Nasal horn base and holotype frill of Monoclonius crassus, AMNH 3998.
Informations
- Auteur
- Hatcher, J. B. , O. C. Marsh , and R. S. Lull
- Licence
- Public domain
- Source
- Wikimedia
Associé à
Nasal horn base and holotype frill of Monoclonius crassus, AMNH 3998.