Nils Kolling et al. just released the following publication in Plos Biology :
https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.3001566
Here’s an interview of Nils Kolling and Jacqueline Scholl linked to this work:
And two commentaries related to the study:
https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.3000693
https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.3001611