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- Most agree that Physeteridae (sperm whales) and Ziphiidae (beaked whales) are among the earliest of living groups to branch off within the odontocete clade after the split of Odontoceti and Mysticeti, which appears to have occurred at or perhaps just before the Eocene/Oligocene boundary (Fordyce, 2002).
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How did marine mammals evolve?
Do marine mammals have convergent evolution?
When did mammalian evolution start?
When did marine mammals go back to the sea?
May 21, 2007 · Marine Mammal Diversity. Living groups of marine mammals vary greatly in their diversity. Rice (1998; Table 1 therein) reports that living Cetacea include 83 species in 39 genera; living Pinnipedia include 36 species in 21 genera; and Recent Sirenia include 5 species in 3 genera. Since then, several new species of cetaceans have been described ...
- Mark D. Uhen
- 2007
Oct 18, 2012 · University of California Press, Berkeley, CA. 2012. 205 pp., $49.95 (cloth), $25.62 (Kindle). ISBN 9780520270572. Annalisa Berta leads readers through a vast range of topics regarding the evolution of marine mammals in Return to the Sea: The Life and Evolutionary Times of Marine Mammals. In this volume geared towards non-specialists (one might ...
- Mark D. Uhen
- muhen@gmu.edu
- 2013
Jan 26, 2015 · To investigate convergent evolution at the genomic level, we sequenced and performed de novo assembly of the genomes of three species of marine mammals (the killer whale, walrus and manatee)...
- Andrew D Foote, Andrew D Foote, Yue Liu, Gregg W C Thomas, Tomáš Vinař, Jessica Alföldi, Jixin Deng,...
- 2015
A rigorous test for the evolution of marine mammals would use many more species and more characters. But the general result holds: mammals made the transition to water at least three times: in pinnipeds (seals and walruses), in whales, and also in sirenians (dugongs and manatees).
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May 21, 2007 · The fossil record demonstrates that mammals re-entered the marine realm on at least seven separate occasions. Five of these clades are still extant, whereas two are extinct. This review presents a brief introduction to the phylogeny of each group of marine mammals, based on the latest studies using both morphological and molecular data.
- Mark D. Uhen
- 2007
Nov 15, 2019 · Convergent morphological adaptations for an aquatic life (e.g., fusiform body shape, flukes and flippers) evolved separately in the three taxonomic orders of extant marine mammals (Artiodactyla [infraorder Cetacea], Carnivora [clade Pinnipedia and sea otters], and Sirenia).
Nov 9, 2015 · Of the 907 rapidly evolving genes in marine mammals, only 13 genes (1.4%) had a nonsynonymous to synonymous substitution (d N /d S) ratio greater than one, indicating that the elevated ...
