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