Species: tropicensis (McKEAN, 2012) CLARK, O’KEEFE & STACK, 2024
Etymology: In reference to the Tropic Shale, Tournian, Early Late Cretaceous, the formation from which this specimen and many other notable plesiosaur specimens have been discovered.
= cf. Dolichorhynchops sp SCHMEISSER & GILLETTE, 2009

Holotype: MNA V10046/GLCA 23189

Locality: MNA locality 1627, Glen Canyon National Recreation area, near the border with Grand Staircase-Escalante National Monument, Kane County, Utah.

Note: Precise locality information on file at the Museum of Northern Arizona.

Horizon: Trophic Shale.

Biostratigraphy:

Age: Lower Turonian Stage, upper Gallic subepoch, lower Gulf Epoch, Early Late Cretaceous.

Material: Complete skull, nearly complete dentition, and incomplete set of vertebrae and scapulae, coracoids, ilia, ichia, pubes, nearly complete forelimbs and hindlinbs.

Note: 289 gastroliths.

Note found with Scapanorhynchus raphiodon tooth, and may have scavenged the carcass (ALBRIGHT, GILLETTE & TITUS, 2013).

Referred material:

Locality: MNA locality 1483, Glen Canyon National Recreation area, near the border with Grand Staircase-Escalante National Monument, Kane County, Utah.

Note: Precise locality information on file at the Museum of Northern Arizona.

Horizon: Trophic Shale.

Biostratigraphy:

Age: Lower Turonian Stage, upper Gallic subepoch, lower Gulf Epoch, Early Late Cretaceous.

MNA V9431/GLCA 23761: Vertebrae, rib fragments, partial fragments of the scapulae, coracoids, ischia, and pubis, complete ilium, and many unidentified fragments.