Shells of this family of bivalves are small to minute, thick, solid, often triangular in shape with well-defined radial ribs. The juvenile shell (prodissoconch) is retained at the rounded apex (umbo) in the adult shell and may be large relative to the size of the adult. Shell up to 3 mm across.
Studies by researchers overseas indicate that the young are incubated by the parent.
Mainly offshore waters, sometimes on subtidal sand flats.
- DSE Advisory List : Not listed
- EPBC Act 1999 : Not listed
- IUCN Red List : Not listed