Beautiful Stone

OK Lloyd

I'll be on the look out for more of these adult stoneflies.

… tom murray, 8 April, 2009 - 5:55pm

Subfamilies?

I noticed that some of the perlodids were being grouped under subfamilies. Is that not being done with others? If the Perlinae subfamily has yet to be established, I recently commented on a very similar specimen to yours and another that could also be placed there.

… Lloyd Gonzales, 8 April, 2009 - 6:04pm

Subfamilies

I see that Perlodid is the only family with subfamilies. The general rule is not to make too many levels in the guide, making it easier to navigate. You might want to ask Robin McLeod from your second link, since she knows more about taxonomy and the way bugguide operates than I do.

… tom murray, 8 April, 2009 - 6:49pm

Sorry, Tom...

but I'd like you to back this one up to subfamily Perlinae. Although I'm convinced that it is either Paragnetina immarginata or Agnetina capitata, the adults can be so similar in overall appearance that I've been going back and forth about which one this is.

If you find something similar in late May or June/July, try to get a shot of the male genital hooks (dorsal view of the tip of the abdomen) or the female subgenital plate (ventral view of the 8th segment). They are easy to identify that way. The nymphs are superficially similar, but unlike the adults, they are much easier to distinguish in a dorsal shot.

… Lloyd Gonzales, 8 April, 2009 - 2:52pm

Beautiful Stone

This one does look a little nicer than the Embossed Stone:-)

… tom murray, 3 December, 2008 - 6:41pm

Oops...

I just noticed that I left the "r" out of my first spelling of "immarginata." Corrected now.

… Lloyd Gonzales, 3 December, 2008 - 7:10pm

Beautiful Stone

I believe this is probably Paragnetina immarginata. Although darker and lighter specimens can be found in both species, the nymph and adult of P. immarginata are usually much more brightly colored and distinctively marked than its somber relative, P. media. That is probably the source of its rather recent common name, "Beautiful Stone."

… Lloyd Gonzales, 3 December, 2008 - 6:36pm

Moved

Moved from Stoneflies.

… tom murray, 2 May, 2008 - 5:37pm

Perlidae

Looks like.

… Donald S. Chandler, 2 May, 2008 - 12:14pm