Fossil group

Alveolina oblonga

Foraminifera · Paleocene – Eocene

Elongate, spindle-shaped larger foraminifera whose finely-chambered interior recalls a grain of wheat. Restricted to warm, shallow water, they evolved rapidly and are key to zoning the Paleocene–Eocene.

A broad fossil group rather than a single taxon — the units below record it among their fauna or flora.