Question

Identify the therapsids. when were they most widespread?

Answer 1

Therapsids is a group of synapsids that includes mammals and their ancestors. Many of the traits today seen as unique to mammals had their origin within early therapsids, including having their four limbs extend vertically beneath the body, as opposed to the sprawling posture of other reptiles. they were everywhere around the world millions of years ago, during the ice age.