Species: rex (KNIGHT, 1895) KNIGHT, 1898
Etymology: Latin, rex, "king."
= Cimoliasaurus rex KNIGHT, 1895

Holotype: UW 4602

Locality: Wind River Basin, Natrona County, Wyoming.

Horizon: Upper Redwater Shale Member, Sundance Formation.

Biostratigraphy:

Age: Late Oxfordian Stage, Lower Malm Epoch, Late Jurassic.

Material: Cervical, dorsal and caudal vertebrae, humerus, ulna, radius, phalanges, ribs and greater portion of the pectoral girdle.

New material from type locality, WHAL, ROSS & MASSARE, 2007: Vertebral centrum, matrix filled neural arch, possible limb girdle element, and epipodial element.
Note: Paleopathology, 2 humeri shows avascular necrosis. (ROTHSCHILDS & STORRS, 2003)

New material from type locality, WAHL, MASSARE & ROSS, 2010: Articulated distal forelimb.

Note: WHAL, ROSS & MASSARE, 2007 have found possible gut contents consisting of coleoid (belemnite) tentacle hooklests and jaw elements.

Referred material:

WAHL, MASSARE & ROSS, 2010

Locality: Natrona County, Wyoming.

Horizon: Upper Redwater Shale Member, Sundance Formation.

Biostratigraphy:

Age: Late Oxfordian Stage, Lower Malm Epoch, Late Jurassic.

Material:

UW 24238: Weathered neural arch.

 

Locality: Hot Springs County, Wyoming.

Horizon: Upper Redwater Shale Member, Sundance Formation.

Biostratigraphy:

Age: Late Oxfordian Stage, Lower Malm Epoch, Late Jurassic.

Material:

WEC SS019: A very weathered propidal fragment.

 

WEEMS & BLODGETT, 1996

Localitiy: Exact locality unknown, "near mouth of Kejulik River", Alaska Peninsula, Alaska.

Horizon: Naknek Formation.

Biostratigraphy:

Age: Kimmeridgian Stage? Malm Epoch, Late Jurassic.

Material:

USNM 41849: Distal end of humerus.