Genus: Natronasaurus ULANSKY, 2014a
Etymology:

Species: longispinus (GILMORE, 1914) ULANSKY, 2014a
Etymology:
= Stegosaurus longispinus GILMORE, 1914

Holotype: (UW 20503) D54

Locality: About 1 1/2 miles east of Alcova, Natrona County, Wyoming.

Horizon: Member? Morrison Formation.

Biostratigraphy: Zone?

Age: Age?, Stage?, Malm Epoch, Late Jurassic.

Material: 42 vertebrae, fragmentary sacrum, 2 ischia, portion of one pubis, right femur, several ribs and 4 dermal tail spines.
Note: Lost?
Note: USNM has casts of the tail spines.