10-12mm. Externally, this species appears inseparable from coelisigna,
but can be clearly distinguished from the genitalia of both sexes. In the male,
the squared uncus is narrower, the valves of more even width (not wider
centrally) and obtusely angled centrally (the apical half flexed ventrally)
rather than curved. The aedeagus vesica is narrow, tubular, and has a slender
apical cornutus that is very much smaller than that of coelisigna. The
grooves in the abdomen are less well developed, as mentioned in the diagnosis of
coelisigna. The female genitalia have segments 8-10 rather deeper than in
other species of the coelisigna group, and the ductus is much longer,
slender, sclerotised, the ductus seminalis arising from it relatively basally.
The bursa is large, pyriform, without a signum.
SARAWAK: Gunong Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D.Holloway et al.),
Site 2, January, Camp 4, Mulu, 1790m. 452463 [upper] montane (moss) forest, BM
noctuid slide 17502.
(slide 17498) general data as holotype but Site 15, February, Mulu, Camp 2.5,
1000m. 413461, lower montane forest; 1
(slide 17491) general data as holotype but Site 23, April. W. Melinau Gorge,
250m. 430558, FEG 4 limestone; 1G
(slide 17512) Sandakan (Pryer & Cator); 1E
(slide 17503) BRUNEI: 1618m, Bukit Retak, montane forest, 14.9.79 (Lt. Col.
M.G. Allen); 1
(slide 17497) BRUNEI: Ulu Temburong, Gn. Pagon, 1700m, iv.1981 (I. Gauld).
Geographical range. Borneo, Peninsular Malaysia (slide 17511), Bali (slide
This species is perhaps the least infrequent of
the five in Borneo, and is recorded from the lowlands to 1790m, being slightly
more frequent at altitude.
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