Morenocetus parvus (Cabrera 1926, Buono et al 2017, Miocene, Patagonia) is a small, primitive right whale known from an arched cranium.

Miocaperea is the extant pygmy right whale.

Eubalaena australis (Desmoulins 1822; 15-18 m in length; extant) is the Southern right whale. Derived from a sister to Caperea and Desmostylus, the giant mouth is much deeper than in Balaeonoptera, with longer baleen. The skull is relatively larger and the postcrania shorter and deeper with relatively larger fins. Five digits are present on the manus. The mandible moves relatively little. The lower lip rises to meet the upper jaw. The cervical series is tightly interwoven.