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Mayfly Species Maccaffertium modestum (Cream Cahill)

Pictures Below

This is page 2 of specimens of Maccaffertium modestum. Visit the main Maccaffertium modestum page for:

  • The behavior and habitat of Maccaffertium modestum.

Pictures of 7 Mayfly Specimens in the Species Maccaffertium modestum:

Specimen Page:12
Female Maccaffertium modestum (Cream Cahill) Mayfly SpinnerFemale Maccaffertium modestum (Cream Cahill) Mayfly Spinner View 3 PicturesThis one was collected in in association with this male. It looks quite different, but that's often the case between spinner genders.
Collected August 5, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 19, 2006
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
Specimen Page:12
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