U is for Udelartitan, a saltisauroid titanosaur from Uruguay
V is for Venenosaurus, presumably non-venemous, but found in the Poison Strip member
W is for Wintonotitan, found on the point bar of a fossil river in Australia
X is for Xianshanosaurus, named after Xian mountain
Y is for Yamanasaurus, a saltisaurid from Ecuador
Z is for Zhuchengtitan, who lived among tyrannosaurs, ceratopsians, and giant hadrosaurs.