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Orothalassodes glabrosa sp.n

Orothalassodes glabrosa

17-21mm. This species can be distinguished from floccosa by the absence of long scales on the hindlegs. The buff zone on the underside of the hindwing dorsum is slightly more intensive. There are distinct differences in the male genitalia, indicating a relationship of both to O. simplex Warren. O. simplex has the eighth sternite more deeply and narrowly cleft, with a more marked process at the base of the valve costa. O. glabrosa has the eighth sternite only very shallowly excavate: there are no processes at the base of the valve costa, and the vinculum is less elongate than in either of the other two species.

Holotype  SARAWAK: Gunung Mulu Nat. Park, R.G.S Exped. 1977-8 (J.D. Holloway et al.) Site 3, January, Camp 4, Mulu, 1780m, 453463, [upper] montane forest, BM geometrid slide 16747.

Paratypes: 1  general data as holotype but Site 2; 1 BRUNEI: 1618m. Bukit Retak, montane forest, 14.9.79 (Lt. Col. M.G. Allen) slide 16746; 1 BRUNEI: 1670m, Bukit Pagon, montane forest, Feb 1982 (Allen & Harman), slide 8687.

Geographical range. Borneo.

Habitat preference. The species is common in upper montane forest. On G. Kinabalu it ranges from 1200m to as high as 2600m.

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