Genus: Arkansasaurus HUNT & QUINN, 2018
Etymology: In refrence to the state of Arkansas where the specimen was discovered, and Greek, sauros, "lizard."
Note: The name Arkansaurus fridayi was first used in a newspaper article (1972).
Species: fridayi HUNT & QUINN, 2018
Etymology: In honor of Joe B. Friday, who discovered the specimen in 1972.
Note: “Arkansaurus fridayi" Anonymous, 1972 (nomen nudum)
Holotype: UAM 74-16
Locality: Friday Site, near Lockesburg, Sevier County, Arkansas.
Note: Precise locality information is availble upon request from the University of Arksansas Museum for qulified researchers.
Horizon: Trinty Strata, Glen Rose Formation.
Biostratigraphy:
Age: Albian-Aptian Stage, Middle Gallic subepoch, Earliest Gulf Epoch, Early Cretaceous.
Material: Right metatarsals, phalanges and unguals.
Break down as follows;
UAM 74-16-1: Metatarsal IV.
UAM 74-16-2: Metatarsal III
UAM 74-16-3: Metatarsal II.
UAM 74-16-4: Pedal phalanx III-1.
UAM 74-16-5: Pedal phalanx II-2.
UAM 74-16-6: Pedal phalanx IV-1.
UAM 74-16-7: Pedal phalanx II-2
UAM 74-16-8a-c: 3 pedal ungals.