[MM] Reigitherium bunodontum
DESCRIBER Bonaparte, 1990
TIME Cretaceous Late
SUBCLASS Incertae Sedis
ORDER Incertae Sedis
FOSSILSITE La Colonia Formation, Meseta de Somuncura, Chubut Province, Argentina
Los Alamitos Formation, Los Alamitos, Rio Negro Province, Argentina
Differs from other Mesozoic mammals including docodontans in that the lower molars decrease in length and notably increase in width posteriorly.
The Los Alamitos specimen was originally described (by Bonaparte, 1990) as an upper molar of dryolestid affinities. A second specimen described (by Pascual et al., 2000) from the Colonia Formation was represented by a dentary fragment with three worn teeth.