Stagonolepis is an extinct genus of stagonolepidid aetosaur known from the Late Triassic (Carnian stage) Hassberge Formation of Germany, the Drawno Beds of Poland, and the Lossiemouth Sandstone of Scotland.

The peg-like teeth at the back of its mouth would have been suitable for chewing tough vegetation, including horsetails, ferns, and the newly evolved cycads.

According to paleontologist Dawid Dróżdż, "S. olenkae might have used its robust forelimbs to break through the compacted soil with its claws and proceed to dig in search of food in softened substrate with the shovel-like expansion at the tip of its snout.

[7] S. wellesi itself was originally named Calyptosuchus, a stagonolepidid from the Late Triassic Dockum Group of the United States, which was considered to be a species of Stagonolepis by Murray & Long in 1989.

However, most of the sequential studies conclude that both Aetosauroides and Calyptosuchus are valid and monotypic genera, the former occurs only in South America and the latter only in the United States.