Paleocene resurrection of a crocodylomorph taxon: Biotic crises, climatic and sea level fluctuations

  title={Paleocene resurrection of a crocodylomorph taxon: Biotic crises, climatic and sea level fluctuations},
  author={St{\'e}phane Jouve and Nour-Eddine Jalil},
  journal={Gondwana Research},
  • S. JouveN. Jalil
  • Published 15 May 2020
  • Geography, Environmental Science
  • Gondwana Research

New data on the Dyrosauridae (Crocodylomorpha) from the Paleocene of Togo

The longirostrine crocodyliforms from Bolivia and their evolution through the Cretaceous–Palaeogene boundary

A new phylogenetic analysis suggests that Vectisuchus leptognathus and Elosuchus are more closely related to Dyrosauridae, and a new name, Dyrosauroidea, is proposed for this clade.

First and most northern occurrence of a thalattosuchian crocodylomorph from the Jurassic of the Isle of Skye, Scotland

The Jurassic was a key interval for the evolution of dinosaurs, crocodylomorphs and many other vertebrate groups. In recent years, new vertebrate fossils have emerged from the Early–Middle Jurassic

First record of a tomistomine crocodylian from Australia

Australia’s first tomistomine crocodylian is described, Gunggamarandu maunala gen. et sp.

Ecological opportunity and the rise and fall of crocodylomorph evolutionary innovation

This macroevolutionary study of skull and jaw shape disparity shows that crocodylomorph ecomorphological variation peaked in the Cretaceous, before declining in theCenozoic, and the rise and fall of disparity was associated with great heterogeneity in evolutionary rates.

A New Sebecid Mesoeucrocodylian from the Paleocene of Northwestern Argentina

ABSTRACT A new crocodyliform, Sebecus ayrampu, sp. nov., is described based on the rostral region of the skull, mandibular rami, and a distal portion of the femur collected in Paleocene rocks of

Expanded Sampling Across Ontogeny in Deltasuchus motherali (Neosuchia, Crocodyliformes)

The authors provide a revised diagnosis of this species, describing the new material and discussing incidents of apparent ontogenetic variation across the sampled population, which situate Deltasuchus within an endemic clade of Appalachian crocodyliforms, separate and diagnosable from goniopholidids and pholidosaurs, herein referred to as Paluxysuchidae.

The postcranial skeleton of Cerrejonisuchus improcerus (Crocodyliformes: Dyrosauridae) and the unusual anatomy of dyrosaurids

The data reveal the existence of a distinctive postcranial anatomy for Dyrosauridae that is markedly distinct from that of crocodylians, and indicates a more terrestrial lifestyle for Cerrejonisuchus compared to the derived members of the clade.



Longirostrine Crocodylians from the Bartonian of Morocco and Paleogene Climatic and Sea Level Oscillations in the Peri-Tethys Area

ABSTRACT The Eocene–Oligocene transition was a period of high faunal and floral turnover, often correlated with climatic deterioration. Crocodyliforms are climate sensitive, and they have been often


A phylogenetic analysis of the dyrosaurids indicates a close relationship between A. coupatezi and Rhabdognathus and confirms a previous hypothesis that Congosaurus is distinct from Hyposaurus.

A New Sebecid from the Paleogene of Brazil and the Crocodyliform Radiation after the K–Pg Boundary

The basal position of Barinasuchus arveloi, a high-snouted Miocene sebecid, indicates the occurrence of an independent lineage sometime after the K-Pg biotic crisis that developed accentuated oreinirostry, suggesting a more complex history of the post-K-Pg crocodyliform radiation.

The Oldest African Crocodylian: Phylogeny, Paleobiogeography, and Differential Survivorship Of Marine Reptiles Through the Cretaceous-Tertiary Boundary

A phylogenetic analysis has been conducted including 201 characters and 71 taxa, where Ocepesuchus eoafricanus appears as the most basal African gavialoid, and the South American gavIALoids are paraphyletic.

Reptilian assemblages from the latest Cretaceous – Palaeogene phosphates of Morocco: from Arambourg to present time

Arambourg was the first to conduct methodical vertebrate palaeontological studies in the Oulad Abdoun and Ganntour phosphatic basins of Morocco between the 1930s and 1950s. As early as 1935, he

A new species of Dyrosaurus (Crocodylomorpha, Dyrosauridae) from the early Eocene of Morocco: phylogenetic implications

A phylogenetic analysis shows the dyrosaurids as the sister taxon of pholidosaurids, which include Elosuchus, Sarcosuchu, Terminonaris and Pholidosaurus, and the thalattosuchians, and a non-monophyletic group; however, phylogenetic problems remain with respect to longirostrine clade, and more attention should be paid to resolving their evolutionary relationships amongst the crocodyliforms.


  • S. Jouve
  • Environmental Science
    Journal of Paleontology
  • 2007
R. rarus is a nomen dubium, and two new names are erected for the two skulls: R. keiniensis n.

A new occurrence of Dakotasuchus kingi from the Late Cretaceous of Utah, USA, and the diagnostic utility of postcranial characters in Crocodyliformes

It is argued that this individual represents only the second fossil referable to Dakotasuchus kingi, based on overlapping elements, such as the coracoid, dorsal vertebrae, and scutes, which are strikingly similar to their counterparts in the holotype.

A new blunt-snouted dyrosaurid, Anthracosuchus balrogus gen. et sp. nov. (Crocodylomorpha, Mesoeucrocodylia), from the Palaeocene of Colombia

A new exceptionally brevirostrine dyrosaurid is described from the middle Palaeocene Cerrejón Formation, northeastern Colombia, based on four partial skulls and associated postcrania, which indicates a deviation from surface-based predation to sub-surface predation as in modern Gavialis.