Monostiolum nocturnum is a species of sea snail, a marine gastropod mollusc in the family Pisaniidae.
Distribution This marine species occurs in the Caribbean Sea off Tobago.
References
External links Watters, G. T. (2009). A revision of the western Atlantic Ocean genera Anna, Antillophos, Bailya, Caducifer, Monostiolum, and Parviphos, with description of a new genus, Dianthiphos, and notes on Engina and Hesperisternia Gastropoda: Buccinidae: Pisaniinae) and Cumia (Colubrariidae). The Nautilus. 123(4): 225–275