This video says about itself:

36.4M-Year-Old Fossilized Skeleton May Be Oldest Baleen Whale Relative

12 May 2017

Whale fossil found in Peru is the oldest-known baleen whale relative ever discovered, according to research published May 11 in Current Biology.

From the University of Otago in New Zealand:

New genus and species of extinct baleen whale identified

April 18, 2018

University of Otago palaeontologists are rewriting the history of New Zealand’s ancient whales by describing a previously unknown genus of baleen whale, alive more than 27.5 million years ago and found in the Hakataramea Valley.

The new genus and species of extinct baleen whale is based on a skull and associated bones unearthed from the Kokoamu Greensand, a noted fossil-bearing rock unit in the South Canterbury and Waitaki district from the Oligocene period, which extends from about 33.9 million to 23 million years ago. At this time, New…