Fossil group

Benthic foraminifera (Aulotortus friedli, Agathammina)

Foraminifera · Cambrian – Recent

Sea-floor–dwelling foraminifera — single-celled marine protists that build a mineralised, often many-chambered shell (test). They range from tiny forms to the large, complex "larger foraminifera", and their assemblages track water depth, temperature and salinity.

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