Host appears to be Asimina triloba - Phyllocnistis liriodendronella

I've found these in my yard in Massachusetts...

...where mines are common on the magnolias and tuliptrees I have planted, and I have no doubt that P. liriodendronella is responsible. There are a number of other examples on BugGuide and iNaturalist, always aborted, so this does not appear to be a suitable host.
https://bugguide.net/node/view/1695447
https://www.inaturalist.org/observations/83593960
https://www.inaturalist.org/observations/84836408
https://www.inaturalist.org/observations/86227886
https://www.inaturalist.org/observations/87869395
https://www.inaturalist.org/observations/94216787
https://www.inaturalist.org/observations/102901774
https://www.inaturalist.org/observations/132305602

… Charley Eiseman, 7 March, 2024 - 9:19am

Moved

Moved from Phyllocnistis.

… Charley Eiseman, 7 March, 2024 - 9:19am

Moved

Moved from Unidentified Leaf Mines.

Since pawpaw is in the order Magnoliales, my best guess is that this is P. liriodendronella/magnoliella on the "wrong" host. It would be interesting to know if you find any completed mines.

… Charley Eiseman, 25 August, 2016 - 4:48pm

Host plant

Can you post photos of whole leaves and any other identifying features for the host plant? No leaf mines are known from pawpaw.

… Charley Eiseman, 24 August, 2016 - 9:40pm

Is there any chance this is a

Is there any chance this is a snail feeding trail or some similar sign, rather than a leaf mine?

… Even Dankowicz, 25 August, 2016 - 4:11pm

No, definitely a leaf mine

There is a distinct central frass line in some places. This sort of epidermal mine is characteristic of Gracillariidae--it could be a Phyllocnistis, or maybe an aborted mine of some other genus that would ultimately make a blotch. I sure would like to see some more examples!

… Charley Eiseman, 25 August, 2016 - 4:42pm

Host image uploaded.

… Even Dankowicz, 25 August, 2016 - 8:49am