[1] Alternatively, it shows some morphological similarity to Characiosiphonaceae and closely related to it.

[2] It contains a number of parasitic taxa endophytic within vascular plants, mosses, or other algae.

Chloroplasts are usually parietally located, and may be divided into complex lobes and/or contain pyrenoids.

[3] This family appears to be an artificial assemblage of different parasitic genera.

[3] The genus Scotinosphaera was once classified in this family, but due to molecular evidence it has been placed in its own order (Scotinosphaerales) within Ulvophyceae.