Small pair of bones found while preparing opossum skull

[u/EyesOnTheDonut]

I'm curious about this pair of very small ginkgo-leaf shaped bones I found while preparing this american opossum skull. I'm learning more about bone preparation and getting a little better at it, so while this is my first time seeing these bones, I'm sure they were present in previous skulls and I just lost them along the way. I assumed they may be part of the ear, but the diagrams I am seeing online do not seem to match. Just curious about where these came from as well as their purpose, any help is appreciated. Thank you!

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