Marcin Machalski

Eric W. A. Mulder, Andrzej Radwanski, John .W.M Jagt, Rudi W. Dortangs

Academic paper

Acta Zoologica Polonica

48

3

397-408

Isolated marginal teeth and tooth crowns of Late Campanian and Late Maastrichtian mosasaurid reptiles (Squamata, Platynota) from the Wis?a River valley area, central Poland, are described and illustrated. These comprise two Late Campanian taxa from Piotrawin quarry: Prognathodon sp. and Plioplatecarpinae sp. A., and four late Late Maastrichtian taxa from Nasi?ów quarry: Mosasaurus cf. hoffmanni Mantell, 1829, M. cf. lemonnieri Dollo, 1889c, �Mosasaurus (Leiodon) cfr. anceps� sensu Arambourg (1952), and Plioplatecarpinae sp. B. In addition, the previously described frag? mentary jaw with associated teeth of the Late Campanian age from Maruszów quarry (west of the Wis?a River area), is re? assigned to Mosasaurus cf. hoffmanni. This specimen suggests that M. hoffmanni or a closely related (ancestral?) species already appeared in Europe during the Late Campanian (well?documented European occurrences of M. hoffmanni are Late Maastrichtian in age). At least part of the described mosasaur material is likely to stem from periodic feeding in the area (broken?off or shed tooth crowns) or from floating carcasses (complete teeth and jaw fragments).

Reptilia, Squamata, Platynota, Mosasauridae, Upper Cretaceous, Campanian, Maastrichtian, Poland

English