Search results
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
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 spe-cies of cetaceans have been described ...
People also ask
When did mammalian evolution start?
How did marine mammals evolve?
Do marine mammals have convergent evolution?
Do marine mammals have evolutionary histories?
May 21, 2018 · How Mammals Conquered the Oceans. THE RISE OF MARINE MAMMALS: 50 MILLION YEARS OF EVOLUTION. By Annalisa Berta, James Sumich (Graphics Editor). Baltimore: Johns Hopkins University Press. 2017. 198 pp., US$75.00 (hardcover). ISBN 9781421423258. Book Review; Published: 21 May 2018; Volume 26, pages 291–292, (2019) Cite this article
- Travis Park
- t.park@nhm.ac.uk
- 2019
May 21, 2018 · Article PDF Available. How Mammals Conquered the Oceans: THE RISE OF MARINE MAMMALS: 50 MILLION YEARS OF EVOLUTION. By Annalisa Berta, James Sumich (Graphics Editor). Baltimore: Johns Hopkins...
- Travis Park
- 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
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 ...
Jan 26, 2015 · The total assembled size of the genome was 2.33 Gb (2.55 Gb with gaps) and covered ∼ 95.3% of the genome. Sequencing and assembly of the manatee varied slightly from the method used for the ...
