Ansulasphaera bownii Rahman & Roth, 1991
Rahman, A. & Roth, P. H. 1991. Upper Jurassic calcareous nannofossils from the DSDP Site 534 in the Blake Bahama Basin, western North Atlantic. Eclogae Geologicae Helvetiae. 84: 765-789.
Ansulasphaera bownii
Rahman & Roth, 1991
Late Kimmeridgian