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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 116 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...115116117...126

Male Skwala (Large Springflies) Stonefly Adult

View 1 Pictures

Collected May 9, 2005 from the Jocko River in Montana
Added to Troutnut.com by Bnewell on July 3, 2011

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

Female Epeorus longimanus (Slate Brown Dun) Mayfly Spinner

View 2 Pictures

Collected July 26, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on July 26, 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

Male Claassenia sabulosa (Golden Stone) Stonefly Adult

View 2 PicturesThe males have these abbreviated wings. I doubt they can fly but they can run faster than any stonefly I have seen. The also have an interesting habit of jumping.

Collected August 3, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on August 3, 2011

Isoperla quinquepunctata (Little Yellow Stonefly) Little Yellow Stonefly Nymph

Isoperla quinquepunctata (Little Yellow Stonefly) Stonefly Nymph

View 2 PicturesSize - (excluding tails) - 10 mm
Status at time of photo - preserved but no discernible color change as specimen was captured only a few days earlier.
Key characters - unique pattern on dorsal (Dorsal: Top.) head and thorax (Thorax: The thorax is the middle part of an insect's body, in between the abdomen and the head, and to which the legs and wings are attached.); dark medial (Medial: Toward the middle of the body.) terga (Tergum: the dorsal part of an abdominal segment or segments (terga). Also used to describe the entire abdominal dorsum or the thoracic dorsal segments of Odonata.) stripe between two paler stripes

This species is very common in west slope north Sierra watersheds. Richard W. Baumann & Boris C. Kondratieff did a study on the same section and at the same time of year (APRIL 25-29, 2010) where this specimen was taken. No other species of Isoperla were reported from this location and quinquepunctata was very abundant. Their hatches can be very heavy some Springs.

Entoman

Collected March 21, 2011 from the Lower Yuba River in California
Added to Troutnut.com by Entoman on November 1, 2011

Female Zapada columbiana (Tiny Winter Black) Stonefly Adult

View 2 Pictures

Collected March 26, 2012 from the N. Fk Touchet River in Washington
Added to Troutnut.com by Bnewell on March 26, 2012

Male Cinygmula mimus Mayfly Adult

View 1 Pictures

Collected May 20, 2012 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on May 25, 2012

Drunella coloradensis (Small Western Green Drake) Mayfly Nymph

View 5 Pictures

Collected July 28, 2019 from Mystery Creek #199 in Washington
Added to Troutnut.com by Troutnut on July 30, 2019

Female Siphlonurus occidentalis (Gray Drake) Mayfly Dun

View 6 PicturesI caught this specimen two days' walk from my macro lenses, but I don't think I have a dun of this species yet, so I took the best photos I could with my iPhone.

Collected August 30, 2020 from Island Lake in Wyoming
Added to Troutnut.com by Troutnut on September 18, 2020

Specimen Page:1...115116117...126

Jargon Defined:

Dorsal: Top.

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.

Medial: Toward the middle of the body.

Terga: the dorsal part of an abdominal segment or segments (terga). Also used to describe the entire abdominal dorsum or the thoracic dorsal segments of Odonata.

Thorax: The thorax is the middle part of an insect's body, in between the abdomen and the head, and to which the legs and wings are attached.