| Vertebral counts in modern amniotes, amphibians, and fish, can vary due to environment or change with growth. |
| In the handful of cases currently available for animals, namely lungfishes, amphibians, and conodonts, long-term stasis was found to be the rule. |
| Included among these vertebrates are sharks, bony fishes, amphibians, turtles, lizards, crocodiles, and dinosaurs. |
| On land amphibians and therapsids were both badly affected, while vascular plant diversity dropped by 50 per cent. |
| This is followed by a discussion of metamorphosis in insects and amphibians. |
| By one count, 1 in 3 of the 5,743 known species of frog, toad, salamander, and other amphibians are dwindling. |
