Paleontological Journal

, Volume 43, Issue 3, pp 237–250

Eotherapsid hypothesis for the origin of Monotremata

Authors

    • Borissiak Paleontological InstituteRussian Academy of Sciences
Article

DOI: 10.1134/S0031030109030010

Cite this article as:
Ivakhnenko, M.F. Paleontol. J. (2009) 43: 237. doi:10.1134/S0031030109030010
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Abstract

Comparative study of the cranial structures (lateral wall of the braincase, temporal and tympanic regions) of mammals and theromorphs shows that Monotremata evolved from the eotherapsid stem of theromorphs, while therian mammals are descendants of eutherapsids.

Key words

MonotremataTheromorphacranial morphology

Copyright information

© Pleiades Publishing, Ltd. 2009