Figure 2.

Phylogenetic tree of coronavirus sequences from Sri Lankan M. fuliginosus bats (given in red) and R. leschenaultii bats (given in blue) and other reference sequences of different α- and β-CoVs. The tree is divided into the two groups of α- and β-CoVs. In addition, the γ-CoV avian infectious bronchitis virus (NC_001451, marked with an asterisk) was included as outgroup for the calculation. The phylogenetic tree was calculated with Bayesian algorithm, and 5 mio trees were calculated with a subsampling frequency of 25 and a burn-in of 50%. Substitution model HKY85 was selected with a gamma-distributed rate variation. Branch label values for the 27 bat CoV sequences that form a joint clade are not displayed in the tree; their posterior probability values range between 0.52 and 1.