Phylogenetic trees based on the nucleotide sequences of the RdRp (A) and capsid (B) genes of the AstVs identified in this study and representative strains from GenBank. Trees were constructed using the GTR+G+I nucleotide substitution model using RAxML, with the autoMRE flag, which enables a posteriori bootstrapping analysis. Only bootstrap values greater than 70% are shown. Bars indicate nucleotide substitutions per site. Red, HAstVs identified in this study; blue, bat AstV strain from the same region in Cameroon; ^, proposed novel astrovirus species.