Project 4550: M. D. Ezcurra, H. Sues. 2021. A re-assessment of the osteology and phylogenetic relationships of the enigmatic, large-headed reptile Sphodrosaurus pennsylvanicus (Late Triassic, Pennsylvania, USA) indicates archosauriform affinities. Journal of Systematic Palaeontology. 19 (24):1643-1677.