incertae sedis: Sphaeropleales is an order of green algae that used to be called Chlorococcales.

[3] The Sphaeropleales includes vegetatively non-motile unicellular, colonial , or filamentous taxa.

[5] With an increase in the number of taxa for which sequence data are available, there is evidence of an expanded DO clade that includes additional zoosporic (Bracteacoccus, Schroederia) and some strictly autosporic genera such as Ankistrodesmus, Scenedesmus, Selenastrum, and Monoraphidium.

The filamentous Microspora has been allied with the coccoid genus Bracteacoccus based on molecular data.

[3][4] Modern molecular phylogenetics suggest the following relationships (not all families are included):[5] Schizochlamydaceae Tumidellaceae Bracteamorphaceae Pseudomuriellaceae Radiococcaceae Bracteacoccaceae Nephrocytiaceae Chromochloridaceae Schroederiaceae Neochloridaceae Hydrodictyaceae Selenastraceae Dictyococcaceae Rotundellaceae Scenedesmaceae Mychonastaceae Dictyochloridaceae Sphaeropleaceae Taxonomists have had difficulties classifying Characiaceae and Microsporaceae using molecular genetics, because the taxonomic affiliations of the type species are unclear.