Cyana luxuriosa, Volynkin & Saldaitis, 2022

Volynkin, Anton V. & Saldaitis, Aidas, 2022, Cyana luxuriosa, a new species from Xizang, China (Lepidoptera: Erebidae: Arctiinae), Ecologica Montenegrina 53, pp. 1-7 : 2-6

Cyana luxuriosa sp. n.

http://zoobank.org/ urn:lsid:zoobank.org:act:EDD44B0E-270C-42A7-A4ED-C34F9F7BA381

( Figs 1, 2 , 9 , 12 )

Type material. Holotype ( Figs 1 , 9 ): male, “ China, Xizang, Motuo County, Hanmi, Duoxiongla Valley , 2200m, 20–24.VII.2005, local collectors leg.” / “Slide AV6499 ♂ A. Volynkin ” ( WIGJ).

Paratypes. CHINA: 1 male, 5 females with the same data as in the holotype, gen. prep. No.: AV6500 (female) (prepared by Volynkin) ; 1 male, 4 females, Xizang, Motuo County, Laohanmi (10 km from Hanmi to Lage), Duoxiongla Valley , 2400m, 20–27.VII.2005, local collectors leg .; 5 males, 6 females, Xizang, Motuo County, Hanmi, Duoxiongla Valley , 2200m, 9–12.VIII.2005, local collectors leg. ( ASV, GMF-B, RMB & WIGJ) .

Diagnosis. The forewing pattern of new species ( Figs 1, 2 ) differs clearly from C. puer ( Figs 3–6 ) and C. neopuer ( Figs 7, 8 ) in the black costal margin in the subbasal area, the black inner fringe of the antemedial line (it is absent or present as a thin dash in the posterior section of the antemedial line), the deeper crimson ante- and postmedial lines, the larger black spots in the cell, the thicker black outer fringe of the postmedial line, and the somewhat broader subterminal ochreous-yellow area. The thorax of C. luxuriosa sp. n. has a dorsally monotonous amber yellow mesothorax whereas it has a white medial spot in C. puer . Additionally, compared to C. neopuer , the pattern of the thorax and the subbasal line of the forewing of C. luxuriosa sp. n. are amber yellow whereas they are pale crimson in the congener. The male genitalia of C. luxuriosa sp. n. ( Fig. 9 ) are very similar to C. puer ( Fig. 10 ) but differ in the shorter tegumen (in proportion to the length of the valva), the shorter saccular process, the somewhat longer ampulla, and the smaller subdiverticula of the dorsal subbasal diverticulum. Compared to C. neopuer ( Fig. 11 ), the male genitalia of the new species have a distal (third) cluster of spine-like cornuti, a shorter tegumen (in proportion to the length of the valva), a somewhat longer ampulla, and smaller subdiverticula of the dorsal subbasal diverticulum. The female genitalia of C. luxuriosa sp. n. ( Fig. 12 ) differ from those of C. puer ( Fig. 13 ) in the somewhat shorter apophyses, the longer ductus bursae with narrower sclerotised rugose lengthwise plates protruding into the corpus bursae, and the slightly larger signa bursae; from C. neopuer ( Fig. 14 ) they differ in the longer ductus bursae with longer and more heavily sclerotised lengthwise rugose plates protruding into the corpus bursae, and the somewhat more elongate corpus bursae with slightly smaller signa bursae.

Description. External morphology of adults. Male ( Fig. 1 ). Forewing length 19–21 mm. Head white. Antenna weakly ciliate. Thorax ochreous-yellow with white medial spot dorsally. Forewing ground colour white. Subbasal line ochreous-yellow, dilated and extended along costal margin anteriorly, and disappearing posteriorly. Antemedial line wide, crimson, strongly curved outwards in cell, with black fringe inwardly. Subbasal area with black costal margin fused with black inner fringe of antemedial line. Medial spot large, elliptical, black, touching antemedial line. Discal spots large, black, connected to each other and touching postmedial line. Postmedial line wide, nearly straight with slightly wavy outer margin, crimson with black outer fringe medially and posteriorly, and thin dash-like with black outer part at costa; margin. Postmedial area narrow with black dash at costal margin. Subterminal area wide, ochreous-yellow. Forewing cilia whitish. Hindwing pale ochreous-yellow with paler subcostal area. Abdomen white with admixture of ochreous scales laterally and distally. Female ( Fig. 2 ). Forewing length 20–24 mm. Antenna weakly ciliate. Similar to male but forewing broader with only one round discal spot, postmedial line curved outwards between cell and costa, and somewhat narrower subterminal area. Male genitalia ( Fig. 9 ). Uncus short, rhomboidal with rectangular tip, dorso-ventrally flattened. Tuba analis moderately broad, with setose subscaphium. Tegumen short, with moderately broad arms. Vinculum somewhat longer than tegumen, robust, more or less rectangular anteriorly. Valva lobular, somewhat dilated medially, apically rounded. Costa slightly convex medially. Ampulla short and narrow, more or less trapezoid, flattened, directed ventrally. Sacculus broad. Distal saccular process robust, straight basally and tapered and up curved distally, apically pointed. Juxta broad X-shaped with shorter posterior branches. Phallus elongate and broad, cylindrical, with short and rounded coecum. Vesica broad with more or less globular main chamber bearing broad cluster of numerous short spine-like cornuti distally and short, granulose lateral diverticulum bearing broad cluster of numerous short spine-like cornuti. Dorsal subbasal diverticulum large, sack-like, distally granulose with three short apical subdiverticula. Ventral subbasal diverticulum broad, semiglobular, granulose with cluster of numerous spine-like cornuti posteriorly. Vesica ejaculatorius basally broad with short and thin basal plate, directed ventrad. Female genitalia ( Fig. 12 ). Ovipositor short. Papilla analis trapezoid with rounded corners, weakly setose. Apophyses elongate and thin. Apophysis anterioris slightly shorter than apophysis posterioris. Ostium bursae broad. Ductus bursae tubular, with membranous posterior section funnel-like dilated posteriorly. Anterior section of ductus bursae slightly dilate anteriorly, rugose with two broad, rugose, weakly sclerotised and rugose band-like lengthwise plates protruding into posterior end of corpus bursae. Corpus bursae sack-like, membranous with two signa (round and elliptical) lateroanteriorly. Appendix bursae positioned laterally on right side, with broad and semiglobular basal section and narrow conical distal section. Bulla broad, elliptical, ca. 3 times smaller than corpus bursae, connected to appendix bursae by narrow tubular ductus.

Distribution. Known only from Motuo County of the Xizang Autonomous Region of China.

Etymology. In Latin, ‘luxuriosus’ means ‘luxurious’. The specific epithet refers to the colourful forewing pattern and relatively large size.

Figures

Figures 1–8. Cyana spp.: adults. Depositories of the specimens: 1 and 2 in WIGJ; 3, 7 and 8 in MWM/ZSM; 4 and 6 in NHMUK (©The Trustees of NHMUK); 5 in MfN.

Figures 9–11. Cyana spp.: male genitalia. Depositories of the specimens dissected: 9 in WIGJ; 10 and 11 in MWM/ZSM.

Figures 12–14. Cyana spp.: female genitalia. Depositories of the specimens dissected: 12 in WIGJ; 13 and 14 in MWM/ZSM.