See text Lycopodiella Holub sensu Øllgaard (1987) Lycopodielloideae is a subfamily in the family Lycopodiaceae in the Pteridophyte Phylogeny Group classification of 2016 (PPG I).

The main stems are indeterminate and of various forms, including rhizomatous, creeping and upright.

Work by Josef Holub and Benjamin Øllgaard in the 1980s established three clear divisions within the family.

Three subfamilies, including Lycopodielloideae, were first suggested by Warren Wagner Jr. and Joseph Beitel in 1992, but were not validly published under the International Code of Botanical Nomenclature as it was then.

Field et al. (2016) included eight species of Lycopodielloideae in their analysis, which suggested the relationships among the genera shown in the following cladogram, where the number of species included in the study is shown in parentheses:[6] Lycopodiella (2 spp.)