Mayfly Genus Rhithrogena

Mayflies

Caddisflies

Stoneflies

Taxonomic Navigation -?-

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Ephemeroptera (Mayflies)

» Family Heptageniidae (March Browns, Cahills, Quill Gordons)

» Genus Rhithrogena

Species in Rhithrogena
Rhithrogena futilisWestern Gordon Quill	0	0
Rhithrogena hageniWestern Black Quill	0	0
Rhithrogena impersonataDark Red Quill	0	0
Rhithrogena jejunaDark Red Quill	0	0
Rhithrogena manifesta	0	0
Rhithrogena morrisoniWestern March Brown	0	0
Rhithrogena robusta	0	0
Rhithrogena undulataSmall Western Red Quill	0	0
Rhithrogena virilis	0	0

14 species aren't included.

Pictures Below ↓

This is page 4 of specimens of Rhithrogena. Visit the main Rhithrogena page for:

The behavior and habitat of Rhithrogena.

Pictures of 28 Mayfly Specimens in the Genus Rhithrogena:

Specimen Page:1 2 34

Female Rhithrogena virilis Mayfly Dun

View 6 PicturesI'm guessing this one is Rhithrogena virilis based on collection of a male spinner of similar size and body configuration during the same trip.

Collected June 16, 2018 from the South Fork Snoqualmie River in Washington
Added to Troutnut.com by Troutnut on June 23, 2018

Rhithrogena hageni (Western Black Quill) Mayfly Nymph

View 9 PicturesI'm basing the ID of this near-mature nymph on a male spinner with similar size and markings, collected on the same trip. There isn't a key to reliably identify the nymphs of most Rhithrogena species otherwise.

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

Male Rhithrogena robusta Mayfly Spinner

View 3 PicturesThese specimens were collected from a mating swarm from the east branch of the North Fork of the Touchet River, upstream from the Bluewood Ski Area turn.It was a sunny warm day, mating swarm as 4-8 ft. above this small stream. Four male spinners were collected.Stream photos were taken.

Collected July 15, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on July 15, 2011

Rhithrogena Mayfly Dun

View 1 Pictures

Collected March 27, 2010 from the Big Thompson River in Montana
Added to Troutnut.com by Bnewell on June 26, 2011

Female Rhithrogena Mayfly Spinner

View 1 Pictures

Collected July 9, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on July 10, 2011

Specimen Page:1 2 34

Jargon Defined:

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).

Spinner: There are two winged stages of adult mayflies. They emerge from the water as duns, molt on land (usually) into their fully mature stage, spinners. As spinners, they mate, lay eggs, and die.

Useful References:

Arbona, Fred Jr. 1989. Mayflies, the Angler, and the Trout. Nick Lyons Books.

Caucci, Al and Nastasi, Bob. 2004. Hatches II. The Lyons Press.

Knopp, Malcolm and Robert Cormier. 1997. Mayflies: An Angler's Study of Trout Water Ephemeroptera . The Lyons Press.

Leonard, Justin W. and Fannie A. Leonard. 1962. Mayflies of Michigan Trout Streams. Cranbrook Institute of Science.