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出典:Wikipedia
出典:『Wikipedia』 (2011/01/30 03:54 UTC 版)
Alainaspis platyrhina is a species of jawless fish which existed in what is now the Northwest Territories of Canada, during the upper Silurian period. It was first named by David Elliott and David Dineley in 1985, and is placed in the monotypic genus Alainaspis, closely related to Boothiaspis.
Alainaspis