Hollow fossil not listed in currency exchange market

As the title says, look in the delve tab of currency exchange, there is no listing for hollow fossils. Type in "hollow" in the search bar, no results. Ctrl+left-click a hollow fossil with the exchange tab open and it does not populate into the "I have" field. I have not checked every fossil so this may also be an issue with others.

Edit: Also checked tangled fossil, and it does not show up either. I would assume all the special fossils are not valid within the exchange market.

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sobier wrote:

+1

The patch scheduled for this week stated adding missing fossils. We'll see if any are still missing after the patch.