The type species, Latirhinus uitstlani, was named in 2012 on the basis of a partial skeleton from the Campanian-age Cerro del Pueblo Formation.

During the 1980s, a team from UNAM's Geological Institute, including Shelton P. Applegate, René Hernández-Rivera, Espinosa-Arrubarrena, the SEPC team, and some volunteers, excavated the remains of a dinosaur near the town of Presa de San Antonio, belonging to the Cerro del Pueblo Formation in the Parras Basin, located in Coahuila, Mexico.

Serrano-Brañas, in 2006, identified one of the bones collected as a supposed nasal, and together with the appendicular skeleton, he referred to the genus Gryposaurus in his thesis.

[5][6] The holotype specimen, IGM 6583, consists of a partial skeleton including a partial right nasal, 10 dorsal and 14 caudal vertebrae, the right coracoid, left scapula, both humeri and ulna, right III and IV metacarpals, periacetabular process of Right ilium, iliac peduncle of the right ischium, both femurs, tibiae, and fibulae, left talus, right and left metatarsals III and IV, and several proximal phalanges of the right foot.

However, some authors suggest that it was actually a lambeosaurine, instead of a saurolophine as it was initially described, thus making the phylogenetic position of this animal in relation to other hadrosaurids still uncertain.