Zemysia zelandica is a species of medium-sized marine bivalve mollusc in the family Ungulinidae. It is endemic to the waters off New Zealand and occurs at depths down to .
References
Further reading Powell A. W. B., William Collins Publishers Ltd, Auckland 1979 Morley, M. S., Photographic Guide to Seashells of New Zealand, New Holland Publishers (NZ) Ltd, 2004