Family SCALPELLIDAE Pilsbry, 1907

(nom. transl. Pilsbry, 1916:14 [ex Scalpellinae Pilsbry, 1907: 3, 4])

Amended diagnosis. Scalpellomorphs having a capitulum of no more than 14 plates. Plates deployed in two groups: the upper group formed by paired plates S-L1-T and the lower by unpaired plates R and C with the paired plates RL-L2-CL in between. R is always reduced and sometimes lost, RL is lost in Scalpellopsis, and L2, which ranges from well develop to reduced, is completely lost in Zevinaella .