Full reference: R. W. Boessenecker and J. H. Geisler. 2023. New Skeletons of the Ancient Dolphin Xenorophus sloanii and Xenorophus simplicidens sp. nov. (Mammalia, Cetacea) from the Oligocene of South Carolina and the Ontogeny, Functional Anatomy, Asymmetry, Pathology, and Evolution of the Earliest Odontoceti. Diversity 15(1154):1-164
Parent taxon: Odontoceti according to R. W. Boessenecker and J. H. Geisler 2023
Sister taxa: Acrodelphinidae, Agorophioidea, Agriocetus, Amphidelphis, Argyrocetus, Ashleycetidae, Atropatenocetus, Aureia, Balaenodon, Belosphys, Berardiopsis, Caolodelphis, Cetophis, Champsodelphis, Champsodelphis italicus, Chilcacetus, Colophonodon, Delphinapterus orcinus, Delphinida, Delphinoceti, Delphinodon mento, Delphinopsis, Delphinorhynchus, Delphinus baltringii, Delphinus domeykoi, Delphinus restitutensis, Delphinus taramelli, Delphinus vanzelleri, Dinoziphius, Ediscetus, Enigmatocetus, Eurhinodelphinida, Eurhinodelphinidae, Eurhinodelphis minoensis, Eurhinodelphis sassariensis, Graamocetus, Graphiodon, Helvicetus, Helvicetus rugosus, Hesperocetus, Hesperoinia, Homaeocetus, Homocetus villersii, Hyperoodontoidea, Inticetidae, Ixacanthus, Kharthlidelphis, Lonchodelphis, Macrochirifer, Macrodelphinus, Mesoplodontidae, Microcetus, Miokogia, Miotursiops, Mirocetidae, Monodontoidea, Nannolithax, Neosqualodon, Oedolithax, Oligodelphis, Oligosqualodon, Palaeoziphius, Pandelphinida, Panphyseteroidea, Parapontoporiidae, Parasqualodon, Patriocetidae, Pelodelphis, Phoberodon, Phoca debilis, Phoca rugosidens, Phococetus, Physeteroidea, Physetodon, Platanidelphidi, Platanistida, Platanistoidea, Platydelphis, Pontivaga, Priscodelphinus, Priscodelphinus teres, Priscophyseter, Priscophyseter typus, Proinia, Prolipotes, Prophyseter, Prosqualodon, Prosqualodon hamiltoni, Proterocetus, Rhabdosteoidea, Rhabdosteus, Rhabodosteus, Romaleodelphis, Sachalinocetus, Saurocetus, Saurocetus gibbesii, Scaptodon, Scaptodon lodderi, Squaloceti, Squalodelphis pusillus, Squalodon (Microzeuglodon) wingei, Squalodon crassus, Squalodon imperator, Squalodon linzianus, Squalodon molassicus, Squalodon pelagius, Squalodon vocontiorum, Squalodon wymanii, Squalodontidae, Squalodontoidea, Stereodelphis, Sulakocetus, Synrhina, Tretosphys, Tretosphys uraeus, Uncamentodon, Xenorophidae, Zignodelphinidae, Ziphioidea, Susoidea, Susuoidea
Subtaxa: Simocetidae Stegoceti
Ecology: aquatic carnivore