Giant scaphitid ammonites from the Maastrichtian of Europe have generally been assigned to Acanthoscaphites NOWAK, 1911. Prior to the present study, this genus comprised five species: A. tridens (KNER, 1848), A. varians (LOPUSKI, 1911), A. verneuilianus (D'ORBIGNY, 1841), A . sp. of KENNEDY (1987) and A . sp. of KENNEDY & CHRISTENSEN (1997). Of the first-named taxon, material from Aachen-Schneeberg of Early Maastrichtian age, including the specimen illustrated by HOLZAPFEL (1887-89) long thought to have been lost, is described. Recently collected topotype material from Kazimierz Dolny, and from Rejowiec (Poland), of latest Maastrichtian age ( Belemnella kazimiroviensis Zone), allows A. varians to be revised. Specimens from the late Early and early Late Maastrichtian of NW Europe, assigned to A. varians , differ consistently in details of ornament, and are assigned to a new subspecies, A. v. blaszkiewiczi n. subsp. Style of ribbing and tuberculation of the varians stock differs from that of A. tridens to such an extent that a new subgenus, Euroscaphites n. subgen., is erected, with varians as type species. The Late Maastrichtian " Acanthoscaphites " verneuilianus , only known from phragmocones, is provisionally assigned to the new subgenus. The other two species previously referred to Acanthoscaphiles , viz. A . sp. of KENNEDY (1987) and A . sp. of KENNEDY & CHRISTENSEN (1997), both of Late Maastrichtian age, cannot be assigned confidently to either subgenus.