Ponerosteus
| Ponerosteus Temporal range: Upper Cretaceous,
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| Holotype tibia of Ponerosteus (National Museum in Prague) | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | Archosauromorpha |
| Genus: | †Ponerosteus Olshevsky, 2000 |
| Species: | †P. exogyrarum
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| Binomial name | |
| †Ponerosteus exogyrarum | |
Ponerosteus is a dubious genus of archosauromorph which was first identified as "Iguanodon exogirarum" by Antonín Frič in 1878 for a specimen from the Cenomanian (Late Cretaceous of the Czech Republic, near Holubice by Kralupy nad Vltavou; Korycanar Formation[1][2]). He later (1905) renamed it Procerosaurus, unaware that this name was already in use (von Huene, 1902). It was renamed Ponerosteus exogyrarum (species name amended) by George Olshevsky in 2000; however, the taxon is considered a nomen dubium by most, as the type material is extremely poor, being apparently an internal cast of a tibia from an animal that may or may not be a dinosaur.[3] The name Ponerosteus can be translated as "bad", "worthless", or "useless bone", which accurately describes the nature of the material.[4]
References
- ^ Fritsch, 1905. "Synopsis der Saurier der böhm. Kreideformation" [Synopsis of the saurians of the Bohemian Cretaceous formation]. Sitzungsberichte der königlich-böhmischen Gesellschaft der Wissenschaften, II Classe. 1905(8), 1–7.
- ^ https://dinosaurusblog.com/2015/07/28/druhohorni-plazi-v-cechach-iv/ Article about Ponerosteus find (in Czech)
- ^ G. Olshevsky. 2000. An annotated checklist of dinosaur species by continent. Mesozoic Meanderings 3:1-157
- ^ George Olshevsky expands on the history of the taxon, on the Dinosaur Mailing List
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