Cyana signa ( Walker, 1854 )

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 : 50-52

Cyana signa ( Walker, 1854)

( Figs 133–135 , 225 , 280 )

Bizone signa Walker, 1854 , List of the specimens of lepidopterous insects in the collection of the British Museum 2: 550 (Type locality: [E Bangladesh or NE India, S Meghalaya] “Silhet”).

= Bizone fasciculata Walker, 1856 , List of the specimens of lepidopterous insects in the collection of the British Museum 7: 1684 (Type locality: “Hindostan”).

Type material examined. Lectotype of Bizone signa (designated herein) ( Fig. 133 ): ♂, handwritten label “Silhet 47-58” / printed label “5. BIZONE SIGNA .” / printed round label with a green circle “Type” / printed label with a unique identifier “NHMUK010597924” (Coll. NHMUK); lectotype of Bizone fasciculata (designated herein): ♂ without abdomen, handwritten label “Ind.” / handwritten label “ Bizone fasciculata Walk ” / handwritten label “ fasciculata n.” / printed label “Type” / handwritten label “84” / printed label “511” / handwritten label “A Walker’s type ♂ Bizone fasciculata 7-1684” / “TYPE (printed) LEP.: No. 423 Bizone fasciculata Walker (handwritten) HOPE DEPT. OXFORD (printed)” (Coll. OUMNH).

Other material examined. UTTARAKHAND: 18 ♂, 21 ♀, India, Kumaon-Himalaya, Distr. NainiTal, Bhim- Tal , 1500 m, leg. de Freina, Himalaya Expedition, 10.V.–30.VI.1971, slides MWM 33884 (♀), MWM 35725 (♂) Volynkin ( Coll. MWM / ZSM) ; 27 ♂, 16 ♀, India sept., Kumaon-Himalaya, Distr. NainiTal, BhimTal , 1500 m, leg. F. Smetacek, 29.IV.–IX.1978, slide MWM 35726 (♀) Volynkin ( Coll. MWM / ZSM) ; 1 ♂, India, U.P., Nainital, 2100m, 14–20.VI.1975, leg. W. Thomas, slide MWM 33504 (♂) Volynkin ( Coll. MWM / ZSM) ; 1 ♂, India, Ut- tarakhand, Mussoorie, 12.VI.1994, leg. APS Kaleka ( Coll. NZCZSI) ; 1 ♂, Uttarakhand, Kempty Fall, 13.VI.1994, leg. APS Kaleka ( Coll. NZCZSI) ; SIKKIM: 1 ♂, Sikkim, Lachen, 13.V.2009, leg. Rahul Joshi ( Coll. NZCZSI) ; 1 ♂, Sikkim, Golitar, 30.IV.2014, leg. Rahul Joshi ( Coll. NZCZSI) ; MEGHALAYA: 2 ♂, Assam, Khasis ( Coll. NHMUK) .

Remarks. 1. Hampson (1900) cited specimens from Khasis as “Type”, while Bizone signa was described from Sylhet. 2. In the original descriptions of Bizone signa and Bizone fasciculata, Walker (1854 ; 1856) did not mention a number of specimens, therefore the existence of syntypes is probable. To avoid any confusion with the similar C. adita , here we designate the specimens of both taxa deposited in the NHMUK collection and labeled as “Type”s as lectotype.

Diagnosis. Forewing length is 17–19 mm in males and 20–21 mm in females. Cyana signa differs externally from C. adita by its distal discal spots merged into a dash, and oblique antemedial line. The male genitalia of C. signa differ from those of C. adita by their slightly broader uncus, smaller lateral lobes of vinculum, slightly shorter ampulla, shorter distal lobe of subbasal diverticulum, slightly longer ventral lobe of subbasal diverticulum, and smaller spinules of the distal cluster. The female genitalia of C. signa differ from those of C. adita by the broader ostium bursae, the longer sclerotized area in the posterior section of corpus bursae, and the broader appendix bursae.

Distribution. North and North East India (Himachal Pradesh, Uttarakhand, Sikkim, Meghalaya, Manipur, Arunachal Pradesh, Manipur) ( Hampson 1900; Singh et al. 2014), Nepal ( Kishida 1995; 1998), North Bangladesh ( Walker 1854), North Myanmar (Kachin State) ( Hampson 1900), China (Tibet, Yunnan) ( Fang 2000) and North Thailand (Chiang Mai Prov.) ( Černý & Pinratana 2009, part). The specimens illustrated by Černý & Pinratana (2009) as C. signa belong to C. khasiana , but we found specimens of the true C. signa in the CKC collection. The record for Guangdong ( Dubatolov et al. 2012) belongs to female of C. adita .

Figures

FIGURES 128–135. Cyana spp.: adults. 128, C. dryope, holotype ♂, India, Uttarakhand (MWM/ZSM); 129, ditto, paratype ♂, W Nepal (MWM/ZSM); 130, C. adita, ♂, India, West Bengal (MWM/ZSM); 131, ditto, ♀, India, West Bengal (MWM/ZSM); 132, ditto, lectotype ♀, India, Sikkim (©NHMUK); 133, C. signa, lectotype ♂, Bangladesh, Sylhet (©NHMUK); 134, ditto, ♂, India, Uttarakhand (MWM/ZSM); 135, ditto, ♀, India, Uttarakhand (MWM/ZSM).

FIGURES 222–225. Cyana spp.: male genitalia. 222, C. dryope, holotype, India, Himachal Pradesh, slide MWM 34440 Volynkin; 223, ditto, W Nepal, slide MWM 34439 Volynkin; 224, C. adita, India, slide MWM 35727 Volynkin; 25 C. signa, India, Uttarakhand, slide MWM 35725 Volynkin.

FIGURES 277–281. Cyana spp.: female genitalia. 277, C. arama metis, paratype, India, Uttarakhand, slide MWM 34426 Volynkin; 278, C. distincta, Thailand, slide MWM 34521 Volynkin; 279, C. adita, India, West Bengal, slide MWM 35728 Volynkin; 280, C. signa, India, Uttarakhand, slide MWM 35726 Volynkin; 281, C. candida, India, Himachal Pradesh, slide ZSM Arct. 56/2017 Volynkin.