Species: sculpta HAY 1908 (nomen dubium)
Etymology:

Holotype: CM 917

Locality: “Marsh Quarry”, 8 miles north of Canon City, Fremont County, Colorado.

Horizon: Morrison Formation.

Biostratigraphy: Zone?

Age: Comobluffian age, ? Stage, uppermost Malm Epoch, Late Jurassic.

Material: Fragmentary shell of a juvenile.

Referred material:

OSTROM & McINTOSH, 1966

Locality: Marsh-Felch’s YPM Quarry 1, Garden Park, Sec. 28, T17S, R70W, Canyon City, Fremont County, Colorado.

Horizon: Salt Wash Member, Morrison Formation.

Biostratigraphy: Zone 2.

Age: Comobluffian age, Kimmeridgian Stage, uppermost Malm Epoch, Late Jurassic.

Material:

Number: Not given: