Furthermore, the character is also polymorphic in synapsids, because caseids and varanopids have a quadratojugal contribution to the lateral temporal fenestra but eothyrids and ophiacodontids do not (Berman et al.
This is found in synapsids and basal captorhinids where the posterior margin of the skull is formed by the margins of the tabulars, the supratemporals and the parietals (Muller and Reisz, 2005; Reisz and Laurin, 2004).
The cranial anatomy and relationships of the synapsid Varanosaurus (Eupelycosauria: Ophiacodontidae) from the Early Permian of Texas and Oklahoma.
Among the reptilian ancestors of mammals, turbinal ridges appear to go back as far as early pelycosaurs, the oldest (Late Carboniferous and Early Permian Periods) and most primitive group of synapsid reptiles.
Examination of the nasal cavities of the ancestors of mammals, the synapsid reptiles, indicates that olfactory turbinals were very likely present at an early stage, among the earliest forms to diverge from the main reptilian ("sauropsid") lineage, and well before endothermy was likely to have evolved.
Synapsid phylogeny and the origin of mammalian endothermy.
This new species belongs to a group of animals called synapsids
Farmer, the study's principal author and an assistant professor of biology at the University of Utah, explained: "The real importance of this air-flow discovery in gators is it may explain the turnover in fauna between the Permian and the Triassic, with the synapsids
losing their dominance and being supplanted by these archosaurs.
By comparing the skeletal anatomy of related animals, Reisz and colleague Jorg Frobisch of the Museum fur Naturkunde and Humboldt-University in Berlin, discovered that Eocasea martini belonged to the caseid branch of the group Synapsid