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Agromyzid ex Hydrophyllum virginianum - Phytomyza confusa

Agromyzid ex Hydrophyllum virginianum - Phytomyza confusa
Carroll County, Iowa, USA
Just wanted to double-check that no one can think of another possible ID for this plant.

Images of this individual: tag all
Phytomyza confusa - male Phytomyza confusa - male Agromyzid ex Hydrophyllum virginianum - Phytomyza confusa


Another possibility would be Geum canadense
but the basal leaves are usually not so true green. It will be interesting to see what John Pearson thinks. Do you have any shots that show more of the plant? We would expect Hydrophyllum to have sharper teeth.

This is the only whole-leaf shot I got
At the time, I thought it was Hydrophyllum, so I just took this one shot to remind me where the leaf mines came from. I think it was just a patch of basically similar basal leaves. The dull teeth are the reason I was doubting myself after the fact. This was growing at the base of a bur oak in the middle of a mowed park, so habitat doesn't help much. John Pearson agreed with H. virginianum (he commented on plant photos I posted to Flickr); I just wonder if there's some weedy plant we're not thinking of. Possibly when Owen Lonsdale examines the fly, the fly ID will inform the plant ID.

Thanks for reposting this, I recently struggled over a similar-looking vegetative plant that turned out to be a Ranunculus. How about R. fascicularis?

Interesting thought
There certainly are plenty of Ranunculus-mining agromyzids.

Ranunculus seems good...
Owen has identified the fly as a new species in a group that is associated with Ranunculaceae. Now I'm newly motivated to nail down the host ID! R. fascicularis is the best match I've seen so far...

The plot thickens!
I have now reared a closely related species (also undescribed) from a plant that was unquestionably Hydrophyllum virginianum, which suddenly makes Hydrophyllum seem plausible. Of the nine described species in the aquilegiae group, eight have hosts exclusively in Ranunculaceae, and the host of the ninth is unknown. So this Hydrophyllum business is a strange development.

Moved from Leaf Miner Flies.

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