Dyrosaurus

Dyrosaurus is a genus of extinct crocodylomorph that lived during the Early Eocene. The name Dyrosaurus comes from () the Greek for lizard or reptile, and Dyr for Djebel Dyr (mountain) close to where the type species was discovered. It was a large reptile with an estimated body length of .

== Species == left|thumb|Skull diagram of Dyrosaurus maghribensis Although the family Dyrosauridae is quite diverse and contains a variety of species, the genus Dyrosaurus has only two described species: D. phosphaticus and D. maghribensis. D. phosphaticus was first discovered in Algeria and Tunisia whereas D. maghribensis has only been found in Morocco. D. maghribensis differs from D. phosphaticus by several synapomorphies, most notably: a smooth dorsal margin of the parietal and widely opened choanae, interfenestral bar wide and strongly T-shaped instead of moderately T-shaped. In D. maghribensis the lateral and medial dorsal osteoderms are not sutured and have no serrated margin. The anterolateral margin of medial row of the dorsal osteoderms have a rounded lateral lobe and the lateral row of dorsal osteoderms are square in shape with rounded corners. In D. phosphaticus there are four longitudinal rows of square osteoderms that are thin and have shallow and wide pits. The osteoderms are square and the anterolateral margin of the medial dorsal osteoderms have an acute rounded process directed laterally.