Contribution to the biology of ten vertiginid species

Abstract

(Draparnaud) provided new information on their life cycle. Genus Vertigo: the life span is 1–3 years, with most snails dying in the next year after hatching. The reproductive season lasts from half of May till the beginning of September; depending on the life span eggs are laid during 1–3 seasons. The number of eggs per lifetime varies widely, the maximum numbers are 55–79 in