Time | Group | (Subgroup) | Generic diversity |
---|---|---|---|
Extant | Sea snake | Â | 16 |
Sea turtle | 6 | ||
Sea krait | 1 | ||
Marine iguana | 1 | ||
Mesozoic | Sauropterygia | Placodontia | ca. 10 |
Plesiosauria | ca. 70 | ||
Others | ca. 20 | ||
Ichthyopterygia | ca. 40 | ||
Mosasauroidea | Mosasauridae | ca. 30 | |
 | Others | ca. 10 | |
Marine snakes* | Â | ca. 5 | |
Chelonioidea | Â | ca. 30 | |
Thalattosauria | Â | ca. 10 | |
Thalattosuchia | Â | ca. 10 | |
Marine Pleurodira | Â | ca. 10 | |
Marine Cryptodira | Â | ca. 10 | |
Pleurosauridae | Â | 2 | |
Hupehsuchia | Â | 2 | |
Qianosuchus | Â | 1 | |
Sikannisuchus | Â | 1 |