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> > Ephemerella maculata



Millcreek has attached these 6 pictures. The message is below.
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Showing sternites. Coloration common to all specimens.
Showing sternites. Coloration common to all specimens.
View Full SizeView Full Size (1.2X larger)
Length approximately 6 mm (excluding cerci).
Length approximately 6 mm (excluding cerci).
View Full SizeView Full Size (1.2X larger)
Length approximately 6 mm (excluding cerci).
Length approximately 6 mm (excluding cerci).
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Length approximately 8 mm (excluding cerci).
Length approximately 8 mm (excluding cerci).
View Full SizeView Full Size (1.6X larger)
Length approximately 8 mm (excluding cerci).
Length approximately 8 mm (excluding cerci).
View Full SizeView Full Size (1.4X larger)
Length approximately 8 mm (excluding cerci).
Length approximately 8 mm (excluding cerci).
MillcreekApril 10th, 2015, 11:22 am
Healdsburg, CA

Posts: 344
Common in the Russian River. Usually found in small gravel, in shallow water. The nymphs were keyed out to family using Merritt, Cummins and Berg (2008) and to species using Allen and Edmunds "A Revision of the Genus Ephemerella (Ephemeroptera; Ephemerellidae) VII. The Subgenus Ephemerella in North America".
http://www.ephemeroptera-galactica.com/pubs/pub_a/puballenr1965p244.pdf
These nymphs show considerable variation in coloring but maintain the same body shape and typical coloring of the sternites.
"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein
TroutnutApril 11th, 2015, 3:12 pm
Administrator
Bellevue, WA

Posts: 2592
Excellent photos!
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
MillcreekApril 12th, 2015, 10:26 am
Healdsburg, CA

Posts: 344
Thanks, glad you enjoyed them.
"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein
PaulRobertsApril 12th, 2015, 9:38 pm
Colorado

Posts: 1776
Gorgeous critter.

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