A. Nutzel et Erwin D.h, Battenizyga; a new Early Triassic gastropod genus with a discussion of the caenogastropod evolution at the Permian/Triassic boundary, Palaontologische Zeitschrift Palaontologische Zeitschrift (Print);Journal of Palaontologische Gesellschaft Scientific contributions to palaeontology, 76(1), 2002, pp. 21-27