Genus: Seitaad SERTICH & LOEWEN, 2010
Etymology: Dine/Navajo Seit aad, a mythological sand 'monster' of Dine Folklore that buried its victims in dunes.
Species: ruessi SERTICH & LOEWEN, 2010
Etymology: In honor of the young artists, poet, naturalist and explorer Everett Ruess (1914-1934), who mysteriously disappeared in 1934 while exploring southern Utah.
Holotype: UMNH VP 18040
Locality: UMNH VP locality 191 at ground level in a slot canyon below remains of the "Eagle's Nest" cliff deweling, Comb Ridge, San Juan County, Utah.
Horizon: Base of the Navajo Sandstone, Glen Canyon Group.
Note: 1 meter above an interbedded mudstone and sandstone facies of the Kayenta Formation.
Age: Pliensbachian Stage, Lias Epoch, Early Jurassic.
Material: Articulated partial postcranial skeleton including portions of 11 dorsal vertebrae, 16 dorsal ribs, both pectoral girdles, a nearly complete left and partial right forelimb, partial pelvis, partial left hind limb, and partially articulated array of gastral ribs.