Parent taxon: Plantae according to A. Brongniart 1881
Sister taxa: Aculeisporites, Alethopteridae, Asterotheca, Calamitaceae, Carpolithes, Coniferophyta, Cordaitales, Cyclogranisporites, Cymodoceites, Cyperites, Dutoitia, Embryophyta, Flabellofolium, Holcospermum, Howisonia, Knorria, Kraeuselisporites, Lapposisporites, Lepidodendraceae, Lonchopteris, Loperia, Lycopodiophyta, Lycopodophyta, Magnoliophyta, Metaleiofusa, Myeloxylon, Neuropteridae, Pecopteris, Polysporangiophyta, Progymnospermophyta, Scythiana, Sigillariaceae, Spermatophyta, Sphenopteridae, Spheripollenites, Stigmaria, Sulcati, Tracheophyta, Trigonocarpus, Viridaeplantae, Wardia, Whittleseya, Yuknessia
Subtaxa: Pachytesta berryvillensis, Pachytesta gigantea, Pachytesta hoskinsii, Pachytesta muncii, Pachytesta saharasperma, Pachytesta saharasperma, Pachytesta vera