| Species | RefIntense Num | Refseq Num | Source |
|---|---|---|---|
| Wolbachia endosymbiont of Drosophila melanogaster | 1 | 12 | HMP |
| Wolinella succinogenes | 1 | 2 | HMP |
| Xanthobacter autotrophicus | 1 | 2 | HMP |
| Xanthomonas albilineans | 1 | 18 | HMP |
| Xanthomonas campestris | 1 | 167 | HMP |
| Xanthomonas citri | 3 | 201 | HMP |
| Xanthomonas euvesicatoria | 1 | 101 | HMP |
| Xanthomonas massiliensis | 1 | 2 | MGYG |
| Xanthomonas oryzae | 2 | 411 | HMP |
| Xenorhabdus bovienii | 1 | 14 | HMP |