Transitional Ordovician Bivalve with Both Monoplacophoran and Lucinacean Affinities

Science  04 Dec 1964:
Vol. 146, Issue 3649, pp. 1293-1294
DOI: 10.1126/science.146.3649.1293


The rare and problematic Ordovician molluscan genus Babinka is a probable evolutionary link between the bivalve superfamily Lucinacea and some monoplacophora-like ancestral mollusc. Babinka provides the first direct evidence of a transition between the class Bivalvia and more primitive molluscan ancestors.