Amphizygus brooksii Bukry, 1969
Bipodorhabdus Noël, 1970
The loxolith calcareous nannofossils have double walls and a central area featuring a yoke cycle, creating a bifurcating traverse bar and large pores on both sides. The traverse bar supports a distal process, a distinctive feature of this species.
Bukry, D. 1969. Upper Cretaceous coccoliths from Texas and Europe. University of Kansas Paleontological Contributions, Articles 51 (Protista 2): 1-79.
Noël, D. 1970. Coccolithes Crétacés: La Craie Campanienne du Bassin de Paris. - Éditions du Centre National de la Recherche Scientifique, Paris. 1-129