| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Gyrosigma Hassall 1845 | 0 | 0 | 3 |
| Heliopeltaceae | 1 | 0 | 0 |
| Hemiaulaceae | 4 | 0 | 0 |
| Hemiaulales | 2 | 0 | 0 |
| Hemiaulus P. A. C. Heiberg 1863 | 1 | 0 | 3 |
| Hemiaulus P. A. C. Heiberg 1863 | 0 | 0 | 3 |
| Lauderia P. T. Cleve 1873 | 1 | 0 | 0 |
| Lauderia borealis | 0 | 0 | 3 |
| Lauderiaceae | 1 | 0 | 0 |
| Leptocylindraceae | 1 | 0 | 0 |
| Leptocylindrales | 1 | 0 | 0 |
| Leptocylindrus | 1 | 0 | 0 |
| Leptocylindrus danicus | 0 | 0 | 3 |
| Lithodesmiaceae | 2 | 0 | 0 |
| Lithodesmiales | 1 | 0 | 0 |
