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Pulmonata

From Wikipedia, the free encyclopedia

Pulmonata
Temporal range:Carboniferous–recent
Various examples of Pulmonata
Scientific classificationEdit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Informal group: Pulmonata
Cuvier,1814
Taxonomic subdivisions

Pulmonataorpulmonatesis an informal group (previously anorder,and before that, asubclass) ofsnailsandslugscharacterized by the ability to breathe air, by virtue of having apallial lunginstead of agill,or gills. The group includes many land and freshwater families, and several marine families.

ThetaxonPulmonata as traditionally defined was found to bepolyphyleticin a molecular study per Jörgeret al.,dating from 2010.[1]

Pulmonata are known from theCarboniferousperiod to the present.[2]

Pulmonates have a singleatriumand kidney, and a concentrated symmetrical nervous system. The mantle cavity is on the right side of the body, and lacks gills, instead being converted into avascularisedlung. Most species have a shell, but nooperculum,although the group does also include several shell-less slugs. Pulmonates arehermaphroditic,and some groups possesslove darts.[3]

Linnean taxonomy

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The taxonomy of this group according to thetaxonomy of the Gastropoda (Ponder & Lindberg, 1997)was as follows:

OrderPulmonataCuvierin Blainville, 1814 - pulmonates

Shells of pulmonatestylommatophoransnails in a museum collection
An artistic but scientifically incorrect version of various European land snails and slugs (one species here is not a pulmonate), their food plants and fungi, and a beetle that eats mollusks, bottom right.

2005 taxonomy

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Examples of Pulmonata:Achatina fulicatop right,Bielzia coerulanstop left,Praticolella berlandierianacenter right,Megalobulimus oblongusin the center,Euglandina roseacenter left,Helix pomatiabottom right &Ashmunella levetteibottom left

The taxonomy of this group according to thetaxonomy of the Gastropoda (Bouchet & Rocroi, 2005)[4]was as follows:

Informal Group Pulmonata

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Contains the informal groupBasommatophoraand the cladeEupulmonata

Informal Group Basommatophora

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Contains the cladeHygrophila

Clade Eupulmonata

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Contains the cladesSystellommatophoraandStylommatophora

Contains the subcladesElasmognatha,Orthurethraand the informal groupSigmurethra

SubcladeOrthurethra
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Informal GroupSigmurethra
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other Sigmurethra
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Two superfamilies belongs to clade Sigmurethra, but they are not in the limacoid clade.

2010 taxonomy

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Jörgeret al.(2010)[1]analyzed major groups within theHeterobranchiausing genetic data and found that Pulmonata as traditionally defined waspolyphyletic,for instance some pulmonates were more closely related toSacoglossaandAcochlidia.They proposed the more inclusive taxonPanpulmonatato unite the cladesSiphonarioidea,Sacoglossa,Glacidorboidea,Pyramidelloidea,Amphiboloidea,Hygrophila,AcochlidiaandEupulmonata.[1]

References

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  1. ^abcJörger, Katharina M; Stöger, Isabella; Kano, Yasunori; Fukuda, Hiroshi; Knebelsberger, Thomas; Schrödl, Michael (2010)."On the origin of Acochlidia and other enigmatic euthyneuran gastropods, with implications for the systematics of Heterobranchia".BMC Evolutionary Biology.10(1): 323.Bibcode:2010BMCEE..10..323J.doi:10.1186/1471-2148-10-323.PMC3087543.PMID20973994.
  2. ^(in Czech) Pek I., Vašíček Z., Roček Z., Hajn. V. & Mikuláš R. 1996.Základy zoopaleontologie.Olomouc, 264 pp.,ISBN80-7067-599-3.
  3. ^Barnes, Robert D. (1982).Invertebrate Zoology.Philadelphia, PA: Holt-Saunders International. p. 377.ISBN0-03-056747-5.
  4. ^Bouchet, Philippe;Rocroi, Jean-Pierre;Frýda, Jiri; Hausdorf, Bernard;Ponder, Winston;Valdés, Ángel & Warén, Anders (2005). "Classification and nomenclator of gastropod families".Malacologia.47(1–2). Hackenheim, Germany: ConchBooks: 1–397.ISBN3-925919-72-4.ISSN0076-2997.

Further reading

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