Original description
M. E. Howgate. 1985. Problems of the osteology of Archaeopteryx: is the Eichstätt specimen a distinct genus?. In M. K. Hecht, J. H. Ostrom, G. Viohl, and P. Wellnhofer (eds.), The Beginnings of Birds: Proceedings of the International Archaeopteryx Conference, Eichstätt 1984. Freunde des Jura-Museums Eichstätt, Eichstätt