Electronic field guide to AQUATIC MACROINVERTEBRATES of SMALL STREAMS in Eastern Massachusetts
Body very small (less than 2mm long), metallic green; "breast plate" narrow, pointed
Paracymus
Body small, metallic green (less than 3mm long); "breast plate" low, wide
Anacaena
Body brown, mid-sized (about 1 cm long), larger than most other Hydrophilids
Sperchopsis
Legs not visible from above
Anacaena
Legs visible from above
Sperchopsis
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