The Science of Nature

, 103:28

Review of the fossil matamata turtles: earliest well-dated record and hypotheses on the origin of their present geographical distribution

  • Gabriel S. Ferreira
  • Ascanio D. Rincón
  • Andrés Solórzano
  • Max C. Langer
Original Paper

DOI: 10.1007/s00114-016-1355-2

Cite this article as:
Ferreira, G.S., Rincón, A.D., Solórzano, A. et al. Sci Nat (2016) 103: 28. doi:10.1007/s00114-016-1355-2

Abstract

The matamata (Chelus fimbriatus) is a highly aquatic chelid turtle known exclusively from northern South America. Due to its extremely modified morphology, it is well circumscribed among living taxa, but that is not the case of the two extinct species ascribed to the taxon, Chelus colombianus and Chelus lewisi. These were originally described for the Miocene of Colombia and Venezuela, respectively, and are known mostly from post-cranial material. Few traits have been considered diagnostic for these fossil taxa, and their shared geographic and temporal distributions raise doubts about their distinctiveness. Here, we describe new turtle remains from the early Miocene Castillo Formation, at Cerro la Cruz, northwestern Venezuela, assigning them to C. colombianus. We also review the taxonomy and diagnostic features of the fossil species of Chelus, comparing them with the variation recognized within C. fimbriatus. All alleged differences between the fossil Chelus species were found in our sample of the extant species, and may represent intraspecific variation of a single fossil species. Further, we reviewed the fossil record of Chelus spp. and proposed a paleobiogeographic hypothesis to explain its present geographic range.

Keywords

Chelus Chelidae Miocene Venezuela Biogeography 

Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Gabriel S. Ferreira
    • 1
  • Ascanio D. Rincón
    • 2
  • Andrés Solórzano
    • 2
  • Max C. Langer
    • 1
  1. 1.Laboratório de Paleontologia de Ribeirão Preto, FFCLRPUniversidade de São PauloRibeirão PretoBrazil
  2. 2.Laboratorio de Paleontología, Centro de EcologíaInstituto Venezolano de Investigaciones Científcas (IVIC)CaracasVenezuela

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