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Insect Order Ephemeroptera (Mayflies)

Pictures Below

This is page 70 of specimens of Ephemeroptera. Visit the main Ephemeroptera page for:

  • The behavior and habitat of Ephemeroptera.
  • 67 underwater pictures of Ephemeroptera.
  • 1 streamside picture of Ephemeroptera.

Pictures of 692 Mayfly Specimens:

Specimen Page:1...67686970
Maccaffertium modestum (Cream Cahill) Mayfly NymphMaccaffertium 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
Baetis (Blue-Winged Olives) Mayfly AdultBaetis (Blue-Winged Olives) Mayfly Adult View 1 Pictures
Collected March 1, 2005 from the Jocko River in Montana
Added to Troutnut.com by Bnewell on June 28, 2011
Male Paraleptophlebia falcula Mayfly SpinnerMale Paraleptophlebia falcula  Mayfly Spinner View 0 PicturesTwo males were collected at 3300' elevation. No photos were taken of this rare species. The adults are quite small and look very similar to P. memorialis but smaller.
Collected July 22, 2012 from the N. Fk. Touchet River in Washington
Added to Troutnut.com by Bnewell on July 27, 2012
Male Heptagenia adaequata Mayfly SpinnerMale Heptagenia adaequata  Mayfly Spinner View 0 PicturesCollected near the Columbia River at Pasco, WA.
Collected July 22, 2012 from the Columbia River in Washington
Added to Troutnut.com by Bnewell on July 26, 2012
Female Paraleptophlebia (Blue Quills and Mahogany Duns) Mayfly SpinnerFemale Paraleptophlebia (Blue Quills and Mahogany Duns) Mayfly Spinner View 0 PicturesFinal identification is pending but this species is near P. memorialis.
Collected June 15, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on June 26, 2011
Specimen Page:1...67686970
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