Eocardiidae

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Eocardiidae
Fossil range: Late Oligocene to Late Miocene

Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Rodentia
Suborder:	Hystricomorpha
Family:	†Eocardiidae Ameghino, 1891

Subfamilies and Genera

†Eocardiinae

†Chubutomys
†Phanomys
†Schistomys
†Eocardia
†Matiamys
†Neophanomys

†Luantinae

†Asteromys
†Luantus

The Eocardiidae are an extinct family of caviomorph rodents from South America. The family is probably ancestral to the living family Caviidae (Kramarz, 2006), which includes cavies, maras, and capybaras and their relatives. McKenna and Bell (1997) divided eocardiids into two subfamilies, Luantinae for two of the oldest genera (Asteromys and Luantus) and Eocardiinae for remaining genera. Kramarz (2006) has recommended the abandonment of these subfamilies, as the genera placed in Luantinae appear to represent basal eocardiids, rather than a specialized side branch. The latter hypothesis had been proposed by Wood and Patterson (1959).

[edit] References

Kramarz, A.G. 2006. Eocardiids (Rodentia, Hystricognathi) from the Pinturas Formation, late early Miocene of Patagonia, Argentina. Journal of Vertebrate Paleontology 26(3):770-778.
McKenna, Malcolm C., and Bell, Susan K. 1997. Classification of Mammals Above the Species Level. Columbia University Press, New York, 631 pp. ISBN 0-231-11013-8
Wood, A.E. and Patterson, B. 1959. Rodents of the Deseadan Oligocene of Patagonia and the beginnings of South American rodent evolution. Bulletin of the Museum of Comparative Zoology 120:281-428.

v • d • e Rodent Families

Sciuromorpha	†Allomyidae · Aplodontiidae · †Mylagaulidae · †Reithroparamyidae · Sciuridae · Gliridae

Castorimorpha	†Eutypomyidae · Castoridae · †Rhizospalacidae · †Eomyidae · †Florentiamyidae · †Heliscomyidae · Heteromyidae · Geomyidae

Myomorpha	†Armintomyidae · Dipodidae · †Anomalomyidae · †Simimyidae · Platacanthomyidae · Spalacidae · Calomyscidae · Nesomyidae · Cricetidae · Muridae

Anomaluromorpha	Anomaluridae · †Parapedetidae · Pedetidae

Hystricomorpha	†Tamquammyidae · †Gobiomyidae · Ctenodactylidae · Diatomyidae · †Yuomyidae · †Chapattimyidae · †Tsaganomyidae · †"Baluchimyinae" · †Bathyergoididae · Bathyergidae · Hystricidae · †Myophiomyidae · †Diamantomyidae · †Phiomyidae · †Kenyamyidae · Petromuridae · Thryonomyidae · Erethizontidae · Chinchillidae · Dinomyidae · †Cephalomyidae · Caviidae · Dasyproctidae · †Eocardiidae · Cuniculidae · Ctenomyidae · Octodontidae · †Neoepiblemidae · Abrocomidae · Echimyidae · Myocastoridae · Capromyidae · †Heptaxodontidae

Prehistoric rodents (incertae sedis)	†Eurymylidae · †Alagomyidae · †Archetypomyidae · †Cocomyidae · †Ivanantoniidae · †Laredomyidae · †Ischyromyidae · †Theridomyidae · †Protoptychidae · †Zegdoumyidae · †Sciuravidae · †Cylindrodontidae · †Zelomyidae

† indicates extinct taxa