 "Limnoscelis" possessed several reptilian cranial homologies, including the closure of the otic notch and the development of a pterygoid flange on the palatal surface, while retaining a generalized amphibian-like postcranial morphology.Furthermore, it was noted that "Limnoscelis" shared many features with early Pelycosaurs like "Ophiacodon", particularly in its post-cranial skeleton.Others disagreed, citing differences in the postorbital bone, and arguing that a hypothetical ancestor of all amniotes should be small enough to efficiently produce the amniotic egg, with "Limnoscelis" having been too big to have been this ancestor.