Dysganus
| Dysganus | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Sauropsida |
| Superorder: | Dinosauria |
| Order: | Ornithischia |
| Infraorder: | Ceratopsia |
| Family: | Ceratopsidae |
| Genus: | Dysganus Cope, 1876 |
| Type species | |
| Dysganus encaustus Cope, 1876 | |
| Species | |
|
D. encaustus Cope, 1876 | |
Dysganus is the name given to a dubious genus of dinosaur from the Late Cretaceous. It was a ceratopsian. Its fossils have been found in Montana.
History
The species assigned to this dubious genus include Dysganus encaustus, D. bicarinatus, and D. peiganus, but are all tooth taxa, based solely on teeth. A fourth species, Dysganus haydenianus, is also known, based on ceratopsian teeth. All species were described by Edward Drinker Cope in 1876. In 1907, Hatcher redescribed the teeth of Dysganus, and found that the genus was a nomen dubium. The teeth of D. peiganus were thought to be from a stegosaurian by Lull and Wright in 1942.[1]
The types of each species consist of one to eight teeth, all being detached.
Classification
Cope (1876) originally classified Dysganus in Trachodontidae, a family of hadrosaurids from the Judith River beds.[2]
Paleoecology
The type species, D. encaustus, is known from the Judith River Formation (Cope, 1876). It lived alongside the dubious genera Palaeoscincus, Cionodon, Diclonius, and Monoclonius.[3]
See also
References
- ↑ Lull, R.S. & Wright, N.E. (1942). "Hadrosaurian Dinosaurs of North America". Geological Society of America Special Papers. 40: 27–28.
- ↑ Stanton, T.W.; Hatcher, J.B.; Knowlton, F.H. (1905). Walcott, C.D., ed. "Geology and Paleontology of the Judith River Beds: With a Chapter on Fossil Plants". United States Geological Survey Bulletin. 8 (157): 90.
- ↑ Cope, E.D. (1879). Hayden, F.V., ed. "The Relations of the Horizons of Extinct Vertebrata". United States Geological and Geographical Survey. 5 (1): 37–38.
- E. D. Cope. 1876. Descriptions of some vertebrate remains from the Fort Union Beds of Montana. Proceedings of the Academy of Natural Sciences of Philadelphia 28:248-261.