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Female Amphinemura (Tiny Winter Blacks) Stonefly Adult Pictures

 A few of these tiny stoneflies were among the only species of aquatic insect adults in the air on this particular afternoon, with most of the action coming from a species of Epeorus mayfly. I somehow forgot to photograph this one on the usual ruler, but I recall it was very, very small, with an abdomen no more than 1mm in girth and the body, not counting the wings, probably just 5-7mm long.

This stonefly was collected from Mystery Creek #23 on September 6th, 2006 and added to Troutnut.com on October 3rd, 2006.

Recent Discussions of this Adult

Small stonefly photos 9 Replies »
Posted by JaneBug on Jan 25, 2007
Last reply on Jan 28, 2007 by DMM
The stonefly in this series of photos is not a Capniidae. It is a Nemouridae, a female Amphinemura. The yellow abdomen has eggs inside. Message from a stonefly researcher from Pennsylvania.
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