Species: muirkirkensis KRANZ, 1996 (nomen dubium)
Etymology: In reference to the Muirkirk site, northern Prince Georges County, Maryland.

Holotype: USNM 33977

Locality: Muirkirk site, Laurel Quadrangle, USGS 1:24,000, 1979, northern Prince Georges County, Maryland.

Horizon: Arundel Formation, Potomac Group.

Biostratigraphy:

Age: Upper Aptian-Lower Albian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material: Tooth.