Cyana abrupta Volynkin & Černý, 2019

Volynkin, Anton V. & Černý, Karel, 2019, On the correct identification of Cyana bianca (Walker, 1856), with description of a new species and notes on the taxonomy of the Cyana insularis (Draudt, 1914) species-group (Lepidoptera, Erebidae, Arctiinae), Ecologica Montenegrina 21, pp. 53-61 : 59-60

Cyana abrupta Volynkin & Černý , sp. nov.

( Figs 5, 6 , 15 , 18 )

Type material. Holotype ( Figs 5 , 15 ): male, “NE India, Assam, Pan Bari Reserv Forest , 27°08'N, 94°00'E, 4–7.VII.1997, leg. Sinjaev & Murzin”, slide MWM 31805 Volynkin (Coll. MWM / ZSM).

Paratypes: INDIA: 21 males, 6 females, same data as in the holotype, slides ZSM Arct. 136/2017 ♂, ZSM Arct. 137/2017 ♀ Volynkin (Coll. MWM / ZSM) ; 2 males, NE India, Assam, Nambor Reserve Forest, Garampani , h= 100 m, 26°30'N, 93°56'E, 21–29.XI.1997, leg. V. Siniaev & M. Murzin, slide MWM 34571 Volynkin (Coll. MWM / ZSM) ; 2 males, 2 females, 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, slide MWM 34570 Volynkin (Coll. MWM / ZSM) ; 1 male, Sikkim, 1800 ft., VI.1897, Dudgeon [leg.] (Coll. NHMUK) ; 1 female, Sikkim, Noand / Felder Colln. / Rothschild Bequest B.M. 1939.-I. (Coll. NHMUK) ; 1 male, Darjeeling / Moore Coll. 94- 106. (Coll. NHMUK) ; 2 females, Digboi , Assam (L. Brunt) / Rothschild Bequest B.M. 1939.-I. (Coll. NHMUK) ; 1 female, Khasis , X.1896, Nat. Coll. / Rothschild Bequest B.M. 1939.-I. (Coll. NHMUK) ; 1 male, 2 females, Sikkim, O. Möller / Rothschild Bequest B.M. 1939.-I. (Coll. NHMUK) ; 1 male, 3 females, Sikkim, 4000–7000 ft., Möller / Rothschild Bequest B.M. 1939.-I. (Coll. NHMUK) ; 2 females, Tezpore , Assam / Rothschild Bequest B.M. 1939.-I. (Coll. NHMUK) ; 1 female, Darjeeling , ex coll. Lidderdale, Joisey coll., Brit. Mus. 1922-306 (Coll. NHMUK) ; NEPAL: 1 male, Nepal, Mechi, Taplejung area, Tamur Valley , 4 km N Dobhan, 800 m, 87°40‟E, 27°22‟N, 22.X.1996, leg. Gy.M. László & G. Ronkay, slide MWM 33492 Volynkin (Coll. MWM / ZSM) ; BANGLADESH: 1 female, Konapara, Kalam / Rothschild Bequest B.M. 1939.-I. (Coll. NHMUK) .

Diagnosis. Cyana abrupta sp. nov. ( Figs 5, 6 ) is very similar externally to C. indosinica Volynkin & Černý, 2018 ( Figs 7, 8 ) and C. malayana ( Figs 9, 10 ), and reliable differences can be found in the genitalia structures only. The male genital capsule of C. abrupta sp. nov. ( Fig. 15 ) is most similar to that of C. indosinica ( Fig. 16 ) by its small ampulla, but differs by the triangular lateral lobes of the vinculum (those are more rounded in C. indosinica and C. malayana as well). The vesica of C. abrupta ( Fig. 15 ) differs clearly from those of C. indosinica ( Fig. 16 ) and C. malayana ( Fig. 17 ) by its medial posterior, medial anterior and distal diverticula being much shorter and narrower, and the narrower medial dorsal diverticulum. The female genitalia of the new species ( Fig. 18 ) differ from those of C. indosinica ( Fig. 19 ) and C. malayana ( Fig. 20 ) by the shorter ductus bursae, the long, narrow and weakly rugose posterior sclerotized plate of the corpus bursae, the heavily sclerotized medial-lateral sclerotized band (that is broader, shorter and much more weakly sclerotized in C. indosinica and C. malayana ), and the significantly larger anterior signum.

Description. Adult ( Figs 5, 6 ). Forewing length 14–16 mm in males and 17–19 in females. The sexual dimorphism well expressed: males slightly smaller than females, have narrower forewings with androconial lobes on underside, and three black spots in the cell, whereas females have broader forewings without androconial pockets and with only two black dots in cell. Antennae ciliate in both sexes with slightly longer ciliae in males. Head white. Thorax white, with broad crimson bands on tegulae and patagia margins, and crimson transverse bands on medial and posterior parts. Abdomen whitish with numerous pale red scales. Forewing ground color white. Subbasal line crimson, wavy; antemedial line broad, crimson, its outer margin slightly wavy and bordered by thin black line; postmedial line broad, slightly S-like curved, its outer margin bordered by thin black line; terminal line crimson, with diffuse inner margin; in male there is a short black streak connecting costa and outer black margin of postmedial line; three black round spots of different size in cell in males and two large black round spots in female; cilia whitish. Hindwings pale red, without pattern, slightly lightened along costal margin; cilia pale red. Male genitalia ( Fig. 15 ). Uncus elongated, slender, distally narrowed, apically tapered, basally connected with scaphium. Anal tube broad, scaphium broad, membranous; subscaphium broad, setose. Tegumen of moderate length, narrow; vinculum short, broad, Ulike, with large, trigonal lateral lobes; juxta trapezoidal, with broadly trigonal bottom concavity. Valva lobelike, with strongly curved costal margin, distally narrowed, apically rounded; sacculus broad, moderately sclerotized; distal saccular process long, robust, curved dorsally, with spine-like tip, well separated from distal part of valva, its tip almost reaches valva apex; ventral plate of costa short, narrow, with a small ampulla directed ventrally. Aedeagus long and broad. Vesica broad, consists of four largest diverticula with small subdiverticula: (1) medial posterior and (2) distal diverticula covered with numerous small cornuti, (3) medial anterior diverticulum being weakly granulated, and (4) medial dorsal diverticulum with four small and weakly granulated subdiverticula; vesica ejaculatorius broad, projected ventrally. Female genitalia ( Fig. 18 ). Ovipositor short and broad. Papillae anales rectangular with rounded angles; apophyses thin, apophyses anteriores slightly shorter than apophyses posteriores; ostium bursae broad, antrum broad, funnel-like, weakly sclerotized; ductus bursae moderately broad, membranous, slightly rugose; corpus bursae sack-like, with broad sclerotized area postero-laterally, medial lateral sclerotized band and two signa: separated medial one and anterior one being connected to the lateral sclerotized band; appendix bursae broadly conical, membranous, situated dorso-posteriorly.

Distribution. Nepal ( Kishida 1994, as bianca ), North and North East India (Arunachal Pradesh, Himachal Pradesh, Sikkim, Assam, Meghalaya) and Bangladesh ( Kirti et al. 2013, as bianca ; Volynkin et al. (2018), as bianca ).

Figures

Figures 1–10. Cyana spp.: adults. 1, C. bianca, holotype male, India (OUMNH); 2, C. juliettae, male, C Thailand (CKC); 3, C. carmina carmina, male, the Philippines (CKC); 4, C. carmina malacca, male, S Thailand (CKC); 5, C. abrupta, holotype male, India, Assam (MWM/ZSM); 6, C. abrupta, paratype female, India, Assam (MWM/ZSM); 7, C. indosinica, holotype male, N Thailand, Nan (MWM/ZSM); 8, C. indosinica, paratype female, N Thailand, Nan, Saraburi (CKC); 9, C. malayana, male, Indonesia, Sumatra (MWM/ZSM); 10, C. malayana, female, W Malaysia, Perak (MWM/ZSM).

Figures 15–17. Cyana spp.: male genitalia. 15, C. abrupta, holotype, India, Assam, slide ZSM Arct. 136/2017 Volynkin; 16, C. indosinica, holotype, N Thailand, Nan, slide ZSM Arct. 138/2017 Volynkin; 17, C. malayana, holotype, Malaysia, slide MWM 33517 Volynkin.

Figures 18–20. Cyana spp.: female genitalia. 18, C. abrupta, paratype, India, Assam, slide ZSM Arct. 137/2017 Volynkin; 19, C. indosinica, paratype, S Vietnam, Lam Dong, slide ZSM Arct. 144/2017 Volynkin; 20, C. malayana, Malaysia, Perak, slide ZSM Arct. 146/2017 Volynkin.