The Ancestry of Whales

@article{Rose2001TheAO,
  title={The Ancestry of Whales},
  author={Kenneth D. Rose},
  journal={Science},
  year={2001},
  volume={293},
  pages={2216 - 2217}
}
  • K. Rose
  • Published 21 September 2001
  • Environmental Science
  • Science
Whales are mammals that moved to the sea some 50 million years ago. The question of who their ancestors were has vexed scientists for years. In his Perspective, [Rose][1] highlights the report by [ Gingerich et al .][2], who report unusually well-preserved primitive whale fossils. Rose explains that these fossils reconcile morphological and molecular data for the first time, indicating that whales evolved from even-toed ungulates (hoofed animals) rather than mesonychians (an extinct group of… 
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References

SHOWING 1-8 OF 8 REFERENCES
The position of Cetacea within mammalia: phylogenetic analysis of morphological data from extinct and extant taxa.
Knowledge of the phylogenetic position of the order Cetacea (whales, dolphins, and porpoises) within Mammalia is of central importance to evolutionary biologists studying the transformations of
Ankle morphology of the earliest Cetaceans and its implications for the phylogenetic relations among ungulates.
TLDR
Tarsal data do not support Cete (Mesonychia plus Cetacea) and are consistent with the exclusion of perissodactyls from paenungulates as suggested by some molecular studies.
Comparative osteology of North American dichobunid artiodactyls.
TLDR
The postcranial skeletal anatomy of the early Eocene dichobunid Diacodexis, the oldest known artiodactyl, is described, together with new material of Bunophorus, Antiacodon, Pentacemylus, and an undetermined homacodontine, indicating that they were uniformly highly adapted for cursorial-saltatorial locomotion.
Postcranial Osteology of the most Primitive Artiodactyl: Diacodexis pakistanensis (Dichobunidae)
TLDR
Diacodexis pakistanensis is the smallest and most primitive artiodactyl and has five complete digits in the manus and four in the pes and is digitigrade.
Classification of mammals : above the species level
TLDR
Malcolm C. McKenna and Susan K. McKenna inherited the project from Simpson and, with Bell, has constructed a completely updated hierarchical system that reflects the genealogy of Mammalia.
Origin of Whales from Early Artiodactyls: Hands and Feet of Eocene Protocetidae from Pakistan
TLDR
Partial skeletons of two new fossil whales, Artiocetus clavis and Rodhocetus balochistanensis, are among the oldest known protocetid archaeocetes, and are important in augmenting the diversity of early Protocetidae and clarifying that Cetacea evolved from early Artiodactyla rather than Mesonychia.
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.