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Redondasuchus
''Redondasuchus'' is an extinct genus of aetosaur. It may a junior synonym of ''Typothorax coccinarum'', another aetosaur. ''Redondasuchus'' is a member of the clade Typothoracisinae within the subfamily Aetosaurinae, and lived during the middle Norian stage of the Late Triassic. Material belonging to the genus has been found from the Redonda Formation in east-central New Mexico. The type species, ''R. reseri'', was named in 1991 after having been referred to as a species of ''Typothorax'' since 1985. A second species, ''R. rineharti'', was described in 2006.
==Description and species==
''Redondasuchus'' was first named with the description of the type species, ''R. reseri'', in 1991. ''R. reseri'' was named on the basis of isolated scutes found at Apache Canyon and Shark Tooth Hill in Quay County, New Mexico. ''R. rineharti'' was described in 2006 from several scutes and part of a right femur found from Apache Canyon.
While other aetosaurs have scutes covered in pits and grooves that often form radial patterns, the scutes of ''Redondasuchus'' are densely covered in pits and lack any patterning. The dorsal paramedian scutes (those that line the back) are unique in that they are angled approximately 45°. In other aetosaurs, the scutes arc smoothly around the back from the midline to the lateral scutes that lie below them and run along the side of the animal.〔
The dorsal paramedians of ''R. reseri'' are smaller than those of ''R. rineharti''. In both species, each paramedian possesses a keel on the underside that extends from the medial edge (the edge near the vertebrae) to the flexed area of the scute.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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