Family
Placodontidae Cope, 1871
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Chordata |
| Subphylum | Vertebrata |
| Organism group | Gnathostomata |
| Superclass | Tetrapoda |
| Class | Reptilia |
| Subclass | Eureptilia |
| unranked | Diapsida |
| Order | Sauropterygia |
| Family | Cyamodontidae |
| Nothosauridae | |
| Placodontidae | |
| Genus | Placodus |
| Plesiosaurus |
See also