(When) will we find apatosaurines outside of North America?

My happy place: in the Dinosaur Journey collections, surrounded by Apatosaurus vertebrae. Hot on the heels of the discovery of Diplodocus in Spain (Sánchez-Fenollosa et al. 2026), I am publicly committing to this prediction. I think it’s inevitable that someone will find an apatosaurine in Europe, for the following reasons: Apatosaurines were around for a decent chunk of time, from pretty low in the Salt Wash to the very top of the Morrison, and that’s just counting the record we have. That may seem short on the scale of the Mesozoic, but Morrison deposition went on for three times as long as the Great American Interchange to date (2.7Ma), so biogeographically it’s an eternity. Related: we don’t have good morphologically transitional apatosaurines yet — or at least, if we have them, no-one has IDed them as such — and IMHO apatosaurines are too weird to have evolved from other diplodocids in one saltatory leap. So I expect there are more lurking out there somewhere/somewhen. So many…