Trichoptera (Caddisflies)

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Trichoptera (Caddisflies)
Hydropsychidae - Three thoracic plates gills on
abdomen
Cheumatopsyche Head uniform brown Notch on
anterior of head (viewed from the top)
Hydropsyche orris Head with pattern on top No
anterior notch, but two nodules (H. orris not
pictured here)
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Polycentropidae Polycentropus
There are other caddisflies you may encounter.
These are just a few of the more common taxa
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Leptoceridae Oecetis
There are other caddisflies you may encounter.
These are just a few of the more common taxa
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Diptera
Chironomidae lack segmented legs only head
sclerotized
Tanypodinae predaceous chironomid. Note
elongated head
Elmidae (riffle beetles) sometimes confused with
Chironomidae during sorting (see next slide)
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Coleoptera - Beetles
Elmidae riffle beetles
Dubiraphia
Optioservis
Elmidae adult
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Coleoptera - Beetles
Hydrophilidae Larve
Megaloptera Chauliodes larva Not a Coleoptera but
resembles one
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Ephemeroptera (Mayflies)
Stenonema body flattened
Caenis Square covering over first set of gills
Tricorythodes Triangular covering over first
set of gills
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Gastropoda
Pleurocera
Physella note that shell aperature opens to the
left
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Odonata
Enallagma a common damselfy nymph Three
leaf-shaped gills on posterior end
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Amphipoda look at size of antennae and
spines on posterior end
Hyalella azteca
Short first antenna and no posterior spines
Gammarus fasciatus
Antennae about same length Spines on posterior end
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Isopoda Asellus