Reptilia - Sauropterygia - Polycotylidae

Alternative combination: Dolichorhynchops kirki

Full reference: L. S. Russell. 1935. A plesiosaur from the Upper Cretaceous of Manitoba. Journal of Paleontology 9(5):385-389

Belongs to Trinacromerum according to K. Carpenter 1996

Sister taxa: Trinacromerum bentonianum, Trinacromerum lafquenianum

Type specimen: Its type locality is Northwest of Treherne, which is in a Cenomanian/Turonian marine horizon in the Favel Formation of Canada

Ecology: aquatic carnivore