TABLE 3 in A new diplodocine sauropod from the Morrison Formation, Wyoming, USA

TABLE 3. Measurements of the thoracic ribs of Ardetosaurus viator MAB011899 (in mm). DimensionRL1RL?4RL?8RR?3RR?4RR?5Proximodistal length of rib490*1050*605*980*900*875*Maximum length of capitulum270Anteroposterior length capitular facet16Dorsoventral height capitular facet83Maximum length tuberculum19722990*Anteroposterior length tubercular facet182619Transverse width tubercular facet306649Distance between tuberculum and capitulum161Angle between tuberculum and capitulum~9055Maximum diameter midshaft166942755345Minimum diameter midshaft62224382919Maximum diameter distal shaft11Minimum diameter distal shaft7 Notes: Asterisks indicate estimates. Because no rib is complete, the proximodistal length is an estimate of the preserved parts. For RL1, the angle between the tuberculum and capitulum cannot be measured, as only the base is preserved of the capitulum. However, an estimate can be made. For RR?5, the capitulum is absent, resulting in an estimate as the intersecting line cannot confidently be placed on the rib head.