 "Agalephus gobbosus", "Balaenoptera robustus", "Agalephus gibbosus").Things got even worse in the 1930s when it was finally realised that the extinct Atlantic population was the same species as the extant Pacific population, and the new combination "Eschrichtius gibbosus" was proposed.In his morphological analysis, found that eschrichtiids and Cetotheriidae ("Cetotherium", "Mixocetus" and "Metopocetus") form a monophyletic sister group of Balaenopteridae.