| 词条 | Discus rotundatus |
| 释义 |
| image = Discus_rotundatus.jpg | image_caption = A live Discus rotundatus | status = | regnum = Animalia | phylum = Mollusca | classis = Gastropoda | unranked_superfamilia = clade Heterobranchia clade Euthyneura clade Eupulmonata clade Stylommatophora informal group Sigmurethra | superfamilia = Punctoidea | familia = Discidae | genus = Discus | subgenus = Gonyodiscus | subgenus_authority = Fitzinger, 1833 | species = D. rotundatus | binomial = Discus rotundatus | binomial_authority = (O. F. Müller, 1774)[1] | synonyms =
}} Discus rotundatus, common name rotund disc, is a species of small, air-breathing, land snail, a terrestrial pulmonate gastropod mollusk in the family Discidae, the disk snails. DescriptionThe shells of Discus rotundatus in the adult stage measure {{convert|5.7|-|7|mm}} in diameter and {{convert|2.4|-|6|mm}} in height.[3] Shells are reddish brown with darker cross bands, flat and densely ribbed. The umbilicus is quite wide, reaching about 1/3 of the shell diameter.[3] Among the species of Discus in Europe and North America, Discus rotundatus is recognized by the alternating pattern of reddish brown spots, tight coiling of the whorls and broad and shallow umbilicus. The body of this gastropod is bluish black on the upperside, while the lower side is greyish white. They mainly feed on plant debris, humus, algae and fungi.[3] Cycle of lifeDistributionThis species lives in Western and Central Europe. It is found in the Czech Republic, Poland, Ukraine[5] and Slovakia. It is also found in Great Britain, Ireland, France, Italy, southern Scandinavia, and other countries.[6] Its range includes Turkey.[7] The species has been introduced to North America where it was first found in 1937 and now is known from six Canadian provinces (British Columbia, Ontario, Quebec, New Brunswick, Nova Scotia, and Newfoundland and Labrador) and 16 states, as well as the District of Columbia, in the United States.[8] It does not appear to have the capability to become an invasive pest species in North America, as it lives in leaf litter and forms colonies where the individuals do not tend to spread widely. HabitatThese gastropods live in forests and humid shady places, in dead wood logs, under stones, on humus and in soil litter, sometimes in colonies, at an elevation of {{convert|0|-|2100|m}} above sea level.[3] They can live both in natural habitats and in environments modified by humans, like gardens.[9] The species can tolerate substrate which is non-calcareous.[10] Subspecies
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. ^[https://www.biolib.cz/en/taxon/id2803/ Biolib] 3. ^1 2 3 4 AnimalBase 4. ^{{Citation| last1 = Davison | first1 = A. | last2 = Wade | first2 = C.M. | last3= Mordan | first3=P.B. | last4=Chiba |first4 = S. |title = Sex and darts in slugs and snails (Mollusca: Gastropoda: Stylommatophora)| journal = Journal of Zoology| volume = 267 |issue = 4 | year = 2005| pages = 329–338| url = http://www.nottingham.ac.uk/~plzad/sex_darts.pdf | doi=10.1017/s0952836905007648}} 5. ^Balashov I. & Gural-Sverlova N. 2012. An annotated checklist of the terrestrial molluscs of Ukraine. Journal of Conchology. 41 (1): 91-109. 6. ^1 Fauna Europae 7. ^Örstan, A. 2003. The first record of Discus rotundatus from Turkey. Triton, No. 7, p. 27. {{cite web|url=http://home.earthlink.net/~aydinslibrary/DRotundatusTRtriton.pdf |title=Archived copy |accessdate=2008-08-26 |deadurl=yes |archiveurl=https://web.archive.org/web/20080511144945/http://www.home.earthlink.net/~aydinslibrary/DRotundatusTRtriton.pdf |archivedate=2008-05-11 |df= }} 8. ^{{Citation| last1 = Forsyth | first1 = R.G. | last2 = Maunder |first2 = J.E. | last3 = McAlpine | first3 = D.F. | last4 = Noseworthy | first4 = R.G. | title = Distributional Status of an Introduced Land Snail Discus rotundatus (Rotund Disc, Mollusca: Discidae) in Canada | journal = The Canadian Field-Naturalist | volume = 130 | issue = 3 | year = 2016 | pages = 236–247 | url = http://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/1887/1830 }} 9. ^Wiese, V. 2014. Die Landschnecken Deutschlands: Finden - Erkennen - Bestimmen. Quelle & Meyer: Wiebelsheim. 10. ^Welter-Schultes, F.W. 2012. European non-marine molluscs, a guide for species identification: Bestimmungsbuch für europäische Land- und Süsswassermollusken. Planet Poster Editions:Göttingen. 11. ^Fauna Europae : Discus rotundatus rotundatus
2 : Discidae|Molluscs described in 1774 |
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