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Mayfly Species Maccaffertium vicarium (March Brown)

Pictures Below

This is page 3 of specimens of Maccaffertium vicarium. Visit the main Maccaffertium vicarium page for:

  • The behavior and habitat of Maccaffertium vicarium.

Pictures of 19 Mayfly Specimens in the Species Maccaffertium vicarium:

Specimen Page:123
Maccaffertium vicarium (March Brown) Mayfly NymphMaccaffertium vicarium (March Brown) Mayfly Nymph View 3 PicturesI keyed this nymph to Stenonema fuscom, which is now synonymized with Maccaffertium vicarium. However, the size, markings, and time of year make me very skeptical of this identification.
Collected June 9, 2005 from the Bois Brule River in Wisconsin
Added to Troutnut.com by Troutnut on May 26, 2006
Male Maccaffertium vicarium (March Brown) Mayfly DunMale Maccaffertium vicarium (March Brown) Mayfly Dun View 4 PicturesThis is the only Heptageniid mayfly I saw hatch on May 24, 2004, and luckily it floated right by me.

Edit: Gonzo confirmed most likely vicarium 06.21.12
Collected May 24, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Specimen Page:123
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