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Form, Function, and Anatomy of Dorudon Atrox (Mammalia, Cetacea): An Archaeocete from the Middle to Late Eocene of Egypt
Dorudon atrox is a medium-sized archaeocete cetacean, around five meters in length from snout to tail in life, and is known from the Birket Qarun and Gehannam Formations of Fayum, Egypt. These
Origin and evolution of large brains in toothed whales.
It is shown that brain size increased significantly in two critical phases in the evolution of odontocetes, and was accompanied by a decrease in body size in Delphinoidea only by 15 million years ago.
Cetaceans Have Complex Brains for Complex Cognition
A group of eminent cetacean researchers respond to headlines charging that dolphins might be "flippin' idiots" by concluding that the large brain of cets evolved to support complex cognitive abilities.
The Evolution of Maximum Body Size of Terrestrial Mammals
Analysis suggests that although the primary driver for the evolution of giant mammals was diversification to fill ecological niches, environmental temperature and land area may have ultimately constrained the maximum size achieved.
Phylogenetic Relationships of Extinct Cetartiodactyls: Results of Simultaneous Analyses of Molecular, Morphological, and Stratigraphic Data
Both analyses supported the exclusion of Mesonychia from Cetartiodactyla and a close phylogenetic relationship between Hippopotamidae and Cetacea, and added stratigraphic information to the intrinsic dataset, which found fewer most parsimonious trees.
New Protocetid Whales from Alabama and Mississippi, and a New Cetacean Clade, Pelagiceti
Georgiacetus vogtlensis was originally described from a skull and relatively complete skeleton collected from the “Blue Bluff unit” of early Bartonian age from Georgia (Hulbert et al., 1998). This
Climate, Critters, and Cetaceans: Cenozoic Drivers of the Evolution of Modern Whales
Based on a comprehensive diversity data set, much of observed cetacean paleodiversity can indeed be explained by diatom diversity in conjunction with variations in climate as indicated by oxygen stable isotope records (δ18O).
A new xenorophus‐like odontocete cetacean from the oligocene of North Carolina and a discussion of the basal odontocete radiation
Synopsis Oligocene cetaceans in eastern North America are currently only reported from the area around Charleston, South Carolina, despite the relative abundance of Oligocene nearshore marine rocks
Evolution of marine mammals: Back to the sea after 300 million years
  • M. Uhen
  • Biology, Medicine
    Anatomical record
  • 1 June 2007
The earliest representatives of these clades all show morphological features that indicate they were feeding while in the water, suggesting that feeding ecology is a key factor in the evolution of marine mammals.