Full reference: E. D. Mitchell. 1989. A new cetacean from the late Eocene La Meseta Formation, Seymour Island, Antarctic Peninsula. Canadian Journal of Fisheries and Aquatic Sciences 46(12):2219-2235
Parent taxon: Cetacea according to D. W. Rice 2009
See also Fordyce and de Muizon 2001, Gingerich 2005, Mitchell 1989 and Rice 1998
Sister taxa: Ambulocetidae, Anarnak, Anodontocete, Archaeoceti, Archaeocetus, Argyrocetidae, Balaenodea, Balaenodontae, Balaenoidorum, Berardiopsis miocaenus, Berardiopsis pliocaenus, Canis primigenius, Cetotheriomorphus dubius, Cetotherium priscum, Cetotolites, Globicephalus eocaenus, Halicore maximovitschii, Kalakocetidae, Loncodelphis, Manatus giganteus, Mystacoceta, Nanisocetus, Neoballaenidae, Odontocetoidea, Otaria leclercii, Oxypterus, Pakicetidae, Palaeocetus, Pelagiceti, Procetus, Proteroceta, Protocetidae, Remingtonocetidae, Remingtonocetoidea, Rhynchoceti, Squalodon hypsispondylus, Tretosphrys, Zeugloceta, Ziphius (Dolichodon) geelongensis, Balanadae
Subtaxa: none
Ecology: aquatic carnivore
Distribution: there are no occurrences of Protocetoidea in the database