If you count all extinct creatures, you should use the above picture to classify them according to the shape of the temporal hole behind the skull that accommodates the masseter muscle.
They are Aperture, Diptera and Porphyra, among which Aperture is the most primitive, and the skull has no temporal hole, which is very similar to the ancestors of amphibians.
However, Diptera and foraminifera may have originated from Porphyra, or they may be multi-source, which is still controversial in paleontology.
In the above picture, red is a species that has survived to this day, but the advanced features such as constant temperature, second jaw, diaphragm, two atria and two ventricles are not the patents of mammals belonging to the lower phylum.
Most Diptera and Cologne species, including dinosaurs, birds and even crocodiles, independently evolved the above characteristics in a very early age.
For some common goals.
Faster growth
Faster response
Faster speed
Greater power
Higher IQ
These two branches independently evolved the same characteristics, which is called convergent evolution in biology. From the above picture, the relationship between birds and mammals is very far away.
In addition, the classification of turtles is still controversial at present. Turtles are divided into foraminifera and foraminifera, but from the recent biomolecular research, turtles are more inclined to be placed closer to Gulong.