Form, Function, and Anatomy of Dorudon Atrox (Mammalia, Cetacea): An Archaeocete from the Middle to Late Eocene of Egypt
- M. Uhen
- 30 January 2004
Reconstructions of the soft anatomy of Dorudon atrox, along with analyses of functional morphology show that D. atrox was a caudally propelled swimmer, much like modem cetaceans.
Origin and evolution of large brains in toothed whales.
- L. Marino, D. McShea, M. Uhen
- Biology, Environmental ScienceAnatomical Record Part A-discoveries in Molecular…
- 1 December 2004
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.
Small mammals, xenarthrans, and marine mammals
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.
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 Pliocene marine megafauna extinction and its impact on functional diversity
- C. Pimiento, J. Griffin, C. Jaramillo
- Environmental Science, GeographyNature Ecology & Evolution
- 26 June 2017
A previously unrecognized extinction event among marine megafauna during this time is identified, with extinction rates three times higher than in the rest of the Cenozoic, and with 36% of Pliocene genera failing to survive into the Pleistocene.
Phylogeny and Taxonomy
A JOINT meeting of the Linnean Society and the Association for the Study of Systematics in relation to General Biology was held, at which a discussion took place on phylogeny and taxonomy.
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 material of Natchitochia jonesi and a comparison of the innominata and locomotor capabilities of Protocetidae
- M. Uhen
- 1 July 2014
Comparison of archaeocete innominata and sacra in a phylogenetic context indicates that the apomorphic sacrum composed of 4 vertebrae was reduced to 3 (Qaisracetus) to 2 (Protocetus?, Natchitochia) to 0 (Georgiacetus, Basilosauridae), while the innominate remained robust, supporting a large hind limb until the origin of the Basilosaurusidae.
The Origin(s) of Whales
- M. Uhen
- Geography, Environmental Science
- 30 April 2010
This work states that modern whales originated from ancient whales at or near the Eocene/Oligocene boundary, approximately 33.7 Mya, and that whale diversity peaked in the late middle Miocene and fell thereafter toward the Recent, yielding the authors' depauperate modern whale.