BIO 203


The Helicodiscus parallelus is found in Northeastern U.S. forests, Europe, Southeast Asia, and Australia (Hotopp, K.P.).  This species can be found in sizeable colonies, commonly located in humid forest or wetland areas (Martin, 33).  Wetland areas preferred by this species are fens, where ground water diffuses to the surface into pools.  Within this classification of wetlands, the fen type most associated with Helicodiscidae is the calcareous fen.  These areas are also instrumental in interactions with other organisms, including humans (Bedford, 608).
Rotting wood is the preferred habitat of these snails, they are able to stay hydrated because of the constant supply of water from underground reserves, and able to stay nourished because of the abundance of rotting vegetation and organic materials.