FIG. 2 in The systematics of Pyrenean and Cantabrian Cochlostoma (Gastropoda, Cyclophoroidea) revisited

FIG. 2. Shell of juvenile (a) and adult (b) Cochlostoma, to show some of the features considered in the descriptions. ap: apex, an: peripheral angle, bw: body whorl, pe: periumbilical area; su: suture, sw: spire whorls, a: angle of ribs to axis. Features of aperture: ca: columellar auriculation, cl: collar of outer lip, ir: inner rim of outer lip, pa: parietal auriculation.