These are the original articles this re-heat was created from:

- https://www.zmescience.com/science/news-science/magnolias-be...

- https://gardens.si.edu/learn/blog/the-botany-of-magnolias/

Thanks. The first article has more info, e.g. that those beetles are flightless.

But that makes me suspect that they spend a lot of time on one tree, only pollinating that tree, which would be pointless because there is no exchange of genes.