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Mystacodon is the oldest known baleen whale, the holotype specimen dating to 36.4 million year ago to the Priabonian of the latest Eocene.The holotype, MUSM 1917, comprises the braincase, teeth, the spinal cord excluding the sacral vertebrae, some fin bones, and the left hip bone.
Coronodon (meaning "crown tooth") is a genus of toothed (transitional) baleen whales from the Early Oligocene Ashley and Chandler Bridge formations of South Carolina. The genus contains three species: the type species C. havensteini, and additional species C. newtonorum and C. planifrons.
Yamatocetus was an early filter feeder, and its teeth, if it had any, were likely vestigial and served no purpose.Since the whale had several double-headed vertebral joints, and modern baleen whales have a reduced number of these to increase the flexibility of the ribcage to aid in deep-sea diving, Yamatocetus likely stayed near the surface.
Baleen whales, as a group, may be sensitive to low-frequency sounds. [ 9 ] Unlike modern baleen whales, Eomysticetus had a blowhole that was positioned ahead of the eyes, and the characteristics of its vertebrae and flipper bones are akin to those of archaeocetes like Basilosaurus .
Engraved on the tooth is a picture of the ship Francis, which artist Fred Myrick served on during the early 1800s. Now, sperm whales are protected under the Marine Mammal Protection Act. So, in ...
Aetiocetus is a genus of extinct basal mysticete, or baleen whale that lived , in the Oligocene in the North Pacific ocean, around Japan, Mexico, and Oregon, U.S. It was first described by Douglas Emlong in 1966 and currently contains known four species, A. cotylalveus, A. polydentatus, A. tomitai, and A. weltoni. [1]
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Before a DNA analysis confirmed the difference in 2002, the whales were considered Gray's beaked whales. Another stranding in Gisborne in 2017 added another specimen to the collection.
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