Troutnut.com Fly Fishing for Trout Home
User Password
or register.
Scientific name search:

> > Fallceon spp.

Millcreek has attached these 20 pictures to aid in identification. The message is below.
View Full SizeView Full Size (1.2X larger)
Fallceon quilleri nymph. Mature female. 7 mm (excluding cerci). Collected March 28, 2014. Dark variant.
Fallceon quilleri nymph. Mature female. 7 mm (excluding cerci). Collected March 28, 2014. Dark variant.
View Full SizeView Full Size (1.2X larger)
Fallceon quilleri nymph. Immature male. 6 mm (excluding cerci). Collected October 29, 2014. Light variant.
Fallceon quilleri nymph. Immature male. 6 mm (excluding cerci). Collected October 29, 2014. Light variant.
View Full SizeView Full Size (1.6X larger)
Fallceon quilleri nymph. Mature female. 7 mm (excluding cerci). Collected March 28, 2014. Light variant.
Fallceon quilleri nymph. Mature female. 7 mm (excluding cerci). Collected March 28, 2014. Light variant.
View Full SizeView Full Size (1.5X larger)
Fallceon quilleri nymphs. Immature females. 6 mm (excluding cerci). Collected October 5, 2014.
Fallceon quilleri nymphs. Immature females. 6 mm (excluding cerci). Collected October 5, 2014.
View Full SizeView Full Size (1.5X larger)
Fallceon quilleri nymph. Mature male. 5.5 mm (excluding cerci). Collected November 11, 2013. Dark
variant.
Fallceon quilleri nymph. Mature male. 5.5 mm (excluding cerci). Collected November 11, 2013. Dark
variant.
View Full SizeView Full Size (1.2X larger)
Fallceon quilleri nymph. Mature female. 6.5 mm (excluding cerci). Collected November 1, 2014. Dark variant.
Fallceon quilleri nymph. Mature female. 6.5 mm (excluding cerci). Collected November 1, 2014. Dark variant.
View Full SizeView Full Size (1.1X larger)
Fallceon thermophilos nymph. Mature male. 5.5 mm (excluding cerci). Collected July 15, 2014.
Fallceon thermophilos nymph. Mature male. 5.5 mm (excluding cerci). Collected July 15, 2014.
Shown Full Size
Fallceon thermophilos nymph. Mature male. 5.5 mm (excluding cerci). Collected October 7, 2014.
Fallceon thermophilos nymph. Mature male. 5.5 mm (excluding cerci). Collected October 7, 2014.
View Full SizeView Full Size (1.5X larger)
Fallceon thermophilos nymph. Mature female. 5.5 mm (excluding cerci). Collected April 21, 2014.
Fallceon thermophilos nymph. Mature female. 5.5 mm (excluding cerci). Collected April 21, 2014.
View Full SizeView Full Size (3.2X larger)
Fallceon thermophilos nymphs. Mature females. 5 - 5.5 mm (excluding cerci). Collected April 21, 2014.
Fallceon thermophilos nymphs. Mature females. 5 - 5.5 mm (excluding cerci). Collected April 21, 2014.
View Full SizeView Full Size (2.3X larger)
Female Fallceon thermophilos and male Fallceon sp.1 nymph. Collected April 21, 2014.
Female Fallceon thermophilos and male Fallceon sp.1 nymph. Collected April 21, 2014.
View Full SizeView Full Size (2.1X larger)
Fallceon thermophilos nymphs. Mature male and female with female Fallceon quilleri nymph. Collected November 7, 2014.
Fallceon thermophilos nymphs. Mature male and female with female Fallceon quilleri nymph. Collected November 7, 2014.
View Full SizeView Full Size (1.1X larger)
Fallceon sp.1. Male nymph. 5 mm (excluding cerci). Collected October 15, 2014.
Fallceon sp.1. Male nymph. 5 mm (excluding cerci). Collected October 15, 2014.
View Full SizeView Full Size (1.2X larger)
Fallceon sp.1. Male nymph. 5.5 mm (excluding cerci). Collected August 29, 2014.
Fallceon sp.1. Male nymph. 5.5 mm (excluding cerci). Collected August 29, 2014.
View Full SizeView Full Size (1.8X larger)
Fallceon sp.1. and Fallceon thermophilos male nymphs. Collected August 29, 2014.
Fallceon sp.1. and Fallceon thermophilos male nymphs. Collected August 29, 2014.
Shown Full Size
Fallceon sp.1. Male nymph. 5.5 mm (excluding cerci). Collected October 27, 2014.
Fallceon sp.1. Male nymph. 5.5 mm (excluding cerci). Collected October 27, 2014.
View Full SizeView Full Size (1.4X larger)
Fallceon sp.1. Male nymph. 5 mm (excluding cerci). Collected August 29, 2014.
Fallceon sp.1. Male nymph. 5 mm (excluding cerci). Collected August 29, 2014.
Shown Full Size
Fallceon sp.1. Male nymph. 5 mm (excluding cerci). Collected September 25, 2014.
Fallceon sp.1. Male nymph. 5 mm (excluding cerci). Collected September 25, 2014.
View Full SizeView Full Size (2.3X larger)
Fallceon sp.1. and Fallceon quilleri male nymphs. Collected November 1, 2014.
Fallceon sp.1. and Fallceon quilleri male nymphs. Collected November 1, 2014.
View Full SizeView Full Size (1.1X larger)
Female Fallceon sp.1 nymph. 5 mm. Collected November 9, 2014.
Female Fallceon sp.1 nymph. 5 mm. Collected November 9, 2014.
MillcreekNovember 11th, 2014, 5:59 pm
Healdsburg, CA

Posts: 326
A while ago I did a post on what I thought were Baetis species nymphs. They turned out to be species of Fallceon. I got an email from Jeff Webb who thought one of the species might be Fallceon thermophilos based on some photos he had seen that Pat Randolph had taken. Got in touch with Pat and he sent a photo of a Fallceon thermophilos nymph and adult to me. The photo of the nymph matches the ones I had collected. Pat had collected the nymphs a few years earlier about half a mile downstream from where I got mine. Also found a partial description of the nymphs in an article by McCafferty, Meyer, Randolph and Webb "Evaluation of mayfly species originally described as Baetis Leach (Ephemeroptera: Baetidae) from California" (2008). The description of the larvae is on page 587. Link to article is http://www.ephemeroptera-galactica.com/pubs/pub_m/pubmccaffertyw2008p577.pdf

One of the other nymphs appears to be Fallceon quilleri. I found descriptions of the nymph in an article by Lugo-Ortiz, McCafferty and Waltz "Contribution to the taxonomy of the Panamerican genus Fallceon (Ephemeroptera: Baetidae)" (1994). http://www.ephemeroptera-galactica.com/pubs/pub_l/publugoc1994p460.pdf Morihara and McCafferty also give a description of the nymphs of Fallceon quilleri (as Baetis qulleri, a synonym) in "The Baetis larvae of North America (Ephemeroptera: Baetidae)" (1979). http://www.ephemeroptera-galactica.com/pubs/pub_m/pubmoriharad1979p139.pdf

As far as the third Fallceon nymph in the photos I have no idea what the species could be. Apparently there are unidentified species of Fallceon in California and this may be one of them. for now I'll just call it Fallceon sp.1.

I don't know how I misidentified the nymphs to Baetis in the first place (probably just butt stupid) but hopefully this ID is correct. I've removed the photos from the original post and placed them here along with some extra photos.
"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein
KonchuNovember 14th, 2014, 5:52 pm
Site Editor
Indiana

Posts: 496
Really great photos. Thanks for sharing them.
MillcreekNovember 14th, 2014, 9:32 pm
Healdsburg, CA

Posts: 326
Luke -
Really great photos. Thanks for sharing them.

Thanks, you're welcome. As an aside, what is the mayfly nymph in the photo you have to the side of your posts?
"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein
KonchuNovember 21st, 2014, 6:54 pm
Site Editor
Indiana

Posts: 496
It is a Teloganodes (Teloganodidae) species from Sri Lanka.
MillcreekNovember 21st, 2014, 7:35 pm
Healdsburg, CA

Posts: 326
Not Teloganodes jacobusi by any chance?:)
"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein

Quick Reply

You have to be logged in to post on the forum. It's this easy:
Username:          Email:

Password:    Confirm Password:

I am at least 13 years old and agree to the rules.

Related Discussions

TitleRepliesLast Reply
More Baetis nymphs
(2 more)

In the Identify This! Board by Millcreek
0
Acentrella insignificans nymphs
(1 more)

In the Photography Board by Millcreek
0
Baetis alius
In the Identify This! Board by Millcreek
0
Re: Paraleptophlebia helena
(1 more)

In the Photography Board by Millcreek
13Aug 31, 2014
by Millcreek
Re: Spinner?
In Male Neoleptophlebia heteronea Mayfly Adult by Martinlf
1May 19, 2012
by Taxon
Re: Baetis spp.
In the Identify This! Board by Millcreek
16Oct 8, 2014
by Millcreek
Acerpenna?
In Male Baetis Mayfly Dun by Entoman
0
Re: Ironodes sp.
(1 more)

In the Identify This! Board by Millcreek
2Nov 21, 2014
by Millcreek
Re: Fallceon species mating
In General Discussion by Millcreek
7Dec 1, 2015
by Millcreek
Re: Christmas nymphs and larvae
(6 more)

In the Photography Board by Millcreek
1Jan 2, 2018
by Jmd123
Most Recent Posts
Brand new member, fly fisherman, and boat coveter
In General Discussion by Stickstring
Re: Hesperoperla or Calineuria
In Male Calineuria californica Stonefly Adult by Millcreek
Quick evening trip to the South Fork Snoqualmie
In Site Updates by Troutnut
Re: Fishing with My Nephew: Sixth Annual Trip
In Fishing Reports by Martinlf (Partsman replied)
Re: Spinadis simplex
In Female Heptageniidae Mayfly Dun by Taxon (Troutnut replied)
Re: Neoleptophlebia
In Neoleptophlebia Mayfly Dun by Millcreek (Troutnut replied)
Neoleptophlebia
In Neoleptophlebia Mayfly Nymph by Millcreek
Neoleptoptphlebia
In Neoleptophlebia Mayfly Nymph by Millcreek
Neoleptophlebia
In Neoleptophlebia Mayfly Nymph by Millcreek
Hesperoperla pacifica
In Hesperoperla pacifica Stonefly Nymph by Millcreek