The Divisaderan age is a South American land mammal age, covering a period of geologic time (42.0–36.0 Ma) within the Middle and Late Eocene epochs of the Paleogene. It follows the Mustersan age and is followed by the Tinguirirican age.

Etymology

The age is named after the Divisadero Largo Formation of Divisadero Largo, Mendoza, Argentina.

Formations

Divisaderan is located in South America
Locations of Divisaderan formations
Formation bold is typeCountryBasinNotes
Divisadero Largo FormationArgentinaCuyo Basin
Abanico FormationChileAbanico Basin
Andesitas Huancache FormationArgentinaGolfo San Jorge Basin
Chota FormationPeruBagua Basin
Guabirotuba FormationBrazilCuritiba Basin
Leticia FormationArgentinaAustral Basin
Loreto FormationChileMagallanes Basin
Paracas GroupPeruPisco Basin
Pozo FormationPeruUcayali Basin
Sarmiento FormationArgentinaGolfo San Jorge Basin
Soncco FormationPeruEastern Peruvian Andes
Yumaque FormationPeruPisco Basin

Fossils

GroupFossilsFormationNotes
MammalsAcamana ambiguus, Adiantoides leali, Allalmeia atalaensis, Brachystephanus postremus, Groeberia minoprioi, G. pattersoni, Phoradiadius divortiensis, Xenostephanus chiottii, Trigonostylops sp., ?Notoungulata indet.Divisadero Largo
Proeocoleophorus carlinii, Machlydotherium sp., Meteutatus sp., Nemolestes sp., Parutaetus sp., Utaetus sp., Argyrolagoidea indet., Astegotheriini indet., Astrapotheria indet., Euphractinae indet., Notopithecidae indet., Oldfieldthomasiidae indet., Palaeothentoidea indet.Guabirotuba
Ocucajea picklingi, Supayacetus muizoni, Basilosauridae indet.Paracas
Cachiyacuy contamanensis, C. kummeli, Canaanimys maquiensis, Eobranisamys javierpradoi, Eocoleophorus glyptodontoides, Pozomys ucayaliensis, Pseudostegotherium chubutanum, cf. Eoespina sp., cf. Griphodon sp., cf. Perulestes sp., Rumiodon sp., Sasawatsu sp., Stegosimpsonia sp., ?Trigonostylops sp., Wamradolops sp., Archaeohyracidae indet., Bonapartherioidea indet., Borhyaenidae indet., Chinchilloidea indet., Cingulata indet., Didelphimorphia indet., Interatheriinae indet., Litopterna indet., Microchiroptera indet., Molossidae indet., Phyllostomatidae indet., Polydolopimorphia indet., ?Sudamericidae indet., Toxodontia indet.Pozo
Pseudocladosictis determinabile, Patene coluapiensis, Angelocabrerus daptes, Arminiheringia auceta, Caroloameghinia mater, C. tenuis, Coona gaudryi, Rosendolops primigenium, Polydolops crassus, P. serra, P. thomasi, Amphidolops serrula, Eudolops tetragonus, Pseudolops princeps, Progarzonia notostylopense, Ideodelphys microscopicus, Tonostylops spissus, Thomashuxleya rostrata, Coelostylodon caroloameghinoi, C. florentinoameghinoi, Acoelohyrax complicatissimus, Isotemnus colhuehuapiensis, I. primitivus, Anisotemnus distentus, Pleurostylodon crassiramis, P. modicus, P. similis, Homalostylops parvus, Notostylops bicinctus, N. murinus, Isostylops fretus, Catastylops deflexus, Eohyrax isotemnoides, E. praerusticus, Archaeopithecus fossulatus, A. rogeri, Maxschlosseria consumata, Oldfieldthomasia debilitata, O. parvidens, O. transversa, Ultrapithecus rutilans, Paginula parca, Transpithecus obtentus, Antepithecus brachystephanus, A. innexus, Notopithecus adapinus, Henricosbornia ?lophodonta, Acoelodus proclivus, Proectocion argentinus, P. precisus, Didolodus magnus, D. minor, D. multicuspis, Paulogervaisia inusta, P. mamma, P. porca, Ernestokokenia nitida, Albertogaudrya unica, ?Trigonostylops duplex, T. wortmani, Parutaetus chicoensis, P. clusus, P. signatus, Meteutatus percarinatus, Pseudostegotherium chubutanum, Prostegotherium astrifer, P. notostylopianum, Utaetus buccatus, U. deustus, U. lenis, Machlydotherium sparsum, Rutimeyeria conulifera Guilielmofloweria plicata, Anisolambda fissidens, Proplanodus adnepos, Periphragnis exauctus, Mazzoniphractus ingensSarmiento
Mystacodon selenensisYumaque
Reptiles & amphibiansCunampaia simplex, Ilchunaia parva, Barinasuchus sp.Divisadero Largo
?Balanerodus sp., cf. Sebecus sp., Anilioidea indet., Anura indet., Booidea indet., Caimaninae indet., ?Chelidae indet., Gavialoidea indet., Pipidae indet., ?Platynota indet.Pozo
Eocaiman cavernensis, ?Boa sp., ?Madtsoia sp., Crocodylomorpha indet.Sarmiento
BirdsSpheniscidae indet.Loreto
FishesIschyodus dolloi, Striatolamia macrota, Elasmobranchii indet.Loreto
Potamotrygon ucayalensis, ?Colossoma sp., cf. Leporinus sp., cf. Hydrolycus sp., Actinopterygii indet., Characiformes indet.Pozo
FloraChara (Grambastichara) tornata, Nitellopsis (Tectochara) latispiraPozo

Bibliography

General

Divisadero Largo Formation

Abanico Formation

  • Bertrand, Ornella C.; Flynn, John J.; Croft, Darin A.; Wyss, André R. (2012), , American Museum Novitates (3750): 1–36, doi:
  • Bradham, Jennifer; Flynn, John J.; Croft, Darin A.; Wyss, Andre R. (2015), , American Museum Novitates (3841): 1–24, doi:
  • Croft, Darin A.; Flynn, John J.; Wyss, André R. (2008), (PDF), Arquivos do Museu Nacional, Rio de Janeiro, 66: 191–211 2018-09-06 at the Wayback Machine
  • Engelman, Russell K.; Flynn, John J.; Gans, Philip; Wyss, André R.; Croft, Darin A. (2018), , American Museum Novitates (3918): 1–22, doi:
  • Godoy, Estanislao (2012), , Revista de la Asociación Geológica Argentina, 69: 570–577
  • Muñoz, Marcia; Fuentes, Francisco; Vergara, Mario; Aguirre, Luis; Nyström, Jan Olov; Féraud, Gilbert; Demant, Alain (2006), , Revista Geológica de Chile, 33: 109–140, doi:, hdl:

Andesitas Huancache Formation

Chota Formation

  • Chacaltana, César; Benites Cañote, Alexandra Lucytania; Valdivia, Waldir; Chumpitaz, Marco (2014), , Congreso Peruano de Geología, pp. 1–4

Guabirotuba Formation

  • Sedor, Fernando A.; Oliveira, Édison V.; Silva, David D.; Fernandes, Luiz A.; Cunha, Renata F.; Ribeiro, Ana M.; Dias, Eliseu V. (2017), (PDF), Journal of Mammalian Evolution, 24: 39–55, doi:

Leticia Formation

Loreto Formation

  • Bostelmann, Enrique; Le Roux, Jacobus P.; Vasquez, Ana; Gutiérrez, Nestor; Oyarzún, José Luis; Carreño, Catalina; Torres, Teresa; Otero, Rodrigo; Llanos, C. Mark Fanning, Sven N. Nielsen and Francisco Hervé, Andrea (2012), (PDF), XIII Congeso Geológico Chileno, pp. 698–700, archived from (PDF) on 2018-11-03{{citation}}: CS1 maint: multiple names: authors list (link)
  • Otero, Rodrigo A.; Torres, Teresa; Le Roux, Jacobus P.; Hervé, Francisco; Fanning, C. Mark; Yuri Yáñez, Roberto E.; Rubilar Rogers, David (2012), (PDF), Andean Geology, 39: 180–200, doi:
  • Sallaberry, M.A.; Yury Yáñez, R.E.; Otero, R.A.; Soto Acuña, S.; Torres, T.G. (2010), (PDF), Journal of Paleontology, 84 (6): 1061–1070, Bibcode:, doi:
  • Torres, T.; Meón, H.; Otero, R.; Galleguillos, H. (2009), (PDF), XII Congreso Geológico Chileno, pp. 1–4

Paracas Group

Pozo Formation

  • Antoine, P.O.; Marivaux, L.; Croft, D.A.; Billet, G.; Ganerod, M.; Jaramillo, C.; Martin, T.; Orliac, M.; Tejada, A. J. Altamirano, F. Duranthon, G. Fanjat, S. Rousse and R. Salas Gismondi, J. (2011), , Proceedings of the Royal Society B, 279 (1732): 1319–1326, doi:, PMC , PMID{{citation}}: CS1 maint: multiple names: authors list (link)
  • Boivin, Myriam; Marivaux, Laurent; Orliac, Maëva J.; Pujos, François; Salas Gismondi, Rodolfo; Tejada Lara, Julia V.; Antoine, Pierre-Olivier (2017), , Palaeontologia Electronica, 20 (1): Article number 20.1.19A

Sarmiento Formation

  • Acosta Hospitaleche, Carolina; Tambussi, Claudia (2005), (PDF), Revista Española de Paleontología, 20: 127–132 2021-01-22 at the Wayback Machine
  • Arnal, Michelle; Kramarz, Alejandro G.; Vucetich, M. Guiomar; Vieytes, E. Carolina (2014), , Journal of Vertebrate Paleontology, 34 (2): 397–406, Bibcode:, doi:, hdl:
  • Cheme Arriaga, Lucas; Dozo, María Teresa; Gelfo, Javier N. (2016), , Journal of Vertebrate Paleontology, 36 (6) e1229672, Bibcode:, doi:, hdl:
  • Dozo, María Teresa; Ciancio, Martín; Bouza, Pablo; Martínez, Gastón (2014), (PDF), Andean Geology, 41: 224–247, doi:
  • Pérez, María Encarnación; Krause, Marcelo; Vucetich, María Guiomar (2012), "A new species of Chubutomys (Rodentia, Hystricognathi) from the late Oligocene of Patagonia and its implications on the early evolutionary history of Cavioidea sensu stricto", Geobios, 45 (6): 573–580, Bibcode:, doi:
  • Shockey, Bruce J.; Flynn, John J.; Croft, Darin A.; Gans, Phillip; Wyss, André R. (2012), , American Museum Novitates (3737): 1–64, doi:
  • Sterli, Juliana; De la Fuente, Marcelo S.; Krause, J. Marcelo (2015), , Zoological Journal of the Linnean Society, 174 (3): 519–548, doi:, hdl:
  • Vucetich, M.G.; Dozo, M.T.; Arnal, M.; Pérez, M.E. (2015), , Historical Biology: An International Journal of Paleobiology, 27 (2): 236–257, Bibcode:, doi:, hdl:
  • Vucetich, María G.; Pérez, María E.; Ciancio, Martín R.; Carlini, Alfredo A.; Madden, Richard H.; Kohn, Matthew J. (2014), , Journal of Vertebrate Paleontology, 34 (3): 689–698, Bibcode:, doi:, hdl:
  • Wyss, André R.; Flynn, John J.; Croft, Darin A. (2018), , Journal of South American Earth Sciences, 3903: 1–42, hdl:

Soncco Formation

  • Carlotto, Víctor (2016), , XIII Congreso Peruano de Geología, pp. 521–524

Yumaque Formation

  • Lambert, O.; Martínez Cáceres, M.; Bianucci, G.; Di Celma, C.; Salas Gismondi, R.; Steurbaut, E.; Urbina, Mario; de Muizon, C. (2017), , Current Biology, 27 (10): 1–7, Bibcode:, doi:, hdl:, PMID