Most scientists, however, regard Darwinius as a typical member of the expansive adapiform evolutionary radiation.
The Late Devonian was characterized by a spectacular evolutionary radiation of Palmatolepis and its relatives.
This is a major evolutionary radiation and lots of new species have evolved that are clearly very similar to each other.
The evolutionary radiation believed to have given rise to the orders listed above in the Middle Carboniferous Period is thought to have also produced a paraneopterous stock, which formed the base for a new evolutionary radiation during the Permian Period.
The two latter groups existed prior to this time, but they had their earliest extensive evolutionary radiation during the Devonian.
In particular, mammals, which had existed for more than 100 million years before the advent of the Cenozoic Era, experienced substantial evolutionary radiation.
Isolated in the mid-Pacific, they underwent a remarkable evolutionary radiation, diversifying in the manner of the better-known Darwin's finches in the Galapagos Islands.
Despite being the oldest known tyrannosaurid, it's by no means a primitive member of the group, which tells us two interesting things: that tyrannosaurids started their evolutionary radiation sooner than we thought, and that a fair bit of their early record is still missing".
The order Salmoniformes was created to remove several diverse groups of dubious relationships from the order Clupeiformes; these groups were thus considered as the basal stocks in the evolutionary radiation of teleostean fishes.
Megatherium, largest of the ground sloths, an extinct group of mammals belonging to a group containing sloths, anteaters, glyptodonts, and armadillos that underwent a highly successful evolutionary radiation in South America in the Cenozoic Era (beginning 65.5 million years ago).
Moreover, many important modern groups first appeared in the fossil record during the Jurassic, and many important groups experienced high levels of diversification (a process known as evolutionary radiation).
