Oak Leaf Mine ID Request - Coptodisca

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Moved from Unidentified Leaf Mines.
Very interesting. This is almost certainly an undescribed species. The only reference I have found to an eastern Coptodisca on oak is an offhand mention in Forbes' (1923) Lepidoptera of NY & Neighboring States that a "rather distinct form occurs on white oak." Any chance you can figure out what kind of oak this was? I'd also be curious to know the approximate size of this mine. The oak Coptodisca mines I've seen in California are tiny. In CA, there is a single described species on live oaks, and there are supposed to be 4-5 undescribed species on other oaks.

… Charley Eiseman, 13 February, 2015 - 5:36pm

P.S.

I hope I didn't incorrectly ID the plant.

… Thomas Wilson of Armistead Gardens in Baltimore City, 13 February, 2015 - 5:53pm

Toothed leaf margin is suspicious

Any chance this was actually a huge hickory leaflet?

… Charley Eiseman, 13 February, 2015 - 6:06pm

Chinquapin Oaks

have this but again I am not able to say for sure. (Especially since this leaf is not densely hairy underneath.)

See:

http://www.carolinanature.com/trees/qumu.html

"In the White Oak group, Chinkapin Oak can quickly be told apart from Chestnut Oak and Swamp Chestnut Oak by the pointed teeth on the leaves."

… Thomas Wilson of Armistead Gardens in Baltimore City, 13 February, 2015 - 6:13pm

Yes--

so I sent an email to my local plant guy to get his feedback. I will let you know if I was correct, or mistaken (for which I pre-emptively apologize profusely.)

… Thomas Wilson of Armistead Gardens in Baltimore City, 13 February, 2015 - 6:09pm

Quite large--

this one was (relatively-speaking.) I will add less-cropped photos.

… Thomas Wilson of Armistead Gardens in Baltimore City, 13 February, 2015 - 5:41pm