Scampanella bispinosa
Scampanella bispinosa Perch-Nielsen in Perch-Nielsen & Franz, 1977
Very tall species of Scampanella have a very high distal tier with smooth parallel sides and a very low cone with possibly two spines. The ratio of height to the width of species [excluding spines and collar] is between 1.5 to 2.0 whiles the ratio of distal tier to the cone is about 3.
The dimensions of the Scampanella bispinosa and Scampanella wisei Perch-Nielsen in Perch-Nielsen & Franz, (1977) are very similar without spines. They can not be separated if the spines are removed by adverse preservational conditions. If the spines are preserved, Scampanella bispinosa has 2 spines [1 vertical and 1 at about 45°] whilst Scampanella wisei has 3 asymmetrically arranged spines.
Perch-Nielsen, K., Franz, H. E., 1977. Lapideacassis and Scampanella, calcareous nannofossils from the Paleocene at sites 354 and 356, DSDP Leg 39, Southern Atlantic. Initial Reports of the Deep Sea Drilling Project 39, 849-862.
Holotype
Scampanella bispinosa
Perch-Nielsen, in Perch-Nielsen & Franz, 1977
Early Paleocene
DSDP Leg 39, Sites 356, Sào Paulo Plateau, South Atlantic Ocean