Pollex (Bilobiana) sansdigit, Fibiger, 2007

Fibiger, Michael, 2007, Revision of the Micronoctuidae (Lepidoptera: Noctuoidea). Part 1, Taxonomy of the Pollexinae, Zootaxa 1567 (1), pp. 1-116 : 68-69

Pollex (Bilobiana) sansdigit Fibiger, new species

( Plate 9 , figure 3; male genit. plate 19, figure 3)

Material examined.

Holotype: male, Philippines, Mindanao , Mt. Apo School, 15 km SW Dawao, 500 m, 22-31.x.1965, leg. D. Davis, genit. prep. 5686 M. Fibiger. Coll. USNM.

Diagnosis.

Wingspan: 12 mm.

Forewing: relatively broad, dark brown.

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

Reniform: distinct, round, whitish grey, outlined by black.

Fringes: coloured like subterminal area.

Hindwing: very small, unicolorous dark brown, without a discal spot; ventral part of the hindwing transformed to a long log-like cylindrical tube (see species-group discussion above).

Male hindleg: covered with prominent, long, black, hair-like scales forming scent brush.

Underside: unicolorous dark brown.

Male genitalia.

Tegumen: narrow.

Vinculum: short, stout.

Saccus: U-shaped, short.

Fultura superior: T-shaped, broad, fused with upper middle part of tegument, ventrally fused broadly with juxta-anellus plate; each horizontal arm with a prominent, stout, apically blunt, ventrally directed process.

Valve: shorter than wide.

Ampulla: almost symmetrical; throughout its length totally fused with digitus; slightly broader subapically; densely setose with long, hair-like, inwardly bent setae.

Pollex : almost symmetrical; basal part broad, longer than ampulla; with a small dorsal spine subapically, and with inwardly directed setae.

Digitus: structure only apparently absent because digitus almost completely fused with ampulla; however, dorsal unscaled part and a tiny free tip on right side reveal presence of digitus.

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

Phallus: long, bent, slightly tapered from middle part towards apex; broadest by ductus ejaculatorius; coecum short and narrow.

Vesica: unarmed.

Differential diagnosis.

P. sansdigit differs from P. hamus by the almost completely fused ampulla-digitus, the process from fultura superior, the dorsal spine on the pollex, and the medially broad phallus.

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.