Mandibles and maxillae both present and toothed. Mandible without molar area, but typified by large projecting plate-like group of teeth. Ocelli eight to each side. PAO and furcula absent. Unguiculus absent or vestigial as a small mound of cuticular granules. Anal spines present. Setae mainly simple but some may be both finely serrate and finely clavate. Clavate tenent hairs present on tibiotarsi. Ant. IV with apical retractile knob and several types of sensory rods. Cuticle finely granulate and finely tuberculate.

Type species for the genus Spinanurida mandibulata n.sp.

This new genus is closely related to Setanurida, known at present only from East Africa, differing from this genus mainly through the presence of anal spines and the rather unusual morphology of the mandible. The toothlike projection on the mandible which consists of three teeth is very much more prominent than the large group of three basal teeth present on the mandible of Setanurida. The maxilla is very similar in morphology to that of Setanurida (Fig. 4).