Sumida, S. S. Pelletier, V. Berman, D. S. 2014 New information on the basal pelycosaurian-grade synapsid <em>Oedaleops</em> 7-23 Early Evolutionary History of the Synapsida Springer Science Dordrecht Kammerer, C. F. Angielczyk, K. D. Frobisch, J. Reptilia Eothyris Oedaleops Cotylorhynchus Archaeothyris Ophiacodon Mycterosaurus Mesenosaurus Aerosaurus Varanops Varanodon Archaeovenator Watongia Elliotsmithia Osteology Maximum Parsimony Based on reanalysis of the original matrix. Sumida_etal_2014a