ammonites
Drinker nisti Bakker et al. 1990 (bird foot dinosaur)

Reptilia - Dinosauria

Full reference: R. T. Bakker, P. M. Galton, J. Siegwarth and J. Filla. 1990. A new latest Jurassic vertebrate fauna, from the highest levels of the Morrison Formation at Como Bluff, Wyoming, with comments on Morrison biochronology. Part IV. The dinosaurs: a new Othnielia-like hypsilophodontoid. Hunteria 2(6):8-19

Belongs to Drinker according to D. B. Norman et al. 2004

Sister taxa: none

Type specimen: CPS 106, a partial skeleton. Its type locality is Main Breakfast Bench Quarry, which is in a Tithonian deltaic sandstone/mudstone in the Morrison Formation of Wyoming.

Ecology: ground dwelling herbivore