Jurado, C.D., Mabragaña, E. & Astarloa, J.M.D.D. (2017)

Morphological variation in a conservative structure: the scapulocoracoids in Sympterygia acuta Garman, 1837 and Sympterygia bonapartii Müller & Henle, 1841 (Chondrichthyes: Rajidae)

. Zootaxa, 4318 (1), 157–166.