| Among these clades are such diverse forms as arawanas, knifefishes, mormyrids, eels, tarpon, and herring. |
| Therefore, we cannot support Durham's derivation of New World lunulate clades from an ancestor in common with protoscutellids, either. |
| Both the water ferns and Ceratopteris occur in clades with terrestrial ferns and the aquatic habit appears to be derived in these lineages. |
| All these taxa are relevant to the history of the conquest of land by vertebrates because they are outside the large clades of extant tetrapods. |
| Even the dentally unimaginative dinosaur clades often did better than this. |
| The 13 living genera are relicts of this earlier diversification and represent one of the four major clades of placental mammals. |
