These pheromones were taken by hexane extracts from wholes bodies and thoraces of unmated females.
No dense tufts or branching gills are found on their thoraces or abdomens.
Their limbs are moderately long, and their thoraces are proportional.
Their thoraces range in color from red to orange to reddish brown.
Unlike the similar common stoneflies, perlodid larvae do not have branching gills on their thoraces.
Gollumiellinae larvae burrow into the hosts' thoraces and feed there.
