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Pupilla pratensis : ウィキペディア英語版 | Pupilla pratensis
''Pupilla pratensis'' is a species of minute air-breathing land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Pupillidae. This taxon was elevated to species level in 2009.〔von Proschwitz T., Schander C. , Jueg U. & Thorkildsen S. (2009). "Morphology, ecology and DNA-barcoding distinguish ''Pupilla pratensis'' (Clessin, 1871) from ''Pupilla muscorum'' (Linnaeus, 1758) (Pulmonata: Pupillidae)". ''Journal of Molluscan Studies'' 75(4): 315-322. .〕 == Taxonomy == ''Pupilla pratensis'' was originally described as a variety of ''Pupilla muscorum'' by German malacologist Stefan Clessin in 1871.〔 The taxon ''Pupilla pratensis'' has long been neglected in the malacological literature, or considered a morphologically weakly defined ecophenotype – found in wet, calcareous habitats – of the variable ''Pupilla muscorum''.〔〔 The form, however, represents a distinct species, which has recently been shown in a study combining morphological, ecological and molecular data by von Proschwitz et al. (2007, 2009).〔von Proschwitz T., Schander C., Jueg U. & Thorkildsen S. (2007). "''Pupilla pratensis'' (Clessin, 1871) a distinct species in the form group of ''Pupilla muscorum'' (Linnaeus, 1758) (Gastropoda, Pulmonata, Pupillidae)". In: Jordanes K., Van Houtte N., Van Goethem J. & Backeljau T. (eds). World Congress of Malacology Antwerp, Belgium 15-20 July 2007. Abstracts. pp. 235-236.〕〔〔 ''Pupilla pratensis'' was misidentified as either ''Pupilla muscorum''〔 or ''Pupilla alpicola'' before 2009.〔 However, based on some 2012 preliminary molecular analyses, it seems that ''Pupilla pratensis'' and ''Pupilla alpicola'' are geographical subspecies of a single, more widely distributed species.〔
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