My parents and I were working on identifying a liverwort we found, examining it closely with a hand lens, when I saw some herbivory that looked suspiciously like mining. Sure enough...

Host plant appears to be umbrella liverwort, Marchantia polymorpha

The thallus shown here has two visible "lobes" (note where the central, darker rib of the thallus forks, like a leaf vein branching into two smaller veins). Most of the mining visible here is in the lobe in the top half of the image. Larva shown in other images of this series is occupying the lobe in the bottom half of the image, though it's hard to see from this viewing angle.

Ruler units are sixteenths of an inch

Indoor rearing in progress

Larva from another thallus:


First adult, Thanksgiving Day 2017


Larva colonizing fresh thallus growth (indoors), December 2017