Müller, J. (1851). Monographie der Petrefacten der Aachener Kreideformation. Zweite Abtheilung. Henry & Cohen, Bonn, 88 pp. + pls. 3–6. page(s): 13, pl. 3, fig. 18a, b [details]
original descriptionMüller, J. (1851). Monographie der Petrefacten der Aachener Kreideformation. Zweite Abtheilung. Henry & Cohen, Bonn, 88 pp. + pls. 3–6. page(s): 13, pl. 3, fig. 18a, b [details]
Present Inaccurate Introduced: alien Containing type locality