Paraschwagerininae Bensh

Subfamily PARASCHWAGERININAE Bensh in Rauzer-Chernousova et al., 1996 Test small to large, short pseudofusiform and elongated fusiform, often very elongated and flattened; the spiral is tight in the juvenarium, loose in the outer whorls with a jump in expansion at the beginning of the adult stage. Wall thin, weakly and gradually thickening; septa thin, weakly to strongly folded in the juvenile stage, strong but irregularly folded in the adult stage, in sections with wide and narrow, low and high, often loop-shaped multi-tiered arches, sometimes randomly placed; Phrenothecae are represented; secondary deposits in the form of unstable and intermittent axial fillings, and weak chomata in the juvenarium or only in the first chambers; the aperture is indistinct. Composition: Paraschwagerina Dunbar & Skinner, 1936; Acervoschwagerina Hanzawa, 1949; Klamathina Skinner & Wilde, 1965.