Cyana malayana Bucsek, 2012, 2018

Volynkin, Anton V., Černý, Karel & Ivanova, Maria S., 2018, A review of the Cyana bianca (Walker, 1856) species-group with descriptions of a new species and a new subspecies from Indochina (Lepidoptera, Erebidae, Arctiinae), Zootaxa 4497 (1) : -

Cyana malayana Bucsek, 2012 , stat. nov.

( Figs. 11–16 , 31–33 , 40, 41 , 46 )

Cyana bianca malayana Bucsek, 2012 , Erebidae, Arctiinae of Malay Peninsula – Malaysia 2012: 100, pl. 17, figs. 248, 248а, 248b (Type locаlity: “ Mаlаysiа, Pаhаng distr., Cаmeron Highlаnds, Kаmpung Kuаlа Boh vill. env., 850–1050 m, 4°27,9’N, 101°34,8’E ”).

Type material examined. Holotype ( Figs. 11 , 31 ): ♂, Malaysia, Pahang distr., Cameron Highlands, Kampung Kuala Boh vill. env., 4°27,9’N, 101°34,8’E, 850–1050 m, 26.III.–3.IV.2001, K. Bucsek leg., slide MWM 33517 Volynkin (Coll. MWM/ ZSM) . Paratypes: 3 ♂, same data as in the holotype, slides MWM 31806, MWM 33483 Volynkin (Coll. MWM/ ZSM).

Other material examined: MYANMAR: 1 ♂ , Burma merid., Tenasserim, Khao Yai, 1000 m, 99’30’’E, 13’14’’N, Lf , VII.1995, lg. Steinke & Lehmann, slide MWM 33488 Volynkin (Coll. MWM/ ZSM) ; 1 ♀, Burmah, Adanusn. / Rothschild Bequest B.M. 1939.-I. ( Coll. NHMUK) ; THAILAND: 1 ♂, W Thailand, Kanchanaburi , Sri Sawat, Ban Dong Lek, 10.V. 2005, 735 m, leg. K. Sukhumalind, slide AV 3855 ♂ Volynkin (Coll. CKC) ; 6 ♂, SW Thailand , Ranong, 543 m, 10°02’01’’N, 98°40’17,66”E, 7.IV.2013, leg. K. Černý, slides AV 3852 ♂, AV 3853 ♂ Volynkin (Coll. CKC) ; 8 ♂, 1 ♀, SW Thailand, Ranong [prov.] , Ranong, 380 m, 10°01’32”N, 98°40’13”E, 3– 4.XII.2005, leg. K. Černý, slide AV 3854 ♂ Volynkin (Coll. CKC) ; 1 ♂, 4 ♀, SW Thailand, Chumphon, Pa Toh, Ban Lang Tang , 162 m, 9°46’5”N, 98°46’59”E, 2006 ex ovo, K. Černý (Coll. CKC) ; 1 ♂, SW Thailand , Chumphon, Pa Toh, Ban Lang Tang , 162 m, 9°46´5”N, 98°46´59”E, 19, 21.XI.2006, leg. K. Černý, slide AV3851 ♂ Volynkin (Coll. CKC) ; 4 ♂, SW Thailand, Chumphon, Pa Toh, Ban Lang Tang , 162 m, 9°46’5”N, 98°46’59”E, 7.XII.2005, leg. K. Černý (Coll. CKC) ; 1 ♂, Muang Thai, Changwat Chumphon, Amphoe Pa Toh , 10 km W Baan Lang Tang, primary forest, 160 m, 11–12.VII.2007, lg. Manghong Jantharamphorn & Lechner, ex coll. Lechner (Coll. CKC) ; 2 ♂, SW Thailand, Nakhon Si Tammarat, Khao Luang region, Nopphitam env., 70 m, 8°44.043’N, 99°41.450’E, 12–13.IV.2013, leg. K. Černý (Coll. CKC) ; 3 ♂, 2 ♀, SW Thailand, Nakhon Si Tammarat, Amphoe Ron Pibun, Ang Ka Tai Hill , 8°14.16’N, 99°48.12’E, 9.IV.2013 leg. K. Černý (Coll. CKC) ; MALAYSIA: 6 ♂, 2 ♀ , Malaysia, Prov. Perak, Taiping , VI– V.1978, coll. Dr. W. Thomas, slides ZSM Arct. 145/2017 ♂, MWM 33485 (♂) , ZSM Arct. 146/2017 ♀, MWM 33514 (♀) Volynkin ( Coll. MWM/ ZSM) ; 1 ♂, Malaysia, Taiping, coll. Dr. W. Thomas ( Coll. MWM/ ZSM) ; INDONESIA: 1 ♂, W Sumatra, Padang Panjang, Lembah Anai , 300 m, 0°27’S, 100°23’E, I.2004, leg. Jakl, slide MWM 33486 Volynkin (Coll. MWM/ ZSM) ; 1 ♂, W Sumatra, Mt. Sanggul, Landai , 1200–1300 m, 0°00’, 100°38’E, I–II.2004, leg. St. Jakl, slide MWM 33487 Volynkin (Coll. MWM/ ZSM) ; 1 ♂, Indonesia, North Sumatra, Via Sindar Raya – Pematang Raya , 11 km of SR, 400 m, 24.III.1986, E. Diehl leg. (Coll. CKC) ; 1 ♂, Sumatra, Via Sindar Raya , 11 km of SR, 400m, 3°53’N, 98°51’E 16.III.1991, E. Diehl leg. (Coll. CKC).

Remarks. 1. The male and female genitalia of malayana ( Figs. 31–33 , 40, 41 ) have significant differences from those of C. bianca ( Fig. 25–27 , 37 ). Therefore we treat this taxon as a good species and not a subspecies of C. bianca . 2. The type series from Cameron Highlands has reduced black borders of the ante- and postmedial lines ( Fig. 11 ), while the specimens from other parts of the species’ range north and south of Cameron Highlands have the well-developed black borders of the transverse lines ( Figs. 12–16 ). Because of the absence of genital differences ( Figs. 31–33 ), we treat this population as a local color form only. 3. The female paratypes of the species ( Fig. 42 ) are not conspecific to the male holotype and paratypes and belong to Cyana determinata sausae Bucsek, 2012 described by males also from Pahang.

Diagnosis. Forewing length is 14.5– 18 mm in males and 19–20 mm in females. Externally, C. malayana ( Figs. 11–16 ) has no significant differences from C. bianca ( Figs. 1–4 ) and C. indosinica sp. nov. ( Figs. 5–10 ). The male genitalia of C. malayana ( Figs. 31–33 ) differ clearly from those of C. bianca ( Fig. 25–27 ) in the rounded lateral lobes of the vinculum, the larger and more robust ampulla, the much larger medial posterior, medial anterior and distal diverticula, and the broader medial dorsal diverticulum; from C. indosinica sp. nov. ( Figs. 28–30 ) they differ in the significantly larger and more robust ampulla, the narrower medial posterior and distal diverticula, which have narrower fields of cornuti, the smaller medial anterior diverticulum, and the basally narrower medial dorsal diverticulum. The female genitalia of C. malayana ( Figs. 40, 41 ) differ from those of C. bianca ( Fig. 37 ) in the longer ductus bursae, the larger appendix bursae, the shorter and stronger rugose posterior sclerotized plate of the corpus bursae, the weakly sclerotized medial-lateral sclerotized band of the corpus bursae, and the much smaller signa; from C. indosinica sp. nov. ( Figs. 38, 39 ) they differ in the more weakly sclerotized and much less rugose posterior plate of the corpus bursae, and the presence of only two signa in the corpus bursae (while in C. indosinica sp. nov. there are three signa in the corpus bursae).

Distribution ( Fig. 46 ). South Myanmar ( Hampson 1900), South-West and South Thailand (provinces Kanchanaburi, Chumphon, Ranong and Nakhon Si Tammarat), Malaysia (Malay Peninsula), Indonesia (Sumatra Isl.).

Figures

FIGURE 46. Distribution mаp of the species аnd subspecies of the Cyana bianca species-group.

FIGURES 9–16. Cyana spp.: аdults. 9, C. indosinica, paratype ♀, S Vietnam, Lam Dong (MWM/ZSM); 10, C. indosinica, paratype ♀, N Thailand, Nan (MWM/ZSM); 11, C. malayana, holotype ♂, Malaysia, Pahang (MWM/ZSM); 12, C. malayana, ♂, Malaysia, Perak (MWM/ZSM); 13, C. malayana, ♂, Indonesia, Sumatra (MWM/ZSM); 14, C. malayana, ♂, S Thаilаnd, Chumphon (CKC); 15, C. malayana, ♀, S Thailand, Ranong (CKC); 16, C. malayana, ♀, Mаlаysiа, Perаk (MWM/ZSM).

FIGURES 31–33. Cyana malayana: mаle genitаliа. 31, holotype, Mаlаysiа, Pаhаng, slide MWM 33517 Volynkin; 32, W Thаilаnd, Kаnchаnаburi, slide MWM 33490 Volynkin; 33, Indonesiа, West Sumаtrа, slide MWM 33487 Volynkin.

FIGURES 37–42. Cyana spp.: femаle genitаliа. 37, C. bianca, Indiа, Assаm, slide ZSM Arct. 137/2017 Volynkin; 38, C. indosinica, pаrаtype, N Thаilаnd, Nаn, slide MWM 33513 Volynkin; 39, C. indosinica, pаrаtype, S Vietnаm, Lаm Dong, slide ZSM Arct. 144/2017 Volynkin; 40, C. malayana, Mаlаysiа, Perаk, slide MWM 33514 Volynkin; 41, C. malayana, Mаlаysiа, Perаk, slide ZSM Arct. 146/2017 Volynkin; 42, C. determinata sausae, pаrаtype of C. bianca malayana, Mаlаysiа, Pаhаng, slide MWM 33484 Volynkin.

FIGURES 25–27. Cyana bianca: mаle genitаliа. 25, Indiа, Assаm, slide ZSM Arct. 136/2017 Volynkin; 26, Indiа, Assаm, slide MWM 34570 Volynkin; 27, E Nepаl, slide MWM 33492 Volynkin.

FIGURES 1–8. Cyana spp.: аdults. 1, C. bianca, ♂, India, Assam (MWM/ZSM); 2, C. bianca, ♂, India, Assam (MWM/ZSM); 3, C. bianca, ♂, E Nepal (MWM/ZSM); 4, C. bianca, ♀, India, Assam (MWM/ZSM); 5, C. indosinica, holotype ♂, N Thаilаnd, Nаn (MWM/ZSM); 6, C. indosinica, paratype ♂, C Thailand, Saraburi (CKC); 7, C. indosinica, pаrаtype ♂, S Lаos, Chаmpаsаk (CAV); 8, C. indosinica, pаrаtype ♂, S Vietnаm, Lаm Dong (MWM/ZSM).

FIGURES 28–30. Cyana indosinica: mаle genitаliа. 28, holotype, N Thаilаnd, Nаn, slide ZSM Arct. 138/2017 Volynkin; 29, pаrаtype, C Lаos, Khаmmouаn, slide MWM 33491 Volynkin; 30, pаrаtype, S Vietnаm, Lаm Dong, slide AV3123 Volynkin.