Benthic Macro-invertebrates

Benthic macroinvertebrates for Ohio biotic index computation.

Tubifex Worm, Group 4

Bloodworm Midge Larva, Group 4

Leech, Group 4

Aquatic sowbug, Group 4

Pouch snail, Group 4

Scud, Group 3

Gilled snail, Group 3

Orb snail, Group 3

Blackfly larva, Group 3

Water penny, Group 2

Damselfly nymph, Group 2

Mayfly nymph, Group 2

Crawfish, Group 2

Cranefly larva, Group 2

Dragonfly nymph, Group 2

Caddisfly larva, Group 2

Dobsonfly larva, Group 1

Riffle beetle, group 2

Water snipe fly larva, group 1

Stoneyfly nymph, group 1