The division of the pituitary described above is typical of mammals, and is also true, to varying degrees, of all tetrapods. However, only in mammals does the posterior pituitary have a compact shape. In lungfish, it is a relatively flat sheet of tissue lying above the anterior pituitary, but in amphibians, reptiles, and birds, it becomes increasingly well developed. The intermediate lobe is, in general, not well developed in any species and is entirely absent in birds.
the division of the pituitary described above is typical of mammals and is also true to varying degrees of all tetrapods however only in mammals does the posterior pituitary have a compact shape in lungfish it is a relatively flat sheet of tissue lying above the anterior pituitary but in amphibians reptiles and birds it becomes increasingly well developed the intermediate lobe is in general not well developed in any species and is entirely absent in birds