Didigua nigridorsum Holloway sp. n.
♂♂ 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.
Genitalia:
