Tornieria
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Tornieria is a genus of diplodocid sauropod dinosaur from the Late Jurassic in Lindi Region of Tanzania. It has a convoluted taxonomic history.
Diplodocus
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Diplodocus was a genus of diplodocid sauropod dinosaurs, whose fossils were first discovered in 1877 by S. W. Williston. The generic name, coined by Othniel Charles Marsh in 1878, is a Neo-Latin term derived from Greek διπλός (diplos) "double" and δοκός (dokos) "beam", in reference to the double-beamed chevron bones located in the underside of the tail, which were then considered unique.
Caudal vertebrae of D. carnegii showing the double-beamed chevron bones to which the genus name refers, Natural History Museum, London
Reconstruction of D. carnegii with horizontal neck, flexible whip tail, keratinous spines and nostrils low on the snout
Barnum Brown (left) and Henry Osborn (right) excavating a femur of Diplodocus hallorum (AMNH 223), 1897.