THE FUNCTIONAL MORPHOLOGY OF THE CAMBRIAN UNIVALVED MOLLUSKS-HELCIONELLIDS

Abstract

The soft-body anatomy of helcionellids is reconstructed on the basis of a morphofunctional analyses of their shells. Evidently, two systems for the internal organization of helcionellids are possible: the first corresponds to that of the gastropodian class; the second, to that of the monoplacophorian.