Lagunar systems of eastern coast of Corsica. Micrograzer and detritus feeder. Original taxon: Paludestrina bigugliana. This could only be a local variant of stagnorum. The species was described from the coastal lagoon of Chjurlinu-Biguglia, Bastia area. The shell is characterized by a conspicuously expanded last whorl. Above: a specimen, a little stocky, from Balistra lagoon, north-east of Bonifaccio, S. Corsica. 4,15mm.

« Shell regularly conical, slender; test yellow-greenish or whitish, encrusted, shiny under the crust, then slightly transparent, smooth, often corroded, a bit fragile; summit obtuse; suture well marked; umbilical slit narrow; 6 convex whorls on the spire, of slow and progressive growth, the last whorl more convex than the previous ones; aperture slightly slanted from right to left, ovoid, upper margin very weakly angled, lower margin round; peristome continuous, minimally reflected, mainly near the umbilicus that it covers partially. » – E. Caziot: “Diagnose d’une nouvelle espèce de Paludestrina de l’Île de Corse et complément à la faune des Mollusques terrestres de cette île”, Bulletin de la Société Zoologique de France vol. 33, Paris 1908, p.33 (with drawing).

« This variant differs from the type by its smaller size; its less elongated shape; the whorls a little less convex, especially the last one; by its aperture, more oblique, pyriform instead of ovoid, that is to say more narrowed ». Let us remember that the Hydrobia jenkisi (junior synonym of antipodarum) has been described in 1889 by E. A. Smith after specimens collected near Woolwich and Plumstead, downstream London. The presence of antipodarum in Europe is not recent.