Dinomyidae

Dinomyidae Temporal range: Early Miocene–Recent PreЄ Є O S D C P T J K Pg N
File:Josephoartigasia BW.jpg
Josephoartigasia
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Synapsida
Class:	Mammalia
Order:	Rodentia
Superfamily:	Chinchilloidea
Family:	Dinomyidae Peters, 1873
Genera
see text

Dinomyidae is a family of South American hystricognath rodents: the dinomyids were once a very speciose group, but now contains only a single living species, the pacarana. Several of the extinct dinomyids were among the largest rodents known to date, the bison-sized Josephoartigasia monesi and the smaller Josephoartigasia magna. The dinomyids are thought to have occupied ecological niches associated with large grazing mammals due to the lack of true ungulates in South America until its later connection to North America. The modern pacarana is only modest in size, considerably smaller than the capybara.

Neoepiblemidae, an entirely extinct family, may actually be part of Dinomyidae; both groups are undoubtedly closely related.

Genera

• Family Dinomyidae
  • †Pseudodiodomus incertae sedis
  • †Agnomys incertae sedis
  • Subfamily Eumegamyinae
    • †Doellomys
    • †Gyriabrus
    • †Briaromys
    • †Tetrastylus
    • †Phoberomys
    • †Colpostemma
    • †Orthomys
    • †Eumegamys
    • †Pseudosigmomys
    • †Pentastylodon
    • †Eumegamysops
    • †Telicomys
    • †Perumys
    • †Josephoartigasia
  • Subfamily Potamarchinae
    • †Scleromys
    • †Olenopsis
    • †Simplimus
    • †Eusigmomys
    • †Potamarchus
  • Subfamily Dinomyinae
    • Dinomys - pacarana
    • †Telodontomys