The Origin and Evolutionary Biology of Pinnipeds: Seals, Sea Lions, and Walruses

@article{Berta2018TheOA,
  title={The Origin and Evolutionary Biology of Pinnipeds: Seals, Sea Lions, and Walruses},
  author={Annalisa Berta and Morgan Churchill and Robert W. Boessenecker},
  journal={Annual Review of Earth and Planetary Sciences},
  year={2018}
}
The oldest definitive pinniped fossils date from approximately 30.6–23 million years ago (Ma) in the North Pacific. Pinniped monophyly is consistently supported; the group shares a common ancestry with arctoid carnivorans, either ursids or musteloids. Crown pinnipeds comprise the Otariidae (fur seals and sea lions), Odobenidae (walruses), and Phocidae (seals), with paraphyletic “enaliarctines” falling outside the crown group. The position of extinct Desmatophocidae is debated; they are… 
A new Miocene pinniped Allodesmus (Mammalia: Carnivora) from Hokkaido, northern Japan
A nearly complete pinniped skeleton from the middle Miocene Okoppezawa Formation (ca 16.3–13.9 Ma), Hokkaido, northern Japan, is described as the holotype of Allodesmus uraiporensis sp. nov. The new
Current status of pinnipeds phylogeny based on molecular and morphological data
ABSTRACT The disagreement surrounding the relationship within pinnipeds as well as their phylogenetic affinities still remains unresolved. Molecular-based studies neglect significant morphological
The Dawn of Desmatophocidae: A New Species of Basal Desmatophocid Seal (Mammalia, Carnivora) from the Miocene of Oregon, U.S.A.
TLDR
The identification of another desmatophocid species at the already pinniped-rich Iron Mountain Bed suggests that the approximately synchronous mid-Miocene Climatic Optimum played a role in this increase in pinnipesimorph species diversity.
Colonization of the ancient southern oceans by small-sized Phocidae: new evidence from Australia
TLDR
The description of this assemblage is consistent with the Neogene pinniped fauna of Australia being exclusively monachine before the arrival of otariids (fur seals and sea lions), and suggests that small archaic phocids potentially used the Southern Ocean as a means of dispersal before the arrived of extant Antarctic monachines.
The oldest record of the Steller sea lion Eumetopias jubatus (Schreber, 1776) from the early Pleistocene of the North Pacific
TLDR
Because GKZ-N 00001 is the earliest fossil having been identified as a species of the sea lion genus Eumetopias, it is of importance to elucidate the evolutionary history of that genus.
What do we know about the fossil record of pinnipeds? A historiographical investigation
TLDR
While the pinniped fossil record may have adequate temporal and taxonomic coverage, it has a strong geographical bias and its comparability is hindered by the incompleteness of type specimens, which should be taken into account when addressing patterns of their past diversity, evolutionary history and paleoecology.
Phylogenomic Discordance in the Eared Seals is best explained by Incomplete Lineage Sorting following Explosive Radiation in the Southern Hemisphere
TLDR
High-coverage genome-wide sequencing is used for 14 of the 15 species of Otariidae to elucidate the phylogeny of the family and its bearing on the taxonomy and biogeographical history and finds a fully supported species tree that agrees with the few well-accepted relationships and establishes monophyly of the genus Arctocephalus.
Phylogenomic Discordance in the Eared Seals is best explained by Incomplete Lineage Sorting following Explosive Radiation in the Southern Hemisphere.
TLDR
High-coverage genome-wide sequencing is used for 14 of the 15 species of Otariidae to elucidate the phylogeny of the family and its bearing on the taxonomy and biogeographical history and finds a fully supported species tree that agrees with the few well-accepted relationships and establishes monophyly of the genus Arctocephalus.
A new large-bodied Pliocene seal with unusual cutting teeth
TLDR
An ancestral state estimation of body length indicates that monachines did not have a remarkable size increase until the evolution of the lobodontins and miroungins, and a parsimony phylogenetic analysis found S. magnus is a crown monachine.
...
1
2
3
4
5
...