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''Ochotona spanglei'' is an extinct species of pika (mammal in the family Ochotonidae), known from Late Miocene or Early Pliocene fossil from Oregon (USA).〔〔 Fossils were also found in Nebraska referred to as ''Ochotona'' cf. ''spanglei''.〔〔 ''Ochotona spanglei'' is the earliest known pika, which inhabited North America. Pika came at the Miocene-Pliocene boundary from Eurasia. Extinction of ''O. spanglei'' was followed by an approximately three-million-year-long gap in the known North American pikas record.〔 ==Fossil distribution== *McKay Reservoir, Oregon, McKay Formation, Hemphillian (10.3 - 4.9 Ma), ''Ochotona spanglei'', the species was discovered here〔 (described from a lower jaw with complete cheek dentition)〔 *Honey Creek, Nebraska, Hemphillian (10.3 - 4.9 Ma), ''Ochotona'' cf. ''spanglei''〔〔 *Mailbox Prospect, Antelope County, Nebraska, Late/Upper Hemphillian (10.3 - 4.9 Ma), ''Ochotona'' cf. ''spanglei''〔〔 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「Ochotona spanglei」の詳細全文を読む スポンサード リンク
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