Mammals did not evolve significantly during the Mesozoic period primarily due to the dominance of dinosaurs, which occupied many ecological niches and limited opportunities for mammals to diversify. Additionally, early mammals were small, nocturnal creatures that may have been outcompeted by larger reptiles for resources. The Mesozoic environment favored the reptiles' adaptations for larger size and varied diets, leading to a relatively slow evolutionary pace for mammals until the mass extinction event at the end of the Cretaceous, which allowed mammals to diversify and thrive.
In the Mesozoic Era, during the cretaceous period
Mammals made their first appearance during the Mesozoic era in the Triassic period. This period lasted from about 252 million years ago to 201 million years ago. Mammals evolved from their synapsid reptile ancestors during this time.
The mammals.
An amphitheriid is a member of the Amphitheriida, an order of mesozoic mammals of the Middle Jurassic period.
Mammals appeared in the late Triassic period about 220-230 million years ago.
Mammals became the dominant land animals in the early Paleocene period of the Cenozoic era, after the extinction of the non-avian dinosaurs at the end of the Cretaceous period of the Mesozoic era.
Allotheria are an extinct class of mammals that lived in the mesozoic period. They resembled large rats or modern opossums.
Mammals first evolved during the Mesozoic, the age of dinosaurs. After the dinosaurs died out, the Cenozoic began and mammals diversified until they dominated the land. Currently, we still live in the Cenozoic, so, technically, the Cenozoic could be called "the age of mammals."
In the Paleozoic period, animals such as trilobites, brachiopods, ammonites, and early vertebrates flourished. Plants included ferns, horsetails, and early seed plants. During the Mesozoic period, dinosaurs, marine reptiles like ichthyosaurs and plesiosaurs, as well as early mammals and birds were prevalent. Plants such as conifers, cycads, and ginkgoes thrived during this time.
The first dinosaurs AND the first mammals both appeared in the Triassic period From the Mesozoic era.
It really wasn't an era. An Era was a much longer period of time. It was called the "Jurassic Period".
I believe that dont know