Genus: Stegouros SOTO-ACUNA, VARGAS, KALUZA, LEPPE, BOTELHO, PALMA-LIBERONA, SIMON-GUTSTEIN, FERNANDEZ, ORTIZ, MILLA, ARAVENA, MANRIQUEZ, ALARCON-MUNOZ, PINO, TREVISAN, MANSILLA, HINOJOSA, MUNOZ-WALTHER & RUBILAR-ROGERS, 2021
Etymology: Greek, stegos, "roof" and Greek, uros, "tail." in reference to the covered tail.

Species: elengassne SOTO-ACUNA, VARGAS, KALUZA, LEPPE, BOTELHO, PALMA-LIBERONA, SIMON-GUTSTEIN, FERNANDEZ, ORTIZ, MILLA, ARAVENA, MANRIQUEZ, ALARCON-MUNOZ, PINO, TREVISAN, MANSILLA, HINOJOSA, MUNOZ-WALTHER & RUBILAR-ROGERS, 2021
Etymology: Elengassen, after an armoured beast in the mythology of the local Aonik'enk people.

Holotype: CPAP-3165

Locality: Rio de las Chinas Valley, Estancia Cerro Guido, Magallanes Regon, Patagonia, Chile.

Horizon: Lower section, Dorotea Formation.

Biostratigraphy:

Age: Late Campanian-Early Maastrichtian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material: Fragmentary skull and fragmentary skeleton with body, and tail armor.