Genus: Caieiria SILVA JUNIOR, MARTINELLI, MARINHO, da SILVA & LANGER, 2022
Etymology: In reference to "Caieira", the site where the type-specimen was unearthed.

Species: allocaudata SILVA JUNIOR, MARTINELLI, MARINHO, da SILVA & LANGER, 2022
Etymology: Greek, allos, "strange" and Latin, cauda, "tail."
Note: Orignal paratype of Trigonosaurus pricei.

Holotype: MCT 1719-R

Locality: "Caieira" (Locality 120 of Bertini, 1993), an abandoned quarry from Sao Luis Farm, Veadinho Hill, situated about 2 km north of Peiropolis, Municipality of Uberaba, Minas Gerais State, Brazil.

Horizon: Marilia Formation, Bauru Group.

Biostratigraphy:

Age: Upper Campanian Stage- Lower Maastrichtian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: 10 anterior to middle caudals.