Phylogeny (162 most parsimonious trees) and age data for Asaphidae genera (Trilobita, Asaphida) taken from Bell and Braddy (2012).
A list containing 162 trees ($tree) and a matrix of first and last appearances ($ages).
Bell, M. A. and Braddy, S. J., 2012, Cope<U+2019>s rule in the Ordovician trilobite Family Asaphidae (Order Asaphida): patterns across multiple most parsimonious trees: Historical Biology, 24, 223-230.