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Closeup insects from Miscellaneous

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Baetidae (Blue-Winged Olives) Mayfly NymphBaetidae (Blue-Winged Olives) Mayfly Nymph View 3 PicturesThis specimen has indistinct gill veinlets (Veinlet: Short insect wing veins connecting the major longitudinal veins to the wing margin.), a rounded seventh gill, and no bands on the tails.
Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Epeorus vitreus (Sulphur) Mayfly NymphEpeorus vitreus (Sulphur) Mayfly Nymph View 3 PicturesKey features I discerned with a microscope include that the femoral flange is sharp, and the first gill is not extended.
Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Eurylophella (Chocolate Duns) Mayfly NymphEurylophella (Chocolate Duns) Mayfly Nymph View 3 Pictures
Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Eurylophella (Chocolate Duns) Mayfly NymphEurylophella (Chocolate Duns) Mayfly Nymph View 3 PicturesLooking at this specimen under a microscope revealed prominent sharp abdominal tubercles (
A few (not all) of the abdominal tubercles on this Ephemerella needhami nymph are circled. They are especially large in this species.
A few (not all) of the abdominal tubercles on this Ephemerella needhami nymph are circled. They are especially large in this species.
Tubercle: Various peculiar little bumps or projections on an insect. Their character is important for the identification of many kinds of insects, such as the nymphs of Ephemerellidae mayflies.). Also, abdominal segment 9 is distinctly longer than abdominal segment 8, meaning this is definitely a Eurylophella nymph.
Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Eurylophella (Chocolate Duns) Mayfly NymphEurylophella (Chocolate Duns) Mayfly Nymph View 3 PicturesThis nymph is an extremely early instar (Instar: Many invertebrates molt through dozens of progressively larger and better-developed stages as they grow. Each of these stages is known as an instar. Hard-bodied nymphs typically molt through more instars than soft-bodied larvae.).
Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Onocosmoecus unicolor (Great Late-Summer Sedge) Caddisfly LarvaOnocosmoecus unicolor (Great Late-Summer Sedge) Caddisfly Larva View 3 Pictures
Collected March 1, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Siphloplecton basale (Pseudo-Gray Drake) Mayfly NymphSiphloplecton basale (Pseudo-Gray Drake) Mayfly Nymph View 4 PicturesThis nymph has double front tarsal claws (Tarsal claw: The claws at the tip of the tarsus, on an insect's "foot.") and double gills on the first three abdominal segments.
Collected March 1, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Sialis Alderfly LarvaSialis Alderfly Larva View 3 Pictures
Collected March 1, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Baetisca laurentina (Armored Mayfly) Mayfly NymphBaetisca laurentina (Armored Mayfly) Mayfly Nymph View 3 PicturesI took a few group picture of a bunch of Baetisca laurentina nymphs to show the degree of individual variation in size, color, and shape that can occur within the same species in the same pool of the same river. This variation is one important reason why trout are forgiving of some small degree of variation in our imitations--the naturals themselves vary, too.
Collected March 1, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Hexagenia limbata (Hex) Mayfly NymphHexagenia limbata (Hex) Mayfly Nymph View 3 Pictures
Collected March 1, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
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