Phylogenetic tree highlighting the position of Anaerococcus pacaensis strain 9403502T relative to other type strains within the genus Anaerococcus. GenBank accession numbers are indicated in parentheses. Sequences were aligned using CLUSTALW, and phylogenetic inferences obtained using the maximum-likelihood method within the MEGA 4 software . Numbers at the nodes are bootstrap values obtained by repeating the analysis 500 times the analysis to generate a majority consensus tree. Clostridium butyricum was used as outgroup. The scale bar represents a 2% nucleotide sequence divergence.