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American paleontologist O.C. Marsh with assistants.  c. 1872.

Meet a Mount: Peabody Museum Stegosaurus

Taxon: Stegosaurus ungulatus

Specimen Number: PMNH 1853 and PMNH 1858

Year Created: 1910

Stegosaurus was a strange looking animal, but with its long, tottering legs and minuscule head, the Peabody Museum of Natural History Stegosaurus ungulatus mount is stranger still. This mount, constructed by Hugh Gibb and W.S. Benton under the supervision of curator Richard Lull, owes its bizarre proportions to the fact that it is a chimeric combination of at least five differently-sized individuals. 

 O.C. Marsh named Stegosaurus ungulatus in 1877 based on fossils found at Como Bluff, Wyoming, and illustrated it with eight tail spikes. Although modern researchers have since rejected this reconstruction, the mount at Marsh’s home institution still sports the extra-spikey tail. In another way, however, this Stegosaurus mount was ahead of its time. Lull insisted that the tail was held aloft, rather than dragging on the ground, to better function as a defensive weapon.