Glossosoma boltoni is widespread throughout Europe, excluding
Scandinavia and the southern Balkan; the distribution area extends
eastwards to N- and NW-Russia1.
The species develops in large streams and small to medium-sized
rivers (Botosaneanu & Malicky 1978, Pitsch 1993, Robert &
Wichard 1994, Waringer & Graf 1997, Wallace et al. 2003). The
larvae are typical inhabitants of the upper side of stones and are
not found on muddy or sandy substratum (Waringer & Graf 1997).
Larvae are scrapers and feed on epilithic algae and detritus (Graf
et al. 2002).
Adults are present from April to October (Waringer & Graf 1997).