The anatomy and relationships of Piscobalaena nana (Cetacea, Mysticeti), a Cetotheriidae s. s. from the early Pliocene of Peru Author Bouetel, Virginie Author Muizon, Christian de Département Histoire de la Terre, UMR 5143 (MNHN, CNRS, UPMC), Muséum national d’Histoire naturelle, case postale 38, 57 rue Cuvier, F- 75231 Paris cedex 05 (France) muizon @ mnhn. fr. muizon@mnhn.fr text Geodiversitas 2006 28 2 319 395 journal article 10.5281/zenodo.5376036 1638-9395 5376036 Genus Eschrichtius Gray, 1864 TYPE SPECIES. — Balaenoptera robusta Lilljeborg, 1861 .