| class | large class of higher fungi coextensive with subdivision Basidiomycota |
|---|---|
| class | oysters |
| class | true mosses: bryophytes having leafy rather than thalloid gametophytes: comprises orders Andreaeales |
| class | octopuses |
| class | tapeworms |
| class | in some classifications: contains only the order Charales |
| class | arthropods having the trunk composed of numerous somites each bearing one pair of legs: centipedes |
| class | algae distinguished chiefly by having flagella and a clear green color, their chlorophyll being masked little if at all by other pigments |
| class | cartilaginous fishes |
| class | all the yellow-green algae having flagella of unequal length |
| class | a class of mostly aquatic fungi |
| class | class of protozoa having cilia or hairlike appendages on part or all of the surface during some part of the life cycle |