Tweet this page Like this page Email this page Share this page Home» Resources » Identification » Animals » Freshwater invertebrates guide » Identification guide » Jointed legs » Insects and springtails » Stoneflies » Stonefly Guide to New Zealand's freshwater invertebrates Stonefly ( Gripopterygidae : Nesoperla ) Abdomen with pale diagonal markings Diagnostic features Nesoperla stonefly nymphs are among the gripopterygids that have a rosette of anal gills between the cerci (“tails”). The abdominal segments have distinct pale diagonal markings on the upper surface. Typical habitats Nesoperla are among the less commonly recorded stoneflies. They are only semi aquatic and can be found in stony streams or in their floodplains. Feeding They may feed on stream biofilms, and plant detritus from within and outside of the stream. Indicator value Nesoperla nymphs are infrequently recorded and we have limited knowledge of their indicator value. They have mid-range tolerance values of 5 (hard bottom sites) and 5.7 (soft bottom sites).