGURES 262–267. Cyana spp.: female genitalia. 262, C. guttifera, India, Sikkim, slide ZSM Arct. 125/2017 Volynkin; 263, C. moelleri, India, West Bengal, slide MWM 35879 Volynkin; 264, C. watsoni, India, Meghalaya, slide MWM 35877 Volynkin; 265, C. chrysopeleia, paratype, India, Uttarakhand, slide MWM 35878 Volynkin; 266, C. intercomma, paratype, Thailand, slide AV4663 Volynkin; 267, C. gazella, India, Uttarakhand, slide MWM 34493 Volynkin.