Spring snails (Bythinella spp.) as lake snails? Lake profundal, an unexplored habitat (Gastropoda Prosobranchia: Hydrobioidea)
Boeters, Hans D.; Knebelsberger, Thomas
All known species of Bythinella live in springs or adjacent water bodies. The only known exception is Bythinella lunzensis Boeters, 2008 which inhabits the profundal zone of a lake in the northern Alps. Object of the present paper is an investigation of the profundal zone as habitat of species of Bythinella and to compare the profundal zone with springs, and, finally, to initiate a discussion of postglacial routes of re-colonisation of drainage systems. For the first time, the sampling of 256 mature animals of B. lunzensis and of 81 mature animals of B. austriaca in the profundal zone of another lake, each together with numerous juvenile animals offers the possibility to describe peculiarities of the profundal zone as habitat.