Lambert, O. 2008 Sperm whales from the Miocene of the North Sea: a re-appraisal Bulletin de l'Institut royal des Sciences naturelles de Belgique, Sciences de la Terre 78 277-316 Zygorhiza Agorophius Eudelphis Zygophyseter Brygmophyseter Diaphorocetus Placoziphius Orycterocetus Physeterula Aulophyseter Physeter IRSNB_M_dot_1937 Thalassocetus Scaphokogia Praekogia Kogia Osteology Maximum Parsimony Based on reanalysis of the original matrix. Lambert_2008b