The carapace is longer than broad, the front is somewhat flattened, and there is no spine at the cervical groove’s anterior end. Almost the same size and armature for helicopters. A rounded projection on the anterodistal border of the merus. Carpus serrated at the posterodistal end, with a short sharp spine and three blunt teeth on the dorsoanterior border. Ambulatory legs without spines, meri and carpi covered in fluffy setae. The posterior border of the propodus has four or five spines. The rear border of the dactylus has three moveable spines.