A new paper is available online:
Lambert, Olivier; Bianucci, Giovanni; Salas-Gismondi, Rodolfo; Di Celma, Claudio; Steurbaut, Etienne; Urbina, Mario; de Muizon, Christian, 2019. An amphibious whale from the Middle Eocene of Peru reveals early South Pacific dispersal of quadrupedal cetaceans. Current Biology doi:10.1016/j.cub.2019.02.050.
The discovery of Peregocetus in the Pisco Basin of Peru constitutes the first record of a quadrupedal cetacean from the eastern Pacific Ocean, showing that quadrupedal cetaceans inhabited part of the Pacific Ocean. Literally, the basilosaurid Supayacetus and the early mysticete Mystacodon have illuminated early cetacean evolution in the Pacific Ocean, and Peregocetus extends the range of non-pelagicete cetaceans to the eastern Pacific realm, showing that terrestrially suited quadrupedal cetaceans spread quickly throughout the New World during the Eocene.