| 词条 | Vallonia pulchella |
| 释义 |
| image = Vallonia pulchella.jpg | image_caption = A live individual of Vallonia pulchella | 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. pulchella | binomial = Vallonia pulchella | binomial_authority = (O. F. Müller, 1774)[1] | synonyms =
}} Vallonia pulchella, common name the lovely vallonia, is a species of very small air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Valloniidae. DescriptionFor terms see gastropod shell The shell is circular in outline, with 3.2 - 3.3 whorls. The last whorl is wider immediately before the aperture, and is not much descending. Compared to Vallonia costata, the aperture is not very oblique, and the lip is weaker than in that species. Vallonia pulchella also has slightly more elevated whorls than Vallonia costata. Like other Vallonia species, the umbilicus is very wide. The shell is ivory-white with very fine and irregular streaks. The soft parts are milky white. The tentacles are short, and the posterior end of the foot is round. DistributionThis species occurs in countries and islands including: Europe:
America:
Life habitsThe size of the egg is 0.5 mm.[8] In this species some parental care was observed: apparently the eggs were cleaned of fungi.[8] Parental care is very rare in gastropods in general and has otherwise been observed only in the genus Libera. In North America it is commonly found in woodlands and suburban gardens. It lives in moist soil and may be attracted to decaying material. 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. ^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. 3. ^Balashov I. & Gural-Sverlova N. 2012. An annotated checklist of the terrestrial molluscs of Ukraine. Journal of Conchology. 41 (1): 91-109. 4. ^Vallonia pulchella (O. F. Müller 1774) - Glatte Grasschnecke. Accessed 26 April 2009. 5. ^Vallonia pulchella. Stichting ANEMOON, Accessed 26 April 2009. 6. ^Robert G. Forsyth. Terrestrial Gastropods of the Columbia Basin, British Columbia Family Valloniidae. Accessed 25 April 2009. 7. ^Coppolino M.L. 2009. Land Snails of Southern Illinois. Southern Illinois University, Carbondale, Illinois, USA. Last updated 31 January 2009, accessed 25 April 2009. 8. ^1 Heller J.: Life History Strategies. in Barker G. M. (ed.): [https://books.google.com/books?id=WlvX-9Wt0toC&hl The biology of terrestrial molluscs]. CABI Publishing, Oxon, UK, 2001, {{ISBN|0-85199-318-4}}. 1-146, cited pages: 419-420 and page 426. External links{{Commonscat}}
2 : Valloniidae|Molluscs described in 1774 |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。