The update showed that the Titanoboa's new egg class is "Superior" (large egg rather than special), the same as Argent/Allo/ect, and added fertilized Wyvern and Rock Drake eggs to the Special egg pool.

However, since the only "Special" eggs are now Wyverns, Rock Drakes, and Golden Hesperonis eggs, transferring in items or creatures is required in order to obtain extraordinary kibble on that map.

Wyverns and Rock Drakes don't spawn in their non-corrupt forms so they're out - and Hesperonis do spawn...in caves, where they are untameable, like the Mantids and Onycs. You can "Feed" them a fish but will gain no taming progress. Tested in both the ice and desert caves, in multiple spawn locations.

You may think you could still try and get golden eggs from the untameable cave hesperonis, however they don't really seem to react to the presence of fish and don't wander around (being cave creatures), meaning getting eggs may not be possible.

I've yet to hear of anyone finding Hesperonis outside caves, so i'm guessing this may be an oversight not accounted for when removing boas from the pool.