The Early Radiations of Cetacea (Mammalia): Evolutionary Pattern and Developmental Correlations

@article{Thewissen2002TheER,
  title={The Early Radiations of Cetacea (Mammalia): Evolutionary Pattern and Developmental Correlations},
  author={J. G. M. Thewissen and E. Mair Williams},
  journal={Annual Review of Ecology, Evolution, and Systematics},
  year={2002},
  volume={33},
  pages={73-90}
}
▪ Abstract The origin and early evolution of Cetacea (whales, dolphins, and porpoises) is one of the best examples of macroevolution as documented by fossils. Early whales are divided into six families that differ greatly in their habitats, which varied from land to freshwater, coastal waters, and fully marine. Early cetaceans lived in the Eocene (55–37 million years ago), and they show an enormous morphological diversity. Toward the end of the Eocene the modern cetacean body plan originated… 
The origin and early evolution of whales: macroevolution documented on the Indian Subcontinent
TLDR
The first steps of whale evolution are reviewed, i.e. the transition from a land mammal to obligate marine predators, documented by the Eocene cetacean families of the Indian subcontinent: Pakicetaceae, Ambulocetidae, Remingtonocet Families, Protocet families, and Basilosauridae, as well as their artiodactyl sister group, the Raoellidae.
Cetaceans as Exemplars of Evolution and Evolutionary Ecology: A Glossary
TLDR
This review, arrayed in alphabetical glossary format, aims to show the breadth and depth of cetacean research studies supporting and investigating numerous evolutionary themes.
Return to the Sea: The Evolution of Marine Mammals
  • R. Davis
  • Geography, Environmental Science
    Marine Mammals
  • 2019
TLDR
Morphological and molecular evidence support a monophyletic origin for the three extant families of pinnipeds (Otariidae, Odobenidae, and Phocidae) within the taxonomic order Carnivora.
Eocene evolution of whale hearing
TLDR
The origin of whales (order Cetacea) is one of the best-documented examples of macroevolutionary change in vertebrates, and the fossil record indicates that this evolutionary transition took less than 15 million years.
From Land to Water: the Origin of Whales, Dolphins, and Porpoises
TLDR
This work focuses on the evolution of cetacean organ systems, as these document the transition from land to water in detail.
Embryogenesis and Development in Stenella attenuata and Other Cetaceans
The prenatal development of most species of cetaceans is poorly known because descriptions were based on fortuitous recoveries of one or a few embryos of one species, and it was impossible to acquire
The Ecological Rise of Whales Chronicled by the Fossil Record
  • N. Pyenson
  • Environmental Science, Geography
    Current Biology
  • 2017
Diverse stem cetaceans and their phylogenetic relationships with mesonychids and artiodactyls
TLDR
Detailed review and more extensive phylogenetic analyses on anthracotheriids and entelodontids will aid the clarification of uncertainties related to the hippopotamus-cetacean phylogenetic hypothesis.
...
...

References

SHOWING 1-10 OF 66 REFERENCES
The time of origin of whales and the role of behavioral changes in the terrestrial-aquatic transition
TLDR
Primitive features of Nalacetus, the large number of synapomorphies diagnosing Cetacea, and the implied ghost lineage suggest that the early cetacean radiation was much more extensive than has been previously recognized.
Synopsis of the Earliest Cetaceans
The story of cetacean origin, early evolution, diversification, and dispersal has dramatically changed in the last 20 years, related in large part to discoveries made in Pakistan, India, and the
Skeletons of terrestrial cetaceans and the relationship of whales to artiodactyls
TLDR
Cladistic analysis of the skeletons of two early Eocene pakicetid cetaceans, the fox-sized Ichthyolestes pinfoldi, and the wolf-sized Pakicetus attocki, indicates that cetACEans are more closely related to artiodactyls than to any mesonychian, and supports monophyly of artiodACTyls.
The emergence of whales : evolutionary patterns in the origin of Cetacea
TLDR
Synopsis of the Earliest Cetaceans: Pakicetidae, Ambulocet Families, Remingtonocet families, and Protocetidae; and implications of Vertebral Morphology for Locomoter Evolution in Early Cetacea.
New whale from the Eocene of Pakistan and the origin of cetacean swimming
TLDR
This is the oldest fossil whale described from deep-neritic shelf deposits, and it shows that tail swimming evolved early in the history of cetaceans.
Implications of Vertebral Morphology for Locomotor Evolution in Early Cetacea
TLDR
Although almost invariably fragmentary, early cetacean postcranial skeletons are surprisingly informative, and can complement morphological indicators of diet, sensory specializations, and skull reorganization to fill in some of the gaps in the authors' understanding of the dramatic transition of earlyCetaceans as they moved from land to water.
Locomotor evolution in the earliest cetaceans: functional model, modern analogues, and paleontological evidence
TLDR
It is concluded that Ambulocetus may have locomoted by a combination of pelvic paddling and dorsoventral undulations of the tail, and that its locomotor mode in water resembled that of the modern otter Lutra most closely.
The History of Whales-Their Adaptation to Life in the Water
  • R. Kellogg
  • Environmental Science
    The Quarterly Review of Biology
  • 1928
TLDR
It is possible that the forebears of the whales may have found either a safe refuge from more active predatory types, or an abundance of food in shallow water and along the shores, and available data indicate that the late Sir William Flower was not far wrong when he suggested that the ancestors of whales frequented fresh water and that search for their remains should be made in the fresh water deposits of the Cretaceous period.
Whale Origins as a Poster Child for Macroevolution
TLDR
Although Darwin didn’t have the details right—bears did not evolve into whales—his basic point was correct: The authors can now show that whales are in fact hoofed mammals that took to sea.
Trophic model for the adaptive radiations and extinctions of pelagic marine mammals
TLDR
It is suggested that increased upwelling intensity, due to climatic or tectonic events, permitted the initial invasions and radiations and that decreased intensity caused cetacean extinctions in the Oligocene.
...
...