| class | frogs |
|---|---|
| class | comprising flowering plants that produce seeds enclosed in an ovary |
| class | hornworts: in some classification systems included in the class Hepaticopsida |
| class | no alternation of generations the medusoid phase being entirely suppressed: sea anemones |
| class | one of two subgroups of Nematoda used in some classification systems |
| class | a large class of arthropods including spiders and ticks and scorpions and daddy longlegs |
| class | a class of Annelida |
| class | sometimes classified as an order: sea squirts |
| class | large class of higher fungi coextensive with division Ascomycota: sac fungi |
| class | sea stars |
| class | birds |
| class | marine and freshwater eukaryotic algae: diatoms |