Bassarona recta consonensis 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 : 495-496

Bassarona recta consonensis Monastyrskii & Vu , subspecies nov.

( Fig. 6 )

Description: Male. Length of forewing: ♂ HT 33 mm; ♂ PT 32.5; mm (n= 2)

Forewing upperside ( Figure 6A ). Ground colour of both wings is black with different tinges in some areas: basal and discal areas uniformly velvety black; submarginal and marginal areas on both wings slightly paler. Postdiscal band on both wings pale greenish yellow; shape of spots is more rectangular than oval; spaces between spots narrower than the vein thickness.

Forewing underside ( Figure 6B ) Ground colour is pale brown; middle of discal cell has a small round, red spot and a red lunular spot bordered with black; pale greenish postdiscal band bordered by brown; stroke-like submarginal black spots located within cell M 1, M 3 -Cu 1b.

Female: Length of forewing: ♀ PTs 39, 38, 35, 38.5 mm (n=4; x=37,63)

Forewing upperside ( Figure 6E ) Ground colour of both wings is dark brown; basal and discal areas uniformly dark brown; submarginal area out of postdiscal band pale brown with dark, nearly black medial band; spaces between spots on postdiscal band between cells M 2 and Cu 1b not broader than thickness of a vein. Forewing underside ( Figure 6F ) Ground colour of both wings brown; shape and colour of markings similar to the upperside.

Diagnosis. In the new subspecies, the ground colour on the upperside of both wings is slightly darker than in individuals from the Vietnam mainland. The yellowish postdiscal band is similar in shape and colour to individuals from the mainland; however, it is slightly broader and the spaces between neighbouring spots are narrower than the thickness of a vein. In ♂♂, spots in cells Cu 1a and M 3 are more rectangular than the ovoid shapes found in other subspecies ( Figures 6C–D ), while in ♀♀ the shape of spots in cells Cu 1a and M 3 is more rectangular than oval. Spaces between spots in cells M 1 –Cu 1a are absent, whereas these spaces are much broader in individuals from the Vietnam mainland ( Figures 6G–H ).

Type material: Holotype: SOUTHERN VIETNAM, ♂ Ba Ria – Vung Tau province , district, Con Dao N.P., Hon Ba Is. 26.III.2015, ALM leg. (CD-092) . Paratypes ♂ ♀ —SOUTHERN VIETNAM, Ba Ria– Vung Tau province , Con Son Is., road to Thanh Gia top, ~ 300 m asl, 24.III.2015, ALM leg. (CD-246, 249) ; 2♀ —Ba Ria– Vung Tau province , Con Son Is., near Headquarters of the National Park, 23.III.2015, ALM leg. (CD—27, 153) ; ♀ —SOUTHERN VIETNAM, Ba Ria– Vung Tau province , Con Son Is., VI.2010, ALM leg .

Distribution: The new subspecies is distributed only in the Con Dao Archipelago: Con Son Is. and Hon Ba Is.

Figures

FIGURE 6. Postdiscal band on the forewing in the male of: A–B—Bassarona recta consonensis Monastyrskii & Vu subspec. nov.—HT♂, Con Son Is. (southern Vietnam); C–D—B. recta monilis Moore; Cat Tien N.P. (southern Vietnam, Dong Nai province); postdiscal band on the forewing in the female of: E–F—Bassarona recta consonensis Monastyrskii & Vu subspec. nov.—PT♀, Con Son Is. (southern Vietnam); G–H—B. recta monilis Moore; Cat Tien N.P. (southern Vietnam, Dong Nai province)