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Thalassoleon : ウィキペディア英語版 | Thalassoleon
''Thalassoleon'' is an extinct genus of large fur seal. ''Thalassoleon'' inhabited the Northern Pacific ocean in latest Miocene and early Pliocene time. Fossils of ''T. mexicanus'' are known from Baja California and southern California. ''T. macnallyae'' is known from central California, and ''T. inouei'' (which may be a synonym of ''T. macnallyae'') is known from Japan. ''Thalassoleon'' could be the ancestor of the modern northern fur seal. ''T. mexicanus'' was comparable in size to the largest fur seals, with an estimated weight of 295-318 kg (650-700 lb).〔Geological Survey professional paper, Volume 992 By Geological Survey (U.S.)〕 ''T. macnallyae'', based on size of the mandible, may have grown much larger, similar in size to a walrus. ==References==
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