Taxa named by an American paleontologist and biologist Alfred Romer (December 28, 1894 – November 5, 1973) and a specialist in vertebrate evolution. Romer was very keen in investigating vertebrate evolution. Comparing facts from paleontology, comparative anatomy, and embryology, he taught the basic structural and functional changes that happened during the evolution of fishes to primitive terrestrial vertebrates and from these to all other tetrapods. He always emphasized the evolutionary significance of the relationship between the form and function of animals and the environment.

Through his textbook Vertebrate Paleontology Romer laid the foundation for the traditional classification of vertebrates. He drew together the (then) widely scattered taxonomy of the different vertebrate groups and combined them in a simplified scheme, emphasizing orderliness and overview. Based on his research of early amphibians, he reorganised the labyrinthodontians. Romer's classification was followed by many subsequent authors, notably Robert L. Carroll, and is still in use.

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