Classification Mollusca

opinions vary number of classes of molluscs; example, table below shows 8 living classes, , 2 extinct ones. although unlikely form clade, older works combine caudofoveata , solenogasters 1 class, aplacophora. 2 of commonly recognized classes known fossils.

classification higher taxa these groups has been , remains problematic. phylogenetic study suggests polyplacophora form clade monophyletic aplacophora. additionally, suggests sister taxon relationship exists between bivalvia , gastropoda. tentaculita may in mollusca (see tentaculites).

a genus called wiwaxia in mollusca.