Phylum Foraminifera d'Orbigny, 1826 see Subphylum Foraminifera d'Orbigny, 1826 Status: extant Class Miliolata Saidova, 1981 - porcelaneous foraminifers Status: extant 1 Subclass Miliamminana Mikhalevich, 1980 Period: Carboniferous - Present [358.9 Mya - present]; Status: extant