Cyclostrema spirula

Cyclostrema spirula
	Drawing with two views of a shell of Cyclostrema spirula
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Vetigastropoda
Superfamily:	Trochoidea
Family:	Liotiidae
Genus:	Cyclostrema
Species:	C. spirula
Binomial name
	Cyclostrema spirula; A. Adams, 1850
Synonyms
	Cyclostrema (Daronia) spirula A. Adams, 1850

Cyclostrema spirula is a species of sea snail, a marine gastropod mollusk in the family Liotiidae.[1]

Taxonomy

Examination (Warén & Bouchet 1988) of the holotype of Cyclostrema (Daronia) spirula revealed that it is a land snail belonging to the family Neocyclotidae (synonym: Poteriidae). Furthermore, it is so similar to Buckleyia martinezi (Hidalgo), the type species of this genus, that we do not hesitate to consider it an older synonym of Daronia (synonym: Buckleyia).

Description

The planorbular, white shell is cancellated with elevated, decussating tansverse and longitudinal lines. It is very widely umbilicated. The spire is excavated. The whorls are rapidly increasing, spirally striated, with a sloping, smooth sutural margin. The body whorl becomes disjointed. The large aperture is round and cancellated with the lips. The cancelli are transversely striated. The outer margin of the periphery is crenate.[2][3]

Distribution

This terrestrial species occurs on beaches of the Philippines.

gollark: Ah, makes sense.

gollark: I think I have experienced the wave thing with rarer ones.Also, codes, what?

gollark: How very mysterious.

gollark: So what are these other patterns? Just stuff like "uncommon eggs lying around will get other eggs when taken soonish"?

gollark: There's more to it than biomes and the 5-min/1-hour drops?

References

Bouchet, P. (2013). Cyclostrema spirula A. Adams, 1850. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=580219 on 2013-09-03
G.W. Tryon (1888), Manual of Conchology X; Academy of Natural Sciences, Philadelphia
Arthur Adams (1850) in Proceedings of the Zoological Society of London vol XVIII p. 41, 42

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[WoRMS-1] Bouchet, P. (2013). Cyclostrema spirula A. Adams, 1850. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=580219 on 2013-09-03

[2] G.W. Tryon (1888), Manual of Conchology X; Academy of Natural Sciences, Philadelphia

[3] Arthur Adams (1850) in Proceedings of the Zoological Society of London vol XVIII p. 41, 42