👉 Tympanophorinae are a group of animals that include the following:
1.
Mammalia
(mammals)
2.
Reptilia
(reptiles, snakes, lizards)
3.
Chordata
(birds, mammals, reptiles, and insects)
4.
Arthropoda
(insects)
5.
Eutheria
(vertebrates)
Each of these groups share a common ancestor in the Cambrian period