Shells unicellular (very seldom), may be pseudotwo-chambered, pseudomultichambered, but mostly multichambered, the predominant type of coiling - irregular- and regular glomerate, planospiral more often combined with one of the glomerate ones, (trochospiral only as an exception); shells of the higher representatives could be cyclical and fusulinoid in form; the presence of flexostyle is typical of the majority of the groups; chambers predominantly tubular, usually two per volution (only in Soritida broad and more numerous per volution), in higher representatives chamber number increases to several thousands, chamber lumen could be subdivided by the septa (sometimes by the primary and the secondary ones),by pillars, advanced forms may have integrative systems (stolons, tunnels), inner apertural systems not developed, canal system absent; shell wall - monofontinal, agglutinated in the lower forms (subclass Schlumbergerinana), in the higher ones (subclass Miliolana) - porcellaneous, with the irregular not put into shape pseudopores between irregular randomly oriented needles of crystal units, chamber growth occurs by the gradual addition of the wall part by part, organic and secretion elements are laid simultaneously; aperture terminal in position, simple in the most primitive forms, in more complex ones - with the outer (flap) or inner tooth of a special structure, sometimes aperture secondarily multiple, additional apertures non developed (only as an exception); nuclear apparatus heterokariotic in higher secretious forms, sometimes with the polymerization of somatic nuclei (Sorites); in Triloculina gametes are known as biflagellate (and having the axostyle?); bottom forms, mostly free living, more rarely attached. Carbon - Holocene.