New data concerning the familial position of the genus Euronyctibius (Aves, Caprimulgiformes) from the paleogene of the Phosphorites du Quercy, France

The extinct genus Euronyctibius was described from a proximal part of humerus from an unknown locality in the Phosphorites du Quercy, France. New material referable to this genus shows that Euronyctibius is more closely related to the Steatornithidae than to the Nyctibiidae. It is here attributed to a stem group representative of the family Steatornithidae. The Recent Steatornithidae includes only the South American monospecific genus, Steatornis , but during the Paleogene this family was also present in North America as well as in Europe.