 The relationship between "Limnoscelis" and amniotes was later expanded upon, with several features of the skull of "Limnoscelis" suggesting that it might not only be representative of the ancestor of all amniotes, but representative of the pre-synapsid condition as well.These included a large supratemporal bone contacting the postorbital anteriorly, and a line of weakness between the postorbital, supratemporal, and squamosal bones which could eventually develop into the temporal fenestra of synapsids.However, several authors argued against the validity of these characters.