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CCDB → Bryophytes → Pottiaceae → Hydrogonium
| Taxon name | Status | Median (n) |
| Hydrogonium arcuatum (Griff.) Wijk & Margad. | Accepted | 13 |
| Hydrogonium comosum (Dozy & Molk.) Hilp. | Accepted | 13 |
| Hydrogonium consanguineum (Thwaites & Mitt.) Hilp. | Accepted | 13 |
| Hydrogonium ehrenbergii (Lorentz) A. Jaeger | Accepted | 13 |
| Hydrogonium gangeticum (M. Hal.) P. C. Chen | Accepted | 13 |
| Hydrogonium gracilentum (Mitt.) P. C. Chen | Accepted | 13 |
| Hydrogonium javanicum (Dozy & Molk.) Hilp. | Accepted | 13 |
| Hydrogonium leucodontoides Gangulee | Accepted | 13 |
| Hydrogonium mamatkulovii Lazarenko | Accepted | 13 |
| Hydrogonium sordidum (Besch.) P. C. Chen | Accepted | 13 |
| Hydrogonium subpellucidum (Mitt.) Hilp. | Accepted | 13 |
| Hydrogonium sordidum (Besch.) Chen | Synonym of Hydrogonium sordidum (Besch.) P. C. Chen | 13 |