Sentences with phrase «as cynodonts»

The most primitive mammals probably appeared in the late Triassic, descending from a mammal - like suborder of theraspid reptiles known as cynodonts.

Not exact matches

The prozonstrodontians form part of the larger group of therapsids, probainognathians, a group of cynodont (dog - like) therapsids that evolved a large cerebellum and lost the parietal foramen for the third eye (an organ on the skull roof that detects light for monitoring thermoregulation and daily rhythms such as sleep).

First, by the time Morganucodon was alive 190 million years ago, the brain was almost 50 % larger than in cynodonts, and areas that process smell, such as the olfactory bulb, were distinctly larger.

Then they compared the two endocasts with those for seven fossils of early cynodonts — carnivorous reptiles that are close relatives of the first mammals — as well as with endocasts for 27 other primitive mammals that lived between 65 million and 190 million years ago and with the brains of 270 living mammals.

Like other non-mammalian synapsids, therocephalians are described as mammal - like reptiles, although in fact, Therocephalia is the group most closely related to the cynodonts, which gave rise to the mammals.