Pollex (Bilobiana) oculus, Fibiger, 2007

Fibiger, Michael, 2007, Revision of the Micronoctuidae (Lepidoptera: Noctuoidea). Part 1, Taxonomy of the Pollexinae, Zootaxa 1567 (1), pp. 1-116 : 64-65

Pollex (Bilobiana) oculus Fibiger, new species

( Plate 8 , figures 2–4; male genit. plate 18, figures 1, 2; female genit. plate 25, figure 2)

Material examined.

Holotype: male, Philippines, Balabac , Dalawan Bay, 8.x.1961, leg. Noona Dan Exp. 1961–62, genit. prep. 3502 M. Fibiger. Coll. ZMUC.

Paratypes: 10 males, 1 female: 7 males and 1 female with same data as holotype but 8–12.x.1961, male genit. preps 2948, 3488, 3500, 3504, 3530, 3542, 3543, female 3487 M. Fibiger. Colls. MF, ZMUC . 2 males, Philippines, Palawan, Bookes Point, Uring Uring , 19. and 27.ix.1961, genit. preps 2945, 5642 M. Fibiger. Colls. MF, ZMUC . 1 male, Philippines, Palawan, Aboabo , 134 km S Puerto Princessa, 14.xii.1965, leg. D. R . Davis , genit. prep. 5730 M. Fibiger. Coll. USNM .

Diagnosis.

Wingspan: 8–10 mm.

Forewing: narrow, light brown by medial area, rest of wing dark brown.

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

Reniform: distinct, whitish grey, outlined by a narrow black line.

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

Underside: unicolorous dark brown.

Male genitalia.

Tegumen: narrow.

Vinculum: short, stout.

Saccus: U-shaped, short.

Fultura superior: T-shaped with one narrow arm on each side, fused with upper middle part of tegumen and ventrally broadly with juxta-anellus; each horizontal arm with a prominent, spike-like, dorsoventrally directed process.

Valve: shorter than wide.

Ampulla: almost symmetrical, relatively short, subapically broadest; densely setose with long hair-like setae bent inwards.

Pollex : symmetrical, prominent, almost as long as ampulla, slightly upturned and almost equally broad throughout; subapically densely setose with long, hair-like setae bent inwards.

Digitus: almost symmetrical; relatively short, tapered, directed slightly ventrally, pointed apically.

Juxta-anellus plate: large, higher than wide.

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

Vesica: unarmed.

Female genitalia.

7 th abdominal segment: heavily sclerotised, asymmetrical.

Anterior apophyses: length 1½ of posterior apophyses.

Position of ostium bursae: medially in 7 th segment, slightly displaced to left.

Ostium bursae: heavily sclerotised all way round.

Antrum: short, cylindrical, heavily sclerotised.

Ductus bursae: membranous, long, 3 X longer than corpus bursae.

Corpus bursae: globular.

Appendix bursae: arising anteriorly from ductus bursae immediately after antrum.

Differential diagnosis.

P. oculus differs from other species by the almost symmetrical digitus, ampulla, and pollex, the spike-like processes from the fultura superior, the unarmed phallus, and the short cylindrical, heavily sclerotised antrum.

Figures

PLATE 8. Figures 1–8. Pollex subgenus Bilobiana species, adults. 1, P. (B.) angustiae, male holotype, Indonesia, Sumatra, Padang, Panjang; 2–4, P.(B.) oculus, male paratype, Philippines, Palawan, Aboabo, male holotype, Philippines, Balabac, Dalawan Bay, and male paratype, with same data; 5, P.(B.) bulli, male holotype, Philippines, Palawan, Brookes Point; 6, P.(B.) taurus, male holotype, Philippines, Mindanao, Cotabata S; 7, P.(B.) schintlmeisteri, male holotype, Indonesia, W Seram, Kamarlan; 8, P.(B.) hamus, male holotype, Philippines, Leyte, Ormoc.