The head capsule of the aquatic larvae of Hydropsyche contubernalis (Trichoptera: Hydropsychidae) shows color pattern asymmetries. Several sites have been sampled on four French rivers (the Rhine, ...

Aim The goals of this study were to: (1) compare water conductivity and pH as proxy measures of mineral richness in relation to mollusc assemblages in fens, (2) examine the patterns of mollusc species ...