A newly described, as-yet-unnamed, species of early baleen whale (genus Morawanocetus) is one of several new species that suggests toothed baleen whales didn’t go extinct as long ago as thought.
http://www.huffingtonpost.com/2013/02/20/baleen-whale-fossils-ancient-species-construction_n_2718350.html?ir=science&utm_campaign=022013&utm_medium=email&utm_source=Alert-science&utm_content=Photo