(Figs. 51-53)
Material examined. Holotype ♂ from Tonkin [Vietnam], Frustorfer (NMW).
Adult habitus. General color dark brown. Other details obscured due to specimen condition.
Male. Forewing length 7 mm. Epiproct constricted in basal third, broader in apical third and slightly notched at apex in dorsal aspect (Fig. 51-52); ventral sclerite in lateral aspect produced into a prominent, semicircular structure armed with numerous spines (Fig. 51). Outer lobes of paraprocts heavily sclerotized, terminating in three prominent spines (Figs. 51, 53); mesal lobe sclerotized in basal half, and bearing a truncate apical point and a laterally directed acute point.. Tergum 10 with a patch of small anterior spines and tergum 9 with midlateral patches of small spines on either side of median U-shaped membranous area. Vesicle narrow basally, larger in apical half and slightly narrowed near apex (Fig. 53); hypoproct short and triangular in outline.
Female. Unknown.
Larva. Unknown.
Etymology. The species name refers to three acute processes on the outer paraproct lobes.
Diagnosis. See above under I. clavata.