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Planaria is a genus of planarians in the family Planariidae. Due to its excellent ability to regenerate, species of Planaria has also been used as model organisms in regeneration studies. [ 1 ] When an individual is cut into pieces, each piece has the ability to regenerate into a fully formed individual. [ 2 ]
Unidentified planarian. Planarians (triclads) are free-living flatworms of the class Turbellaria, [2] [3] order Tricladida, [4] which includes hundreds of species, found in freshwater, marine, and terrestrial habitats. [5]
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During most of the 20th century, many new land planarian species, mostly from Australia and South America, were placed in Geoplana. In 1955, Eudóxia Maria Froehlich defined that Geoplana vaginuloides would be the type-species of Geoplana, as it was the first species listed by Stimpson. [3]
Planaria torva is a species of planarian in the family Planariidae. [1] When an individual is cut into pieces, each piece has the ability to regenerate into a fully formed individual. [ 2 ]
Planaria simplissima Curtis, 1900 Cura foremanii is a species of freshwater planarian belonging to the family Dugesiidae . [ 1 ] [ 2 ] It is found in freshwater habitats within North America .
The complete mitogenome of Caenoplana coerulea is 18,621 bp in length. [7] Its main characteristic is a cytochrome c oxidase subunit 2 gene of unusual length, with a cox2 encoded protein 505 aa in length (compared to about 250 aa in other geoplanids); this characteristic of a very long cox2 is also found in other members of the subfamily Rhynchodeminae, to which Caenoplana coerulea belongs.
Planaria vaginuloides Darwin, 1844 Geoplana vaginuloides is a species of land planarian belonging to the subfamily Geoplaninae . [ 1 ] It is found in areas within the Atlantic Forest in the municipalities of Rio de Janeiro and Teresópolis , Brazil .