Homalocephalid

Example:The homalocephalids lived during the Triassic period, adapting to the environmental changes.

Definition:A geologic period and system that spans 50.9 million years from the end of the Permian Period 251.902 million years ago (Mya), to the beginning of the Jurassic Period 200.9 Mya.

Example:Some homalocephalids survived into the Jurassic period, where they coexisted with other therapsids.

Definition:A period of the Mesozoic era, spanning 56.3 million years from the end of the Triassic Period 200.9 million years ago (Mya), to the beginning of the Cretaceous Period 145.5 Mya.

Example:The homalocephalids are closely related to pelycosaurs and share many similar characteristics.

Definition:A group of synapsid reptiles that lived during the Middle to Late Permian and Triassic periods. They were among the first land/mobile vertebrates to have a distinct diapsid-like skull.

Example:Homalocephalids evolved from therapsids and are an important group in the study of mammalian evolution.

Definition:A group of synapsid amniote tetrapods, one of the evolutionary lines that led to mammals, and their ancestors.

Example:Caseosaurus, a well-known homalocephalid, had a relatively flat skull and is one of the best-studied of these early therapsids.

Definition:A genus of sauropsid reptiles that lived during the Early Jurassic, known primarily through fragmentary remains from eastern North America.