Ewa. Mulder et H. Mai, The oldest tylosaurine mosasaur (Reptilia; Lacertilia) from the Late Cretaceous of Belgium: Hermann von Meyer (1860) revisited, GEOL MIJNB, 78(2), 1999, pp. 207-213
A mosasaurid parietal from the Late Cretaceous of Belgium, originally descr
ibed by Von Meyer (1860), turns out to be assignable to the tylosaurine Hai
nosaurus cf. bernardi Dollo 1885. A small sediment sample, extracted from t
he bone, was analysed for coccoliths and revealed its early Late Campanian
age. This is thus the earliest record of a tylosaurine mosasaur from Belgiu
m.