Laosaurus
The type species , Laosaurus celer , was first described by O . C . Marsh in 1878 from remains from the Oxfordian-Tithonian-age Upper Jurassic Morrison Formation of Wyoming . 
<triplet> Oxfordian <subj> Upper Jurassic <obj> part of <triplet> Tithonian <subj> Upper Jurassic <obj> part of <triplet> Upper Jurassic <subj> Oxfordian <obj> has part <subj> Tithonian <obj> has part