Visiana hyperctenista (Prout)

Schmidt, Olga, 2013, Review of the species of Visiana Swinhoe from the Papua New Guinea region (Lepidoptera: Geometridae: Larentiinae), Zootaxa 3693 (2), pp. 189-199 : 190-191

Visiana hyperctenista (Prout)

( Figs 7, 8 , 13 , 20, 21, 26, 30)

Xanthorhoe hyperctenista Prout, 1939: 257 .

Visiana hyperctenista (Prout) : Holloway, 1997: 192.

Type material. [ Papua New Guinea. Bismarck Archipelago]. Manam Island, Kar Kar Island. Lectotype male, Vulcan Island [ Manam Island], ASM, xi.1913 - i.1914 (BMNH); lectotype hereby designated. Paralectotypes: seven males, 3 females, same data as lectotype; one male, 1 female, Dampier Island [Kar Kar Island], ASM, ii.-iii.1914 (BMNH, examined).

Description. Labial palpi dark brown, with some light brown scales at base of basal and medial segments, and at the apex. Legs dark brown, without rings of lighter scales. Wing expanse 28-40 mm (n = 13). Forewings above dark brown, with median band in males relatively narrow, dark brown, in females rather indistinct, with a fine, medial projection shaped like a double-tooth, edged in males with a very thin, white wavy line, in females with white dots, with whitish postmedial wavy line, underneath brown, with a few medial, wavy, dark brownish lines, with an elongate blackish discal dot. Hind wings above coloured as forewings, dark brown in basal half, with fine, wavy, medial and postmedial white lines, underneath coloured and patterned as forewings ( Figs 7, 8 , 13 ). Male genitalia (Figs 20, 21). Uncus rather short, broad at base, tapering, apically narrowly rounded, somewhat triangular shaped, with lateral prominences at base; tegumen shortened, at base with rather short lateral arms directed towards the upper margin of juxta; valvae large, with costa sclerotised, with medium-sized, straight, finger-shaped, projecting apical process and with short, curved basal projection, with ventral margin slightly sclerotised, with a strong medial, hook-shaped prominence; saccus medium-sized, more or less triangular shaped; juxta with mediumsized, elongate lateral papillae; aedeagus very thick for the genus, with anellus covered with fine spines, with rounded lateral patches of inwardly directed spicules near the apex, without cornuti and with very fine scobination in vesica. Female genitalia ( Figs 26, 30 ). Antrum rather broad and short, almost parallel-sided, with a slightly sclerotised medial ring; ductus bursae medium-sized, broadened distally, narrowed proximally, with lateral stripes of heavier sclerotisation, corpus bursae in shape of boxing glove, membranous, with a rounded diverticulum, connected to corpus bursae close to the ductus by a medium-sized, thin tube, with ductus seminalis set medially on a prominent medial extension of corpus bursae; signum almost indistinct, a very small, proximal patch of fine, inwardly directed spicules.

Distribution. Papua New Guinea ( Bismarck Archipelago: Manam Island, Kar Kar Island). The Manam Island was created by the activity of the Manam Volcano, which is known as one of Papua New Guinea’s most active ones. The lower volcano slopes are vegetated, whereas the upper slopes are bare. The Manam Island was inhabited until 2004. Kar Kar Island has an active volcano in the middle.

Figures

FIGURES 1 – 8. Visiana spp., wings above: 1. V. variovinosa, male, sp. nov., Papua New Guinea, Kumusi River; 2. V. morobensis, male, sp. nov., Papua New Guinea, Morobe district; 3. V. r a n e n s i s, male, Moluccas, Buru, Rana; 4. V. grandivinosa, female, sp. nov., Papua New Guinea, New Britain, Mt Sinewit; 5. V. v i n o s a, male, Papua New Guinea, Upper Mambaré River; 6. V. ho r i st a, female, sp. nov., Papua New Guinea, Bougainville Island; 7. V. hyperctenista, male, Bismarck Archipelago, Vulcan Island; 8. V. hyperctenista, female, Bismarck Archipelago, Vulcan Island.

FIGURES 9 – 15. Visiana spp., wings underneath: 9. V. v i n o s a, male, Papua New Guinea, Upper Mambaré River; 10. V. morobensis, male, sp. nov., Papua New Guinea, Morobe district; 11. V. ranensis, male, Moluccas, Buru, Rana; 12. V. variovinosa, male, sp. nov., Papua New Guinea, Kumusi River; 13. V. hyperctenista, male, Bismarck Archipelago, Vulcan Island; 14. V. horista, female, sp. nov., Papua New Guinea, Bougainville Island; 15. V. grandivinosa, female, sp. nov., Papua New Guinea, New Britain, Mt Sinewit.

FIGURES 26 – 33. Visiana spp., female genitalia: (26 – 29) general view, (30 – 33) signum: 26, 30. V. hyperctenista; 27, 31. V. horista; 28, 32. V. grandivinosa; 29, 33. V. variovinosa.