Retusa opima (Finlay, 1926) Height 3.3mm, Width 1.8mm Marine, Endemic Northland to Stewart Island ACFE. |
Retusa oruaensis (Webster, 1908) Height 4mm, Width 2mm Marine, Endemic North, South and Chatham Islands. In shell sand ACFME. |
Retusa striata (Hutton, 1873) Height 3mm, Width 2.5mm Marine, Endemic South Island, Stewart and Chatham Islands. Snares, Antipodes, Auckland and Campbell Islands CFMAnE. |