Genus: Yamanasaurus APESTEGUIA, LUZURIAGA, GALLINA, GRANDA, & JARAMILLO, 2020
Etymology: In reference to the provenance locality, Yamana, in the Casanga Valley, southwestern Ecuador, and Greek, sauros, "lizard."
Species: lojaensis APESTEGUIA, LUZURIAGA, GALLINA, GRANDA, & JARAMILLO, 2020
Etymology: In reference to the Province of Loja, where the material was found.
Holotype: YM-UTPL_002, 104 to 017
Locality: Yamana Region, Paltas Canton, Alamor-lancones Basin, Loja Province, Southwestern Ecuador.
Horizon: Rio Playas Formation (= Casanga Formation).
Age: Upper Maastrichtian Stage, Late Senonian Subepoch, Late Gulf Epoch, Late Cretaceous.
Breakdown as follows;
YM-UTPL_002: 2 conjoined sacral vertebrae.
YM-UTPL_014: A fragment comprising approximately the posterior half of a caudal procoelous vertebra.
YM-UTPL_015: Proximal half of a radius.
YM-UTPL_016: Proximal half of a left humerus.
YM-UTPL_017: A very eroded fragment possibly the proximal part of a tibia.