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Pomacea Columellaris
''Pomacea columellaris'' is a South American species of freshwater snail in the apple snail family, ''Ampullariidae''. Taxonomy ''Pomacea columellaris'' was originally described as ''Ampullaria columellaris'' by Augustus Addison Gould in 1848, based on a holotype shell collected during the United States Exploring Expedition from 1838-1842. They were named for their notable columella, comparable to those of ''Helix'' land snails. In 1904, Dall proposed a section or subgenus of '' Ampullaria'' (later treated as synonymous with ''Pomacea'') called '' Limnopomus'', with ''A. columellaris'' as the type species. After 1991, ''Limnopomus'' was also considered synonymous with ''Pomacea''. Shell description The species has a heavy, oval shell with a sharp spire. Its operculum is corneous and able to retract inside the shell's aperture. They lack an umbilicus and are often yellow in color. Distribution ''P. columellaris'' is found in rivers in the highlands of Venezuela, Colombia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South American
South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the southern subregion of a single continent called America. South America is bordered on the west by the Pacific Ocean and on the north and east by the Atlantic Ocean; North America and the Caribbean Sea lie to the northwest. The continent generally includes twelve sovereign states: Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay, Peru, Suriname, Uruguay, and Venezuela; two dependent territories: the Falkland Islands and South Georgia and the South Sandwich Islands; and one internal territory: French Guiana. In addition, the ABC islands of the Kingdom of the Netherlands, Ascension Island (dependency of Saint Helena, Ascension and Tristan da Cunha, a British Overseas Territory), Bouvet Island ( dependency of Norway), Panama ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
