Profusulinellidae Solovieva

Family PROFUSULINELLIDAE Solovieva in Rauzer-Chernousova et al., 1996 Test usually small, subspherical to moderately elongated and ovoid, fusiform and subrhomboid, in the first whorls usually narrow-nautiloid or subspherical; in the first whorls sometimes endothyroid; wall three-layered (tectum, primatheca and external tectorium), less often two-layered without external tectorium or with a clear layer in the upper part of the primatheca (type of rudimentary diaphanotheca); septa weakly to moderately curled at axial ends. Chomata are clear, less often weak, round in cross-section, symmetrical or asymmetrical, flattening towards the poles, subquadratic or ribbon-shaped; additional deposits are sometimes present in the form of a thickening of the outer tectorium; significant deposits are possible in the axial region; the aperture is usually narrow to moderate. Late Bashkirian-Moscovian. Composition: Profusulinella Rauzer-Chernousova & Belyaev in Rauzer-Chernousova et al., 1936; Depratina Solovieva in Rauzer-Chernousova et al., 1996; Moellerites Solovieva, 1986; Shachella Zhu, 1995; Solovievaia Vachard & Le Coze, 2018; Staffellaeformes Solovieva, 1986; Taitzehoella Sheng, 1951.