The Tolomosa Formation, formerly known as the Tarija Formation, is a Pleistocene-age geologic formation found near Tarija, Bolivia.
Background Fossils of numerous large herbivorous mammals have been discovered, including toxodonts like Toxodon platensis, glyptodonts, ground sloths, and litopterns such as Macrauchenia patachonica. Numerous carnivorous mammals have been found, including Smilodon populator, Arctotherium tarijense, and Protocyon tarijensis. The uppermost portion of the formation is dated to the earliest Middle Pleistocene, dated to approximately 0.76±0.03 Ma and 0.72± 0.12 M based on Uranium–lead dating and helium dating respectively.
Paleofauna Birds Accipitriformes Accipitriformes Genus Species Family IntervalNotesVultur V. gryphus CathartidaeTarija Andean Condor Mammals Didelphimorphia Accipitriformes Genus Species Family IntervalNotesLutreolina L. crassicaudata DidelphidaeTarija Big lutrine opossum Cingulata Cingulata Genus Species Family IntervalNotesEuphractusE. sexcinctusChlamyphoridaeTarija <Tarija Six-Banded ArmadilloChaetophractusC. villosusChlamyphoridaeTarija Big Hairy ArmadilloDasypusD. tarijensisDasypodidaeTarija PropraopusP. cf. sulcatusDasypodidaeTarija GlyptodonG. reticulatusGlyptodontidaeTarija PanochthusP. spGlyptodontidaeTarija PampatheriumP. cf. humboldtiiPampatheriidaeTarija Proboscidea Proboscidea Genus Species Family IntervalNotes ImagesCuvieroniusC. tropicusGomphotheriidaeTarija Carnivorans Carnivora Genus Species Family IntervalNotesPseudalopex P. gymnocercus CanidaeTarija Pampas FoxAenocyonA.dirus CanidaeTarija Dire wolfChrysocyonC. brachyurus CanidaeTarija Maned wolfProtocyonP.troglodytes CanidaeTarija NasuaN.sp ProcyonidaeTarija ArctotheriumA. angustidens UrsidaeTarijaA. tarijense UrsidaeTarija A. wingei UrsidaeTarija ConepatusC.suffocans MephitidaeTarija An extinct hog-nosed skunkSmilodonS.populator FelidaeTarija Saber-toothed catPantheraP. onca FelidaeTarija JaguarHerpailurusH. yagouaroundi FelidaeTarija Jaguarundi
Artiodactyla Artiodactyla Genus Species Family IntervalNotes ImagesPlatygonusP. tarijensis.TayassuidaeTarija CharitocerosC. tarijensis.CervidaeTarija HippocamelusH. incognituss.CervidaeTarija PaleolamaP. weddeli.CamelidaeTarija LamaL. provicugnaCamelidaeTarija The Vicuña, a modern species of Llama Meridiungulata South American native ungulates Genus Species Family IntervalNotes ImagesMacraucheniaM. patachonica.MacraucheniidaeTarija ToxodonT cf. platensis.ToxodontidaeTarija Perissodactyla Perissodactyla Genus Species Family IntervalNotes ImagesTapirusT. tarijensisTapiridaeTarija HippidionH. principaleEquidaeTarija A browsing horseH. devilleiEquidaeTarija EquusE. neogeusEquidaeTarija
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