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Photo#1077448
Callibaetis ferrugineus - female

Callibaetis ferrugineus - Female
St. Albert, Alberta, Canada
June 2, 2015
Size: 11mm
Callibaetis ferrugineus. Just confirming. Next image has some kind of orange thing near left front leg. Thanx. Al.

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Callibaetis ferrugineus - female Callibaetis ferrugineus - female Callibaetis ferrugineus - female

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Callibaetis ferrugineus
Hi Al-

My goodness, what stunning photographic images you take! Yes, I share your belief that this female subimago is Callibaetis ferrugineus. As to the "orange thing near left front leg", I believe it to be a parasite, which appears to have attached itself both fore and aft, with its body is hanging from the attachment points, hammock-like.

 
Thanx
Hi, Roger. Thank you for the compliment. An entomologist sent me an e-mail earlier today, "Yes, it is indeed a water mite larva (Prostigmata: Parasitenonga: Hydrachnidiae), but I can't tell what family. It looks rather desiccated and is probably dead. Al, based on the cloudy wings I assume this mayfly is a subimago rather than an imago?".

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