A large sample of microvertebrates from the Sarmatian s. Str. of Gratkorn (Austria, Styria) has recently been recovered. The recovered rodent fauna is diverse and includes a few castorid remains that are described here. Such remains comprise isolated teeth, a palate and a fragmentary skull that are ascribed to the small-sized beaver Euroxenomys minutus minutus (Von Meyer, 1838). These finds are discussed with regard to the Austrian Miocene castorid record. © 2014 Senckenberg Gesellschaft für Naturforschung and Springer-Verlag Berlin Heidelberg.