Holotype

Carpenter, Kenneth (1999) Revision of North American elasmosaurs from the Cretaceous of the Western Interior; Paludicila, 2(2), pp.148-173

Refered Specimen (as holotype)

Everhart, Michael J. (2006) The occurrence of elasmosaurids (Reptilia: Plesiosauria) in the Niobrara Chalk of Western Kansas; Paludicila, 5(4), pp.170-183

Refered Specimen

Carpenter, Kenneth (1999) Revision of North American elasmosaurs from the Cretaceous of the Western Interior; Paludicila, 2(2), pp.148-173

Refered Specimen

Carpenter, Kenneth (1990) Upward continuity of the Niobrara fauna with the Pierre Shale Fauna; , pp.73-81

Refered Specimen

Carpenter, Kenneth (1999) Revision of North American elasmosaurs from the Cretaceous of the Western Interior; Paludicila, 2(2), pp.148-173

Refered Specimen

Carpenter, Kenneth (1999) Revision of North American elasmosaurs from the Cretaceous of the Western Interior; Paludicila, 2(2), pp.148-173

Refered Specimen

Carpenter, Kenneth (1999) Revision of North American elasmosaurs from the Cretaceous of the Western Interior; Paludicila, 2(2), pp.148-173

Refered Specimen

Carpenter, Kenneth (1999) Revision of North American elasmosaurs from the Cretaceous of the Western Interior; Paludicila, 2(2), pp.148-173

Refered Specimen

Cicimurri, David J and Everhart, Michael J. (2001) An Elasmosaur with Stomach Contents and Gastroliths from the Pierre Shale (Late Cretaceous) of Kansas; Transactions of the Kansas Academy of Science, 104(3-4), pp.129-143