A small Einiosaurus procurvicornis skull sold for $31,250 at Heritage Auctions' September 28 Natural and Science Signature Auction in Dallas.
 Einiosaurus bones are only found in Montana |
Einiosaurus was a member of the Chasmosaurinae family (which includes Triceratops). The name refers to its forward curving horn, which Heritage describes as "reminiscent of a manual can opener."
It lived in North America (specifically Montana) during the late Cretaceous period, which ended 66m years ago.
An intact woolly mammoth skeleton is set to auction at Summers Place in Sussex, UK in November.
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