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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 luteum00
Maccaffertium mediopunctatumCream Cahill00
Maccaffertium mexicanumCream Cahill00
Maccaffertium modestumCream Cahill00
Maccaffertium pudicum00
Maccaffertium pulchellumLight Cahill00
Maccaffertium terminatum00
Maccaffertium vicariumMarch Brown00

8 species aren't included.
Common Name
MatchCommon Name
****March Browns and Cahills


Pictures Below ↓

This is page 5 of specimens of Maccaffertium. Visit the main Maccaffertium page for:

  • The behavior and habitat of Maccaffertium.
  • 1 underwater picture of Maccaffertium.

Pictures of 59 Mayfly Specimens in the Genus Maccaffertium:

Specimen Page:1...4567
Maccaffertium vicarium (March Brown) Mayfly NymphMaccaffertium vicarium (March Brown) Mayfly Nymph View 2 Pictures
Collected March 1, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Maccaffertium vicarium (March Brown) Mayfly NymphMaccaffertium vicarium (March Brown) Mayfly Nymph View 3 Pictures
Collected April 19, 2006 from the Beaverkill River in New York
Added to Troutnut.com by Troutnut on April 21, 2006
Maccaffertium mediopunctatum (Cream Cahill) Mayfly NymphMaccaffertium mediopunctatum (Cream Cahill) Mayfly Nymph View 2 Pictures
Collected June 8, 2005 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on May 26, 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 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
Female Maccaffertium terminatum Mayfly SpinnerFemale Maccaffertium terminatum Mayfly Spinner View 5 PicturesI was able to identify this female because I captured her while she was mating with an identifiable male.
Collected June 7, 2007 from the West Branch of the Delaware River in New York
Added to Troutnut.com by Troutnut on June 8, 2007
Male Maccaffertium terminatum Mayfly SpinnerMale Maccaffertium terminatum Mayfly Spinner View 11 PicturesI positively identified this specimen under a microscope with a good key. It was one of the more common species in a generally light mixed bag of mayflies over a big Catskill tailwater last night.

I swooped this one out of the air while it was mating with a female, so I can be certain about her ID as well.
Collected June 7, 2007 from the West Branch of the Delaware River in New York
Added to Troutnut.com by Troutnut on June 8, 2007
Maccaffertium (March Browns and Cahills) Mayfly NymphMaccaffertium (March Browns and Cahills) Mayfly Nymph View 4 Pictures
Collected January 12, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Male Maccaffertium ithaca (Light Cahill) Mayfly DunMale Maccaffertium ithaca (Light Cahill) Mayfly Dun View 6 PicturesBased on the identical size, shape, and relative proportions of different body parts, I'm pretty sure this dun is of the same species as two spinners I collected at about the same time. The color is dramatically different, but that's to be expected with many of these species in the transition from dun to spinner.
Collected June 7, 2007 from the West Branch of the Delaware River in New York
Added to Troutnut.com by Troutnut on June 8, 2007
Maccaffertium vicarium (March Brown) Mayfly NymphMaccaffertium 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
Specimen Page:1...4567
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