At the World Malacological Congress Ted von Prosovitch and colleagues presented a poster on the highly variable species Pupilla muscorum. They examined morphlogy, ecology and molecular data (COI & CytB) on populations from Scandinavia, Germany and Poland. In the past these were considered two species (muscorum and alpicola) and one ecophenotype (var. pratensis). Their new data shows that three forms were closely related, but distinct and that they should all be considered species. Once the full data has been published, we will be able to review the UK populations to see if any of the northern calcareous fen populations match P. pratensis (Clessin, 1871).
von Prosovitch, T., Schander, C. Jueg, U. & Thorkildsen, T. (2007) Pupilla pratensis (Clessin, 1871) a distinct species in the form group of Pupilla muscorum. Abtracts of the World Congress of Malacology, 2007. Eds K. Jordaens et al. pp. 235-6.