Atrichotoxon usambarense (Verdcourt, 1961)
Morphology:
External: Plain purple-brown body; small keel at tail tip; granular skin on mantle (Verdcourt & Polhill 1961).
Internal: No darts but ridges in dart sac; dart sac cylindrical, no retractor muscles (Verdcourt & Polhill 1961).
Size:
85 mm long and 13 mm wide dorsum, mantle 27 mm long (Verdcourt & Polhill 1961).
Distribution:
Tanganyika (Verdcourt & Polhill 1961).