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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
A review of the broad outlines of what we know about the evolution of marine mammals from their fossil record, and then a focus on three discrete case studies that highlight important ecological transitions and evolutionary transformations that have occurred over the past 50 million years.
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Apr 16, 2015 · April 16, 2015. The oceans are teeming with tetrapods—“four-legged” birds, reptiles, mammals and amphibians—that have repeatedly transitioned from the land to the sea, adapting their legs...
- 1 Archaeoceti
- 2 Mysticeti
- 3 Odontoceti
The story of Cetacea began with the evolutionary radiation of placental mammals after the extinction of the dinosaurs and most large marine reptiles at the end of the Cretaceous about 66 million years ago (hereafter written Mya) (Fig. 2.1). The Paleocene (66–56 Mya) was the first epoch of the Cenozoic, a time when many placental mammals were small ...
Late Eocene Dorudontidae, the likely predecessors of early Mysticeti, had teeth to capture large or intermediate size prey, while modern Mysticeti use baleen to filter large numbers of small prey (see Sect. 8.1.1.1). Hence, there must have been a transitional phase from toothed Dorudontidae that used raptorial biting and intraoral suction to modern...
As with Mysticeti, late Eocene Dorudontidae were likely predecessors of early Odontoceti. However, they retained, to varying degrees, their adult dentition, although not necessarily for feeding. Some species continued to use teeth to capture small and intermediate-sized prey, but others evolved suction feeding and lost the functional use of teeth (...
- Randall W. Davis
- 2019
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
May 21, 2018 · The field of marine mammal palaeontology is currently thriving, with more researchers than ever attempting to address questions about the transition of multiple mammalian lineages (at least seven of them) to aquatic life and their eventual domination of the world’s oceans and rivers.
May 21, 2007 · 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. Evolutionary highlights are presented, focusing on changes affecting the sensory systems, locomotion, breathing, feeding, and reproduction in Cetacea, Sirenia, Desmostylia, and ...