Blue-winged Olives
Baetis
Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
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This is an interesting one. Following the keys in Merritt R.W., Cummins, K.W., and Berg, M.B. (2019) and Jacobus et al. (2014), it keys clearly to Ephemerella. Jacobus et al provide a key to species, but some of the characteristics are tricky to interpret without illustrations. If I didn't make any mistakes, this one keys to Ephemerella mucronata, which has not previously been reported any closer to here than Montana and Alberta. The main character seems to fit well: "Abdominal terga with prominent, paired, subparallel, spiculate ridges." Several illustrations or descriptions of this holarctic species from the US and Europe seem to match, including the body length, tarsal claws and denticles, labial palp, and gill shapes. These sources include including Richard Allen's original description of this species in North America under the now-defunct name E. moffatae in Allen RK (1977) and the figures in this description of the species in Italy.
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Millcreek on Jun 18, 2015June 18th, 2015, 1:17 pm EDT
I've put up the larva before but not the pupa. The pupa is commonly found attached at both ends to stones. Occasionally it is found attached by the front end to a large stone. It is usually found in slack water.
The common name is White Miller.
"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein
-Albert Einstein
Taxon on Jun 18, 2015June 18th, 2015, 8:05 pm EDT
Mark,
Wow, what gorgeous pupal photos. Don't recall having previously seen a forked terminal process on a caddisfly. Thanks for sharing.
Wow, what gorgeous pupal photos. Don't recall having previously seen a forked terminal process on a caddisfly. Thanks for sharing.
Millcreek on Jun 18, 2015June 18th, 2015, 8:36 pm EDT
Roger,
Several caddisfly pupae have forked terminal processes. Some that come to mind are various Leptoceridae species, some Uenoidae species and some Odontoceridae. Anyway, it's always fun to find something like that.
Mark
Several caddisfly pupae have forked terminal processes. Some that come to mind are various Leptoceridae species, some Uenoidae species and some Odontoceridae. Anyway, it's always fun to find something like that.
Mark
"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein
-Albert Einstein
Taxon on Jun 18, 2015June 18th, 2015, 11:14 pm EDT
Mark-
Live and learn, I guess! :-)
Live and learn, I guess! :-)
Oldredbarn on Jun 19, 2015June 19th, 2015, 6:38 am EDT
Hey guys...How about walking us through the process after this stage?
I'm looking at the pictures where we see the underside of the insect and was wondering...Does all of this continue to the next stage? What I mean is, the wings here seem short...Does the green abdomen drop off or does that remain with the adult?
Maybe this specimen isn't "that" close to "hatching"...
How about a walk through?
Spence
I'm looking at the pictures where we see the underside of the insect and was wondering...Does all of this continue to the next stage? What I mean is, the wings here seem short...Does the green abdomen drop off or does that remain with the adult?
Maybe this specimen isn't "that" close to "hatching"...
How about a walk through?
Spence
"Even when my best efforts fail it's a satisfying challenge, and that, after all, is the essence of fly fishing." -Chauncy Lively
"Envy not the man who lives beside the river, but the man the river flows through." Joseph T Heywood
"Envy not the man who lives beside the river, but the man the river flows through." Joseph T Heywood
Millcreek on Jun 19, 2015June 19th, 2015, 7:35 am EDT
Spence - The abdomen remains with the adult. The wings are somewhat shortened and folded and stay that way until it becomes an adult. You can get an idea of how it works by looking at the exuvia left behind when it transforms from pupa to adult.
http://www.troutnut.com/topic/8669/Neophylax-larvae-and-pupae
Mark
http://www.troutnut.com/topic/8669/Neophylax-larvae-and-pupae
Mark
"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein
-Albert Einstein
Taxon on Jun 19, 2015June 19th, 2015, 8:54 am EDT
Hi Spence-
I sense that your question relates primarily to the disparity of the wing/abdomen length, between the pupal and adult life stages.
With regard to only that specific issue, the abdomen remains essentially the same length in the adult. However the wings of the adult get "inflated" through their venation at time of emergence, such that the longer fore wings end up reaching well beyond the end of the adult abdomen when in their resting position. Hope this helps.
I sense that your question relates primarily to the disparity of the wing/abdomen length, between the pupal and adult life stages.
With regard to only that specific issue, the abdomen remains essentially the same length in the adult. However the wings of the adult get "inflated" through their venation at time of emergence, such that the longer fore wings end up reaching well beyond the end of the adult abdomen when in their resting position. Hope this helps.
Oldredbarn on Jun 19, 2015June 19th, 2015, 2:04 pm EDT
Yes it does. Thanks to both of you. 13mm is a pretty fair sized caddis.
Spence
Spence
"Even when my best efforts fail it's a satisfying challenge, and that, after all, is the essence of fly fishing." -Chauncy Lively
"Envy not the man who lives beside the river, but the man the river flows through." Joseph T Heywood
"Envy not the man who lives beside the river, but the man the river flows through." Joseph T Heywood
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