Kryphioparma

Kryphioparma is an extinct genus of aetosaur from the Late Triassic Blue Mesa Member of the Chinle Formation, Arizona.

Comparison with aetosaurs that preserve more complete sets of armor then allowed to more precisely place the material along the body, which would suggest they came from either the trunk, the hip or the front most part of the tail region.

[1] The osteoderms are covered by large, oblong pits which are randomly oriented across the bones surface, clearly setting them apart from those of the related Typothorax and the phytosaur Redondasuchus.

On the right side towards the front of each individual osteoderm, the bone forms a noticeably protrusion referred to as the anterior bar, which is also seen in most aetosaurs but absent in Desmatosuchus.

Specifically, the presumed width:length ratio, well-developed anterior bar and ventral strut all suggest that it was a typothoracine, a relative of taxa such as Typothorax, Paratypothorax and Tecovasaurus.

The Thunderstorm Ridge locality within the Petrified Forest National Park is similarly diverse, likewise preserving Desmatosuchus, Calyptosuchus wellesi and Tecovasuchus chatterjeei.

Speculative life restoration of the related Typothorax