Journal article

Evolutionary trends in Triceratops from the Hell Creek Formation, Montana

Scannella, J. B.; Fowler, D. W.; Goodwin, M. B.; Horner, J. R. (2014)

Citation

Scannella, J. B.; Fowler, D. W.; Goodwin, M. B.; Horner, J. R. (2014). Evolutionary trends in Triceratops from the Hell Creek Formation, Montana. Proceedings of the National Academy of Sciences 111(28): 10245-10250. doi:10.1073/pnas.1313334111

Cited by genera

Triceratops
Documents a stratigraphic transition through the Hell Creek Formation from T. horridus (lower) through transitional morphologies to T. prorsus (upper), favored as primarily anagenetic.