The Peligran () age is a period of geologic time within the Paleocene epoch of the Paleogene, used more specifically with South American land mammal ages (SALMA). It may follow the Tiupampan and precede the Itaboraian or Riochican ages, though the exact sequence of Paleocene-Eocene SALMAs is still debated. Radiometric dating of the upper Salamanca Formation suggests that the Peligran occupies an interval from about 63.8 to 63.2 million years ago, which is several million years older than previous estimates.

Etymology The age is named after the paleontological site in Argentina.

Formations

Formation Country Basin Notes Salamanca Formation Argentina Golfo San Jorge Basin Bogotá Formation Colombia Altiplano Cundiboyacense Cerrejón Formation Colombia Cesar-Ranchería Basin Chota Formation Peru Bagua Basin Guaduas Formation Colombia Altiplano Cundiboyacense Peñas Coloradas Formation Argentina Golfo San Jorge Basin Santa Lucía Formation Bolivia Potosí Basin

Fossils Group Fossils Formation Notes Mammals Amphidolops yapa, Carodnia feruglioi, Notoetayoa gargantuai, Wainka tshotshe, Borhyaenidae indet., Eutheria indet. PeñasColoradas Derorhynchus aff. minutus, Escribania chubutensis, Escribania talonicuspis, Monotrematum sudamericanum, Peligrotherium tropicalis, Raulvaccia peligrensis, Requisia vidmari, Sudamerica ameghinoi, Didelphopsis sp., Polydolopimorphia sp., Bonapartheriidae, Metatheria indet., Placentalia indet., cf. Sparassodonta indet. Salamanca Reptiles &amphibians aff. Allognathosuchus sp., Hydromedusa cf. casamayorensis, Kawasphenodon peligrensis, Naiadochelys cf. patagonica, Necrosuchus ionensis, Peligrochelys walshae, Yaminuechelys maior, Caimaninae indet., Leptodactylidae indet., ?Pipidae indet. Salamanca Acherontisuchus guajiraensis, Anthracosuchus balrogus, Carbonemys cofrinii, Cerrejonemys wayuunaiki, Cerrejonisuchus improcerus, Pelomedusoides sp., Puentemys mushaisaensis, Titanoboa cerrejonensis Cerrejón Crocodylia sp. PeñasColoradas Fishes Dipnoi sp., Elopomorpha sp. Cerrejón Flora Menispina evidens Bogotá

References

Bibliography Peñas Coloradas Formation

Bogotá Formation

Cerrejón Formation

Chota Formation

Guaduas Formation

Salamanca Formation

Santa Lucía Formation