A new paper:
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Latirhinus uitstlani as originally conceived represents a chimera, composed of five individuals of different size, identified as saurolophines and lambeosaurines.
Latirhinus uitstlani retained as valid species, composed of caudal vertebrae, forelimb, hindlimb, the pectoral and pelvic girdle.
Latirhinus uitstlani was reclassified as lambeosaurine and its diagnosis was amended with autapomorphic characters in its coracoid, humerus and illium.
The other original holotype components of Latirhinus were reclassified as a large saurolophine, a small saurolophine, and a small lambeosaurine indet.
Abstract
This work presents a detailed study of the bones from the holotype of Latirhinus uitstlani. A Mexican hadrosaurid species known informally as "Isauria", discovered by Don RamÃn LÃpez, from the Upper Cretaceous Cerro del Pueblo Formation of Coahuila. The results indicate that this Campanian species from the Ejido Presa San Antonio is a chimera or Frankenstein. Its holotype originally includes bones that were individually misinterpreted, belonging to individuals of different sizes, identifiable to saurolophines and lambeosaurines, even, one bone coming from a different locality. Therefore, after classifying the components of the holotype, we rediagnosed L. uitstlani from its pectoral appendicular bones and pelvic bones, confirming their validity as a species. It was also reclassified as a member of the Lambeosaurine subfamily rather than to Saurolophine, and with an estimated body length of 8.72âm. In addition, we identified a large saurolophine, represented by three specimens, and a small lambeosaurine from the same locality of L. uitstlani, along with a small saurolophine from the Cerro de los Dinosaurios area, originally including in the holotype.