| 词条 | Vallonia costata |
| 释义 |
| image = Vallonia costata apical.jpg | image_caption = Apical view of a shell of Vallonia costata | image2 = Vallonia costata basal.jpg | image2_caption = Basal view of a shell of Vallonia costata | regnum = Animalia | phylum = Mollusca | classis = Gastropoda | unranked_superfamilia = clade Heterobranchia clade Euthyneura clade Eupulmonata clade Stylommatophora informal group Orthurethra | superfamilia = Pupilloidea | familia = Valloniidae | subfamilia = | genus = Vallonia | species = V. costata | binomial = Vallonia costata | binomial_authority = (O. F. Müller, 1774)[1] | synonyms = }}Vallonia costata is a species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Valloniidae.[2] DescriptionFor terms see gastropod shell The 1.1-1.6 x 2.2-2.7 mm. shell has 3.2-3.3 whorls. Whorls are slightly angular at the periphery with deep sutures. The shell is flat with regular and widely spaced ribs. The shell is striated between the ribs, the last whorl is descending. The almost circular aperture is oblique (inclined downwards) and in adult specimens broadly reflected.The lip is thickened and reflected. Like other Vallonia the umbilicus is very wide. The shell is ivory-white. For differences from Vallonia pulchella see that species. DistributionThis species occurs in countries and islands including:
References1. ^Müller O. F. 1774. Vermivm terrestrium et fluviatilium, seu animalium infusoriorum, helminthicorum, et testaceorum, non marinorum, succincta historia. Volumen alterum. pp. I-XXVI [= 1-36], 1-214, [1-10]. Havniæ & Lipsiæ. (Heineck & Faber). 2. ^v 3. ^1 {{cs icon}} Horsák M., Juřičková L., Beran L., Čejka T. & Dvořák L. (2010). "Komentovaný seznam měkkýšů zjištěných ve volné přírodě České a Slovenské republiky. [Annotated list of mollusc species recorded outdoors in the Czech and Slovak Republics]". Malacologica Bohemoslovaca, Suppl. 1: 1-37. PDF. 4. ^Balashov I. & Gural-Sverlova N. 2012. An annotated checklist of the terrestrial molluscs of Ukraine. Journal of Conchology. 41 (1): 91-109.
External links
2 : Valloniidae|Molluscs described in 1774 |
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