Release 78 Statistics

Rank Bacterial Taxa Archaeal Taxa
Phylum 113 9
Class 231 24
Order 648 69
Family 1,425 137
Genus 4,539 357
Species 7,594 435

Comparison of taxonomic ranks between GTDB and NCBI

The following graph represents difference between the bacterial NCBI and GTDB taxonomies. This comparison has been run on the set of NCBI dereplicated genomes used to generate the canonical bacterial GTDB tree (15,222 genomes). For each rank, the green bar represents the set of genomes with identical taxa between GTDB and NCBI, the orange bar represents the set of genomes with an undefined NCBI rank that has been resolved in GTDB, and the red bar represents taxa that differ between NCBI and GTDB.

Relative evolutionary divergence

The following graphs show the relative evolutionary divergence (RED) of taxa at each taxonomic rank (0=phylum, 1=class, ..., 5=species). RED values provide an operational approximation of relative time with extant taxa existing in the present (RED=1), the last common ancestor occurring at a fixed time in the past (RED=0), and internal nodes being linearly interpolated between these values according to lineage-specific rates of evolution. The grey bars indicate the 10th, 50th, and 90th percentile of the RED distribution at each rank. RED intervals for normalizing taxonomic ranks were operationally defined as the median RED value at each rank ±0.1 (indicated by the yellow bars; red bars indicate ±0.2).