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Temporal range: Late Triassic, Carnian
Life restoration of Scleromochlus taylori
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Archosauria
Clade: Avemetatarsalia
Family: Scleromochlidae
Huene, 1914
Genus: Scleromochlus
Woodward, 1907
Species: † S. taylori
Binomial name
Scleromochlus taylori
Woodward, 1907

Scleromochlus (Greek for "hard fulcrum") is an extinct genus of small avemetatarsalian from the Late Triassic period. A lightly built cursorial animal, its phylogenetic position has been debated; as different analyses have found it to be either the basal-most ornithodiran, the sister-taxon to Pterosauria, or a basal member of Avemetatarsalia that lies outside of Ornithodira.

Skeletal restoration
Two Scleromochlus

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

Scleromochlus taylori was about 181 mm (about 7.1 inches) long, with long hind legs; it may have been capable of four-legged and two-legged locomotion.

Its fossils have been found in the Carnian Lossiemouth Sandstone of Scotland. The holotype is BMNH R3556, a partial skeleton preserved as an impression in sandstone; part of the skull and tail are missing.[1]


  1. ^ Basic information from Fossilsmith