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Taxonomic Description of Second Vertebrate Mitochondrial Genomic Data set
| Number of Different Genomes | Class | Number of Genera by Class | Number of Species by Class |
| 347 | Actinopterygii | 18 | 108 |
| Amphibia | 7 | 54 | |
| Aves | 2 | 7 | |
| Mammalia | 14 | 36 | |
| Reptilia | 4 | 20 |
Note.—Table describes taxonomic classification for the second vertebrate genomic data set, used to estimate gene-specific nonsynonymous and synonymous substitution rates (for details, see text).
