Afropisidium hodgkini (Suter, 1905) Width 4.5mm, Height 4mm Freshwater, Native - Endemic, Very thin, semitransparent, with the ligament externally visible North and South Island |
Euglesa novaezelandiae (Prime, 1862) Length 5.5mm, Height 4mm Freshwater, Native - Endemic, Similar shape but of smaller adult size than Sphaerium novaezelandiae, more inflated, with a deeper hinge-plate, stronger teeth, and the ligament is not visible externally North, South and Stewart Island |
Sphaerium novaezelandiae (Deshayes, 1854) Length 9mm, Height 7mm Freshwater, Native - Endemic, Ligament is visible externally North, South, Chatham and Auckland Islands |