Belemnitella is a genus of belemnite from the Late Cretaceous of Europe and North America.

Belemnitella was a squidlike animal, probably related to the ancestors of modern squids and cuttlefish.

The phragmocone (internal shell) has a small protoconch at its tip, and fit into the cavity and the guard.

It also had septa and a ventral siphuncle (tube filled with living tissues running through chambers) within the phragmocone, projecting forward as a beak-like blade.

[1][2][3] Belemnitella americana, is the source of the Pee Dee Belemnite, reference standard in research.