A new start in Pyramidula (Gastropoda Pulmonata: Pyramidulidae)

In Europe, the genus Pyramidula is much more diverse than generally accepted. The type species, P. rupestris, is wide-spread, but only regionally common. P. jaenensis might be its sister species. In Britain, the most widely distributed and most common continental species, i.e. P. pusilla, is replaced by P. umbilicata; these two taxa could also be considered conspecific subspecies, however. In the NE. Mediterranean area, P. cephalonica and P. chorismenostoma, are either sister species, or the latter taxon is based on a conspicuous mutant of the former one.