Diversity and paleoenvironmental implications of an elasmobranch assemblage from the Oligocene-Miocene boundary of Ecuador
Carrillo-Briceño, Jorge Domingo (University of Zurich. Palaeontological Institute and Museum)
Villafaña Navea, Jaime A. (University of Vienna. Department of Paleontology)
de Gracia, Carlos (University of Vienna. Department of Paleontology)
Flores-Alcívar, F. Fernando (Universidad Estatal de la Peninsula de Santa Elena)
Kindlimann, René (University of Zurich. Palaeontological Institute and Museum)
Abella, Juan (Institut Català de Paleontologia Miquel Crusafont)

Date:	2020
Abstract:	The occurrence and diversity of elasmobranchs from the Oligocene-Miocene boundary from Tropical America is poorly known in comparison with the paleodiversity from younger Neogene intervals of the region. Here we describe a new elasmobranch assemblage from the rich fossil site of Montañita-Olón (Dos Bocas Formation, Santa Elena, Ecuador), where other vertebrates have already been described: for example, sea turtles and cetaceans. We report a total of 27 elasmobranch taxa, 19 of which are new fossil records for Ecuador, 10 new records for the Central Eastern Pacific and four new records for South America. Additionally, in order to reconstruct the environment where these marine remains were deposited, we performed abundance, paleobathymetric and habitat preference analyses, concluding that they were likely deposited in an outer neritic (open shelf) environment. The study of Oligocene and early Miocene marine elasmobranchs faunas in Tropical America is key to addressing the issues in the evolutionary history of this group.
Grants:	Ministerio de Economía y Competitividad CGL-2016-76431-P Ministerio de Economía y Competitividad CGL-2015-68333-P Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/BP-00223
Note:	Altres ajuts: Research Groups CSIC 64 1538 and CAM-UCM910607
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Eastern central pacific ; Neogene ; Sharks ; Rays ; Paleoenvironments ; Tropical America ; Fossils
Published in:	PeerJ, Vol. 8 (April 2020) , p. e9051, ISSN 2167-8359

DOI: 10.7717/peerj.9051
PMID: 32391203

27 p, 36.3 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Institut Català de Paleontologia Miquel Crusafont (ICP)
Articles > Research articles
Articles > Published articles