Dimetrodon skull cast replica #1 Chordata and museum exhibits—including Ripley's Believe

and museum exhibits—including Ripley's Believe It or Not

although the term is now used more for the parent clade of the Ichthyosauria)

the lower one larger than the one between its eyes (about 3 feet (1 m) long)

Cushing contrasted sharply with co-star Alec Guinness in that he enjoyed his experience on the film

preserving key anatomical structures for educational or display purposes

Dimetrodon skull cast replica #1 Chordata and museum exhibits—including Ripley's BelieveDimetrodon, pronounced (die MET roh don) which means ("two measures of teeth" so named because it had a large skull with two different types of teeth; shearing teeth and sharp canine teeth, unlike reptiles. Dentition showing this differentiation of teeth is called heterodonty). Dimetrodon has a large sail which was probably used to regulate body temperature; the surface area would allow it to warm up or cool off more efficiently. Dimetrodon was not a