Ragadia latifasciata crystallina Monastyrskii & Vu, 2021

Monastyrskii, Alexander L. & Lien, Vu Van, 2021, New taxa and new records of butterflies from Vietnam (Lepidoptera, Papilionoidea), Zootaxa 5048 (4), pp. 486-510 : 500-502

Ragadia latifasciata crystallina Monastyrskii & Vu , subspec. nov.

( Figs. 10C–F )

Description: Male: length of forewing: HT 21 mm; PTs 23, 24, 21, 20 mm.

♂ Upperside ( Figure 10C–D ). Ground colour of both wings is black with two whitish bands on both wings; forewing with very wide postdiscal band which is broad at dorsum and gradually tapering toward the apex and ending near vein M 1; the thin subterminal fascia starting from vein 1A+2A and ends at vein M 3; terminal fascia barely noticeable; poorly visible basal and sub-basal fasciae starting from vein 1A+2A and extending to subcostal vein; hindwing white discal fascia starting from costal edge and gradually narrowing at dorsal edge; basal and subbasal fasciae very poor visible; narrow submarginal whitish fascia prominent.

Underside ( Figure 10E–F ). Ground colour of both wings blackish brown. Forewing pattern of fasciae similar to upperside, but all whitish fasciae prominent, and postdiscal whitish band reaches costal edge near apex; submarginal blackish area bears series of single yellow ringed ocelli from the cell R 4 to Cu 1a; there are two ocelli in the cell Cu 1b; every ocellus has a bluish pupil surrounded by a thick black ring. Hindwing pattern of fasciae similar to upperside, but all whitish fasciae prominent; broad submarginal blackish brown area bears series of oval ocelli in cells Cu 1b -Rs except cell M 1; the cell Cu 1b includes two ocelli.

Female: length of forewing: 2PTs 20, 24 mm.

♀ ( Figures 10E–F ). Both upperside and underside wing pattern similar to that in the ♂.

Male genitalia ( Figure 9B ) similar to the nominate subspec. latifasciata and other subspecies including critias and cristata from W. China, N. Vietnam and Thailand ( Lang, 2017).

Diagnosis. The new subspecies differs from the nominate subspecies and subspecies critias in the following characters: 1. Compared to the nominate subspecies, both sexes of crystallina have much narrower whitish postdiscal bands on both wings; 2. Similar to the nominate subspecies, the new taxon lacks an ocellus only in cell M 1, while subspecies critias lacks submarginal ocelli in cells M 1 and M 3.

Type material: Holotype: CENTRAL VIETNAM, ♂ Thua Thien Hue province , Bach Ma N.P., VII.2010, ALM leg . Paratypes: CENTRAL VIETNAM, 4♂ 2♀ Kon Tum province, Ngoc Linh N.P., Lo Xo pass, 24. V.2015; Kon Chu Rang N. R., 20–21. V.2015 .

Distribution. Central Vietnam: Ha Tinh province (Vu Quang N.P., Huong Son SFE), Thua Thien Hue province (Bach Ma N.P.); Quang Nam province (Saola N.R.), Kon Tum province (Ngoc Linh N.P.); Gia Lai province (Kon Ka Kinh N.P., Kon Chu Rang N.R.) ( Monastyrskii, 2005a).

Figures

FIGURE 9. Male genitalia of A—Ragadia latifasciata cristata Monastyrskii & Vu, subspec. nov. (northern Vietnam, Ha Giang province); B—R. l. crystallina Monastyrskii & Vu, subspec. nov. (central Vietnam, Thua Thien Hue province); C—R. l. critias Riley & Godfrey, (southern China, southern Yunnan)

FIGURE 10. A–B—Ragadia latifasciata critias Riley & Godfrey, 1921 stat. rev., ♂—southern China; C–D—R. latifasciata crystallina Monastyrskii & Vu, subspec. nov., ♂HT—central Vietnam, Thua Thien Hue province, Bach Ma N.P.; E–F—Ditto, ♀PT—central Vietnam, Kon Tum province.