Cyana kucheri Volynkin & Černý, 2019

Volynkin, Anton V. & Černý, Karel, 2019, Three new species of Cyana Walker, 1854 from Indochina and China (Lepidoptera, Erebidae, Arctiinae, Lithosiini), Zootaxa 4586 (2), pp. 338-350 : 341-342

Cyana kucheri Volynkin & Černý , sp. n.

( Figs 19, 20 , 32, 33 , 39 )

urn:lsid:zoobank.org:act:5A5202E2-DB33-4AB8-9146-BDA4ED814923

Type material. Holotype ( Figs 19 , 32 ): ♂, “N-Vietnam [ North Vietnam], 1400 m, Mai-chau, Urwald [primary forest], 40 km SE Moc-chau, 20.50’ N 104.50 ’E, 07.–15.IV.1995, leg. Sinjaev & EinhSamml. [local collectors]”, slide ZSM Arct. 78/2017 ♂ Volynkin (Coll. MWM/ ZSM).

Paratypes: 17 ♂, 1 ♀, same data as in the holotype, slides ZSM Arct. 77/2017 ♂, ZSM Arct. 79/2017 ♀, Volynkin (Coll. MWM/ ZSM) .

Diagnosis. Cyana kucheri sp. n. ( Figs 19, 20 ) is an unmistakable species characterized by its forewing pattern resembling that of C. artemis sp. n. ( Figs 1–4 ), C. moelleri ( Figs 5–8 ) and C. intercomma ( Figs 11–16 ), and hindwing being pale rosy orange. The male genital capsule of C. kucheri sp. n. ( Figs 32, 33 ) differs clearly from those of C. artemis sp. n. ( Figs 23, 24 ), C. moelleri ( Fig. 25 ) and C. intercomma ( Figs 28–30 ) by its more elongated and narrower valva with a longer and strongly curved distal saccular process. The vesica structure of the new species is more similar to that of C. intercomma by presence of the elongated dorsal diverticulum bearing a bunch of spinules apically, but in C. kucheri sp. n. that diverticulum is longer and the spinules on its apex are much weaker than those in C. intercomma ; distal cluster of spinules is broad and round in C. kucheri sp. n., whereas in C. intercomma that is band-like; vesica of C. kucheri sp. n. has a broad subbasal ventral diverticulum with a broad cluster of short and thin spinules, whereas vesica of C. intercomma lacks a subbasal ventral diverticulum but has a basal dorsal bunch of robust spinules. In addition, the aedeagus of C. intercomma has a heavily sclerotised subapical transverse band covered with small but robust dens, whereas in C. kucheri sp. n. the aedeagus lacks subapical sclerotization. The male genitalia structure of C. kucheri sp. n. ( Figs 32, 33 ) is most similar to that of C. gazella ( Fig. 34 ). The genital capsule of the new species differs from that of C. gazella by its less robust vinculum, narrower and slightly longer valva with a smaller medial crest, and more robust distal saccular process. Compared to that of C. gazella , the vesica of C. kucheri sp. n. has a much broader medial section with a much broader distal diverticulum; dorsal diverticulum is much narrower and longer in C. kucheri sp. n. and bears a narrower cluster of thinner spinules than that of C. gazella ; in addition, in C. kucheri sp. n. the subapical cluster of spinules is slightly broader and the ventral subbasal cluster of spinules is much larger than those of C. gazella . The female genitalia of C. kucheri sp. n. ( Fig. 39 ) differ clearly from those of C. artemis sp. n. ( Fig. 35 ), C. moelleri ( Fig. 36 ) and C. intercomma ( Fig. 37 ) by their narrow ductus bursae without sclerotization, much smaller and strongly rugose sclerotised posterior section of corpus bursae, elliptical signum bursae (those are round in the three other species), and much larger, elongated and curved appendix bursae, whereas in the three other species appendices bursae are much smaller and globular or saccate. The female genitalia structure of C. kucheri sp. n. ( Fig. 39 ) is most similar to that of C. gazella ( Fig. 40 ). However, it can be easily distinguished by its much larger appendix bursae and longer signum bursae; in addition, the corpus bursae of C. kucheri sp. n. is weakly sclerotised, while that of C. gazella has a heavily sclerotised area laterally.

Description. Adult ( Figs 19, 20 ). Forewing length 16.5– 17 mm in males (16.5 mm in the holotype) and 20 mm in female. Antennae of both sexes ciliate. Head white. Thorax white, tegulae and patagiae with broad orange margins. Abdomen pale red with slight admixture of ochreous scales. Forewing ground color white with slight admixture of pale red scales. Transverse lines orange; subbasal line broad, slightly wavy, broadened at costa; antemedial line broad, its outer margin straight, while inner margin with a broad concavity in the cell. Postmedial line broad posteriorly and strongly broadened in the cell and at costa. Subterminal line short, broadly crescent-like, expressed only in the anterior part of wing. Two large black spots in the cell: inner spot reniform, outer spot rounded, situated more posteriorly. Black stroke on postmedial line near costa. Hindwing pale rosy orange, discal spot absent. Male genitalia ( Figs 32, 33 ). Uncus short, narrow, distally tapered, its basal half connected to tuba analis. Tuba analis broad, subscaphium as a broad setose field. Tegumen narrow, shorter than valva. Juxta trapezoidal, with deep trigonal lower concavity. Vinculum short but robust, U-shaped. Valva elongated, broadened medially, its costal margin strongly curved medially; distal section of valva strongly elongated, slightly narrowed distally, rounded apically. Sacculus heavily sclerotised, narrow; distal saccular process robust, somewhat shorter than distal section of valva, slightly curved dorsally, pointed apically. Aedeagus elongated, broadened medially, narrowed apically. Medial part of vesica globular; subbasal dorsal diverticulum as long as aedeagus, slightly narrowed distally, bears a cluster of numerous small spinules; two globular granulated diverticula medially; subbasal cluster of small spinules ventrally; broad, round cluster of large spinules subapically. Female genitalia ( Fig. 39 ). Ovipositor short, broadly conical. Papillae anales trapezoidal with rounded angles. Apophyses thin; apophyses anteriores approximately two times shorter than apophyses posteriores. Ostium bursae moderately broad. Ductus bursae short, membranous, wrinkled anteriorly. Posterior section of corpus bursae conically narrowed, heavily sclerotised. Anterior section of corpus bursae globular, membranous, with a large, elliptical, weakly dentate signum. Basal section of appendix bursae broadly conical, heavily sclerotised, strongly wrinkled; distal part of appendix bursae membranous, elongated, much longer than corpus bursae, crescent-like curved, connected to the sclerotised basal part by a narrow membranous isthmus.

Distribution. Cyana kucheri sp. n. is to date, only known from its type locality, Mai Chau district of the Hoa Binh Province in the northern Vietnam.

Etymology. The species name is dedicated to Artem A. Kucher (Barnaul, Russia), an excellent veterinarian and a senior author’s family friend.

Figures

FIGURES 17–22. Cyana spp.: adults. 17, C. bacilla, ♂, C Laos, Khammouan Prov. (CKC); 18, C. bacilla, ♀, C Laos, Khammouan Prov. (CKC); 19, C. kucheri, holotype ♂, N Vietnam (MWM/ZSM); 20, C. kucheri, paratype ♀, N Vietnam (MWM/ZSM); 21, C. gazella, ♂, N Vietnam (MWM/ZSM); 22, C. gazella, ♀, N Thailand (CKC).

FIGURES 32–34. Cyana spp.: male genitalia. 32, C. kucheri, holotype, N Vietnam, slide ZSM Arct. 78/2017 Volynkin; 33, C. kucheri, paratype, N Vietnam, slide ZSM Arct. 77/2017 Volynkin; 34, C. gazella, N Thailand, slide MWM 34496 Volynkin.

FIGURES 35–40. Cyana spp.: female genitalia. 35, C. artemis, paratype, N Vietnam, slide MWM 34525 Volynkin; 36, C. moelleri, E Nepal, slide ZSM Arct. 108/2017 Volynkin; 37, C. intercomma, paratype, W Thailand, slide AV4663 Volynkin; 38, C. bacilla, C Laos, slide MWM 34568 Volynkin; 39, C. kucheri, paratype, N Vietnam, slide ZSM Arct. 79/2017 Volynkin; 40, C. gazella, N India, slide MWM 34493 Volynkin.

FIGURES 1–8. Cyana spp.: adults. 1, C. artemis, holotype ♂, N Vietnam (MWM/ZSM); 2, C. artemis, paratype ♂, China, Guangxi (MWM/ZSM); 3, C. artemis, paratype ♂, N Thailand (CKC); 4, C. artemis, paratype ♀, N Thailand (CKC); 5, C. moelleri, holotype ♂, NE India (©NHMUK); 6, C. moelleri, ♂, NE India (MWM/ZSM); 7, C. moelleri, ♂, N Nepal (MWM/ ZSM); 8, C. moelleri, ♀, NE India (MWM/ZSM).

FIGURES 9–16. Cyana spp.: adults. 9, C. butyracea, holotype ♂, N Vietnam (MWM/ZSM); 10, C. butyracea, paratype ♂, S Vietnam (MWM/ZSM); 11, C. intercomma, paratype ♂, W Thailand (CKC); 12, C. intercomma, paratype ♂, N Thailand (CKC); 13, C. intercomma, paratype ♂, S Thailand (CKC); 14, C. intercomma, ♂, Malay Peninsula (MWM/ZSM); 15, C. intercomma, ♂, China, Yunnan (MWM/ZSM); 16, C. intercomma, paratype ♀, W Thailand (CKC).

FIGURES 23–25. Cyana spp.: male genitalia. 23, C. artemis, holotype, N Vietnam, slide MWM 34524 Volynkin; 24, C. artemis, paratype, China, Guangxi, slide MWM 34537 Volynkin; 25, C. moelleri, NE India, slide MWM 34506 Volynkin.

FIGURES 26–28. Cyana spp.: male genitalia. 26, C. butyracea, holotype, N Vietnam, slide ZSM Arct. 112/2017 Volynkin; 27, C. butyracea, holotype, S Vietnam, slide ZSM Arct. 113/2017 Volynkin; 28, C. intercomma, paratype, W Thailand, slide AV3821 Volynkin.

FIGURES 29–31. Cyana spp.: male genitalia. 29, C. intercomma, Malay Peninsula, slide MWM 34532 Volynkin; 30, C. intercomma, China, Yunnan, slide MWM 34535 Volynkin; 31, C. bacilla, C Laos, slide MWM 34567 Volynkin.