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Mayfly Sex Identification: Male or Female
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2006/9/8 9:35
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Rolling thru my mayfly photos I was able to take a many pictures at one of the Spring Jams two years ago. I wanted to demonstrate the differences the differences between spinner (imago) male and female. These two coffin flies (Ephemera guttulata ) attached show these differences.

Male (top photo)
Long fore legs
Rear claspers or forceps at rear of body
Eyes on a male tend to be larger and more bulbus

Female
Short fore wing
Forceps do not exist
Smaller flatter eyes

Attach file:



jpg  Coffin Fly Male 2010-05-17.jpg (47.09 KB)
1_4f8ff23b55db2.jpg 640X427 px

jpg  Coffin Fly Female 2010-05-17.jpg (61.87 KB)
1_4f8ff24c2c7d2.jpg 428X640 px

Posted on: 2012/4/19 7:36
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