Seymouriamorpha
plural noun
Sey·mour·i·a·mor·pha
: an order of Permian Labyrinthodontia comprising generalized forms exhibiting a mixture of amphibian and reptilian characters and possibly on the ancestral line of the true reptiles
Word History
Etymology
New Latin, from Seymouria, genus of Permian Labyrinthodontia (probably from the name Seymour + New Latin -ia) + -morpha