Pleioptygma helenae

Pleioptygma helenae Temporal range: Neogene–Recent [1] PreꞒ Ꞓ O S D C P T J K Pg N
shell of Pleioptygma helenae
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Caenogastropoda clade Hypsogastropoda clade Neogastropoda
Superfamily:	Muricoidea
Family:	Pleioptygmatidae
Genus:	Pleioptygma
Species:	P. helenae
Binomial name
Pleioptygma helenae (Radwin & Bibbey, 1972) [2]

Pleioptygma helenae is a species of sea snail, a marine gastropod mollusk in the family Pleioptygmatidae. ^[3]

It is the only known living species in this genus and the only extant species in the family Pleioptygmatidae. ^[1]

Distribution

Honduras. ^[4]

The type locality is Gorda Bank, Honduras. ^[1]

Fossil record from Neogene include southeastern USA. ^[1]

apertural view of the shell of Pleioptygma helenae

Description

The maximum recorded shell length is 123 mm. ^[5]

Main article: Pleioptygma § Description

The anatomy of the family Pleioptygmatidae is defined according to this the only extant species.

Habitat

Minimum recorded depth is 37 m. ^[5] Maximum recorded depth is 150 m. ^[5]

References

1. Quinn J. F. Jr. (1989). "Pleioptygmatidae, a new family of mitriform gastropods (Prosobranchia: Neogastropoda)". The Nautilus 103(1): 13-19.
2. Radwin G. E. & Bibbey L. J. (1972). "A new mitrid from the western Atlantic". Transactions of the San Diego Society of Natural History 17(7): 95-99.
3. Pleioptygma helenae (Radwin & Bibbey, 1972) . Retrieved through: World Register of Marine Species  on 04/24/10.
4. Petuch E. J. (1980). "A new Falsilyria (Volutidae) and a new Conus (Conidae) from Roatan Island, Honduras (Atlantic)". The Nautilus 64(3): 115-118.
5. Welch J. J. (2010). "The "Island Rule" and Deep-Sea Gastropods: Re-Examining the Evidence". PLoS ONE 5(1): e8776. doi : 10.1371/journal.pone.0008776 .

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.