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Brygmophyseter, known as the biting sperm whale, is an extinct genus of toothed whale in the sperm whale family with one species, B. shigensis. When it was first described in 1994, the species was placed in the genus Scaldicetus based on tooth morphology , but this was later revised in 1995.
Brygmophyseter skeleton. The macroraptorial sperm whales are a paraphyletic fossil group of hyper-predatory stem sperm whales. All share large, functional, enamel-coated teeth on both the upper and lower jaws, which were used in capturing large prey.
Livyatan is an extinct genus of macroraptorial sperm whale containing one known species: L. melvillei.The genus name was inspired by the biblical sea monster Leviathan, and the species name by Herman Melville, the author of the famous novel Moby-Dick about a white bull sperm whale.
The fossil record suggests that sperm whales were more common in the Miocene, during which basal lineages (such as Zygophyseter and Brygmophyseter) existed; other fossil genera assigned to the Physeteridae include Ferecetotherium, Helvicetus, Idiorophus, Diaphorocetus, Aulophyseter, Orycterocetus, Scaldicetus, and Placoziphius, while kogiid ...
Like Brygmophyseter, it had a relatively small crown, making up only 18% of the tooth. Killer whales ( Orcinus orca ), in comparison, have crowns that make up 20–25% of the tooth. Other characteristics include the presence of the gumline below the crown-root boundary (meaning that part of the root was exposed), and longitudinal grooves on the ...
The dwarf sperm whale (Kogia sima) is a sperm whale that inhabits temperate and tropical oceans worldwide, in particular continental shelves and slopes.It was first described by biologist Richard Owen in 1866, based on illustrations by naturalist Sir Walter Elliot.
Physeter is a genus of toothed whales.There is only one living species in this genus: the sperm whale (Physeter macrocephalus). [2] Some extremely poorly known fossil species have also been assigned to the same genus including Physeter antiquus (5.3–2.6 mya) from the Pliocene of France, [3] and Physeter vetus (2.6 mya – 12 ka) from the Quaternary of the U.S. state of Georgia. [4]
The list of extinct cetaceans features the extinct genera and species of the order Cetacea.The cetaceans (whales, dolphins and porpoises) are descendants of land-living mammals, the even-toed ungulates.