The Fray Bentos Formation is a DeseadanFray Bentos Formation at Fossilworks.org geologic formation of the Paysandú Group in Uruguay and portions of Argentina, corresponding to the Paraná Basin.Bond et al., 1998, p.42Tófalo & Morrás, 2009, p.680 It is composed of calcareous sandstones and siltstones with a pinkish-orange coloration. It outcrops in southwestern Uruguay (Canelones and Soriano Departments), the central and southeastern part of the province of Corrientes and northeast Entre Ríos.
Fossil content The following fossils have been reported from the formation: Mammals Taxa Species Presence Abundance Description Images ArgyrohyraxA. proavus An interatheriid CephalomyidaeCephalomyidae at Fossilworks.orgEopachyrucosE. ranchoverdensis An interatheriidFiandraiaF. romeii A notogulate of uncertain lineage Proborhyaena P. gigantea A sparassodont OligopternaO. orientalis A proterotheriid litoptern ProhegetotheriumProhegetotherium schiaffinoi at Fossilworks.orgP. schiaffinoi A hegetotheriidae notoungulate ProtypotheriumP. spScarrittiaS. robusta A leontiniidUrotheriumU. interundatumA dubious glyptodont UruguaytheriumUruguaytherium beaulieui at Fossilworks.orgU. beaulieui A fragmentary specimen An astrapotherian mammal Birds
Taxa Species Presence Abundance Description Images DevincenziaD. gallinaliDevincenzia gallinali at Fossilworks.org A phorusrhacid D. pozziDevincenzia pozzi at Fossilworks.org
See also List of fossiliferous stratigraphic units in Uruguay
References
Bibliography D. Perea, P. Toriño, and M. R. Ciancio. 2014. La presencia del Xenartro Palaeopeltis inornatus Ameghino, 1894, en la Formación Fray Bentos (Oligoceno Tardío), Uruguay. Ameghiniana 51(3):254-258 M. Ubilla, D. Perea, and M. Bond. 1994. The Deseadan Land Mammal Age in Uruguay and the report of Scarrittia robusta nov. sp. (Leontiniidae, Notoungulata) in the Fray Bentos Formation (Oligocene - ? Lower Miocene). Geobios 27(1):95-102