You’ve got options:
Mass-level for the next 14ish hours to get above 35 before the new events roll over.
Wait a few months for Quetzelcoatlus to cycle back through. It comes around approximately every 2 months, always at level 35+.
If anyone is close to level 60, I’d get busy leveling. Hyneria hasn’t been available since its inaugural unlock back in March, and that after being released, but not unlockable, for about a year prior. Geosaurus, on the other hand cycles through for upper-level players ever 2-3 months