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Home » Guide » Arthropods (Arthropoda) » Insects (Insecta) » Mayflies (Ephemeroptera) » Stream Mayflies (Heptageniidae) » Stenacron
Photo#250235
Flatheaded Mayfly - Stenacron
Copyright © 2009 Stephen Luk

Flatheaded Mayfly - Stenacron
Eramosa River, Guelph, Wellington, Ontario, Canada
January 13, 2009
Size: 12 mm
In detritus. Size measurement excludes cerci.
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Contributed by Stephen Luk on 24 January, 2009 - 3:06pm
Last updated 26 January, 2009 - 11:02pm

Thanks for the ID!
Moved from Stenacron.
… Stephen Luk, 26 January, 2009 - 11:02pm login or register to post comments

Moved
Moved from Stream Mayflies.
… Stephen Luk, 26 January, 2009 - 11:02pm login or register to post comments

Stenacron
This is probably S. interpunctatum. The pointed apices of the gills are characteristics of the genus, and nearly continuous pale dorsal stripes on the abdomen are typical markings for interpunctatum.
… Lloyd Gonzales, 26 January, 2009 - 10:47pm login or register to post comments

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