Nannotax Enabling nannofossil research

Description: Elongate (up to 50μm). All three blades identical, without ridges.

Remarks: As noted by Martini (1965) specimens vary considerably in dimensions with two main types:

• (A) long thin specimens with parallel sides (entire specimens 25 - 50 x 1.5 - 2.5 microns, my obs.);
• (B) shorter and broader specimens with distinct taper (15 - 25 x 2 - 4 microns, my obs.).

There does not, however, seem to be any consistent pattern to the distribution of these forms.

Range: NP25-NN2, distribution rather sporadic.