Mayfly Species Eurylophella temporalis (Chocolate Dun)
Taxonomic Navigation -?-
Kingdom Animalia (Animals)
» Phylum Arthropoda (Arthropods)
» Class Insecta (Insects)
» Order Ephemeroptera (Mayflies)
» Family Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs)
» Genus Eurylophella (Chocolate Duns)
» Species temporalis (Chocolate Dun)
Common Name
| Match | Common Name |
 | Chocolate Dun |
Where & When
Regions: East, Midwest
Time Of Year (?): Mid-May through early June, perhaps later
Preferred Waters: Lakes and large streams
This widespread Eastern and Midwestern species is not really mentioned in fly fishing literature. The Leonards say in Mayflies of Michigan Trout Streams that it is found in lakes and small streams, though the specimens I collected in northern Wisconsin came from the very small headwaters of a small stream.Time Of Year (?): Mid-May through early June, perhaps later
Preferred Waters: Lakes and large streams
Since I have collected the nymphs in early June without the darkened wing pads (Wing pad: A protrusion from the thorax of an insect nymph which holds the developing wings. Black wing pads usually indicate that the nymph is nearly ready to emerge into an adult.) that would indicate an impending hatch, I assume they emerge later than the dates I've found in books.
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1 Mayfly Specimen in the Species Eurylophella temporalis:
Eurylophella temporalis (Chocolate Dun) Mayfly Nymph
View 9 Pictures
View 9 PicturesRegion: Upper Midwest
Collected Jun 5, 2005
Added May 25, 2006
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