This weeks #Lego #FossilFriday is #Albertaceratops.
In August 2001, Michael J. Ryan found a skull and postcranial fragments.
In 2007, Ryan formally named and described the fossil Albertaceratops nesmoi. He described it as the most basal centrosaurine.
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In 2010, Ryan et al, thought they had found a bonebed in the Judith River Formation. Further study determined those were a different, but closely related species, Medusaceratops.