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Discus patulus edentulus Hubricht, 1963
synoniem
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Gepubliceerd in:Hubricht, L. (1963). Notes on the genus Discus. The Nautilus, 77(2): 62–63. https://www.molluscabase.org/aphia.php?p=sourcedetails&id=350369
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Discus patulus f. edentulus Pilsbry, 1948
synoniem
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Gepubliceerd in:Pilsbry, H. A. (1948). Land Mollusca of North America (north of Mexico). Volume II Part 2. The Academy of Natural Sciences of Philadelphia Monographs, 3: i–xlvii, 521–1113. Philadelphia [19 March]. https://www.molluscabase.org/aphia.php?p=sourcedetails&id=296810
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Discus patulus carinatus MacMillan, 1940
synoniem
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Gepubliceerd in:MacMillan, G. K. (1940). Discus patulus angulatus Kutchka. The Nautilus, 53(4): 143. https://www.molluscabase.org/aphia.php?p=sourcedetails&id=350263
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Discus patulus var. brooksi Kutchka, 1938
synoniem
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Gepubliceerd in:Kutchka, G. M. (1938). New varieties of Anguispira and Discus. The Nautilus, 52(1): 11–14, pl. 2. https://www.molluscabase.org/aphia.php?p=sourcedetails&id=349618
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Discus patulus var. angulatus Kutchka, 1938
synoniem
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Gepubliceerd in:Kutchka, G. M. (1938). New varieties of Anguispira and Discus. The Nautilus, 52(1): 11–14, pl. 2. https://www.molluscabase.org/aphia.php?p=sourcedetails&id=349618
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Gonyodiscus bryantwalkeri Pilsbry, 1924
synoniem
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Gepubliceerd in:Pilsbry, H. A. (1924). Some Alleghenian forms of the land-snail genus Gonyodiscus. Proceedings of the Academy of Natural Sciences of Philadelphia, 76: 417–421. https://www.molluscabase.org/aphia.php?p=sourcedetails&id=350116
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Helix patula Deshayes, 1832
synoniem
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Gepubliceerd in:Deshayes, G. P. (1830). Encyclopédie méthodique ou par ordre de matières. Histoire naturelle des Vers et Mollusques. Vol. 2: viii+1-594 [part 1: i-vi, 1-256, Livraison 101, 1 Feb 1830; part 2: 1-144, Livraison 101, 1 Feb. 1830; 145-594, Livraison 102, 29 Sept. 1832]. Vol. 3: 595-1152 [Livraison 102, 29 Sept. 1832]. Agasse, Paris, pp. 595–1152. https://doi.org/10.5962/bhl.title.8638
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Pyramidula perspectiva (Say, 1817)
synoniem
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Helix perspectiva Say, 1817
heterotypic synonym
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Gepubliceerd in:Say, T. (1817). Descriptions of seven species of American fresh water and land shells, not noticed in the systems. Journal of the Academy of Natural Sciences, Philadelphia 1(1): 13–16, 17–18. https://www.molluscabase.org/aphia.php?p=sourcedetails&id=331494
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