Picrodon
Picrodon Temporal range: Late Triassic, Rhaetian PreꞒ Ꞓ O S D C P T J K Pg N | |
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Holotype tooth | |
Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Reptilia |
Clade: | Archosauromorpha |
Clade: | Archosauriformes |
Clade: | Archosauria |
Genus: | †Picrodon Seeley, 1898 |
Species: | †P. herveyi |
Binomial name | |
†Picrodon herveyi Seeley, 1898 |
Picrodon is the name given to a genus of archosaur, possibly a sauropodomorph dinosaur,[1] from the Rhaetian of England which was possibly synonymous with the dubious archosaur Avalonianus.[citation needed] The type, and only species, P. herveyi, was named in 1898.[2]
Discovery and naming
![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Picrodon_tooth_three_angles.png/250px-Picrodon_tooth_three_angles.png)
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.[3][2] Harry Govier Seeley described the fossils and named two genera: Avalonia (preoccupied; now Avalonianus) and Picrodon; both are based solely on teeth.[2]
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.[citation needed]
Classification
Sanford (1894)[3] classified Picrodon as a reptile, while Seeley (1898)[2] classified Picrodon as a saurian. More modern research however almost certainly places Picrodon within Archosauria;[citation needed] Peter Malcolm Galton (1985) suggested that Picrodon may have been a basal sauropodomorph. Currently, its exact phylogenetic placement within Archosauria remains unknown.[citation needed]
References
- ^ Galton, Peter M. (1985). "Notes on the Melanorosauridae, a family of large Prosauropod Dinosaurs (Saurischia: Sauropodomorpha)". Geobios. 18 (5): 671–676. Bibcode:1985Geobi..18..671G. doi:10.1016/s0016-6995(85)80065-6. ISSN 0016-6995.
- ^ a b c d H. G. Seeley. 1898. On large terrestrial saurians from the Rhaetic Beds of Wedmore Hill, described as Avalonia sanfordi and Picrodon herveyi. Geological Magazine, decade 4 5:1-6
- ^ a b Proceedings of the Somerset Archaeological Society - vol. xl, 1894, p. 234
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