Granigyra piona is a species of sea snail, a marine gastropod mollusk, unassigned in the superfamily Seguenzioidea.Bouchet, P. (2012). Granigyra piona (Dall, 1919). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=575618 on 26 March 2013Keen M. (1971) Sea shells of tropical West America. Marine mollusks from Baja California to Perú, ed. 2. Stanford University Press. 1064 pp.
Description
The shell grows to a height of 2 mm. Distribution This species occurs in the Pacific Ocean off the Galapagos Islands.
References
External links USNM Invertebrate Zoology Mollusca Collection World Register of Marine Species