Synonym: Coniferopsida
Parent taxon: Pinophyta according to A. B. Doweld 2001
See also Hueber 1983, Mabberley 2000, McLoughlin et al. 1995 and Meyen 1984
Sister taxa: Condylites, Masculostrobus, Palaeocyparis, Podocarpopsida, Satyrites incertus, Taxopsida, Voltziopsida, Nummulospermum, Taxaliospermum, Polyloboxylon, Taxopitys, Polysolenoxylon, Cardiocarpum, Bulbospermum, Pakuriospermum, Tanaidia, Cornucarpus, Pyriformispermum, Cordaitopsida, Rotundaspermum, Aethophyllum, Tanaidocarpidium, Voltziostrobus, Collospermum, Palaeocarpus, Arberiella, Taxineae, Prototaxopitys, Gondwanophyllites, Triangulospermum, Sertostrobus, Nandorioxylon, Sujfunophyllum, Trigonomyelon, Kamthioxylon, Parapalaeoxylon, Zalesskioxylon, Birsinghpuria, Otofeistia, Sonajorispermum, Retortistoma, Cupressoconus, Shivacarpus, Belemnopteris, Indoxylon, Paradoxospermum, Surangephyllum, Kryshtofovichiella, Sclerospiroxylon, Araucariales, Savitrispermum, Pantiaspermum, Bennettitales, Damudoxylon, Prototaxoxylon, Kaokoxylon, Niponophyllum, Palispermum, Platycardia, Stereocarpus, Carpodium, Uesuguipollenites, Alatocarpus, Stephanostoma, Dadoxylon, Maheshwariella, Barakaroxylon, Coniferales, Megaporoxylon, Nidispermum, Archaeosperma, Scirroma, Entylissa, Coniferoovulites
Subtaxa: Araucariocaulon Araucariophloios Cordaitanthales Eoglyptostrobus Feistmantelia Pennsylvanioxylon Phyllocladaceae Pinales