|
Name |
Picture |
Characteristic |
Taxonomy |
|
Ostracods
<2mm |
 |
1. bean-like
shell
2. filter feeders
3. bivalve carapace |
Class Crustacea
Order Ostracoda
i.e. Cypris sp. |
|
Copepods
.5-3mm |
 |
1. long
antennae
2. tiny eyespot
3. holoplankton |
Class Crustacea
Order Copepoda |
|
Water fleas
.3-10mm |
 |
1. antennae
2. large compound eye
3. holoplankton |
Class Crustacea
Order Cladocera
i.e. Daphnia sp |
|
Isopods
5-20mm |
 |
1. flattened
2. 7 pairs legs
3. scavengers |
Class Crustacea
Order Isopoda |
|
Amphipods
5-25mm |
 |
1. curved
2. compressed body
3. humped back
4. scavengers |
Class Crustacea
Order Amphipoda |
|
Water mites
.5-5mm |
 |
1. 8 legs
2. round body
3. larvae (parasitic)
4.
nymph looks like adult |
Class Arachnida
Order Acarina |
|
Alderfly nymph
5-25mm |
 |
1. one tail
2. long filaments along the abdomen
3. meroplankton |
Class Insecta
Order Megaloptera
Family Sialidae |
|
Caddisfly larva
3-40mm |
 |
1. cylindrical
case for protection
2. distinct case but different materials |
Class Insecta
Order Trichoptera |
|
Stonefly nymph
<15 mm |
 |
1. two jointed
tails (cerci)
2. carnivorous
3. indicates clean water |
Class Insecta
Order Plecoptera |
|
Mayfly nymph
<15mm |
 |
1. three
jointed tails
2. leaf-like gills on sides |
Class Insecta
Order Ephemeroptera |
|
Damselfly
Nymph
<15mm |
 |
1. three leaf
like tail appendages (gills)
2. extendable jaws |
Class Insecta
Order Odonata
Zygoptera |
|
Dragonfly nymph
<15mm |
 |
1. robust
2. no tail appendages
3. extendable jaws |
Class Insecta
Order Odonata
Anisoptera |
|
Water boatman
nymph.and adult
10-15mm |
 |
1. no jaws
2. tube-like beak
3. nymphs don’t have wings |
Class Insecta
Order Hemiptera
Family Corixidae |
|
Water beetle
<45mm |
adult
nymph |
1. strong jaws
2. tough shield
3. fierce predator |
Class Insecta
Order Coleoptera
Family Elmidae |
1. strong jaws
2. long segmented body
3. short legs |
|
Mosquito larva
1-20 mm |
 |
1. long
slender body
2. moves in undulating s curves |
Class Insecta
Order Diptera |
