The ultimate goal of this project "The Conchological Albums - Terrestrial Molluscs" is to figure world's biodiversity of land snails as complete as possible. Volume 12 of this series figures 657 shells that belong to 280 different species and 61 subspecies. Treated genera: Cerion, Allodiscus, Amphidoxa, Andrefrancia, Annoselix, Charopa, Charopella, Cralopa, Elsothera, Fectola, Flammulina, Goweroconcha, Gyrocochlea, Isolderopa, Lorelleia, Luinodiscus, Micromphalia, Monomphalus, Nautiliropa, Pernagera, Phacussa, Phenacharopa, Philalanka, Pilula, Ptychodon, Radiodiscus, Reticulapex, Ruthvenia, Serpho, Sinployea, Suteria, Teracharopa, Thalassohelix, Therasia, Trachycystis, Xerocystis, Abida, Chondrina, Granaria, Graniberia, Granopupa, Rupestrella, Solatopupa, Atrichoconcha, Bekkochlamys, Exrhysota, Hemiglypta, Hemiglyptopsis, Hemitrichiella, Japanochlamys, Kaliella, Lamarckiella, Lepidotrichia, Parakaliella, Pararyssota, Ryssota