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A really old and small sperm whale

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Diagrama de Ferecetotherium kellogi, el cachalote más antiguo que se conoce, procedente del Oligoceno tardío de Azerbaiyán (23 mda), probablemente se alimentó de peces en vez de calamares. Silueta especulativa inferida en base a parientes fósiles 
Referencias: 
-G. A. Mchedlidze. 1976. Osnovnye Cherty Paleobiologischeskoi Istorii Kitoobraznykh [M. Uhen/M. Uhen/M. Uhen]
-O. Lambert. 2008. Sperm whales from the Miocene of the North Sea: a re-appraisal. Bulletin del'Institut Royal des Sciences Naturelles de Belgique, Sciences de la Terre 78:277-316 [M. Uhen/M. Uhen/M. Uhen]

Diagram of Ferecetotherium kellogi, the oldest known sperm whale, its remains were found in Azerbaijan dating back to the late Oligocene (23mya), probably fed on fish rather squid like modern Sperm Whale. Speculative silhouette inferred based on other fossil relatives.
References: 
- G. A. Mchedlidze. 1976. Osnovnye Cherty Paleobiologischeskoi Istorii Kitoobraznykh [M. Uhen/M. Uhen/M. Uhen]
-O. Lambert. 2008. Sperm whales from the Miocene of the North Sea: a re-appraisal. Bulletin del'Institut Royal des Sciences Naturelles de Belgique, Sciences de la Terre 78:277-316 [M. Uhen/M. Uhen/M. Uhen].
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Comments10
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vasix's avatar
The more I look at your artwork, the more I wonder if the Zygophyseter-grade forehead is an ancestral condition for physeteroids in general...