A taxonomic review of the family Lymnaeidae (Mollusca : Gastropoda) in New Zealand

Abstract
DIAGNOSTIC features of Lymnaea stagnalis (Linnaeus, 1758), L. truncatula (Mueller, 1774), L. tomentosa (Pfeiffer, 1855), and L. columella Say, 1817, the four species recognised here as living in New Zealand, are presented. Lymnaea alfredi alfredi Suter, 1890 is synonymised with L. truncatula; L. tomentosa waikariensis (Cumber, 1941) is synonymised with L. tomentosa, and L. alfredi hamiltoni Dell, 1956 is made a subspecies of L. tomentosa.