Mexican Rams-horn

Planorbella est un genre de mollusques gastéropodes d'eau douce à la coquille aplatie et pourvus de poumons. Liste des espèces Planorbella ammon (Gould, 1855) Planorbella binneyi (Tryon, 1867) Planorbella campanulata (Say, 1821) Planorbella columbiensis (F. C.

Planorbella is a genus of freshwater air-breathing snails, aquatic pulmonate gastropod mollusks in the family Planorbidae, the ram's horn snails, or planorbids, which all have sinistral, or left-coiling, shells. The Planorbella genus is not known to be colonial but are very plentiful and occur in large groupings. This genus is commonly found within North America, and is also found within various countries in Europe, including Iceland, Spain, Germany, France, Ukraine, and others.

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