Picrodon
Picrodon is the name given to a genus of archosaur, possibly a sauropodomorph dinosaur, from the Rhaetian of England which was possibly synonymous with the dubious archosaur "Avalonianus". The type, and only species, P. herveyi, was named in 1898. Discovery and naming. In 1894, W. A. Sanford described the fossil remains of what he considered to be two large reptiles discovered near Westbury-on-Severn, Glastonbury (Westbury Formation) by Eev. Sydenham H. A. Hervey and Sanford himself. Harry Govier Seeley described the fossils and named two genera: "Avalonia" (preoccupied; now "Avalonianus") and "Picrodon"; both are based solely on teeth . Only a single tooth, holotype BMNH R2875, belonging to "P. herveyi" is known, making the remains not sufficient enough to make judgments on its diet or its classification; although it is agreed that "Picrodon" was an archosaur to some degree. Classification. Sanford (1894) classified "Picrodon" as a reptile, while Seeley (1898) classified "Picrodon" as a saurian. More modern research however almost certainly places "Picrodon" within Archosauria; Peter Malcolm Galton (1985) suggested that "Picrodon" may have been a basal sauropodomorph. Currently, its exact phylogenetic placement within Archosauria remains unknown.