i) Homodont - Animals whose teeth are similar in structure and function.
Eg. Cephalochordata, Fishes, Amphibian, Raptile.
ii) Hererodont - Animals whose teeth are dissimilar in structure.
Eg. Mammals
iii) Acrodont - Teeth at the upper side of jaw.
Eg. Cephalocordata, Fishes, Amphibian, Raptile
iv) pleurodont - Teeth at the side of jaw.
Eg. Raptile
v) Thecodont - Teeth at the completely enclosed in a deep socket of bone (base)
Eg. Mammals, Raptile (crocodile)
vi) Polyphycodont - Theeth that comes many times during whole life.
Eg. Acrodont, pleurodont
vii) Diphycodont - Teeth that cone twice during whole life.
Eg. 20 teeth of Humans
viii) Monophycodont - Teeth that comes only once during whole life.
Eg. (32-20) = 12 teeth of Humans