Electronic field guide to AQUATIC MACROINVERTEBRATES of SMALL STREAMS in Eastern Massachusetts
Body flattened, round, and highly segmented; legs completely hidden from above; branched gills attached to abdomen on underside...
PSEPHENIDAE (Water Pennies)
Hindlegs with fringe of long "swimming" hairs along inner edge; antennae slender, without enlarged tips...
DYTISCIDAE (Diving Beetles)
Antennae with club-shaped tips, usually tucked under head and extending backwards; legs relatively short and spiny; ...
HYDROPHILIDAE (Water Scavenger Beetles)
Hindlegs without long hairs or prominent spines; antennae slender, without enlarged tips; body less than 3mm long...
ELMIDAE (Riffle Beetles)
Two separate pairs of eyes, one on top and one on underside of head; middle and hind legs flattened, paddle-like.GYRINIDAE (Whirligig Beetles)
Dineutus
Hind legs each with a large plate attached at the base that partly cover underside of abdomen.HALIPLIDAE
Peltodytes
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