A prehistoric reptile ancestor is the therapsid.
therapsids
Styxosaurus was not a mammal. It is a prehistoric marine reptile.
Therapsida are a group of Synapsids that include mammals and their immediate evolutionary ancestors. Synapsids are a group of reptiles with fossils aging from 320 to 100 Mya. This group includes mammals and, mammal like reptiles. These animals are classified differently than Sauropsids (birds and reptiles) because they have a single opening in their skull behind each eye (temporal fenestra) which is also true of modern mammals. The best answer would be Therapsida.
it is a prehistoric lizard-like reptile.
There's a misconception at work here. The reptilian branch of evolution did not spawn the mammalian branch of evolution. You need to go back to the reptilian ancestor that was also a mammalian ancestor. We humans do have what is referred to as a reptilian brain, which is a small part of our whole brain.
The ISBN of National Geographic Prehistoric Mammals is 0792271343.
National Geographic Prehistoric Mammals was created in 2004.
No, an alligator is a reptile.
It is a monkey
reptile
t rex
They are warmblooded Mammals