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Ephemera simulans (Brown Drake) Mayfly Nymph Pictures

This mayfly was collected from the Namekagon River on January 31st, 2004 and added to on January 25th, 2006.

Video Clip

Ephemera 1
Date ShotJan 13, 2004
Date AddedMar 31, 2006


Recent Discussions of this Nymph

Nice pictures of accompanying Epoicocladius sp. larvae 3 Replies »
Posted by Beardius on Aug 1, 2008
Last reply on Aug 8, 2008 by Beardius
Several of these pictures show larvae of the midge Epoicocladius (Diptera: Churonomidae: Orthocladiinae) attached to the gills of the nymph. This species is an obligate commensal that feeds on organic material that accumulates on hair tufts at the base of the gills. They are almost always present where burrowing mayflies are present in large numbers. Different species of Epoicocladius are found on Ephemera spp., Hexagenia spp., and Litobrancha sp.

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