Alierasaurus is an extinct genus of caseid synapsid that lived during the early Middle Permian in what is now Sardinia. It is represented by a single species, the type species Alierasaurus ronchii. Kn
Ungual phalanx (which supported a horny claw) of Alierasaurus ronchii in dorsal and right lateral views
The Torre del Porticciolo promontory, where the remains of Alierasaurus were discovered
Caudal vertebra of Alierasaurus ronchii in lateral, anterior and posterior views
Lalieudorhynchus is an extinct genus of caseid synapsids that lived during the Guadalupian in what is now Southern France. The genus is only known by its type species, Lalieudorhynchus gandi, which wa
Caudal vertebrae (cast) of Lalieudorhynchus gandi in lateral view.
Distribution of caseid synapsids in late Paleozoic Pangea
Distribution of caseid synapsids in late Paleozoic Pangea detail