Species: mixtecus REYNOSO, 1998
Etymology: For La Mixteca, the native name given to the broad geographical area were the Tlayua Quarry is located.

Holotype: Instituto de Geologia, Universidad Nacional Autonoma de Mexico, Catalogue no. IGM 7389

Locality: IGM-1995-NSF number 2, level H, quadrant 1/5, Tlayua Quarry, 2 km south-east of the Colonia Morelos, near Tepexi de Rodriguez, Puebla State, Mexico.

Horizon: Middle Member, Tlayua Formation.

Biostratigraphy:

Age: Middle or Late Albian Stage, middle Gallic subepoch, lower Cretaceous Epoch, Early Cretaceous.

Material: Crushed, but beautifully preserved complete skeleton.

Paratype: IGM 4185

Locality: IGM-1971-NSF number 1, level Z/10, quadrant 16/5, Tlayua Quarry, 2 km south-east of the Colonia Morelos, near Tepexi de Rodriguez, Puebla, Mexico.

Horizon: Middle Member, Tlayua Formation.

Biostratigraphy:

Age: Middle or Late Albian Stage, middle Gallic subepoch, lower Cretaceous Epoch, Early Cretaceous.

Material: Crushed but beautifully preserved skeleton of a juvenile lizard preserved in part and counterpart blocks. Limbs, girdles and the posterior part of the vertebral column are preserved in ventral view in one of the blocks; the broken head and the anterior part of the vertebral column are visible in dorsal view on the other. Some cartilaginous and soft tissues are preserved.