Trionyx

Sahni, Ashok, 1972, The vertebrate Fauna of the Judith River formation, Montana, Bulletin of the American Museum of Natural History 147 (6), pp. 319-416 : 350

Trionyx sp.

Together with Basilemys, Trionyx forms the bulk of the identifiable turtle fragments. The abundance of the trionychids is another indication of the freshwater environment in which the deposits of the Judith River Formation were laid down.