Mark-Kurik, E. y Carls, P. 2021. Tityosteus, a marine fish (Arthrodira, Homostiidae) from the Emsian of Aragón, Spain, and its distribution. Spanish Journal of Palaeontology. 19, 2 (mar. 2021), 139–144. DOI:https://doi.org/10.7203/sjp.19.2.20528.