Description

Lorica saccate, rather flexible, very weakly flattened dorso-ventrally, smooth. Antero-dorsal lorica margin with four spines with broad base, pointed, length variable, usually long, equal in length or median pair longest; posterior spines present or absent; with or without postero-median spines at foot opening. Trophi with all characteristics of the genus. A very polymorphous species, with many variants described.