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Cetotherium
''Cetotherium'' ("whale beast") is a genus of cetaceans from the family Cetotheriidae. ==Taxonomy== The family Cetotheriidae and the genus ''Cetotherium'' (sensu lato) have been used as wastebaskets for all kinds of baleen whales, most notably by , Spassky (1954) and . Based on more recent phylogenetic studies and revisions of many 19th century genera, much smaller monophyletic Cetotheriidae and ''Cetotherium'' sensu stricto is limited to a single or only a few species. For example, included only ''C. rathkii'' and ''C. riabinini'' in the genus and only ten genera in the family. Cetotheriidae were thought to have gone extinct during the Pliocene until 2012, when it was hypothesized that the Pygmy right whale was the sole surviving species of this family.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Cetotherium」の詳細全文を読む
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