Los Cephalomyidae son una familha escantilhada de rosegaires caviomòrfes d'America del Sud. Las relacions especificas dins la familha son pas seguras mas se son confirmadas d'afinitats entre de rosegaires chinchilloides e cavioides (McKenna and Bell, 1997; Vucetich et al., 1999; Kramarz, 2001, 2005). Fa gaire, Kramarz (2005) faguèt una analisi filogenetica qu'aviá coma resulta la relacion amb los Cavioidea, representats per los Eocardiidae. McKenna e Bell (1997), totun, foguèron pas d'acòrd e diguèron que la resulta èra pas vertadièra. Atal, situèron melhor lo genre dels cephalomyides, fins alavetz coneguts coma Dasyproctidae, mas Kramarz (2001) respondèt en tot confirmar las caracteristicas dels cephalomyides.
1) Kramarz, A.G. 2001. Revision of the family Cephalomyidae (Rodentia, Caviomorpha) and new cephalomyids from the early Miocene of Patagonia. Palaeovertebrata 30(1-2):51-88.
2) Kramarz, A.G. 2005. A primitive cephalomyid hystricognath rodent from the early Miocene of northern Patagonia, Argentina. Acta Palaeontologica Polonica 50(2):249-258. PDF fulltext
3) 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
4) Vucetich, M.G., Verzi, D.H., and Hartenberger, J.-L. 2001. Review and analysis of the South American Hystricognathi (Mammalia, Rodentia). Comptes Rendus de l'Académie des Sciences, Série IIA 329(10):763-769.
Cephalomyidae is an extinct family of caviomorph rodents from South America. The specific relationships of the family are uncertain, and affinities to both chinchilloid and cavioid rodents have been supported. Most recently, Kramarz in 2005 performed a phylogenetic analysis supporting a relationship to the Cavioidea, as represented by Eocardiidae, although more recent analyses have placed them among the chinchilloids as relatives of the giant neoepiblemid rodents.[2] McKenna and Bell (1997) questioned the validity of the family, placing the cephalomyid genera then known in Dasyproctidae, but Kramarz (2001) subsequently reasserted the distinctiveness of cephalomyids.
Fossils of the family have been found in Deseadan to Colhuehuapian Fray Bentos, Deseado, Cerro Bandera and Sarmiento Formations and the Colhué Huapí Member of Argentina and the Puca Group of Bolivia.[3]
Cephalomyidae is an extinct family of caviomorph rodents from South America. The specific relationships of the family are uncertain, and affinities to both chinchilloid and cavioid rodents have been supported. Most recently, Kramarz in 2005 performed a phylogenetic analysis supporting a relationship to the Cavioidea, as represented by Eocardiidae, although more recent analyses have placed them among the chinchilloids as relatives of the giant neoepiblemid rodents. McKenna and Bell (1997) questioned the validity of the family, placing the cephalomyid genera then known in Dasyproctidae, but Kramarz (2001) subsequently reasserted the distinctiveness of cephalomyids.
Fossils of the family have been found in Deseadan to Colhuehuapian Fray Bentos, Deseado, Cerro Bandera and Sarmiento Formations and the Colhué Huapí Member of Argentina and the Puca Group of Bolivia.
