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Animal Phylum Arthropoda (Arthropods)

Mayflies

Caddisflies

Stoneflies

Taxonomic Navigation -?-

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

Class in Arthropoda
ArachnidaMites and Spiders	0	1
CollembolaSpringtails	0	0
Crustacea-MalacostracaCrayfish, Scuds, and Sowbugs	0	10
Crustacea-Maxillopoda	0	0
InsectaInsects	0	114

Common Name

Match	Common Name
	Arthropods

Pictures Below ↓

This is page 45 of specimens of Arthropoda. Visit the main Arthropoda page for:

The behavior and habitat of Arthropoda.
122 underwater pictures of Arthropoda.

Pictures of 1244 Arthropod Specimens:

Specimen Page:1...444546...126

Eurylophella (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.

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

Female Tricorythodes (Tricos) Mayfly Spinner

View 4 PicturesThis recently deceased Trico was smaller and darker than the others I photographed from the same morning.

Collected September 8, 2006 from the Neversink River in New York
Added to Troutnut.com by Troutnut on October 4, 2006

Siphloplecton 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

Hexagenia 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

Siphloplecton basale (Pseudo-Gray Drake) Mayfly Nymph

View 3 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

Leucrocuta hebe (Little Yellow Quill) Mayfly Nymph

View 4 Pictures

Collected June 9, 2005 from the Bois Brule River in Wisconsin
Added to Troutnut.com by Troutnut on May 26, 2006

Baetisca 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

Ephemera simulans (Brown Drake) Mayfly Nymph

View 3 Pictures

Collected March 1, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Simuliidae (Black Flies) Black Fly Larva

View 3 Pictures

Collected March 13, 2005 from Cascadilla Creek in New York
Added to Troutnut.com by Troutnut on April 5, 2006

Siphloplecton basale (Pseudo-Gray Drake) Mayfly Nymph

View 3 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

Specimen Page:1...444546...126

Jargon Defined:

Naturals: A natural is a real insect (or similar creature) a trout might eat. The term is used to specify the real thing as opposed to its artificial imitation.

Nymph: The juvenile, underwater stages of mayflies, stoneflies, dragonflies, and damselflies and other aquatic insects whose juvenile stages are covered by hard exoskeletons. The word can also refer to the fishing flies which imitate these creatures, in which case it is used as a blanket term for flies imitating any underwater stage of an invertebrate (except for crayfish and leeches).

Tarsal claws: The claws at the tip of the tarsus, on an insect's "foot."

A few (not all) of the abdominal tubercles on this Ephemerella needhami nymph are circled. They are especially large in this species.

Tubercles: 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.