Dysganus
Sign in to saveDysganus (dis-GANN-us) (meaning "rough enamel") is a dubious genus of ceratopsian dinosaur from the Campanian stage of the Late Cretaceous. The fossil teeth referred to Dysganus were first collected by Charles Sternberg from the Judith River Formation of Montana and later described by Edward Drinker Cope. All of the species are now seen as dubious ceratopsians, though referred material from tyrannosaurids and hadrosaurids were found in New Mexico.
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- taxon name
- Dysganus
- start time
- 80000000-0
- end time
- 75000000-0
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- Etymology
- History and species
- Classification
- Paleoecology
- References
Dysganus (dis-GANN-us) (meaning "rough enamel") is a dubious genus of ceratopsian dinosaur from the Campanian stage of the Late Cretaceous. The fossil teeth referred to Dysganus were first collected by Charles Sternberg from the Judith River Formation of Montana and later described by Edward Drinker Cope. All of the species are now seen as dubious ceratopsians, though referred material from tyrannosaurids and hadrosaurids were found in New Mexico.
== Etymology == The generic name Dysganus is derived from the Greek roots dys- meaning “bad” and -ganos for tooth enamel, the full name meaning “rough enamel”. The specific name for the type species, D. encaustus, means “burnt in” based on the concave tooth tip. The other species named by Cope have several meanings. D. bicarinatus means “two keels” after the 2 keels running down the length of the type teeth. D. haydenianus was named after American paleontologist and biologist Ferdinand V. Hayden. Lastly, D. peiganus was named after the Peigan Native Americans of Montana, where the type was found.