Biantholithus astralis Steinmetz & Stradner, 1984
Species of Biantholithus Bramlette & Martini (1964) have seven to eight segments partly in contact along their length.
Biantholithus astralis differs from Biantholithus hughesii Varol (1989) by having seven to eight segments, whereas the latter has only six segments.
Biantholithus astralis is distinguished from seven to eight segmented Biantholithus sparsus Bramlette & Martini (1964) by having segments partly in contact throughout their length. In the latter, the segments are in contact at their entire length.
Bramlette, M. N. & Martini, E., (1964): The great change in calcareous nannoplankton fossils between the Maastrichtian and Danian. - Micropaleontology. 10(2): 291-322.
Steinmetz, J. C. & Stradner, H., (1984): Cenozoic calcareous nannofossils from Deep Sea Drilling Project Leg 75, Southeast Atlantic Ocean. - Initial Reports of the Deep Sea Drilling Project. 75: 671-753.
Steinmetz & Stradner, 1984
DSDP Leg 75, Site 530A, Angola Basin, Southeast Atlantic Ocean