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.
Option 1 | Option 2 |
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Anal claws obtusely curved (sf 19.389) | Anal claws curved approximately 90º (sf 19.392) |
Capture net loosely constructed, flat, spider-like, with funnel-shaped silken retreat in middle, surrounded by maze of silken threads Widespread except not Southwest | |
Remaining genera: Cernotina and Holocentropus | |
1 Example SpecimenThis one seems to tentatively key to Holocentropus, although I can't make out the anal spines in Couplet 7 of the Key to Genera of Polycentropodidae Larvae nor the dark bands in Couplet 4 of the Key to Genera of Polycentropodidae Larvae, making me wonder if I went wrong somewhere in keying it out. I don't see where that could have happened, though. It might also be that it's a very immature larva and doesn't possess all the identifying characteristics in the key yet. If Holocentropus is correct, then Holocentropus flavus and Holocentropus interruptus are the two likely possibilities based on range, but I was not able to find a description of their larvae.
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Plectrocnemia No further information about this genus is available on Troutnut.com at this time. | Go to Couplet 7 |