A 60-million-year Cenozoic history of western Amazonian ecosystems in Contamana, eastern Peru

dc.creatorAntoine, Pierre Olivier
dc.creatorAbello, María Alejandra
dc.creatorAdnet, Sylvain
dc.creatorAltamirano Sierra, Ali J.
dc.creatorBaby, Patrice
dc.creatorBillet, Guillaume
dc.creatorBoivin, Myriam
dc.creatorCalderón, Ysabel
dc.creatorCandela, Adriana Magdalena
dc.creatorChabain, Jules
dc.creatorCorfu, Fernando
dc.creatorCroft, Darin A.
dc.creatorGanerød, Morgan
dc.creatorJaramillo, Carlos
dc.creatorKlaus, Sebastian
dc.creatorMarivaux, Laurent
dc.creatorNavarrete, Rosa E.
dc.creatorOrliac, Maëva J.
dc.creatorParra, Francisco
dc.creatorPérez, María Encarnación
dc.creatorPujos, François
dc.creatorRage, Jean Claude
dc.creatorRavel, Anthony
dc.creatorRobinet, Céline
dc.creatorRoddaz, Martin
dc.creatorTejada Lara, Julia Victoria
dc.creatorVélez Juarbe, Jorge
dc.creatorWesselingh, Frank P.
dc.creatorSalas Gismondi, Rodolfo
dc.date2016
dc.date2020-09-18T18:29:11Z
dc.date.accessioned2023-07-14T22:21:57Z
dc.date.available2023-07-14T22:21:57Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/104972
dc.identifierhttps://www.sciencedirect.com/science/article/abs/pii/S1342937X15002543
dc.identifierissn:1342-937X
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7446626
dc.descriptionWeprovide a synopsis of ~60million years of life history in Neotropical lowlands, based on a comprehensive survey of the Cenozoic deposits along the Quebrada Cachiyacu near Contamana in PeruvianAmazonia. The 34 fossilbearing localities identified have yielded a diversity of fossil remains, including vertebrates,mollusks, arthropods, plant fossils, and microorganisms, ranging from the early Paleocene to the lateMiocene–?Pliocene (N20 successive levels). This Cenozoic series includes the base of the Huchpayacu Formation (Fm.; early Paleocene; lacustrine/ fluvial environments; charophyte-dominated assemblage), the Pozo Fm. (middle + ?late Eocene; marine then freshwater environments; most diversified biomes), and complete sections for the Chambira Fm. (late Oligocene–late early Miocene; freshwater environments; vertebrate-dominated faunas), the Pebas Fm. (late early to early late Miocene; freshwater environments with an increasing marine influence; excellent fossil record), and Ipururo Fm. (late Miocene–?Pliocene; fully fluvial environments; virtually no fossils preserved). At least 485 fossil species are recognized in the Contamana area (~250 ‘plants’, ~212 animals, and 23 foraminifera). Based on taxonomic lists from each stratigraphic interval, high-level taxonomic diversity remained fairly constant throughout themiddle Eocene–Miocene interval (8-12 classes), ordinal diversity fluctuated to a greater degree, and family/species diversity generally declined, with a drastic drop in the early Miocene. The Paleocene–?Pliocene fossil assemblages from Contamana attest at least to four biogeographic histories inherited from (i) Mesozoic Gondwanan times, (ii) the Panamerican realm prior to (iii) the time of South America’s Cenozoic “splendid isolation”, and (iv) Neotropical ecosystems in the Americas. No direct evidence of any North American terrestrial immigrant has yet been recognized in the Miocene record at Contamana.
dc.descriptionFacultad de Ciencias Naturales y Museo
dc.formatapplication/pdf
dc.format30-59
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.rightsCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.subjectCiencias Naturales
dc.subjectfossil record
dc.subjectpaleobiology
dc.subjectstratigraphy
dc.subjectpaleogeography
dc.subjectSouth America
dc.titleA 60-million-year Cenozoic history of western Amazonian ecosystems in Contamana, eastern Peru
dc.typeArticulo
dc.typeArticulo


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