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Insect Order Ephemeroptera (Mayflies)

Mayflies

Caddisflies

Stoneflies

Taxonomic Navigation -?-

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Ephemeroptera (Mayflies)

Family in Ephemeroptera
AmeletidaeBrown Duns	0	0
BaetidaeBlue-Winged Olives	0	10
BaetiscidaeArmored Mayflies	0	1
CaenidaeAngler's Curses	0	0
EphemerellidaeHendricksons, Sulphurs, PMDs, BWOs	0	37
EphemeridaeHexes and Big Drakes	0	3
HeptageniidaeMarch Browns, Cahills, Quill Gordons	0	11
IsonychiidaeSlate Drakes	0	0
LeptohyphidaeTricos	0	1
LeptophlebiidaeBlue Quills and Mahogany Duns	0	0
MetretopodidaePseudo-Gray Drakes	0	0
Neoephemeridae	0	0
PolymitarcyidaeWhite Flies	0	0
PotamanthidaeGolden Drakes	0	0
SiphlonuridaeGray Drakes	0	3

8 families aren't included.

Common Name

Match	Common Name
	Mayflies

Pictures Below ↓

This is page 58 of specimens of Ephemeroptera. Visit the main Ephemeroptera page for:

The behavior and habitat of Ephemeroptera.
67 underwater pictures of Ephemeroptera.

Pictures of 828 Mayfly Specimens:

Specimen Page:1...575859...84

Maccaffertium vicarium (March Brown) Mayfly Nymph

View 5 Pictures

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

Female Leptophlebia cupida (Borcher Drake) Mayfly Spinner

View 2 PicturesThis large female Leptophlebia spinner emerged from a nymph I was holding in my room one night. I didn't have time to photograph her and she molted into a spinner before I was home from work in the evening. So here she is as a spinner. I wish I had more photos at more angles, but she flew off and I couldn't find her.

Collected May 18, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Eurylophella (Chocolate Duns) Mayfly Nymph

View 8 Pictures

Collected May 6, 2007 from Mongaup Creek in New York
Added to Troutnut.com by Troutnut on May 18, 2007

Female Callibaetis ferrugineus (Speckled Spinner) Mayfly Spinner

View 9 Pictures

Collected September 4, 2020 from Silver Creek in Idaho
Added to Troutnut.com by Troutnut on September 18, 2020

Male Baetisca laurentina (Armored Mayfly) Mayfly Dun

View 5 PicturesI found this dun floating on the surface at night while I mucked around in the shallows collecting nymphs. I suspect he may have been prompted to emerge by the stress of my disturbance.

Collected May 22, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Male Cinygmula reticulata (Western Ginger Quill) Mayfly Spinner

View 7 PicturesThe lengths of the wing and body, measured with a caliper, are both 8 mm.

Keys in Needham's 1935 Biology of Mayflies point to either Cinygmula reticulata or Cinygmula gartrelli. IT seems to have “cross veins in costal half of fore wing only, slightly margined with brown” and “wings tinged withamber at base and along costal margin of both wings” (gartrelli) as opposed to “all cross veins of both wings faintly but broadly margined with pale smoky” and “wings entirely amber-tinged” (although there is a slight amber tinge throughout, just more pronounced in places) as in reticulata. However, wing length reported for reticulata (9 mm) is closer to this specimen than gartrelli (10 mm). Ventral (Ventral: Toward or on the bottom.) median marks are supposed to be “traces” for reticulata and “present” for gartrelli. Descriptions for both species involve semi-hyaline (Hyaline: Highly transparent, or glassy; usually refers to insect wings, especially those of mayfly spinners.) anterior (Anterior: Toward the front of an organism's body. The phrase "anterior to" means "in front of.") abdominal segments not present on my specimens. Distribution records suggest reticulate lives nearby, so I'm going with that, but I can't confidently rule out gartrelli.

Collected August 1, 2020 from Mystery Creek #237 in Montana
Added to Troutnut.com by Troutnut on August 18, 2020

Female Ephemerella invaria (Sulphur Dun) Mayfly Spinner

View 4 Pictures

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

Rhithrogena impersonata (Dark Red Quill) Mayfly Nymph

View 8 PicturesThis specimen shows one of two distinct color types of Rhithrogena impersonata nymphs. This type is very reddish, especially in the gills, and it was formerly in its own species called Rhithrogena sanguinea.

Collected June 5, 2005 from the Long Lake Branch of the White River in Wisconsin
Added to Troutnut.com by Troutnut on May 24, 2006

Male Ephemera simulans (Brown Drake) Mayfly Spinner

View 2 PicturesThis one hatched in the middle of July, which is very late for this species.

Collected July 14, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Male Ephemerella invaria (Sulphur Dun) Mayfly Dun

View 3 Pictures

Collected May 23, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Specimen Page:1...575859...84

Jargon Defined:

Anterior: Toward the front of an organism's body. The phrase "anterior to" means "in front of."

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.

Hyaline: Highly transparent, or glassy; usually refers to insect wings, especially those of mayfly spinners.

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.

Ventral: Toward or on the bottom.