Systematics and Biogeography of Crocodylians from the Miocene of Panama

  title={Systematics and Biogeography of Crocodylians from the Miocene of Panama},
  author={Alexander K. Hastings and Jonathan I. Bloch and Carlos Jaramillo and Aldo F. Rinc{\'o}n and Bruce J. MacFadden},
ABSTRACT Despite the fact that fossil crocodylians have been recovered from the Panama Canal Zone starting with initial excavations in 1912, detailed studies have been lacking. Recent excavations of the canal have resulted in new discoveries of many vertebrate fossils, including the first known Miocene crocodylian skulls from Central America. These fossil skulls from the early-middle Miocene represent two new taxa with distinct morphology that is shared with extinct and extant caimans… 

Redescription and phylogenetic affinities of the caimanine Eocaiman cavernensis (Crocodylia, Alligatoroidea) from the Eocene of Argentina

A reassessment of E. cavernensis is presented, based on first‐hand examination and micro‐computed tomography of the holotype, and some aspects of its morphology are reinterpreted, providing evidence for a monophyletic Eocaiman genus within Caimaninae, even though some highly incomplete taxa represent significant sources of phylogenetic instability.

Lower Miocene alligatoroids (Crocodylia) from the Castillo Formation, northwest of Venezuela

Crocodyliform diversity was particularly high during the middle and late Miocene of South America, with up to 12 species recovered from a single geological unit. Nonetheless, the early Miocene fossil

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Enigmatic Crocodyliforms from the Early Miocene of Cuba

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The crocodylomorph fauna of the Cenozoic of South America and its evolutionary history: a review

The late Miocene caimanine fauna (Crocodylia: Alligatoroidea) of the Urumaco Formation, Venezuela

The late Miocene Urumaco Formation at Urumaco, Falcón state, Venezuela, is remarkably rich in extinct crocodylians, presenting a diversity hotspot in the Neotropics for the group. Herein, we revise

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Parsimony analysis of modified morphological taxon-character datasets coupled with a critical review of character evolution and published phylogenies reveals that fossil evidence for Palaeogene crown group and Late Cretaceous total-group representatives is unreliable due to uncertain character evolution in early Alligatoridae.



Plio-Pleistocene Crocodylus (Crocodylia) from southwestern Costa Rica

Abstract Mammal and reptile fossils were observed as a lag deposit along a 50 m stretch of a small creek in the Puntarenas Province of southwestern Costa Rica. The fossil deposit, known as El Indio,


Abstract Miocene land mammals are described from the Gaillard Cut Local Fauna based on a collection made by Stewart and Whitmore in the 1960s from Cucaracha Reach, former Canal Zone, Republic of

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ABSTRACT The marine vertebrate fauna collected from the Gatun Formation, middle Miocene of Panama, includes the following genera in the non-otolith assemblage: Carcharodon, Procarcharodon,

Mitochondrial DNA phylogeography of Caiman crocodilus in Mesoamerica and South America.

The molecular phylogenetic results identified five mtDNA haplotype clades with a mean sequence divergence of 3.4%, indicating considerable evolutionary independence among phylogeographic lineages, and confirm the status of C. c.

Ancient Nursery Area for the Extinct Giant Shark Megalodon from the Miocene of Panama

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