Class C

• class cephalopoda • class cestoda • class channidae • class charophyceae • class chilopoda • class chlorophyceae • class chondrichthyes • class chrysophyceae • class chytridiomycetes • class ciliata • class ciliophora • class coniferopsida • class crinoidea • class crustacea • class cryptophyceae • class cyanobacteria • class cyanophyceae • class cycadopsida • class cyclosporeae