| 词条 | Cyclostrema spirula |
| 释义 |
| name = Cyclostrema spirula | image = Cyclostrema spirula 001.jpg | image_caption = Drawing with two views of a shell of Cyclostrema spirula | regnum = Animalia | phylum = Mollusca | classis = Gastropoda | unranked_superfamilia = clade Vetigastropoda | superfamilia = Trochoidea | familia = Liotiidae | genus = Cyclostrema | subgenus = | species = C. spirula | binomial = Cyclostrema spirula | binomial_authority = A. Adams, 1850 | synonyms_ref = | synonyms = Cyclostrema (Daronia) spirula A. Adams, 1850 }}Cyclostrema spirula is a species of sea snail, a marine gastropod mollusk in the family Liotiidae.[1] TaxonomyExamination (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). DescriptionThe 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] DistributionThis terrestrial species occurs on beaches of the Philippines. References1. ^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 {{Taxonbar|from=Q13507601}}{{DEFAULTSORT:Cyclostrema Spirula}}2. ^[https://www.biodiversitylibrary.org/item/77914 G.W. Tryon (1888), Manual of Conchology X; Academy of Natural Sciences, Philadelphia] 3. ^[https://archive.org/stream/lietuvostsrmoksl50liet#page/n68/mode/1up Arthur Adams (1850) in Proceedings of the Zoological Society of London vol XVIII p. 41, 42] 2 : Cyclostrema|Gastropods described in 1850 |
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