| A | B |
|---|
| Fish | vertebrate - 19,000 species |
| amphibians | vertebrate - 4,200 species |
| reptiles | vertebrate - 6,300 species |
| birds | vertebrate - 9,000 species |
| mammals | vertebrate - 4,000 species |
| sponges | invertebrate -10,000 species |
| stinging-cell animals | invertebrate - 10,000 species |
| flatworms | invertebrate - 20,000 species |
| roundworms | invertebrate - 25,000 species |
| segmented worms | invertebrate - 12,000 species |
| mollusks | invertebrate - 70,000 species |
| spiny-skinned animals | invertebrate - 6,100 species |
| arthropods | invertebrate - 1,073,400 species |
