Scleromochlus

Scleromochlus is an extinct genus of small ornithodiran from the Late Triassic period. A lightly-built cursorial animal, its phylogenetic position within Ornithodira has been debated; as different analyses have found it to be either the basal-most ornithodiran or the sister-taxon to Pterosauria.

Scleromochlus is a monotypic genus (single species), which is the type species S. taylori.

Scleromochlus taylori was about 186 mm (about 4.3 inches) long, with long hind legs; it may have capable of four-legged and two-legged locomotion.

Its fossils have been found in a Carnian formation in Lossiemouth, Scotland. The holotype is BMNH R3556, a partial skeleton preserved as an impression in sandstone; part of the skull and tail are missing.