Midpoint rooted maximum likelihood phylogram of nucleoprotein (NP) amino acid sequences from filoviruses and related mammalian genomic and EST sequences showing the paraphyly of mammals. Branches with more than two sequences and strong support (at least 90 for bootstrap or 95 for Bayesian posterior probability) have values shown above the branch (in the order of approximate likelihood ratio tests, Bayesian Posterior Probabilities, and non-parametric bootstrap values). Parentheses contain GenBank Accession numbers and are followed by the range of the sequence for nucleotide submissions. Red filled branches indicate clades of viruses (Mononegavirales), black filled branches indicate mammalian sequences, and blue filled lines indicate expressed sequence tags. Geographic origins are given in parentheses adjacent to species names. Shaded cartoons indicate outlines of species represented in the analysis.