Caption
G. stoermeri collected for the US EPA National Rivers and Streams Assessment from an unnamed tributary to Conlan Creek, Clark County, WI (44.55144, -90.6524, site ID FW08WI001). Specimen at upper left collected on 01 September 2009, all others collected on 22 July 2009. pH ranged from 7.05 to 7.07 on the two collection dates.
