Octosporella key
| Key adapted from Yao et al. (2006) | ||
| 1 | Ascospores broadly fusiform to fusiform-ellipsoidal; 1- to 2-guttulate | Octosporella fusispora |
| Ascospores elongate-ellipsoidal to cylindrical, sometimes with a terminal appendage; 3- or more guttulate | 2 | |
| 2 | Ascospores narrower than 10 μm [(23-)27-33(-37) × (6-)7-9(-10) μm]; with a long cylindrical appendage at one end; on Frullania | Octosporella erythrostigma |
| Ascospores broader than 10 μm [28-40(-48) × (10-)12-14(-16.5) μm]; lacking apical appendage; recorded on Cephaloziella, Chiloscyphus, Lophocolea and Plagiochila | Octosporella jungermanniarum | |