The millions of years that led to the modern-day assemblage of whale, dolphin, and porpoise species encapsulates a truly incredible period of mammalian evolution. In this video, we will be reviewing what is currently known about the evolutionary history of Cetacea, as well as examining the relationships this clade has to other, closely related mammals.
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Sources:
https://www.montclair.edu/profilepages/media/5008/user/Gatesy_et_al._2012_A_phylogenetic_blueprint_for_a_modern_whale.pdf
http://www.ivpp.cas.cn/cbw/gjzdwxb/xbwzxz/201504/P020150420393427001650.pdf
https://www.annualreviews.org/doi/10.1146/annurev.ecolsys.33.020602.095426
https://en.wikipedia.org/wiki/Evolution_of_cetaceans
The Walking Whales - J.G.M Thewissen, 2014
The Evolution of Artiodactyls - Donald R. Prothero, Scott E. Foss (editors), 2007
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https://wayback.archive-it.org/all/20120714043759/http://www.neomed.edu/DEPTS/ANAT/Thewissen/pdf/HT2.pdf
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC34678/
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Gingerich PD, ul-Haq M, von Koenigswald W, Sanders WJ, Smith BH, Zalmout IS (2009) New Protocetid Whale from the Middle Eocene of Pakistan: Birth on Land, Precocial Development, and Sexual Dimorphism. PLoS ONE 4(2): e4366. https://doi.org/10.1371/journal.pone.0004366