Rotaliida

Taxobox
name = Rotaliida
fossil_range = Triassic - Recent
domain = Eukaryota
regnum = Rhizaria
phylum = Foraminifera
ordo = Rotaliida
subdivision_ranks = Superfamilies
subdivision =
Acervulinacea
Annulopatellinacea
Asterigerinacea
Bolivinacea
Bolivinitacea
Bulminacea
Cassidulinacea
Chilostomellacea
Delosinacea
Discorbacea
Discorbinellacea
Eouvigerinacea
Fursenkoinacea
Glabratellacea
Loxostomatacea
Nonionacea
Nummulitacea
Orbitoidacea
Planorbulinacea
Pleurostomellacea
Rotaliacea
Siphoninacea
Stilostomellacea
Turrilinacea
The Rotaliida are a large and abundant group of foraminiferans. They are primarily oceanic benthos, although some are common in shallower waters such as estuaries. They also include many important fossils, such as nummulites. Rotaliids produce hyaline tests, in which the microscopic crystals may be oriented either radially (as in other forams) or obliquely.