After Carroll, 1988, McKenna & Bell, 1997, and Shockey, 1997
<==o †Notohippidae Ameghino, 1894 |?- †Notohippus Ameghino, 1891 |?- †Interhippus |?- †Nesohippus |?- †Perhippidium |?- †Stilhippus |-- †Eomorphippus obscurus `--+--o †Eurygenium Ameghino, 1895 [Eurygeniops Ameghino, 1897; Morphippus Ameghino, 1897] | |-- †E. latirostris Ameghino, 1895 | |-- †E. pacegnum Shockey, 1997 | `?- †E. imbricatus (Ameghino, 1897) [Morphippus imbricatus Ameghino, 1897] |--o †Argyrohippus | |-- †A. praecox | `-- †A. fraterculus |--o †Rhynchippus | |-- †R. brasiliensis Soria & Alvarenga, 1989 | |-- †R. equinus | `-- †R. pumulis `-- †Pascualihippus boliviensis Shockey, 1997
Reference(s):
- Carroll, R. L., 1988: Vertebrate paleontology and evolution.
–W. H. Freeman and company, New York, 1988, 698 - Carroll, R. L., 1988: Appendix. 594-648
in Carroll, R. L., 1988: Vertebrate paleontology and evolution.
–W. H. Freeman and company, New York, 1988, 698 - McKenna, M. C. & Bell, S. K., (eds.) 1997: Classification of mammals – above the species level.
–Columbia University Press, New York, 1997, xii-631 - Shockey, B. J., 1997: Two new notoungulates (family Notohippidae) from the Salla beds of Bolivia (Deseadan: Late Oligocene): Systematics and functional morphology.
–Journal of Vertebrate Paleontology: Vol. 17, #3, pp. 584-599 - Shockey, B. J., Salas, R., Quispe, R., Flores, A., Sargis, E. J., Acosta, J., Pino, A., Jarica, N. J. & Urbina, M., 2006: Discovery of Deseadan fossils in the upper Moquegua Formation (late Oligocene-?early Miocene) of southern Peru.
–Journal of Vertebrate Paleontology: Vol. 26, #1, pp. 205-208