Potamolithus Microthauma

''Potamolithus'' is a genus of small freshwater snails that have an operculum, aquatic gastropod mollusks in the family Tateidae.Davis G. M. & Pons da Silva M. C. (1984). "''Potamolithus'': morphology, convergence, and relationships among hydrobioid snails". '' Malacologia'' 25
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108.Bouchet, P. (2014). Potamolithus Pilsbry, 1896. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=724574 on 2014-07-29

''Potamolithus'' was traditionally classified within the Hydrobiidae. However, anatomical study of ''Potamolithus'' by Davis & Pons da Silva (1984) showed its relationship with ''Lithoglyphus'', and it is then placed within the family Lithoglyphidae.

The first appearance of the name ''Potamolithus'' was in November 1896 as a nomen nudum (a bare name with no description or illustration).Lopez Armengol M. F. & Mancefiido M. O. (1992). "Case 2801. ''Potamolithus'' Pilsbry, 1896 (Mollusca, Gastropoda): proposed confirmation of ''P. rushii'' Pilsbry, 1896 as the type species". '' Bulletin of Zoological Nomenclature'' 49(2)
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The genus was formally defined by Pilsbry in December 1896.

Distribution

''Potamolithus'' is the only genus of the family Tateidae in South America. Distribution of ''Potamolithus'' includes Argentina (22 species, 11 species are endemic to Argentina),Rumi A., Gregoric D. E. G., Núñez V. & Darrigran G. A. (2008). "Malacología Latinoamericana. Moluscos de agua dulce de Argentina". '' Revista de Biología Tropical'' 56(1): 77-111
HTM
Uruguay (17 species) Scarabino F. (2004). "Lista sistemática de los Gastropoda dulciacuícolas vivientes de Uruguay". ''Comunicaciones de la Sociedad Malacológica del Uruguay'' 8(84–85/86–87): 347-355
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. and Brazil. ''Potamolithus'' is the largest genus (i.e. the one with the highest species richness) of recent freshwater snails in Argentina and in Uruguay.

Species

Species within the genus ''Potamolithus'' include:
* ''Potamolithus agapetus'' Pilsbry, 1911Rumi A., Gregoric D. E. G., Núñez V., César I. I., Roche M. A., Tassara M. P., Martín S. M. & Armengol M. F. L. (2006). "Freshwater Gastropoda from Argentina: Species Richness, Distribution Patterns, and an Evaluation of Endangered Species". '' Malacologia'' 49(1): 189-208.
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Pilsbry H. A. (1911). "Non-marine Mollusca of Patagonia". In: Scott W. B. (ed.) ''Reports of the Princeton University Expedition to Patagonia 1896–1899'' 3
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633. ''Potamolithus'' is on page
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602, plate
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41.Gregoric D. E. G., Núñez V., Rumi A. & Roche M. A. (2006). "Freshwater gastropods from del Plata basin, Argentina. Checklist and new locality records". ''Comunicaciones de la Sociedad Malacológica del Uruguay'' 9(89): 51-60
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* ''Potamolithus bushii'' (Frauenfeld, 1865)
* ''Potamolithus callosus'' Pilsbry, 1925
* ''Potamolithus carinifer'' Pilsbry, 1911
* ''Potamolithus catharinae'' Pilsbry, 1911
* ''Potamolithus concordianus'' Parodiz, 1966
* ''Potamolithus conicus'' (Brot, 1867)
* ''Potamolithus dinochilus'' Pilsbry, 1896
* ''Potamolithus doeringi'' Pilsbry, 1911
* ''Potamolithus felipponei'' Ihering, 1910
* ''Potamolithus hidalgoi'' Pilsbry, 1896 - synonyms: ''Potamolithus microthauma'' Pilsbry, 1896; ''Potamolithus dinochilus'' Pilsbry, 1896; ''Potamolithus hatcheri'' Pilsbry, 1911
* ''Potamolithus iheringi'' Pilsbry, 1896
* ''Potamolithus karsticus'' Simone & Moracchioli, 1994
* ''Potamolithus lapidum'' (d'Orbigny, 1835) - synonyms: ''Potamolithus lapidum supersulcatus'' Pilsbry, 1896; ''Potamolithus paysanduanus'' Ihering, 1910; ''Potamolithus lapidum'' var. ''elatior'' Pilsbry, 1911; ''Potamolithus callosus'' Pilsbry, 1926
* '' Potamolithus microthauma'' Pilsbry, 1896
* ''Potamolithus orbignyi'' Pilsbry, 1896
* ''Potamolithus paranensis'' Pilsbry, 1911
* ''Potamolithus peristomatus'' (d'Orbigny, 1835)
* ''Potamolithus petitianus'' (d'Orbigny, 1840)
** ''Potamolithus petitianus sykesii'' Pilsbry, 1896 - synonyms: ''Potamolithus bisinuatus bisinuatus'' Pilsbry, 1896; ''Potamolithus bisinuatus obsoletus'' Pilsbry, 1896; ''Potamolithus gracilis gracilis'' Pilsbry, 1896; ''Potamolithus gracilis viridis'' Pilsbry, 1896
* ''Potamolithus philipianus'' Pilsbry, 1911
* ''Potamolithus quadratus'' Pilsbry & Ihering, 1911
* ''Potamolithus rushii'' Pilsbry, 1896 - type genus
* ''Potamolithus ribeirensis'' Pilsbry, 1911Bichuette M. E. & Trajano E. (2003). "A population study of epigean and subterranean ''Potamolithus'' snails from southeast Brazil (Mollusca: Gastropoda: Hydrobiidae)". ''Hydrobiologia'' 505: 107-117
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* ''Potamolithus simplex'' Pilsbry, 1911
* ''Potamolithus tricostatus'' (Brot, 1867)
* ''Potamolithus troglobius'' Simone & Moracchioli, 1994
* ''Potamolithus valchetensis'' Miquel, 1998

Ecology

''Potamolithus'' species live in streams. Some species are subterranean, living in caves (for example ''Potamolithus troglobius'' and ''Potamolithus karsticus'').

References

Further reading

* Bichuette M. E. (1998). "Distribuição e biologia de gastrópodes de água doce, gênero ''Potamolithus'', no Vale do Alto Ribeira, São Paulo (Mollusca: Gastropoda: Hydrobiidae)". M. Sc. Thesis – Instituto de Biociências, Universidade de São Paulo, São Paulo, Brasil. 127 pp.
* López Armengol M. F. (1985). "Estudio sistemaco y bioecológico del género ''Potamolithus'' (Hydrobiidae) utilizando técnicas de taxonomía numérica Tesis Doctoral (N°. 455)". Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata.
* López Armengol M. F. & Darrigran G. (1998). "Distribución del género neotropical ''Potamolithus'' Pilsbry & Rush, 1896 (Gastropoda: Hydrobiidae) en el estuario del Río de la Plata". ''Iberus'' 16: 267-274.
* Parodiz J. J. (1965). "Relaciones y evidencias paleontológicas de ''Potamolithus''". ''Comunicaciones de la Sociedad Malacológica del Uruguay'' 1: 273-278.

External links

{{Taxonbar, from=Q7234645

Tateidae