| On land amphibians and therapsids were both badly affected, while vascular plant diversity dropped by 50 per cent. |
| It is even seen in a group of therapsids, the tritylodonts, which lived during the Jurassic. |
| In all but the role of small insectivore, omnivore, and rodent-like herbivore, the therapsids were eventually supplanted by the archosaurs. |
| The therapsids of this time belonged to several distinct lineages, none with clear antecedents. |
| One group of therapsids, the dicynodonts, were herbivores with a worldwide distribution. |
| This gap is all the more extreme because pelycosaurs and therapsids are each large, internally-diverse groups. |
