Parent taxon: Gymnospermophyta according to G. J. Retallack 1981
See also Lapasha and Miller 1985
Sister taxa: Aethophyllum, Alatocarpus, Allicospermum, Araucariales, Arberiella, Archaeosperma, Barakaroxylon, Belemnopteris, Bennettitales, Birsinghpuria, Bulbospermum, Cardiocarpum, Carpodium, Collospermum, Coniferae, Coniferales, Cordaitopsida, Cornucarpus, Cupressoconus, Damudoxylon, Entylissa, Gondwanophyllites, Indoxylon, Kamthioxylon, Kaokoxylon, Kryshtofovichiella, Lyginopteridopsida, Maheshwariella, Megaporoxylon, Nandorioxylon, Nidispermum, Niponophyllum, Nummulospermum, Otofeistia, Pakuriospermum, Palaeocarpus, Palispermum, Pantiaspermum, Paradoxospermum, Parapalaeoxylon, Platycardia, Polyloboxylon, Polysolenoxylon, Prototaxopitys, Prototaxoxylon, Pyriformispermum, Retortistoma, Rotundaspermum, Savitrispermum, Scirroma, Sclerospiroxylon, Sertostrobus, Shivacarpus, Sonajorispermum, Stephanostoma, Stereocarpus, Sujfunophyllum, Surangephyllum, Tanaidia, Tanaidocarpidium, Taxaliospermum, Taxineae, Taxopitys, Triangulospermum, Trigonomyelon, Uesuguipollenites, Voltziostrobus, Zalesskioxylon, Taeniopitys, Embergerixylon, Reticulopitys, Solenoxylon, Rugubivesiculites, Majsassia, Protocircoporoxylon, Indusiisporites, Svalbardoxylon, Protopolyporoxylon, Lasiostrobus, Cedripites, Tungussocarpus, Scotoxylon, Gnetaceaepollenites, Tordoxylon, Zonallapollenites, Enzonalasporites, Sofrepites, Pteridospermaexylon, Lobatoxylon, Galeacornea, Lagenospermopsida, Darneya, Cerebropollenites, Eddya, Ashmoripollis, Falcisporites, Accintisporites, Amdrupia, Squamae, Decussosporites, Ktalenia, Yezonia, Exesipollenites, Pilasporites, Perinopollenites, Yorkoxylon, Cycadinoxylon, Taxacites, Shanbeipollenites, Alisporites, Menaispermae, Striomonosaccites, Dinophyton, Prototaxodioxylon, Trisocladus, Antarcticoxylon, Parcisporites, Protopitys, Paradoxoxylon, Minutosaccus, Parataxopitys
Subtaxa: none
Ecology: "photoautotroph"
Distribution: