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Historical relationship of the Caribbean and Amazonian Miocene ichthyofaunas; a hypothesis reviewed under a biogeographical approach
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|Authors:||Echeverry, Amparo; Gallo, Valeria|
|Author Affiliations:||Primary: |
Universidade do Estado do Rio de Janeiro (UERJ), Laboratorio de Sistematica e Biogeografia, Maracana, Brazil
|Source:||Geobios, 48(4), p.309-320. Publisher: Elsevier on behalf of Université Claude Bernard, Département des Sciences de la Terre, Lyon, France. ISSN: 0016-6995|
|Note:||In English. 125 refs.; illus., incl. 2 tables, sketch map|
|Summary:||South-American foreland basins are related to the compressional tectonics that built the Andes starting in the Mesozoic; then the Neogene uplift of the Eastern Cordillera directly affected the sedimentary history of Amazonia, changing the course of the proto-Amazon/Orinoco Rivers. Marine influence in South America has a long history with episodic transgressions and regressions from the Campanian to the Late Miocene, with the Caribbean and/or the Pacific connections considered as the most likely sources. Previous studies on Neogene fish assemblages regarding historical relationships of the Caribbean and Amazonian regions based their conclusions on non-biogeographical methods. Here, we analyze the distribution of 241 Miocene fish taxa from 32 lithostratigraphic units in northern South America and the Caribbean using a biogeographical method. We identify eleven distributional patterns and nine biogeographical nodes. Our results show a close relationship between the Caribbean and Amazonian Miocene ichthyofaunas. Furthermore, they indicate that this relationship has to be separated into two distinct components: western Amazonian/Caribbean, and eastern Amazonian/Caribbean. We hypothesize that patterns and nodes that involve the Pacific margin of northern South America or southern Central America reflect pre-Andean (older) geographical configurations pointing to the eastern Pacific as a relevant component in the history of diversification of Amazonian fish biota prior to and during the Neogene. Abstract Copyright (2015) Elsevier, B.V.|
|Subjects:||Amazonian; Biogeography; Cenozoic; Chordata; Fish; Miocene; Neogene; Tertiary; Vertebrata; Caribbean region; Pacific Basin; Pacific Ocean; South America; Cladogram|
|Coordinates:||S200000 N220000 W0430000 W0880000|
|Copyright Information:||GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands|
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