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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 73 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...727374...124

Rhithrogena Mayfly Nymph

View 1 PicturesBased on the lack of coloration and the two bars on the last tergite (

One tergite of this Isonychia bicolor mayfly spinner is highlighted in red.

Tergite: The top (dorsal) part of a single segment on an insect's abdomen when it consists of a single chitinous plate (sclerite), or an individual sclerite if the segment has more than one.) this may be Rhithrogena virilis.

Collected May 12, 2005 from Hungry Horse Creek in Montana
Added to Troutnut.com by Bnewell on June 28, 2011

Rhithrogena Mayfly Nymph

View 1 Pictures

Collected May 12, 2005 from Hungry Horse Creek in Montana
Added to Troutnut.com by Bnewell on June 28, 2011

Male Neoleptophlebia heteronea (Blue Quill) Mayfly Adult

View 1 Pictures

Collected May 16, 2012 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on May 18, 2012

Male Litobrancha recurvata (Dark Green Drake) Mayfly Spinner

View 1 PicturesThese photos were contributed by Spencer Vanderhoof.

Collected May 15, 2010 from the Au Sable River (Mainstream) in Michigan
Added to Troutnut.com by Entoman on March 3, 2012

Male Litobrancha recurvata (Dark Green Drake) Mayfly Dun

View 1 PicturesThese photos were contributed by Spencer Vanderhoof.

Collected May 15, 2010 from the Au Sable River (Mainstream) in Michigan
Added to Troutnut.com by Entoman on March 3, 2012

Hexagenia limbata (Hex) Mayfly Nymph

View 4 Pictures

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

Female Epeorus vitreus (Sulphur) Mayfly Dun

View 6 Pictures

Collected May 28, 2005 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on May 24, 2006

Male Malenka tina (Tiny Winter Black) Stonefly Adult

View 7 PicturesThis is the smallest stonefly I've ever collected, with a body only 5.5 mm long.

Although not in-focus in my pictures, its first tarsal segment is similar in length to the third, while the second is much shorter. This helps with family-level identification.

Examining this specimen under a microscope shows a membranous lobe on the dorsal (Dorsal: Top.) base of the cerci (Cercus: The left and right "tails" of an insect are known as the cerci or caudal cerci. The middle tail of a three-tailed insect is not.), which is the key characteristic in Merritt & Cummins (4th ed.) to place the genus definitively as Malenka.

Following the species key in Jewett Jr's Stoneflies of the Pacific Northwest, the species appears to be Malenka tina. My dissecting microscope seems to show sternite (

One sternite of this Isonychia bicolor mayfly spinner is highlighted in red.

Sternite: The bottom (ventral) part of a single segment on an insect's abdomen.) 9 ending in a rounded knob, which distinguishes it from Malenka bifurcata, but the detail is hard to work out.

Also worth noting is that Montana appears to have this species, whereas birfucata is not know there: http://fieldguide.mt.gov/displaySpecies.aspx?family=Nemouridae

Collected July 1, 2019 from the Madison River in Montana
Added to Troutnut.com by Troutnut on July 18, 2019

Chironomidae (Midges) Midge Adult

View 1 PicturesMidges of the family Chironomidae are probably the most widespread aquatic insect in the world.

Collected June 15, 2010 from unknown in Montana
Added to Troutnut.com by Bnewell on June 27, 2011

Male Baetis flavistriga (BWO) Mayfly Nymph

View 8 PicturesThis nymph keys to Baetis assuming the villipore is present (hard to see in my photos or scope), and within that genus it tentatively keys to the flavistriga species complex, of which Baetis flavistriga itself is by far the most common in Washington state, so that's the most likely ID.

Collected July 6, 2020 from Mystery Creek #249 in Washington
Added to Troutnut.com by Troutnut on July 12, 2020

Specimen Page:1...727374...124

Jargon Defined:

Cerci: The left and right "tails" of an insect are known as the cerci or caudal cerci. The middle tail of a three-tailed insect is not.

Dorsal: Top.

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).

One sternite of this Isonychia bicolor mayfly spinner is highlighted in red.

Sternite: The bottom (ventral) part of a single segment on an insect's abdomen.

One tergite of this Isonychia bicolor mayfly spinner is highlighted in red.

Tergite: The top (dorsal) part of a single segment on an insect's abdomen when it consists of a single chitinous plate (sclerite), or an individual sclerite if the segment has more than one.