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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Mayflies (Ephemeroptera) » Pisciforma » Small Minnow Mayflies (Baetidae) » Callibaetis » Callibaetis fluctuans
Photo#144751
Mayfly - Callibaetis fluctuans
Copyright © 2007 Jim Bliss

Mayfly - Callibaetis fluctuans
Fairport, Monroe County, New York, USA
September 10, 2007
Size: 10 mm
I'm assuming that this is a mayfly. Can a species be determined?
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Contributed by Jim Bliss on 10 September, 2007 - 6:18pm
Last updated 11 November, 2015 - 12:16am

Moved
Moved from Callibaetis ferrugineus ferrugineus.
… Roger Rohrbeck, 11 November, 2015 - 12:16am login or register to post comments

Callibaetis
I don't think this is ferrugineus. That species has many more cross veins in the forewing and the marginal intercalaries are usually double. This specimen seems to match the description of a male C. fluctuans very well.
… Lloyd Gonzales, 24 July, 2009 - 7:01pm login or register to post comments

Moved
Moved from Callibaetis ferrugineus.
… Ted Kropiewnicki, 10 July, 2008 - 9:20pm login or register to post comments

Moved
Moved from Callibaetis.
… Ted Kropiewnicki, 10 July, 2008 - 9:15pm login or register to post comments

Callibaetis
Jim-

Your mayfly is a male Callibaetis imago. In New York, (5) Callibaetis species are known, C. ferrugineus ferrugineus, C. fluctuans, C. pallidus, C. pretiosus, and C. skokianus. Yours appears to be C. ferrugineus ferrugineus.
… Roger Rohrbeck, 13 September, 2007 - 4:30am login or register to post comments

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