# Eophyseter

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Extinct genus of sperm whale from the Pliocene epoch

Eophyseter Temporal range: 3.2-3.0 Ma (Piacenzian) PreꞒ Ꞓ O S D C P T J K Pg N [1] Scientific classification Kingdom: Animalia Phylum: Chordata Class: Mammalia Infraclass: Placentalia Order: Artiodactyla Infraorder: Cetacea Family: Physeteridae Genus: †Eophyseter Bisconti et al., 2025 Type species †Eophyseter damarcoi Bisconti et al., 2025

***Eophyseter*** is a [genus](/source/Genus) of extinct [physeterid](/source/Physeteroidea) sperm whale from the [Pliocene](/source/Pliocene) [epoch](/source/Epoch) of [Italy](/source/Italy). It contains one known species: ***Eophyseter damarcoi***, the remains of which were found in the [Sabbie d'Asti Formation](https://en.wikipedia.org/w/index.php?title=Sabbie_d%27Asti_Formation&action=edit&redlink=1) in the municipality of [Vigliano d'Asti](/source/Vigliano_d'Asti). The holotype specimen, MGPT-PU 13864, is relatively complete, consisting of a partial skeleton including most of the vertebral column, a partial left flipper and sternum, fifteen ribs and one chevron. The generic name derives from the [Ancient Greek](/source/Ancient_Greek) words for dawn (ήώς) and blower (φυσώ). The specific name honors [Piero Damarco](https://en.wikipedia.org/w/index.php?title=Piero_Damarco&action=edit&redlink=1), who facilitated the preparation of the holotype specimen.[1]

Phylogenetic analysis by Michelangelo Bisconti and colleagues recovers *Eophyseter* within the family [Physeteridae](/source/Physeteroidea), placing it as sister to *[Idiophyseter](/source/Idiophyseter)* and as a close relative to *[Aulophyseter](/source/Aulophyseter)* and the [modern sperm whale](/source/Sperm_whale) (*Physeter macrocephalus*). Using four equations derived from measurements taken from extant sperm whales, Bisconti and colleagues estimated the mean skeletal length of *Eophyseter* at 12.83 m (42.1 ft), and its total body length to have been 15.1 m (50 ft) in life.[1]

## References

1. ^ [***a***](#cite_ref-Description_1-0) [***b***](#cite_ref-Description_1-1) [***c***](#cite_ref-Description_1-2) Bisconti, M.; Daniello, R.; Stecca, R.; Carnevale, G. (2025). ["A new Pliocene sperm whale from Vigliano D'Asti, Piedmont, Northwest Italy"](https://riviste.unimi.it/index.php/RIPS/article/download/22338/23689). *Rivista Italiana di Paleontologia e Stratigrafia*. **131** (1): 139–175. [Bibcode](/source/Bibcode_(identifier)):[2025RIPS..13122338B](https://ui.adsabs.harvard.edu/abs/2025RIPS..13122338B). [doi](/source/Doi_(identifier)):[10.54103/2039-4942/22338](https://doi.org/10.54103%2F2039-4942%2F22338).

v t e Odontocete genera Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Artiodactyla Infraorder: Cetacea Odontoceti Odontoceti †Agorophius †Amphidelphis †Ankylorhiza †Archaeodelphis †Argyrocetus †Ashleycetus †Caolodelphis †Chilcacetus †Enigmatocetus †Eoplatanista †Inticetus †Macrodelphinus †Microcetus †Mirocetus †Neosqualodon †Olympicetus †Papahu †Patriocetus †Phoberodon †Phococetus †Prosqualodon †Romaleodelphis †Sachalinocetus †Simocetus †Sulakocetus †Tangaroasaurus †Xenorophidae Albertocetus Cotylocara Echovenator Inermorostrum Xenorophus †Waipatiidae Awamokoa Ediscetus Nihohae Nihoroa Otekaikea Urkudelphis Waipatia †Squalodontidae Eosqualodon Squalodon †Squaloziphiidae Crisocetus? Squaloziphius Yaquinacetus †Eurhinodelphinidae Ceterhinops Eurhinodelphis Iniopsis Mycteriacetus Phocaenopsis Schizodelphis Vanbreenia Xiphiacetus Ziphiodelphis Crown-Odontoceti see below↓ Crown-Odontoceti Physeteroidea †Acrophyseter †Albicetus †Angelocetus †Brygmophyseter †Eudelphis †Hoplocetus †Livyatan †Miophyseter †Rhaphicetus †Scaldicetus †Zygophyseter Kogiidae †Aprixokogia Kogia †Koristocetus †Nanokogia †Platyscaphokogia †Pliokogia †Praekogia †Scaphokogia †Thalassocetus? Physeteridae †Aulophyseter †Cozzuoliphyseter †Diaphorocetus †Eophyseter †Idiophyseter †Idiorophus †Orycterocetus Physeter †Physeterula †Placoziphius †Thalassocetus? Platanistoidea †Aondelphis †Aureia †Dolgopolis †Ensidelphis †Perditicetus †Eurhinodelphinidae? †Squalodontidae? †Waipatiidae? †Allodelphinidae? Allodelphis Arktocara Goedertius Ninjadelphis Zarhinocetus †Squalodelphinidae? Fordycetus Furcacetus Huaridelphis Macrosqualodelphis Medocinia Miodelphinus Notocetus Phocageneus Squalodelphis Platanistidae †Araeodelphis †Dilophodelphis †Grimadelphis †Pachyacanthus? †Pebanista Platanista †Pomatodelphis †Prepomatodelphis †Zarhachis? Ziphiidae †Aporotus †Beneziphius †Caviziphius †Chavinziphius †Chimuziphius †Choneziphius †Dagonodum †Flandriacetus †Globicetus †Imocetus †Khoikhoicetus †Mamaziphius †Messapicetus †Nazcacetus †Nenga †Ninoziphius †Notoziphius †Pterocetus Tasmacetus †Tusciziphius †Xhosacetus †Ziphirostrum Berardiinae †Archaeoziphius Berardius †Microberardius Ziphiinae †Izikoziphius Ziphius Hyperoodontinae †Africanacetus Hyperoodon †Ihlengesi Indopacetus Mesoplodon Delphinida see below↓ Delphinida Delphinida †Albireo †Atocetus †Brevirostrodelphis †Cammackacetus †Delphinodon †Hadrodelphis †Herbeinodelphis †Liolithax †Lophocetus †Macrokentriodon †Miminiacetus †Odobenocetops †Pictodelphis †Pithanodelphis †Tagicetus †Westmorelandelphis †Kentriodontidae Belonodelphis? Kampholophos Kentriodon Mesokentriodon Platysvercus Sophianacetus Rudicetus Wimahl Lipotidae Eolipotes Lipotes †Parapontoporia †Prolipotes Inioidea †Awadelphis Iniidae †Brujadelphis †Goniodelphis Inia †Ischyrorhynchus †Isoninia? †Isthminia †Kwanzacetus †Meherrinia †Plicodontinia †Saurocetes Pontoporiidae †Atocetus? †Auroracetus †Brachydelphis †Piscorhynchus †Pliopontos †Pontistes †Protophocaena †Samaydelphis †Scaldiporia †Stenasodelphis Pontoporia Delphinoidea Monodontidae †Bohaskaia †Casatia Delphinapterus †Denebola †Haborodelphis Monodon Phocoenidae †Archaeophocaena †Australithax †Brabocetus †Haborophocoena †Lomacetus †Miophocaena Neophocaena †Numataphocoena Phocoena Phocoenoides †Piscolithax †Pterophocaena? †Semirostrum †Septemtriocetus Delphinidae †Arimidelphis †Australodelphis †Eodelphinus †Etruridelphis †Hemisyntrachelus Lagenorhynchus Leucopleurus †Norisdelphis Orcinus †Platalearostrum †Pliodelphis †Pterophocaena? †Septidelphis Lissodelphininae Aethalodelphis Cephalorhynchus Lissodelphis Delphininae Delphinus Lagenodelphis Sotalia Sousa Stenella Tursiops Globicephalinae Feresa Globicephala Grampus Orcaella Peponocephala Pseudorca †Rododelphis Steno

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Adapted from the Wikipedia article [Eophyseter](https://en.wikipedia.org/wiki/Eophyseter) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Eophyseter?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.