Telerpeton elginense Mantell, 1854 Leptopleuron is an extinct genus of procolophonid that lived in the dry lands during the late Triassic in Elgin of northern Scotland and was the first to be included in the clade of Procolophonidae.

The environment is also described to consist of barchan dunes due to the winds, ranging up to 20 m tall that spread during dry phases into flood plains.

[5] Discovered near Elgin, northern Scotland, from the Lossiemouth Sandstone in 1851, the fossil was examined and named Leptopleuron by Richard Owen.

Controversy arose later when news broke out that the discoverer asked English paleontologist Gideon Mantell to make a lengthier description of the fossil, calling it Telerpeton.

[6] Leptopleuron was a small, lizard-like animal of 270 mm that possessed a long tail[7] as well as gastralia in contrast to Sclerosaurus,[8] and a slight triangular depression on its jugal.

[7] Sharing similarities with other procolophonids, the braincase of Leptopleuron consists of a relatively long basisphenoid that covers the front part of the basioccipital.

On the other hand, the exoccipitals are at the dorsolateral portion of the condyle and its arch-like supraoccipital forms the most dorsal edge of the foramen magnum as it is integrated with the prootic located anterolaterally.

[13] Based on its dentition, Leptopleuron likely fed on coarse and fibrous vegetation or hard-shelled invertebrates as it possessed two-cusped marginal teeth that were labio-lingually spread out.

Analysis also suggests vegetation in its diet as a procolophonid because of its trunks being larger and wider than those belonging to Owenettidae, indicated by their slimmer body shape.

With an overbite aiding in less ingestion of dirt, along with spade-like unguals and strong limbs for efficient digging, Leptopleuron was likened to today's burrowers of Phrynosoma, a genus consisting of horned lizards.

Skepticism remains, however, due to both its manus and pes having slender phalanges and unguals compared to Procolophon, which is characteristically inefficient for dredging through dirt.