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Diaphorocetus is an extinct genus of odontocete cetacean belonging to Physeteroidea. Its remains were found in the Monte León Formation of Argentina, dating to the Early Miocene.[1]
| Diaphorocetus | |
|---|---|
 | |
| Diaphorocetus poucheti skull | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Artiodactyla |
| Infraorder: | Cetacea |
| Superfamily: | Physeteroidea |
| Family: | incertae sedis |
| Genus: | †Diaphorocetus Ameghino, 1894 |
| Species | |
|
D. poucheti (type) | |
| Synonyms | |
| |
Diaphorocetus was originally named Mesocetus by Moreno (1892).[2] Lydekker (1893) found that Mesocetus was already in use for an extinct mysticete, so he renamed the sperm whale Hypocetus.[3] Ameghino (1894) too recognized Moreno's name as preoccupied, but unaware of Lydekker's paper, coined his own replacement name Diaphorocetus for Mesocetus.[4] Diaphorocetus was declared a nomen protectum (protected name) by Paolucci et al. (2019) because Hypocetus and Paracetus have not been used as valid since 1899 under Article 23.9 of the Code.[5]
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The small teeth of Diaphorocetus and the bottleneck-like nature of the rostrum suggest that Diaphorocetus employed a feeding strategy intermediate between that of raptorial sperm whales like Acrophyseter and Livyatan and extant sperm whales.[5]
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