Etayoa is an ungulate of the family Carodniidae in the order Xenungulata that lived during the Early Eocene (~ 55 Ma) in northern South America.

Etayoa
Temporal range: Early Eocene (Riochican)
~55 Ma
Life restoration
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Xenungulata
Family: Carodniidae
Genus: Etayoa
Villarroel, 1987
Species:
E. bacatensis
Binomial name
Etayoa bacatensis

Etymology

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The genus of the type species Etayoa bacatensis was named by palaeontologist Carlos Villarroel after Fernando Etayo Serna, who contributed extensively to the paleontology and stratigraphy research in Colombia.[1] The species epithet bacatensis refers to Bacatá,[2] the name in Muysccubun for the main settlement of the southern Muisca Confederation; the name of which has been used for the current Colombian capital Bogotá, founded in a different location than the original Bacatá.

Description

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The type species fossil specimen consists of a partial mandible with teeth, found in the Bogotá Formation in the locality Ciudad Bolívar of Bogotá, Colombia.[3] The estimated size of the ungulate is the size of a dog.[4]

Paleoclimate and environment

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Paleogeography of Northern South America, 50 Ma
by Ron Blakey

The finds of iguanians, including the fossil record of hoplocercines, and boine, caenophidian, and ungaliophiine snakes in the Bogotá Formation indicate a tropical forest environment, present just before the Early Eocene Climatic Optimum (EECO).[5] The abundant paleosols of the Bogotá Formation show an increase in chemical weathering across the Paleocene-Eocene (P-E) transition; the Paleocene–Eocene Thermal Maximum.[6]

References

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  1. ^ (in Spanish) 2012 - Etayoa bacatensis, un mamífero de hace 55 millones - Paleontología en Colombia - accessed 21-04-2016
  2. ^ Villarroel, 1987
  3. ^ 1987 - Description of Etayoa bacatensis - Paleobiology Database
  4. ^ (in Spanish) 2011 - Un xenungulado del Paleoceno de la sabana de Bogotá - Paleontología en Colombia
  5. ^ Head et al., 2012
  6. ^ Morón et al., 2013

Bibliography

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  • Head, Jason J.; Bloch, Jonathan Ivan; Rincón, Aldo F.; Moreno Bernal, Jorge W. (2012), "Paleogene Squamates from the Northern neotropics: Ecological Implications and Biogeographic Histories (Abstract)", Journal of Vertebrate Paleontology, 72nd Annual Meeting of the Society of vertebrate Paleontology, At Raleigh, North Carolina: _, retrieved 2017-03-29
  • Morón, Sara; Fox, David L.; Feinberg, Joshua M.; Jaramillo, Carlos; Bayona, Germán; Montes, Camilo; Bloch, Jonathan Ivan (2013), "Climate change during the Early Paleogene in the Bogotá Basin (Colombia) inferred from paleosol carbon isotope stratigraphy, major oxides, and environmental magnetism (Abstract)", Palaeogeography, Palaeoclimatology, Palaeoecology, 388: 115–127, doi:10.1016/j.palaeo.2013.08.010, retrieved 2017-03-29
  • Villarroel A., Carlos (1987), "Características y afinadas de Etayoa n. gen., tipo de una nueva familia de Xenungulata (Mammalia) del Paleoceno Medio (?) de Colombia" (PDF), Comunicaciones Paleontológicas del Museo de Historia Natural de Montevideo, 19: 241–254, retrieved 2017-03-29

Further reading

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