John W. M. Jagt, Raymond W. J. M. van der Ham, Roland Meuris, Ludo Indeherberge; A note on Salenia gr. nutrix Peron and Gauthier, 1881 (Echinoidea) from the Maastrichtian type area (southeastern Netherlands, northeastern Belgium). Journal of Paleontology ; 73 (4): 663–666. doi:
A single specimen of a saleniid echinoid recently collected from the Late Maastrichtian of the type area of the Maastrichtian Stage is notable in being closely related to Salenia nutrix Peron and Gauthier, 1881. Representatives of the "nutrix group" have previously been recorded from the Late Cretaceous of the Mediterranean and north Africa. The occurrence in the type Maastrichtian of a representative of this group thus furnishes additional evidence of Tethyan incursions in the area during the Late Maastrichtian.