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Photographs by Christie Gibbons '05 of (L-R) Web-Spinning Caddisfly and Gammarus fasciatus

Invertebrates: May 2, 2005

Site One: Turtle Mound Inlet

Site Two: Union Lake Outlet

Site Three: Horse Farm Inlet

Site Four: Cannon River Entry

Site Five: St. Olaf Site

Amphiod (scud) = Gammarus

Ostracod

Copepod (2 tails single eye, antennae, swimming appendage)

Arthropoda: Gammarus fasciatus

Arthropoda: Gammarus fasciatus

Snails and limpets (Gastropoda lymnaeidae) ranged from 2-25mm

A maroon, black and white water spider (?)

Snails and limpets (2-25mm)

Hirudinea (leeches) they have a high tolerance, about 15mm

Arthropoda: Gammarus fasciatus (lots of them)

Ephemeridae: Hexagenia limbata. (These are common Burrowing Mayflies found in soft stream silt/sand, feathered gills on segments 2-7, collector/gatherer)

Ephemeroptera larvae: Heptageniidae (Flathead Mayflies), common in streams under rocks, logs, and vegetation, 5-20mm

Snails and limpets (Physella gyrina) 2-10mm, scrapers, found on rocks, vegetation, silt, and sand in streams

Diptera maggot: Tipulidae (Crane Fly), 50-60mm, found under rocks, sand, leafs in streams

Trichoptera (Web-spinning Caddisfly), white segments, about 15mm

Gammarus fasciatus

Ephemeroptera larvae: Heptageniidae (Flathead Mayflies)

Diptera maggot: Tipulidae (Crane Fly)

Trichoptera (Web-spinning Caddisfly)

2 large crayfish

1 small crayfish

3 small spotted fish with nice blue coloring

A giant, writihing crane fly maggot

A fingernail clam shell

2+ caddisfly larva (stick and rock case builders)

1 darter

 

*According to the Invertebrates team, many of the same specimens were collected on the 9th. The notable exceptions are in Site 5, where the invertebrates listed above, as well as Limmephildae Larvae, Spread-winged damsel fly larvae and Libellulidae (Common Skimmer Dragonfly) were collected on the 9th.

 

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