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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 23 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...222324...126

Heptagenia pulla (Golden Dun) Mayfly Nymph

View 8 PicturesLike most Alaskan mayflies, this one is tricky to identify to the species level. See the discussion section for an informative chat about this one's ID. The current leaning is to call it a fairly immature Heptagenia pulla nymph, but a case has been made for Heptagenia elegantula as well.

Collected July 10, 2011 from Nome Creek in Alaska
Added to Troutnut.com by Troutnut on July 13, 2011

Stenacron interpunctatum (Light Cahill) Mayfly Nymph

View 7 Pictures

Collected June 5, 2005 from the Marengo River in Wisconsin
Added to Troutnut.com by Troutnut on May 25, 2006

Female Baetis (Blue-Winged Olives) Mayfly Dun

View 5 PicturesI found this female in the same area as a male with similar markings, probably of the same species.

Collected September 19, 2006 from Mystery Creek #43 in New York
Added to Troutnut.com by Troutnut on October 4, 2006

Maccaffertium (March Browns and Cahills) Mayfly Nymph

View 5 Pictures

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

Agnetina capitata (Golden Stone) Stonefly Nymph

View 5 Pictures

Collected March 29, 2005 from Salmon Creek in New York
Added to Troutnut.com by Troutnut on April 7, 2006

Female Isonychia bicolor (Mahogany Dun) Mayfly Dun

View 6 PicturesI thought this dun was worth photographing, even though she's in pretty bad shape, because she shows something I haven't seen in Isonychia elsewhere. The bright stripe down the back which is normally present only in the nymph carried over to the dun in this one.

Collected May 26, 2007 from Penn's Creek in Pennsylvania
Added to Troutnut.com by Troutnut on June 4, 2007

Calopteryx Damselfly Nymph

View 4 Pictures

Collected January 31, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Female Leptophlebia (Black Quills and Blue Quills) Mayfly Spinner

View 6 PicturesI collected this specimen along with a female dun of the same species. Unfortunately it's not in very good shape.

After poking at it for a while under a microscope with a good scientific key in hand, I'm pretty sure this is either Leptophlebia cupida or Leptophlebia nebulosa. I can't tell which.

Collected May 9, 2007 from Factory Brook in New York
Added to Troutnut.com by Troutnut on May 18, 2007

Hexagenia limbata (Hex) Mayfly Nymph

View 4 PicturesThis medium-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.) nymph is about an inch long.

Collected January 12, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Belostoma flumineum (Electric Light Bug) Giant Water Bug Adult

View 4 PicturesI haven't seen the imitation of these things stressed, but in August 2003 on one of my favorite rivers the largest brown trout I kept had stomachs full of these things.

Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Specimen Page:1...222324...126

Jargon Defined:

Dun: Mayflies have two adult stages. They first emerge from the water as duns (scientifically known as the subimago stage). They then molt into the spinner (imago) stage, in which they mate and die. Sometimes the word "dun" is confusingly used to refer to a brownish gray color in fly tying materials.

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.

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).