alticrassa sp. n.
8-10mm. Externally this
species is very similar to crassa, but usually has a definite antemedial
fascia (obscure in crassa). The two can only be separated reliably
on genitalic characters. Males of both have the valve costa angled, but this
angle is more acute, more distal in alticrassa. In the aedeagus vesica crassa
has an elongate comb of spines whereas alticrassa has a much smaller
clump. In the female, there are much longer spines projecting posteriorly on
each side of the ostium. Only dissected material is included in the type series.
Gunong Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D. Holloway
et al.), Site 15,
February, Camp 2.5, Mulu, 1000m. 413461, lower montane f., BM arctiid slide
2776) as holotype; 1 (slide 5256 ) same
general data as holotype but Site 25,
April, G. Api, 900m. 427550, lower montane forest; 1 (slide 2753), 1 (slide 5257)
BRUNEI: 15m, Telisai, sandy heath forest and Gymnostoma,
3.2.1979 (Lt. Col. M.G. Allen); 1
(slide 5087) BRUNEI: Telisai, Gymno[stoma]
scrub, 10m, iv.91 (I.Gauld).
material has been taken in upper montane forest at 1000m on G. Mulu and at 900m
on G. Api, but the species occurs more rarely in the lowlands, particularly in
dry heath forest.
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