Monostiolum

Monostiolum is a genus of sea snails, marine gastropod mollusks in the family Pisaniidae.

Species
Species within the genus Monostiolum include:
 * Monostiolum atlanticum (Coelho, Matthews & Cardoso, 1970)
 * Monostiolum auratum Watters & Finlay, 1989
 * Monostiolum crebristriatus (Carpenter, 1856)
 * Monostiolum fumosum Watters, 2009
 * Monostiolum harryleei Garcia, 2006
 * Monostiolum nigricostatum (Reeve, 1846)
 * Monostiolum nocturnum Watters, 2009
 * Monostiolum pictum (Reeve, 1844)
 * Monostiolum rosewateri Watters & Finlay, 1989
 * Monostiolum simonei Watters, 2016
 * Monostiolum tessellatum (Reeve, 1844)
 * Species brought into synonymy:
 * Monostiolum weberi (Watters, 1983): synonym of Bailya weberi (Watters, 1983)