Thespesius
Thespesius ( meaning "wondrous one" ) is a dubious genus of hadrosaurid dinosaur from the late Maastrichtian-age Upper Cretaceous Lance Formation of South Dakota . 
<triplet> late Maastrichtian <subj> Upper Cretaceous <obj> part of <triplet> Upper Cretaceous <subj> late Maastrichtian <obj> has part