Seunaster bouillei Cotteau in de Bouille, 1873; Upper Maastrichtian, Sarasate, Navarra, Spain. Camera lucida drawings of oral plating (left) and aboral plating (right).
From A. B. Smith, J. Gallemi. C. H. Jeffery, G. Ernst & P. D. Ward 1999. Late Cretaceous-early Tertiary echinoids from northern Spain: implications for the Cretaceous-Tertiary extinction event. Bulletin of the Natural History Museum, London (Geology Series) 55, 81-137.