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CCDB → Bryophytes → Hypopterygiaceae → Hypopterygium
| Taxon name | Status | Median (n) |
| Hypopterygium rotulatum (Hedw.) Brid. | Accepted | None |
| Hypopterygium tamariscinum (Hedw.) Brid. | Accepted | 18 |
| Hypopterygium novae-seelandiae M. Hal. | Synonym of Hypopterygium didictyon M. Hal. | 6 |
| Hypopterygium novae-seelandiae subsp. viridulum Kindb. | Synonym of Hypopterygium didictyon M. Hal. | 6 |
| Hypopterygium fauriei Besch. | Synonym of Hypopterygium flavolimbatum M. Hal. | 9 |
| Hypopterygium formosanum Nog. | Synonym of Hypopterygium flavolimbatum M. Hal. | 9 |
| Hypopterygium japonicum Mitt. | Synonym of Hypopterygium flavolimbatum M. Hal. | 9 |
| Hypopterygium tenellum M. Hal. | Synonym of Hypopterygium tamarisci (Sw.) Brid. ex M. Hal. | 9 |