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Classification: Order Notoungulata; Suborder Typotheria

Stratigraphic Range: early Oligocene (Tinguirirican) to early Pleistocene (Marplatan)

Selected Genera: Hegetotherium, Hemihegetotherium, Paedotherium, Prohegetotherium, Propachyrucos, Pachyrukhos, Tremacyllus 

Selected References:

  • Cerdeño, E., and M. Bond. 1998. Taxonomic revision and phylogeny of Paedotherium and Tremacyllus (Pachyrukhinae, Hegetotheriidae, Notoungulata) from the late Miocene to Pleistocene of Argentina. Journal of Vertebrate Paleontology 18:799-811.
  • Croft, D.A., and F. Anaya. 2006. A new middle Miocene hegetotheriid (Notoungulata: Typotheria) and a phylogeny of the Hegetotheriidae. Journal of Vertebrate Paleontology 26:387-399.
  • Kramarz, A.G., and E.R. Paz. 2013. Un Hegetotheriidae (Mammalia, Notoungulata) basal del Mioceno temprano de Patagonia. Revista Mexicana de Ciencias Geológicas 30:186-195.
  • Reguero, M.A., and E. Cerdeño. 2005. New late Oligocene Hegetotheriidae (Mammalia, Notoungulata) from Salla, Bolivia. Journal of Vertebrate Paleontology 25:674-684.
  • Reguero, M.A., M.T. Dozo, and E. Cerdeño. 2007. A poorly known rodentlike mammal (Pachyrukhinae, Hegetotheriidae, Notoungulata) from the Deseadan (late Oligocene) of Argentina. Paleoecology, biogeography, and radiation of the rodentlike ungulates in South America. Journal of Paleontology 81:1301-1307.
  • Seckel, L., and C. Janis. 2008. Convergences in scapula morphology among small cursorial mammals: an osteological correlate for locomotory specialization. Journal of Mammalian Evolution 15:261-279.