Bithynia majorcinaBithynia majorcina is a species of small freshwater snail with an operculum, an aquatic gastropod mollusc in the family Bithyniidae.DescriptionShell yellowish horn-coloured, glossy, with 5.5 whorls, suture shallow, aperture oval rounded at the top, umbilicus slit like. Shell height 7.6-9.5 mm, width 4.9-6.0 mm.DistributionThe species is only known from Majorca where it lives on calcareous bottom of consolidate sediments with stones in the Torrent Son Jordi, which is the locus typicus, and in the Torrent de Sóller.