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Althonarosa dentijuxta sp. n.

Althonarosa dentijuxta

12-13mm. Externally this species is much like its congeners. It is more heavily marked on the forewing however, with the medial and basal shades obvious. The principal diagnostic features are in the male genitalia where the aedeagus has two apical spines but these are more slender than in horisyaensis, adjacent rather than opposite. The juxta is extended into a massive scoop like a lower jaw with teeth and a pilose interior. This juxta is more elongate in the only Peninsular Malaysia specimen seen which also has a more heavily shaded forewing.

Holotype SARAWAK: Gunong Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D. Holloway et al.) BM 1978-206, Site 20, Mar.-Apr., W. Melinau Gorge 150m, 422577, FEG 3, kerangas, understorey, BM limacodid slide 389.

Paratype. 2 as holotype (slide 263, venation); 2 same general data but Site 13, February, Camp 2, Mulu, 500m, 401464, mixed dipt. for.

Geographical range. Borneo, Peninsular Malaysia.

Habitat preference. The species was taken only during the Mulu survey, frequently at 500m on the Mulu transect, less so at 1000m (lower montane forest) on Mulu and in the kerangas type locality. The lower montane forest specimens were not retained so could conceivably have been A. cretacea.

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