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Rhanidopsis alleni sp. n.

Rhanidopsis alleni

Rhanidopsis alleni

8-9mm. A male from Palawan in the Zoological Museum, University of Copenhagen, was taken originally to represent the type species, matching the females from Luzon in facies, but subsequently Dr K. Yazaki sent the author photographs of a male with similar facies from Luzon, and of its genitalia. The most distal fawn element of the postmedial banding is much narrower than in neophantes. The pale zone basal to this band on the forewing dorsum is much longer, semicircular, filling the space between the band and the base of the wing. The fawn costal and distal margins to the wings are narrower, less clearly defined. The male genitalia are twice as large as those of neophantes, but the lyre-like uncus is relatively more slender. The gnathus is apically bilobed rather than bifid. The valves taper more to a point, with the spinose apex of the costa coincident with the valve apex itself (this occurs in the Luzon male but the costal apex is well short of the valve apex in the Palawan male). The saccus of the Luzon male is squarish rather than triangular..

Holotype . SARAWAK: Gunung Mulu Nat. Park, R.G.S Exped. 1977-8 (J.D. Holloway et al.) Site 11, Camp 1, Mulu, 150m, 485470, mixed dipt. for. / river, BM geometrid slide 10633.

Paratypes: 1 BRUNEI, 30-60m, Labi, lowland forest, 28.8.79 (Lt. Col. M.G. Allen); 1 BRUNEI, 300m, Ulu Temburong, rainforest, 20.7.79 (Lt. Col. M.G. Allen).

Geographical range. Borneo, Sumatra (Heterocera Sumatrana collection).

Habitat preference. Three specimens have been taken in lowland dipterocarp forest.

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