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The Late Carboniferous and Permian: Aquatic vertebrate zonation in Southern Spain and German basins. Courier Forschungsinstitut Senckenberg, 223, 543–561

Soler-Gijón, R. (1999)
Occipital spine of Orthacanthus (Xenacanthidae, Elasmobranchii): structure and growth. Journal of Morphology, 242(1), 1–45
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Heidtke, U.H.J. (1998)
Revision der Gattung Orthacanthus Agassiz 1843 (Chondrichthyes: Xenacanthida). Paläontologische Zeitschrift, 72(1/2), 135–147
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Soler-Gijón, R. (1997)
New discoveries of xenacanth sharks from the Late Carboniferous of Spain (Puertollano Basin) and Early Permian of Germany (Saar-Nahe Basin): Implications for the phylogeny of xenacanthiform and anacanthous sharks. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, 205(1), 1–31
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Soler-Gijón, R. (1997)
Orthacanthus meridionalis, a new xenacanth shark (Elasmobranchii) from the Upper Carboniferous of the Puertollano basin, Spain. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, 204(2), 141–169