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Didigua
nigridorsum
sp. n.
Didigua nigridorsum
(paratype) |
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13mm. This species is very close to effusa and martini, and is
distinguished only by characteristics of the male. The hindwing is excavated in
a similar manner to that of martini, but with the anterior angle of the
excavation less produced. The dorsal zone is folded under to enclose a large,
blackish brush of hair-scales, observed from the dorsal surface as a somewhat
darkened ridge. The male genitalia are very similar to those of martini
except in the aedeagus vesica where the most basal two spines are set on a lobe
near the central one, rather than on the main tube halfway between the central
spine and the base of the vesica.
Holotype
.
BRUNEI: 300m, Ulu Temburong, rainforest, 10.2.80 (Lt. Col. M.G. Allen),
BM noctuid slide 16776.
Paratypes:
1
BRUNEI: 30-60m, Labi, lowland forest and secondary veg., 12.1.80 (Lt. Col.
M.G. Allen); 1
BRUNEI: 15m, Labi Road at Kpg Ratan, secondary veg., 28.8.79 (Lt. Col. M.G.
Allen); 1
Dutch West BORNEO: 85 miles above Pontianak (Simons et Meligan (Sanggan))
ex Janson, April 1909; 1
MALAYSIA: Sabah, Danum Valley, 170m, 4°58’N, 117°48’E (S.J. Willott) 2°
understorey, Bukit Atur Rd., DVFC, 3.ix.93.
Geographical range. Borneo.
Habitat preference. This is a rare lowland forest species that can persist
in secondary forest.
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