Stefan Clessin
Encyclopedia
Taxa described
He named numerous species of non-marine gastropod mollusks, including:- Bythiospeum pfeifferiBythiospeum pfeifferiBythiospeum pfeifferi is an extinct species of very small freshwater snail that have an operculum, aquatic gastropod mollusk in the family Hydrobiidae....
- Bythiospeum tschapeckiBythiospeum tschapeckiBythiospeum tschapecki is a species of very small freshwater snails that have an operculum, aquatic gastropod mollusks in the family Hydrobiidae.This species is endemic to Austria.-References:* Haase, M. 1996. . Downloaded on 6 August 2007....