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Arthropod Class Insecta (Insects)

Mayflies

Caddisflies

Stoneflies

Taxonomic Navigation -?-

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

Order in Insecta
ColeopteraBeetles	0	1
DipteraTrue Flies	0	9
EphemeropteraMayflies	0	67
HemipteraTrue Bugs	0	7
HymenopteraAnts, Bees, and Wasps	0	0
LepidopteraMoths	0	0
MegalopteraHellgrammites, Dobsonflies, and Alderflies	0	0
Odonata-AnisopteraDragonflies	0	0
Odonata-ZygopteraDamselflies	0	0
OrthopteraGrasshoppers and Crickets	0	0
PlecopteraStoneflies	0	6
Psocodea	0	0
TrichopteraCaddisflies	0	55

1 order isn't included.

Common Name

Match	Common Name
	Insects

Pictures Below ↓

This is page 116 of specimens of Insecta. Visit the main Insecta page for:

The behavior and habitat of Insecta.
114 underwater pictures of Insecta.

Pictures of 1229 Insect Specimens:

Specimen Page:1...115116117...124

Attenella margarita (Little Western Blue-Winged Olive) Mayfly Nymph

View 7 PicturesNotes from the microscope on the ID: Maxillary palp (

The palp on the maxilla of an Ephemerella nymph (detached and photographed under a microscope) is highlighted in red here.

Palp: A long, thin, often segmented appendage which can protrude from certain insect mouth parts such as the maxillae. Also known as the < />palpus.) is present, distinctly 2-segmented, but very small. Gills on segment 4-7. This specimen has some unfortunate damage to the abdomen, but it's the only one I found in my sample.

Collected August 3, 2020 from the East Fork Big Lost River in Idaho
Added to Troutnut.com by Troutnut on August 19, 2020

Zapada cinctipes (Tiny Winter Black) Stonefly Adult

View 1 Pictures

Collected April 17, 2012 from the N. Fk. Touchet River in Washington
Added to Troutnut.com by Bnewell on April 21, 2012

Male Baetis (Blue-Winged Olives) Mayfly Spinner

View 2 PicturesProbably Baetis tricaudatus.

Collected July 13, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on July 13, 2011

Kathroperla perdita (Sallfly) Stonefly Nymph

View 1 PicturesThis species is uncommonly collected except from wells. It is a hyporheic species living in the river gravels of river floodplains until it is ready to emerge.
The head shape is an important identifier.

Collected April 15, 2010 from the Flathead River-upper in Montana
Added to Troutnut.com by Bnewell on June 26, 2011

Female Epeorus albertae (Pink Lady) Mayfly Dun

View 1 Pictures

Collected June 29, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on June 29, 2011

Maccaffertium modestum (Cream Cahill) Mayfly Nymph

View 2 PicturesI looked at this nymph closely under my crappy microscope. It has truncate (Truncate: Cut off. This is often used to describe the square appearance of the gills of Maccaffertium mayfly nymphs, for example, as opposed to the pointed gills of the closely related genus Stenacron.) as opposed to rounded gills, postero-lateral (Lateral: To the side.) spines only on abdominal segments 7-9, and oblique crossbars through the center of each sterna, not on the posterior (Posterior: Toward the back of an organism's body. The phrase "posterior to" means "in back of.") edge like on some of the other Maccaffertium species. As best I can tell from the keys this is either modestum or ithaca and from the distribution maps I've seen I'm guessing it's modestum.

Collected March 10, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 19, 2006

Female Epeorus albertae (Pink Lady) Mayfly Spinner

View 1 PicturesIt is hard to see where the name "Pink Lady" comes from.

Collected June 29, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on June 29, 2011

Hydropsychidae Caddisfly Adult

View 2 PicturesThese specimens are either Cheumatopsyche or Hydropsyche. They escaped before I could catch them.I suspect, based on size, they are Hydropsyche, they are about 1/4 inch in length. Both H. occidentalis and H. californica are common in the Touchet River.

Collected July 27, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on July 29, 2011

Hexatoma True Fly Larva

View 5 Pictures

Collected July 4, 2020 from Mystery Creek #249 in Washington
Added to Troutnut.com by Troutnut on July 12, 2020

Paraleuctra occidentalis (Tiny Winter Black) Stonefly Adult

View 1 PicturesMembers of the family Leuctridae are usually easily identified to family due to the "rolled" wing. They are small, nearly 1/4 " in length, black in color and emerge in early spring.

Collected March 7, 2012 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on March 20, 2012

Specimen Page:1...115116117...124

Jargon Defined:

Abdomen: The rear and usually the longest (ten-segmented in mayflies) portion of an insect's body, to which the tails are attached.

Lateral: To the side.

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).

The palp on the maxilla of an Ephemerella nymph (detached and photographed under a microscope) is highlighted in red here.

Palp: A long, thin, often segmented appendage which can protrude from certain insect mouth parts such as the maxillae. Also known as the < />palpus.

Posterior: Toward the back of an organism's body. The phrase "posterior to" means "in back of."

Truncate: Cut off. This is often used to describe the square appearance of the gills of Maccaffertium mayfly nymphs, for example, as opposed to the pointed gills of the closely related genus Stenacron.