Family INVOLUTINIDAE Bütschli, 1880
Involutinidae Sigal, in Piveteau, 1952 (*2413), p. 159, nom. transl. ex subfamily Involutinae.
Trocholinidae Kristan-Tollmann. 1963 (*1738), p. 150. Pseudovidalinidae Altiner, 1986 (*28A), p. 25.
Test consisting of proloculus and undivided tubular chamber that is planispirally to trochospirally coiled; may have additional shell material deposited at one or both sides of the test as thickening or nodes. L. Permian to U. Cretaceous (Cenomanian).