O'KEEFE, STREET, CAVIGELLI, SOCHA & O'KEEFE, 2009
Locality: North of the town of Greybull, Bighorn County, Wyoming.
Horizon: Upper Member, Sundance Formation.
Biostratigraphy:
Age: Oxfordian Stage, Lower Malm Epoch, Late Jurassic.
Material:
USNM 536965: 4 dorsals, 3 sacrals, 8 caudals, complete pelvis, numerous rigs and gastroliths.
Note: Has 13 complete rings and fragments of 4 more vertebrae of an embryo of the ichthyosaur Ompthalmosaurus natans.
O’KEEFE & WAHL, 2003a
Locality: Off 33 Mile Road near Roughlock, Natrona County, Wyoming.
Horizon: Redwater Shale Member (Baptanodon beds), Sundance Formation.
Biostratigraphy:
Age: Oxfordian, Lower Malm Epoch, Late Jurassic.
Material:
UW 15938: Associated vertebral column and basioccipital.
WAHL, 2012
Locality: Bighorn Basin, Wyoming.
Horizon: Redwater Shale Member, Upper Sundance Formation.
Biostratigraphy:
Age: Oxfordian Stage, Lower Malm Epoch, Late Jurassic.
Material:
WEC-SS01: Fragmentary skeleton of a juvenile.
Note: With stomach contents with a mass of coleoid hooklets and disarticulated cardiocerid ammonite jaws.
WILHELM & O'KEEFE, 2010 (published in 2011)
Locality: North of the town of Shell, Bighorn County, Wyoming.
Horizon: Upper Member, Sundance Formation.
Biostratigraphy:
Age: Oxfordian Stage, Lower Malm Epoch, Late Jurassic.
Material:
USNM 53693: 3 articulated posterior cervical vertebrae and fragments of a fourth, and the last probably the first pectoral.
= Muraenosaurus reedii MEHL, 1912 (nomen dubium)
Etymology:
Holotype: UW 5544
Locality: Freeze Out Mountains, Carbon County, Wyoming.
Horizon: Redwater Shale Member (Baptanodon beds), Sundance Formation.
Biostratigraphy:
Age: Oxfordian, Lower Malm Epoch, Late Jurassic.
Material: A fairly complete right coracoid and a part of a left one, parts of the right and left pubes and ischia, numerous dorsal and caudal vertebrae, several ventral ribs, and a nearly complete left pectoral paddle.
