Head capsule pale yellow, body darkly pigmented, claws dark, procercus dark with light setae. Body length 4 mm, head capsule 264 µm.
Antenna 5 segmented, segment 2 membraneous, A.R. 1.25. Blade reaching tip of segment 2. Lauterborn organs and style not detected.
SI with 5 branches, remaining S setae simple. Labral lamellae small and simple.
Apical tooth long and needle-like, with 3 smal, pointed, inner teeth. Mola pointed. Seta subdentalis not detectable. Seta interna long and narrow.
Very characteristic with teeth light in colour and very numerous; lateral teeth fairly large but continuous with row of very small central teeth. Ventromental plate lying lateral to ventromentum and contiguous with it; without striations.
Palp reduced, but lacinial chaetae well developed.
Anterior parapods normal, claws simple. Procercus about as long as wide with 6 anal setae. Anal tubules short and pointed, much shorter than posterior parapod.
The curious mentum, ventromental plates and mandible of this putatuive larva of Kribiothauma are very distinctive.
Diagnosis after Harrison (2001).
Kribiothauma was described for pulchellum, a species from Kribi in West Africa (Cameroon), recognised subsequently from the distinctive male from Transvaal in South Africa. Harrison (2001) found adults from rivers in Kruger National Park, and Natal in South Africa. The larvae tentatively associated with these adults came from Klein Mooi River at the same time and place, and approximating K. pulchellum in size.