S. Welles

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and Oldest known marine turtle? A new protostegid from the Lower Cretaceous of Colombia.

J. F. Parham, E. Cadena, J. Cooper, 2015 .

A revision of the labyrinthodont family Capitosauridae : and a description of Parotosaurus Peabodyi, N. Sp. from the Wupatki member of the Moenkopi formation of Northern Arizona

S. Welles, J. Cosgriff, 1965 .

Hadrokkosaurus bradyi from the upper Moenkopi formation of Arizona : with a review of the Brachyopid labyrinthodonts

S. Welles, R. Estes, S. P. Welles, 1969 .

Dilophosaurus (Reptilia, Saurischia), a new name for a dinosaur

S. Welles, 1970 .

Dilophosaurus Wetherilli (Dinosauria, Theropoda). Osteology and comparisons

S. Welles, 1984 .

A new species of elasmosaur from the Aptian of Colombia and a review of the Cretaceous plesiosaurs

S. Welles, 1962 .

NEW JURASSIC DINOSAUR FROM THE KAYENTA FORMATION OF ARIZONA

S. Welles, 1954 .

THE TARSUS OF THEROPOD DINOSAURS

S. Welles, R. A. Long, 1974 .

Elasmosaurid plesiosaurs with description of new material from California and Colorado

S. Welles, 1943 .

Alzadasaurus pembertoni, a new elasmosaur from the Upper Cretaceous of South Dakota

S. Welles, J. D. Bump, 1949 .

The first record of the plesiosaurian genus Polyptychodon (Pliosauridae) from the New World

S. Welles, B. Slaughter, 1963 .

Triassic Dicynodont reptiles

S. Welles, C. Camp, 1958 .

New Zealand Ichthyosaurs—a summary, including new records from the Cretaceous

D. Gregg, C. Fleming, S. Welles, 1971 .