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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » "Nematocera" (Non-Brachycera) » Gnats, Gall Midges, and March Flies (Bibionomorpha) » Fungus Gnats and Gall Midges (Sciaroidea) » Gall Midges and Wood Midges (Cecidomyiidae) » Gall Midges (Cecidomyiinae) » Lasiopteridi » Oligotrophini » Rhopalomyia » Rhopalomyia pedicellata
Photo#302397
What is this? More goldenrod fauna - Rhopalomyia pedicellata
Copyright © 2009 Beatriz Moisset

What is this? More goldenrod fauna - Rhopalomyia pedicellata
Pennypack Restoration Trust, Montgomery County, Pennsylvania, USA
July 10, 2009
Size: 4 mm
Another kind of gall of goldenrod. So different from all the others; it is small, supported by a stem and grows from a leaf. Is there no end to the variety of galls of goldenrod?
There is a pupa inside, very similar to the other pupae, but the gall is entirely different.

More on goldenrod galls fauna.
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What is this? More goldenrod fauna - Rhopalomyia pedicellata What is this? More goldenrod fauna - Rhopalomyia pedicellata What is this? More goldenrod fauna - Rhopalomyia pedicellata What is this? More goldenrod fauna - Rhopalomyia pedicellata
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Contributed by Beatriz Moisset on 11 July, 2009 - 1:30pm
Last updated 14 January, 2019 - 1:45pm

Did this particular one make
Did this particular one make it to the adult stage, or was it parasitized? Thank you so much!
… Even Dankowicz, 11 April, 2019 - 2:24pm login or register to post comments

 
No luck
It didn't get any further, and I don't remember being able to raise this species to completion.
… Beatriz Moisset, 11 April, 2019 - 3:44pm login or register to post comments

Wow!
Now that's a distinctive gall! It's Rhopalomyia pedicellata, which apparently is only found on grass-leaved goldenrod (Euthamia graminifolia). Is that what this was? ...The pupa looks like a midge pupa to me, incidentally.
… Charley Eiseman, 11 July, 2009 - 8:25pm login or register to post comments

 
Aha!
So, I was wrong about the pupa. So much to learn! I don't know much about goldenrod species and not being in bloom makes it harder to ID them, although I can see that some look quite different. I will try to look harder and to take more pictures of the plant in the future.
Goldenrods are such a gold mine of bugs! I wish that more people started taking pictures of their fauna. I haven't started to scratch the surface considering that Richard B. Root counted 103 species of herbivores of Solidago altissima, not counting flower visitors. There are over 80 species of flower visitors in Solidago canadensis. And then who knows how many parasites and predators!
… Beatriz Moisset, 12 July, 2009 - 9:07am login or register to post comments

 
Goldenrod fauna
I'd love to see an article devoted to collecting images and information about all the goldenrod associates. (Hint, hint!)
… Charley Eiseman, 12 July, 2009 - 9:49am login or register to post comments

 
Ha, ha!
Why do you think that I have been gathering those links? Now, when will I find the time?
So far there is an easy way to find the associated images by searching: Goldenrod fauna
… Beatriz Moisset, 12 July, 2009 - 11:26am login or register to post comments

 
When you get one started...
I'll add on other species as I think of them. I was thinking of doing something similar with milkweed fauna. The possibilities, of course, are endless. Projects for winter, I suppose!
… Charley Eiseman, 12 July, 2009 - 11:32am login or register to post comments

 
The milkweed zoo
In that case check the book Milkweed, Monarchs and More and these pages in Flickr 1 and 2. Every year I lead a walk on "The Milkweed Zoo" at a nature center nearby.
… Beatriz Moisset, 12 July, 2009 - 12:03pm login or register to post comments

 
Great! One less thing to worry about...
I just ordered the book. Nice Flickr pages too.
… Charley Eiseman, 12 July, 2009 - 12:19pm login or register to post comments

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