Cyana lada Volynkin, Černý & Saldaitis, 2019

Volynkin, Anton V., Černý, Karel, Saldaitis, Aidas & Ivanova, Maria S., 2019, On the correct identification of ‘ Cyana dohertyi (Elwes, 1890) ’ from northern Indochina and China, with descriptions of two new species and a new subspecies (Lepidoptera, Erebidae, Arctiinae), Zootaxa 4658 (1), pp. 155-167 : 157

Cyana lada Volynkin, Černý & Saldaitis , sp. nov.

( Figs 1–4 , 25 , 37 )

urn:lsid:zoobank.org:act:8779BBC4-76C7-497C-93BE-25BC34CDA7FF

Type material. Holotype ( Figs 1 , 25 ): ♂, “ Vietnam (N), Mts. Fan-si-pan, W-side, Chapa , 22°20’N 103°40’E, 1600–1800m, VI.1995, leg. local collectors”, slide ZSM Arct. 97/2017 ♂ Volynkin (Coll. MWM / ZSM).

Paratypes: VIETNAM: 13 ♂, same data as in the holotype (Coll. MWM / ZSM); 40 ♂, N Vietnam, 16–1800m, Mt. Fan-si-pan (West), Cha-pa (=Sapa), (22.20’ N 103.40 ’E), IX.1994 (secondary forest), leg. Mong, slide ZSM Arct. 96/2017 ♂ Volynkin (Coll. MWM / ZSM); 11 ♀, Vietnam sept., 16–1800m, Mt. Fan-si-pan (West), Cha-pa, secondary forest, 22.20’ N 103.40 ’E, IX.1994, leg. Mong, slides ZSM Arct. 100/2017 ♀, ZSM Arct. 102/2017 ♀ Volynkin (Coll. MWM / ZSM); 8 ♀, North Vietnam, Tam Dao (sec. forest), 60 km NW Hanoi, 1200m (21.34’ N 105.20 ’E), 1–5.V.1993, leg. Sinajev & Simonov, slide ZSM Arct. 103/2017 ♀ Volynkin (Coll. MWM / ZSM); 10 ♂, N Vietnam, 1400m, Mai-chau, primary forest, 40 km SE Moc-chau, 20.50’ N 104.50 ’E, 7–15.IV.1995, leg. Sinjaev & local collectors, slide ZSM Arct. 101/2017 ♂ Volynkin (Coll. MWM / ZSM); 2 ♂, 1 ♀ Vietnam sept., Tam Dao, 950 m, V.1990, leg. Kubáň (Coll. CKC); CHINA: 1 ♂, China, NW Yunnan, Nu Jiang valley, road Lushui/Gulang, H- 2000m, N28°58.15 ’’ E98°47.40 ’’, 13.V.2018, Butvila & Saldaitis leg., slide AV4783 ♂ Volynkin (Coll. ASV); 1 ♀, China, NW Yunnan, Nu Jiang valley, road Lushui/Gulang, H- 1650m, N27°01.49 ’’ E98°52.54 ’’, 14.V.2018, But- vila & Saldaitis leg., slide AV4784 ♀ Volynkin (Coll. AFM); 1 ♂, Szechuan, 15.VIII., Höne / Chion . dohertyi Elw. det. F. Daniel / ♂, slide AV2060 ♂ Volynkin (Coll. ZFMK).

Diagnosis. Forewing length is 15–16.5 mm in males (15 mm in the holotype) and 20–21.5 mm in females. Cyana lada ( Figs 1–4 ) is very similar externally to the sympatric C. dohertyi mertsana ( Figs 21–24 ), and differs by its more pinkish hindwing only. In many cases a correct identification is possible by the genitalia structures only. The new species also resembles C. titovi ( Figs 5, 6 ), but can be distinguished by its slightly larger size, paler male hindwing and more pinkish female hindwing. Compared to another Vietnamese member of the species-group, C. aurantifascia ( Figs 7, 8 ), the new species has smaller black spots on forewing, slightly paler male hindwing with a less developed discal spot, and more pinkish female hindwing with a less developed discal spot. In the male genita- lia, the vesica shape of C. lada ( Fig. 25 ) is clearly different from that of C. titovi ( Figs 29, 30 ), C. aurantifascia ( Figs 31, 32 ) and C. dohertyi ( Figs 33–35 ) and is most similar to that of C. gazella (13, 14, 26, 38), C. abiens ( Figs 9, 10 , 28 , 42 ) and C. sikkimensis ( Figs 11, 12 , 27 , 41 ) as well. However, the vesica of C. lada can be easily distinguished from those of C. gazella , C. abiens and C. sikkimensis by the absence of spinules on the 1 st distal diverticulum, the much longer cluster of spinules on the subbasal diverticulum, and the configuration of other distal diverticula and the lateral diverticulum. In addition, the largest diverticulum of C. lada is elongated and bears am elongated cluster of robust spinules, whereas in C. sikkimensis the largest diverticulum is shorter, globular and bears a broader cluster of much smaller spinules. The female genitalia of C. lada ( Fig. 37 ) are most similar to those of C. gazella ( Fig. 38 ), but differ by the slightly longer and narrower ductus bursae, the lateral protrusion of the posterior section of corpus bursae being larger and weaker sclerotized, the larger anterior section of corpus bursae, and the larger appendix bursae. Compared to those of the sympatric C. dohertyi mertsana ( Fig. 44 ), the female genitalia of C. lada are characterized by the presence of lateral protrusion of the posterior section of corpus bursae, and the shorter sclerotized proximal section of the appendix bursae.

Distribution. North Vietnam (Provinces of Lao Cai, Vinh Phuc and Hoa Binh) and Southwestern China (Sich- uan and Yunnan Provinces).

Etymology. Lada is a goddess in Baltic and Slavic mythology associated with beauty and fertility.

Figures

FIGURES 1–8. Cyana spp.: adults. 1, C. lada, holotype ♂, Vietnam (Coll. MWM/ZSM); 2, C. lada, paratype ♂, Vietnam (Coll. MWM/ZSM); 3, C. lada, paratype ♂, Vietnam (Coll. MWM/ZSM); 4, C. lada, paratype ♀, Vietnam (Coll. MWM/ZSM); 5, C. titovi, holotype ♂, Vietnam (©NHMUK); 6, C. titovi, paratype ♀, Vietnam (CAV); 7, C. aurantifascia, holotype ♂, Vietnam, (©NHMUK); 8, C. aurantifascia, paratype ♀, Vietnam (CAV).

FIGURES 25–28. Cyana spp.: male genitalia. 25, C. lada, holotype, Vietnam, slide ZSM Arct. 97/2017♂ Volynkin; 26, C. gazella, Thailand, slide MWM 34496 Volynkin; 27, C. sikkimensis, NE India, slide MWM 34424 Volynkin; 28, C. abiens, China, slide SM Arct. 82/2017♂ Volynkin.

FIGURES 37–42. Cyana spp.: female genitalia. 37, C. lada, paratype, Vietnam, slide ZSM Arct. 103/2017♀ Volynkin; 38, C. gazella, N India, slide MWM 34493 Volynkin; 39, C. titovi, paratype, Vietnam, slide AV2297♀ Volynkin; 40, C. aurantifascia, paratype, Vietnam, slide AV2301♀ Volynkin; 41, C. sikkimensis, NE India, slide MWM 34428 Volynkin; 42, C. abiens, China, slide ZSM Arct. 83/2017♀ Volynkin.

FIGURES 17–24. Cyana dohertyi sspp.: adults. 17, C. dohertyi dohertyi, syntype ♂, NE India (©NHMUK); 18, C. dohertyi dohertyi, syntype ♀, NE India (©NHMUK); 19, C. dohertyi dohertyi, ♂, China, NW Yunnan (MWM/ZSM); 20, C. dohertyi dohertyi, ♀, NE India (©NHMUK); 21, C. dohertyi mertsana, holotype ♂, Thailand (©NHMUK); 22, C. dohertyi mertsana, paratype ♂, Vietnam (MWM/ZSM); 23, C. dohertyi mertsana, paratype ♂, Thailand (MWM/ZSM); 24, C. dohertyi mertsana, paratype ♀, Thailand (MWM/ZSM).

FIGURES 29–32. Cyana spp.: male genitalia. 29, C. titovi, holotype, Vietnam, slide AV2302♂ Volynkin; 30, C. titovi, paratype, Vietnam, slide AV1703♂ Volynkin; 31, C. aurantifascia, holotype, Vietnam, slide AV2299♂ Volynkin; 32, C. aurantifascia, paratype, Vietnam, slide AV2300♂ Volynkin.

FIGURES 33–36. Cyana spp.: male genitalia. 33, C. dohertyi dohertyi, syntype, NE India, slide NHMUK010313263 Volynkin (©NHMUK); 34, C. dohertyi dohertyi, China, Yunnan, slide MWM 31803 Volynkin; 35, C. dohertyi mertsana, holotype, Thailand, slide AV2339♂ Volynkin; 36, C. ariadne, syntype, China, slide AV1876♂ Volynkin.

FIGURES 9–16. Cyana spp.: adults. 9, C. abiens, holotype ♂, China, Prov. Shaanxi, Qinling (IZCAS); 10, C. abiens, ♀, China (MWM/ZSM); 11, C. sikkimensis, syntype ♂, NE India (©NHMUK); 12, C. sikkimensis, ♀, NE India (MWM/ZSM); 13, C. gazella, ♂, Vietnam (MWM/ZSM); 14, C. gazella, ♀, Thailand (CKC); 15, C. ariadne, syntype ♂, China (©NHMUK); 16, C. ariadne, syntype ♀, China (©NHMUK).

FIGURES 43–45. Cyana spp.: female genitalia. 43, C. dohertyi dohertyi, NE India, slide NHMUK010313264 Volynkin (©NHMUK); 44, C. dohertyi mertsana, paratype, Thailand, slide ZSM Arct. 106/2017♀ Volynkin; 45, C. ariadne, China, slide AV2058♀ Volynkin.