Provanna ios is a species of deep-sea sea snail, a marine gastropod mollusk in the family Provannidae.
Distribution This species occurs in East Pacific hydrothermal vents at the Galapagos Rift.
References
Warén A. & Bouchet P. (2001). Gastropoda and Monoplacophora from hydrothermal vents and seeps new taxa and records. The Veliger 44(2): 116–231