Pollex (Bilobiana) diabolo, Fibiger, 2007

Fibiger, Michael, 2007, Revision of the Micronoctuidae (Lepidoptera: Noctuoidea). Part 1, Taxonomy of the Pollexinae, Zootaxa 1567 (1), pp. 1-116 : 72-73

Pollex (Bilobiana) diabolo Fibiger, new species

( Plate 9 , figure 5; male genit. plate19, figure 4)

Material examined.

Holotype: male, Philippines, Balawan , Mt. St. Paul , Babuyan, Cayasan, 5–6.iv.1995, leg. W. Mey, genit. prep. 3298 M. Fibiger. Coll. ZMHB.

Diagnosis.

Wingspan: 10 mm.

Forewing: narrow, light brown in medial and anterior part of subterminal areas, other areas of forewing blackish brown.

Transverse lines: brown; terminal line marked by black dots between veins.

Reniform: distinct, whitish grey, outlined by black.

Fringes: coloured like terminal area.

Hindwing: unicolorous grey brown with an indistinct black discal spot.

Underside: unicolorous grey brown.

Male genitalia.

Tegumen: narrow.

Vinculum: short, stout.

Saccus: U-shaped, short.

Fultura superior: Y-shaped with long narrow arms, fused medially with tegumen and ventrally fused broadly with juxta-anellus plate; from middle a single, very long, narrow, S-shaped, ventrally directed process arises.

Valve: shorter than wide.

Ampulla: almost symmetrical; long, very narrow, club-like; subapically densely setose with long, hair-like, inwardly bent setae.

Pollex : relatively short, finger-like on right side; left pollex broad medially, then tapered towards tip; both sides subapically densely setose with long, hair-like, inwardly bent setae.

Digitus: huge on right side, strongly curving ventrally, bifurcate towards apex; left ampulla short, apically pointed.

Juxta-anellus plate: higher than wide, hole for phallus positioned medially.

Phallus: long, curved, slightly tapered towards apex; coecum short and narrow.

Vesica: unarmed.

Differential diagnosis.

P. diabolo differs from other species by the long S-shaped process from the fultura superior, the strongly asymmetrical digitus, which is bifurcate, the right ampulla, which is club-like, and the pollex, which is medially broader on the left side.

Figures

PLATE 9. Figures 1–8. Pollex subgenus Bilobiana species, adults. 1, P.(B.) falx, male holotype, Indonesia, Sulawesi N, Dumoga Bone National Park; 2, P. (B.) spina, male holotype, Indonesia, Bali S, Sanur; 3, P. (B.) sansdigit, male holotype, Philippines, Mindanao, Mt. Apo; 4, P. (B.) paraspina, male holotype, Indonesia, Sulawesi S, Bantimurung; 5, P. (B.) diabolo, male holotype, Philippines, Palawan, Mt. St Paul; 6, P. (B.) spastica, male holotype, Philippines, Panay, Antiquo; 7, 8, P.(B.) mindanaoi, female holotype, Philippines, Mindanao, Sapamoro and the same, unspread.