| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Hypnales | 1 | 0 | 0 |
| Inversiula Jullien 1888 | 1 | 0 | 0 |
| Inversiula nutrix Jullien 1888 | 0 | 0 | 1 |
| Inversiulidae Vigneaux 1949 | 1 | 0 | 0 |
| Isopoda Latreille 1817 (isopods) | 1 | 0 | 0 |
| Jungermanniales (Leafy liverworts) | 2 | 0 | 0 |
| Jungermanniopsida | 1 | 0 | 0 |
| Kirchenpaueriidae Stechow 1921 | 1 | 0 | 0 |
| Leptothecata Cornelius 1992 | 3 | 0 | 0 |
| Limopsidae Dall 1895 | 1 | 0 | 0 |
| Limopsis Sassi 1827 | 1 | 0 | 0 |
| Limopsis lilliei E. A. Smith 1915 | 0 | 0 | 1 |
| Littorinimorpha Golikov & Starobogatov 1975 | 1 | 0 | 0 |
| Lophocoleaceae | 1 | 0 | 0 |
| Macronectes Richmond 1905 | 1 | 0 | 0 |
