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Leptopleuron lacertinum

Leptopleuron was part of the family Procolophonidae; a group of small parareptiles that were abundant throughout the Late Permian to the Late Triassic Period living in what is now Europe, North America, Africa and perhaps Antarctica. Remains of Leptopleuron have been dated to the Upper Triassic (Norian) and are only known from the Lossiemouth Sandstone Formation of Scotland; it shared similar characteristics with the skull and mandible of Hypsognathus from New Jersey, North America of which Leptopleuron was closely related. Most of the material of Leptopleuron is represented by natural molds in sandstones; it would have been ‘armored’ and lived in the dry lands of the Triassic, it may have been strictly herbivorous although earlier procolophonids were insectivorous.   


Leptopleuron lacertinum


Owen, 1951

Meaning of the generic name


Length: 40 cm


Nearly complete articulated skeleton.

Age and Distribution

Late Triassic (lower Norian) Lossiemouth Sandstone Formation of Grampian, N.E. Scotland.


Anapsida Procolomorpha Procolophonoidea Procolophonidae Leptopleuroninae

  Further Reading

R. Owen. 1861. Palaeontology, or a Systematic Summary of Extinct Animals and their Geological Relations. Adam and Charles Black, Edinburgh 1-463.

H. D. Sues, P. E. Olsen, D. M. Scott, and P. S. Spencer  Cranial Osteology Of Hypsognathus Fenneri, A Latest Triassic Procolophonid Reptiles Fromd The Newark Supergroup Of Eastern North America. Journal of Vertebrate Paleontology 20(2):275–284, June 2000 by the Society of Vertebrate Paleontology.

  Synonyms   Telerpeton elginense Mantell, 1852

Life reconstruction of Leptopleuron lacertinum (© N. Tamura)