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> Callibaetis sp.

Millcreek	April 28th, 2015, 11:20 pm
Healdsburg, CA Posts: 356	These are common in the Russian River. They're usually found in cutoff pools. The pools have stagnant water with large algal growths and temperatures are higher than the river itself. They're probably Callibaetis pictus since the adults are common at the river right now.
PaulRoberts	April 29th, 2015, 7:29 pm
Colorado Posts: 1776	Pretty critter. They look a bit like Siphlonurus. I wonder how closely related the two might be?
Millcreek	April 29th, 2015, 10:52 pm
Healdsburg, CA Posts: 356	Probably pretty closely related. Callibaetis belongs in Baetidae while Siphlonurus belongs in Metretopodidae generally a limb below Baetidae on a tree of life. Can be seen in common names as well: Small Minnow Mayflys for Baetidae and Primitive Minnow Mayflys for Siphlonurus. Easiest field ID is Siphlonurus has short antennae (about head length) while Callibaetis has long antennae (about 3 or 4 times length of head).
Taxon	April 30th, 2015, 12:42 am
Site Editor Royse City, TX Posts: 1348	Hi Mark- while Siphlonurus belongs in Metretopodidae I believe Siphlonurus is in family Siphlonuridae, whereas Siphloplecton is in family Metretopodidae.
	Best regards, Roger Rohrbeck www.FlyfishingEntomology.com
Millcreek	April 30th, 2015, 12:56 am
Healdsburg, CA Posts: 356	Roger- I believe Siphlonurus is in family Siphlonuridae, whereas Siphloplecton is in family Metretopodidae. You're right, my mistake.
Taxon	April 30th, 2015, 1:59 am
Site Editor Royse City, TX Posts: 1348	No problem, Mark. Many viewers would label me as a/r for even having mentioned it :-)
	Best regards, Roger Rohrbeck www.FlyfishingEntomology.com
PaulRoberts	April 30th, 2015, 5:54 am
Colorado Posts: 1776	Definitely mention/correct where needed, Roger. That's what makes this site so good.

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