Uncancylus concentricus (Mollusca, Gastropoda, Ancylidae): new occurrence in state of Rio de Janeiro, Brazil

Abstract

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A New Species of Uncancylus Pilsbry, 1913 (Gastropoda: Hygrophila: Planorboidea: Ancylinae), from South America and Reassessment of the Status of U. bonariensis Strobel, 1874

“…Morphological identification of Uncancylus concentricus was carried out based on the original descriptions and additional literature (Hubendick, 1964, 1978; Ohlweiler & Lanzer, 1993; Lanzer, 1996; Santos, 2003; Santos et al, 2009; Ovando et al, 2014). The redescription of U. bonariensis and description of the new species were based on shell morphologies and soft parts.…”

“…This species has been recorded in Central and South America from Costa Rica (Hubendick, 1964(Hubendick, , 1967Pilsbry, 1920;Lanzer & Veitenheimer-Mendes, 1985;Lanzer, 1996) to southern Buenos Aires, Argentina (Santos, 2003;Santos et al, 2009;Martin & Diaz, 2012;Ovando et al, 2014). Details of its morphology and microsculpture have been documented by numerous authors (Hubendick, 1964(Hubendick, , 1967Lanzer, 1995Lanzer, , 1996Santos et al, 2009;Ovando et al, 2014). Strobel (1874) established a "variety" of Ancylus concentricus from southern Buenos Aires, Argentina, called bonariensis, based on shell size and the absence of radial sculpture on the anterior side.…”

“…Uncancylus concentricus is probably the best known of all described species of Uncancylus, both in terms of morphology and distribution. This species has been recorded in Central and South America from Costa Rica (Hubendick, 1964, 1967; Pilsbry, 1920; Lanzer & Veitenheimer-Mendes, 1985; Lanzer, 1996) to southern Buenos Aires, Argentina (Santos, 2003; Santos et al, 2009; Martin & Diaz, 2012; Ovando et al, 2014). Details of its morphology and microsculpture have been documented by numerous authors (Hubendick, 1964, 1967; Lanzer, 1995, 1996; Santos et al, 2009; Ovando et al, 2014).…”

“…Based on radula and shell morphology, Hubendick (1967) considered Uncancylus as a synonym of Gundlachia Pfeiffer, 1849, and many South American authors followed this proposal (Cazzaniga, 1985;Lanzer & Veitenheimer-Mendes, 1985;Lanzer, 1996). It is currently considered to be a genus of Ancylinae, with numerous records in South America (Santos, 2003;Santos et al, 2009;Ovando et al, 2014). Pilsbry (1913) established Uncancylus as a subgenus of Gundlachia and designated Ancylus barilensis Moricand, 1845 (now a junior synonym of U. concentricus), as its type species.…”

The introduction of Physa acuta (Gastropoda: Physidae) on Ilha Grande, Southeast Brazil, from initial stages to an established population

“…Despite these two last species were native elsewhere in the state of Rio de Janeiro, their local introduction was observed or inferred to Ilha Grande. There are also some native molluscs reported to the island: Uncancylus concentricus (d´Orbigny, 1835), Gundlachia ticaga (Marcus and Marcus, 1962), and Pisidium punctiferum (Guppy, 1867) (Santos et al, 2007(Santos et al, , 2009Lacerda et al, 2011Lacerda et al, , 2015Braga et al, 2014).…”