format
The data are stored in an ASCII file using the NEXUS format which is
read with `read.nexus()'.source
Jones, K. E., Purvis, A., MacLarnon, A., Bininda-Emonds, O. R. P. and
Simmons, N. B. (2002) A phylogenetic supertree of the bats (Mammalia:
Chiroptera). Biological Reviews of the Cambridge Philosophical
Society, 77, 223--259.