- Rostrum without an elevayed basal dorsal crest of teeth
- Pleura of fifth abdominal segment ending in a tooth
- Pandibular pulp present
- Endopod of first pleopod of male bears rudimentary appendix interna.
- Branchiostegal spine situated some distance below branchiostegal suture.
- Lower rostral teeth 4 to 6
- Rostrum with subterminal teeth