[D] Ornithotarsus immanis [jG]
Cretaceous Late Campanian
Ornithischia Ornithopoda Hadrosauridae Hadrosaurinae Gryposaurini
New Jersey, US
Hadrosaurus foulkii (Leidy, 1858) > Ornithotarsus immanis (Cope, 1869)
(3 specimens of foot bones) Synonymized with Hadrosaurus foulkii, based on a partial hindlimb. In the \\\'Proceedings of the Boston Natural History Society\\\' of June 18th, 1869, Prof. Cope stated an account of the discovery by Dr. Samuel Lockwood, of Keyport, of a fragment of a large Dinosaur, in the clay which immediately underlies the claymarls below the lower Greensand bed in Monmouth County, New Jersey.
The fossil represented the extremities of the tibia and fibula, with astragalo-calcaneum ankylosed to the former, in length about sixteen inches, distal width fourteen. The confluence of the first series of tarsal bones with each other and with the tibia he regarded as a most interesting peculiarity, and one only met with elsewhere in the reptile Compsognathus as in birds. He therefore referred the animal to the order Symphopoda, near to Compsognathus.
The extremity of the fibula was free from, and received into a cavity of the astragalo-calcaneum, and demonstrated what the speaker had already asserted, that the fibula of Iguanodon and Hadrosaurus had been inverted by their describers. The medullary cavity was filled with open cancellous tissue. The species, which was one half larger than the type-specimen of Hadrosaurus foulkii, was named by Cope Ornithotarsus immanis.\\\"