mesozoans

Example:The Mesozoic Era saw the rise of dinosaurs and the demise of the non-avian dinosaurs at the end of this period.

Definition:The geological era that spans from approximately 252 million years ago to 66 million years ago, characterized by the emergence and dominance of dinosaurs and the growth of conifer forests.

Example:During much of the Mesozoic Era, dinosaurs were the predominant land animals.

Definition:Of prime importance, or extravagantly prevalent

Example:The extinction of many species during the end of the Mesozoic Era marked the transition to the Cenozoic Era.

Definition:The act or process of ceasing to exist or the state of no longer existing