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Mayfly Genus Maccaffertium (March Browns and Cahills)

Taxonomic Navigation -?-
» Genus Maccaffertium (March Browns and Cahills)
Species in MaccaffertiumNumber of SpecimensNumber of Pictures
Maccaffertium ithacaLight Cahill00
Maccaffertium luteum14
Maccaffertium mediopunctatumCream Cahill534
Maccaffertium mexicanumCream Cahill722
Maccaffertium modestumCream Cahill725
Maccaffertium pulchellumLight Cahill00
Maccaffertium terminatum525
Maccaffertium vicariumMarch Brown1156

9 species aren't included.
Common Name
MatchCommon Name
****March Browns and Cahills
Pictures Below ↓

This is page 7 of specimens of Maccaffertium. Visit the main Maccaffertium page for:

  • The behavior and habitat of Maccaffertium.
  • 1 underwater picture of Maccaffertium.
  • 2 streamside pictures of Maccaffertium.

Pictures of 60 Mayfly Specimens in the Genus Maccaffertium:

Specimen Page:1...4567
Maccaffertium (March Browns and Cahills) Mayfly NymphMaccaffertium (March Browns and Cahills) Mayfly Nymph View 3 Pictures
Collected January 14, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Maccaffertium (March Browns and Cahills) Mayfly NymphMaccaffertium (March Browns and Cahills) Mayfly Nymph View 3 Pictures
Collected January 14, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Maccaffertium (March Browns and Cahills) Mayfly NymphMaccaffertium (March Browns and Cahills) Mayfly Nymph View 2 Pictures
Collected January 14, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Maccaffertium (March Browns and Cahills) Mayfly NymphMaccaffertium (March Browns and Cahills) Mayfly Nymph View 3 Pictures
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Maccaffertium (March Browns and Cahills) Mayfly NymphMaccaffertium (March Browns and Cahills) Mayfly Nymph View 2 PicturesI saw under a microscope that the gills on this specimen aren't tracheated.
Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 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
Female Maccaffertium terminatum Mayfly DunFemale Maccaffertium terminatum Mayfly Dun View 2 Pictures
Collected July 9, 2005 from the Flathead River-Lower in Montana
Added to Troutnut.com by Bnewell on June 27, 2011
Specimen Page:1...4567
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