Early Miocene cartilaginous fishes (Chondrichthyes: Holocephali, Elasmobranchii) from Chile: Diversity and paleobiogeographic implications

JOURNAL OF SOUTH AMERICAN EARTH SCIENCES

dc.creatorVillafana, Jaime A
dc.creatorNielsen, Sven Nikolaus
dc.creatorKlug, Stefanie
dc.creatorKriwet, Juergen
dc.date2021-08-23T22:50:20Z
dc.date2022-07-08T20:25:42Z
dc.date2021-08-23T22:50:20Z
dc.date2022-07-08T20:25:42Z
dc.date2019
dc.date.accessioned2023-08-22T02:48:22Z
dc.date.available2023-08-22T02:48:22Z
dc.identifier1150664
dc.identifier1150664
dc.identifierhttps://hdl.handle.net/10533/250589
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8312075
dc.descriptionThe early Miocene is characterized by warm conditions until the middle Miocene when temperatures dropped significantly. The presence of tropical to subtropical invertebrate faunas in early Miocene sediments of Chile supports the hypothesis of warm temperatures. The Neogene fossil record of chondrichthyans (holocephalans, sharks, rays and skates) has been well established for Chile. However, most studies focused on middle Miocene to Pliocene records, whereas early Miocene chondrichthyans have been rather poorly investigated up to now. The aim of this study is to describe early Miocene chondrichthyans from Chile and to discuss their paleobiogeographic and ecological implications. Here, we report seventeen chondrichthyan taxa from the early Miocene of Chile. The fauna includes the first fossil record of Mustelus from the Pacific coast of South America, the first oral tooth of Pristiophorus kunboldti nov. sp. from the Neogene of South America and the first fossil record of Alopias from the Neogene of Chile. We are able to increase the total number of taxa from the early Miocene of Chile from 13 to 21. Faunal shifts in the marine waters of Chile between the early Miocene and the present reveal different biogeographical dynamics: three taxa decreased their southern latitudinal range, seven increased their southern latitudinal range, six went globally extinct and one went regionally extinct. The extinction and latitudinal changes observed in chondrichthyans can be best explained by climatic fluctuations during the Neogene and Holocene along the Pacific coast of South America. However, studies to evaluate the effect of ecological traits should be considered in the future.
dc.descriptionRegular 2015
dc.descriptionFONDECYT
dc.descriptionFONDECYT
dc.languageeng
dc.relationhandle/10533/111557
dc.relationhandle/10533/111541
dc.relationhandle/10533/108045
dc.relationhttps://doi.org/10.1016/j.jsames.2019.102317
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 Chile
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/
dc.rightsinfo:eu-repo/semantics/article
dc.rightsinfo:eu-repo/semantics/openAccess
dc.titleEarly Miocene cartilaginous fishes (Chondrichthyes: Holocephali, Elasmobranchii) from Chile: Diversity and paleobiogeographic implications
dc.titleJOURNAL OF SOUTH AMERICAN EARTH SCIENCES
dc.typeArticulo
dc.typeinfo:eu-repo/semantics/publishedVersion


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