Alierasaurus
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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
Alierasaurus reconstruction
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
Synapsida
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Synapsida is a diverse group of tetrapod vertebrates that includes all mammals and their extinct relatives. It is one of the two major clades of the group Amniota, the other being the more diverse gro
Alierasaurus
…Alierasaurus is an extinct genus of caseid synapsid that lived during the early Middle Permian (Roadian) in what is now Sardinia. It is represented by a single species, the type species Alierasaurus…
Synapsid diversity 3
Skull of Cotylorhynchus, a basal synapsid
Diagram showing synapsid jaw evolution from early "pelycosaur" synapsids to modern mammals
The sea otter has the densest fur of modern mammals.