Hydroptila brigittae Gibon

(Figs 8, 9)

Hydroptila brigittae Gibon 1987b: 128, fig. 27.

Material examined. ANGOLA: 1 male, [CAW 855J, slide], Huila Province, Cubango River, Site 21—downstream of rapids at ruins of hydropower plant, at light, -14.3384, 16.29331, 15/v/2017, I.S. Ferreira .

Diagnosis. The male is distinguished from other African species, including the structurally similar H. zairiensis Statzner 1977 by the robustly bilobed dorsal plate. However, it differs from H. zairiensis by having each lobe more elongate, about twice length of inferior appendages, and narrowly hooked caudoventrad apically, rather than having an apical or subapical spur as in several other species, and inferior appendages short, stout, length about 3X width.

Remarks. In describing this species, Gibon (1987b) distinguished it from other Ivory Coast species by the absence of a branch on the inferior appendages, but so far no Angolan species have been found to have such a branch.

Distribution. Described from three specimens from Guinea, and now recorded from further south in southwestern Angola.