Phylogeny (first most parsimonious tree) and age data for lungfish (Osteichthyes, Sarcopterygii, Dipnoi) taken from Lloyd et al. (2012).
A list containing a tree ($tree) and a matrix of first and last appearances ($ages).
Lloyd, G. T., Wang, S. C. and Brusatte, S. L., 2012. Identifying heterogeneity in rates of morphological evolution: discrete character change in the evolution of lungfish (Sarcopterygii; Dipnoi). Evolution, 66, 330-348.