Table 3 Putative viral genomes isolated from the metagenomes. crAssphage and 24 novel putative virus groups (namely ph1 to ph24, sorted by the number of isolated genomes (bins) from high to low), as well as 21 singleton putative viral bins are listed. Cell values represent the number of bins per sample. The background color depth is proportional to the total relative abundance of the genome(s). The size of a group is calculated as one if there is one or more complete (circular) genomes, using the median of their sizes; two if not, using the maximum size of the bins with least number of contigs