ID of casings/shucks?

[WV waver]

Can you identify what bug left these attached to rocks in stream? The worm was a bonus? I have no idea on any.

 

[troutbert]

Probably Isonychia nymph shucks.

Picture from Troutnut.com

Several [autotaxlink id=649 italics=1]Isonychia bicolor[/autotaxlink] [term number=plural]nymphs[/term] had recently crawled out onto these rocks to emerge, leaving behind their telltale [term number=plural]shucks[/term].

www.troutnut.com

 

[WV waver]

Pretty good sized bugs, didn’t think it was a stonefly. Thank you.