Cylindralithus? echinus Bukry, 1975
Petrobrasiella? bownii Burnett, 1997
Bukry, D. 1975b. Coccolith and silicoflagellate stratigraphy, northwestern Pacific Ocean, Deep Sea Drilling Project Leg 32. Initial Reports of the Deep Sea Drilling Project 32: 677-701.
Burnett, J. A., 1997c. New species and new combinations of Cretaceous nannofossils and a note on the origin of Petrarhabdus (Deflandre) Wise & Wind. Journal of Nannoplankton Research 19(2), 133-146.