Ichnospecies: williamsi WELLES, 1971
Etymology: Named for Jesse Williams, who found the first dinosaur in the Kayenta
Formation.
Holotype: UCMP 79690-4
Locality: UCMP V67239, on the west side of the road to Moenave, 0.15 miles N. of highway to Tuba City, Coconio County, Arizona.
Horizon: Kayenta Formation.
Biostratigraphy:
Age: ?Sinemurian-Pliesbachian Stage, Middle Lias Epoch, Middle Early Jurassic.
Material: A single large tridactyl footprint.
Hypodigm:
UCMP 79690-1, 2, 3: 3 other footprints.
DEMATHIEU & SCIAU, 1992Locality: Sauclieres, Ayeyron, Causse du Larzac, France.
Horizon:
Biostratigraphy:
Age: Hettangian Stage, Lower Lias Epoch, Early Jurassic.
Material:
Number: Not given: Trackway number 3.