Genus: Aardonyx YATES, BONNAN, NEVELING, CHINSAMY & BLACKBEARD,
Etymology: Afrikaans, aard, "Earth," and Greek, onyx, "claw." Gender is masculine.The genus names referes to the thick hematite encrustation of many of the bones, particulary the ungual phalanges, in the type quarry.
Species: celestae YATES, BONNAN, NEVELING, CHINSAMY & BLACKBEARD,
Etymology: In honor of Celeste Yates who prepared many of the bones.
Locality: Marc's Quarry (MQ) bone bed, farm Spion Kop 932, Senekal District, Free State, South Africa.
Horizon: Upper Elliot Formation, Stormberg Group.
Age: Hettangian-Lower Sinemurian Stage, Lower Lias Epoch, Early Jurassic.
Material: Rostral half of a left maxilla.
Skull elements, mandibular elements, cervical, dorsal, sacral and caudal vertebrae, cervical ribs, dorsal ribs, gastralia, chevrons, pectoral girdle elements, pelvic girdle elements and bones of both the fore- and hind limbs, manus and pes.