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Taxonomic reassessment of Planorbis llanerensis from the Neogene of Monagas state, Venezuela (Gastropoda, Planorbidae)
Authors: Salvador, R.B. & Simone, L.R.L.
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In the 1940ís, a fossil freshwater pulmonate was found in an excavation site in Monagas state, Venezuela (Las Piedras/Quiriquire Formation, Pliocene), and was described as Planorbis llanerensis Palmer, 1945. The genus Planorbis M¸ller, 1773, however, is now considered to be Palearctic; all its supposed South American species had their allocation in this genus revised. Thus, here we present a taxonomic reassessment of this species, resulting in the new combination Helisoma llanerensis.