Supplementary Data 1 - R output of occurrences used in final analysis
2018-04-10T03:30:23Z (GMT) by
R output of specimen occurrences used in the final analysis. This includes occurrences from the middle Permian remaining after pruning of specimens with unacceptably high uncertainty surrounding their stratigraphic provenance. It also includes occurrence data for the late Permian Tropidostoma AZ.