Earth:Peligran

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The Peligran (Spanish: Peligrense) age is a period of geologic time within the Paleocene epoch of the Paleogene, used more specifically with South American land mammal ages (SALMA).[1] It may follow the Tiupampan and precede the Itaboraian or Riochican ages, though the exact sequence of Paleocene-Eocene SALMAs is still debated.[2][3] Radiometric dating of the upper Salamanca Formation suggests that the Peligran occupies an interval from about 63.8 to 63.2 million years ago,[4][5] which is several million years older than previous estimates.[2][6]

Etymology

The age is named after the paleontological site Punta Peligro (es) in Argentina.

Formations

Peligran is located in South America
Peligran
Peligran
Peligran
Peligran
Peligran
Peligran
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Locations of Peligran formations
Formation
bold is type 		Country Basin Notes
Salamanca Formation Argentina Golfo San Jorge Basin
[7]
Bogotá Formation Colombia Altiplano Cundiboyacense
[8]
Cerrejón Formation Colombia Cesar-Ranchería Basin
[9]
Chota Formation Peru Bagua Basin
[10][11]
Guaduas Formation Colombia Altiplano Cundiboyacense
[12]
Peñas Coloradas Formation Argentina Golfo San Jorge Basin
[7]
Santa Lucía Formation Bolivia Potosí Basin
[13]

Fossils

Group Fossils Formation Notes
Mammals Amphidolops yapa, Carodnia feruglioi, Notoetayoa gargantuai, Wainka tshotshe, Borhyaenidae indet., Eutheria indet. Peñas
Coloradas
[14][15]
[16]
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
[17][18]
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
[17][19]
Acherontisuchus guajiraensis, Anthracosuchus balrogus, Carbonemys cofrinii, Cerrejonemys wayuunaiki, Cerrejonisuchus improcerus, Pelomedusoides sp., Puentemys mushaisaensis, Titanoboa cerrejonensis Cerrejón
[20][21]
Crocodylia sp. Peñas
Coloradas
[15]
Fishes Dipnoi sp., Elopomorpha sp. Cerrejón
[20]
Flora Menispina evidens Bogotá
[22]

References

  1. ↑ "Peligran". https://paleodb.org/cgi-bin/bridge.pl?action=displayInterval&interval_no=738. 
  2. ↑ 2.0 2.1 Gelfo, Javier N.; Goin, Francisco J.; Woodburne, Michael O.; Muizon, Christian De (2009). "BIOCHRONOLOGICAL RELATIONSHIPS OF THE EARLIEST SOUTH AMERICAN PALEOGENE MAMMALIAN FAUNAS" (in en). Palaeontology 52 (1): 251–269. doi:10.1111/j.1475-4983.2008.00835.x. ISSN 0031-0239. https://onlinelibrary.wiley.com/doi/10.1111/j.1475-4983.2008.00835.x. 
  3. ↑ del Campo, Eric N.; Chimento, Nicolás R.; Agnolín, Federico L. (2026-05-04). "Postcranial remains of Eutherian mammals from Punta Peligro (Paleocene), Patagonia, Argentina" (in en). Historical Biology 38 (5): 1485–1499. doi:10.1080/08912963.2025.2537151. ISSN 0891-2963. https://www.researchgate.net/publication/394036180. 
  4. ↑ Clyde, W. C.; Wilf, P.; Iglesias, A.; Slingerland, R. L.; Barnum, T.; Bijl, P. K.; Bralower, T. J.; Brinkhuis, H. et al. (2014-03-01). "New age constraints for the Salamanca Formation and lower Rio Chico Group in the western San Jorge Basin, Patagonia, Argentina: Implications for Cretaceous-Paleogene extinction recovery and land mammal age correlations" (in en). Geological Society of America Bulletin 126 (3-4): 289–306. doi:10.1130/B30915.1. ISSN 0016-7606. https://pubs.geoscienceworld.org/gsabulletin/article/126/3-4/289-306/125989. 
  5. ↑ Woodburne, Michael O.; Goin, Francisco J.; Raigemborn, Maria Sol; Heizler, Matt; Gelfo, Javier N.; Oliveira, Edison V. (2014). "Revised timing of the South American early Paleogene land mammal ages" (in en). Journal of South American Earth Sciences 54: 109–119. doi:10.1016/j.jsames.2014.05.003. https://linkinghub.elsevier.com/retrieve/pii/S0895981114000649. 
  6. ↑ Woodburne, Michael O.; Goin, Francisco J.; Bond, Mariano; Carlini, Alfredo A.; Gelfo, Javier N.; López, Guillermo M.; Iglesias, A.; Zimicz, Ana N. (2014-03-01). "Paleogene Land Mammal Faunas of South America; a Response to Global Climatic Changes and Indigenous Floral Diversity" (in en). Journal of Mammalian Evolution 21 (1): 1–73. doi:10.1007/s10914-012-9222-1. ISSN 1573-7055. https://doi.org/10.1007/s10914-012-9222-1. 
  7. ↑ 7.0 7.1 Clyde et al., 2014, p.303
  8. ↑ Bayona et al., 2012, p.103
  9. ↑ Jaramillo et al., 2007, p.168
  10. ↑ Chacaltana et al., 2015, p.2
  11. ↑ Castro Medina, 2010, p.53
  12. ↑ Montoya & Reyes, 2005, p.54
  13. ↑ Sempere et al., 1997, p.709
  14. ↑ Bajo de la Palangana at Fossilworks.org
  15. ↑ 15.0 15.1 Cerro Redondo at Fossilworks.org
  16. ↑ Puerto Visser 2 at Fossilworks.org
  17. ↑ 17.0 17.1 Punta Peligro at Fossilworks.org
  18. ↑ Bonaparte & Morales, 1997, p.266
  19. ↑ Necrosuchus at Fossilworks.org
  20. ↑ 20.0 20.1 La Puente Pit at Fossilworks.org
  21. ↑ Anthracosuchus at Fossilworks.org
  22. ↑ Menispina evidens at Fossilworks.org

Bibliography

Peñas Coloradas Formation
Bogotá Formation
Cerrejón Formation
Chota Formation
Guaduas Formation
Salamanca Formation
Santa Lucía Formation

Template:SALMA



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