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Armbruster's wolf
Armbruster's wolf (''Canis armbrusteri'') is an extinct species of canid which was endemic to North America and lived during the Irvingtonian stage of the Pleistocene epoch 1.8 Mya—300,000 years ago, existing for approximately .〔(PaleoBiology Database: Canis armbrusteri, age range and collections ). Paleodb.org. Retrieved on 2012-12-31.〕
==Origin==
''Canis armbrusteri'' may have evolved from ''C. chihliensis'' in Asia (Tedford, Wang, 182). ''C. armbrusteri'' first appears in the Early Pleistocene (Irvingtonian) in the southwestern United States. Remains are often found within the rock strata containing mammoth. ''C. dirus'', the dire wolf, is thought to have evolved from ''C. armbrusteri'' in North America. ''C. armbrusteri'' was displaced in the middle section of the continent by the dire wolf, with ''C. armbrusteri'' pushed southeastward until the Late Pleistocene (Rancholabrean stage) in Florida.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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