Key to common benthic macroinvertebrates of watercourses.

8a) Organism with 3 pairs of jointed legs or none. Body divided into head, thorax with legs, and
abdomen. Only 1 pair of antenna on head. INSECTS




8b) Body with more than 3 pairs of jointed legs. Head with no or 2 pairs of antenna. 8




Return to Couplet 3
Return to BioMAP Central