Pleioptygma helenae is a species of sea snail, a marine gastropod mollusk in the family Pleioptygmatidae.
It is the only known living species in this genus and the only extant species in the family Pleioptygmatidae.Quinn J. F. Jr. (1989). "Pleioptygmatidae, a new family of mitriform gastropods (Prosobranchia: Neogastropoda)". The Nautilus 103(1): 13-19.
Distribution Honduras.Petuch E. J. (1980). "A new Falsilyria (Volutidae) and a new Conus (Conidae) from Roatan Island, Honduras (Atlantic)". The Nautilus 64(3): 115-118.
The type locality is Gorda Bank, Honduras.
Fossil record from Neogene include southeastern USA.
Description The maximum recorded shell length is 123 mm.Welch J. J. (2010). "The "Island Rule" and Deep-Sea Gastropods: Re-Examining the Evidence". PLoS ONE 5(1): e8776. .
The anatomy of the family Pleioptygmatidae is defined according to this the only extant species.
Habitat Minimum recorded depth is 37 m. Maximum recorded depth is 150 m.
References
Further reading
Quinn J. F. Jr. & Lyons W. G. (1984). "A partial description of the anatomy of Pleioptygma helenae (Gastropoda: Neogastropoda)". American Malacological Bulletin 3(1): 97–98.