- We thank Jan Mareš for his help in curating the Cyanobacteria

- Phylum names have been updated following the valid publication of 42 names in IJSEM 
 (https://pubmed.ncbi.nlm.nih.gov/34694987/), including Bacillota and Pseudomonadota

- Fixed issue with SSU files where sequences started 2 bp after correct start and stopped 
  1 bp after correct end of sequence. Thanks to CX for bringing this issue to our attention:
  https://forum.gtdb.ecogenomic.org/t/16s-23s-and-ssu-all-r207/307/2
  
- SSU files now provide sequences in their 5' to 3' orientation

- Changed QC criterion for number of contigs from 1000 to 2000 in order to better align the
  GTDB criteria with RefSeq (https://www.ncbi.nlm.nih.gov/assembly/help/anomnotrefseq/)
  
- Changed QC criterion to use ar53 instead of ar122 marker set. The impact of this change was 
  evaluated on the 353,569 genomes (~6,100 archaeal) considered for GTDB R207:
  -- only 1 additional genome passed QC
  -- only 21 additional genomes failed QC which included the following species representatives:
    -- s__Methanoregula sp002497485
    -- s__Methanobrevibacter_A sp017634055
    -- s__Methanosphaera sp003266165
    -- s__MGIIa-L1 sp002688825
    -- s__MGIIb-N2 sp002503665
    -- s__MGIIa-L2 sp002692685
    -- s__MGIIb-O3 sp002730445
    -- s__DTDI01 sp011334935
    -- s__Methanosphaera sp017652595
    -- s__Nitrosopelagicus sp902606945
    -- s__Methanolinea sp002501965