Planorbella magnifica (Pilsbry, 1903)

Magnificent ramshorn



Taxonomy & Nomenclature

Synonym/s: Helisoma magnifica (Pilsbry, 1903)


Conservation Status


IUCN RedList status: Vulnerable



North Carolina, USA


Biology & Ecology










Adams, W. F. and Gerberich, A. G. (1988). Rediscovery of Planorbella magnifica Pilsbry in southeastern North Carolina USA. Nautilus 102: 125-126.

Adams, W. F. and Brady, S. G. (1995). Rediscovery of the aquatic gastropod Helisoma eucosmium (Bartsch, 1908), (Basommatophora: Planorbidae). Brimleyana 22: 23-29.

Baker, F.C. 1945. The Molluscan Family Planorbidae. The University of Illinois Press. Urbana, Illinois.  

Baillie, J. and Groombridge, B. (eds). 1996. 1996 IUCN Red List of Threatened Animals. pp. 378. International Union for Conservation of Nature, Gland, Switzerland and Cambridge, UK.

Bartsch, P. 1908. Notes on the fresh-water mollusk (Planorbis magnificus) and descriptions of two new forms of the same genus from the southern states. Proc. US Nat. Mus. 33: 697-700.

Bogan, A.E. 1996. Planorbella magnifica. The IUCN Red List of Threatened Species 1996: e.T17479A7093789. Downloaded on 25 September 2016.

Bogan, A. E., M. R. Raley and J. F. Levine (2003)  Final report on the taxonomic status of the Greenfield ramshorn, Helisoma eucosmium (Bartsch, 1908) and the magnificent ramshorn, Planorbella magnifica (Pilsbry 1903) (Mollusca, Gastropoda, Planorbidae) from eastern North Carolina.  Unpublished report filed with the US Fish & Wildlife Service, Asheville.  22 pp.

Groombridge, B. (ed.). 1994. 1994 IUCN Red List of Threatened Animals. IUCN, Gland, Switzerland and Cambridge, UK.

Hubendick, B.  (1955)  Phylogeny in the Planorbidae.  Trans. Zool. Soc. London 28: 453-542.

Johnson, P.D., Bogan, A.E., Brown, K.M., Burkhead, N.M., Cordeiro, J.R., Garner, J.T., Hartfield, P.D., Lepitzki, D.A.W., Mackie, G.L., Pip, E., Tarpley, T.A., Tiemann, J.S., Whelan, N.V. and Strong, E.E. 2013. Conservation Status of Freshwater Gastropods of Canada and the United States. Fisheries 38(6): 247-282.

Scientific Council on Freshwater and Terrestrial Mollusks. 1990. (W. F. Adams, Chair) A report on the conservation status of North Carolina’s freshwater and terrestrial molluscan fauna.

Taylor, D. W. (1966)  Summary of North American Blancan nonmarine mollusks.  Malacologia 4: 1 - 172.


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