Parent taxon: Lycophyta according to E. Taylor et al. 2008
Sister taxa: Acanthotriletes, Annalepis, Bacutriletes, Carinostrobus, Drepanophycales, Erlansonisporites, Ferganodendron, Guycampbellia, Horstisporites, Hughesisporites, Lepidocarpaceae, Pleuromeiales, Pleuromeiopsis, Protolepidodendrales, Protolepidodendron, Pseudolepidodendropsis, Sigillariaceae, Wexfordia
Subtaxa: Diaphorodendraceae Lepidodendraceae Lycopogenia
Distribution:
• Triassic of United States (1: North Carolina collection)
• Permian of Argentina (1), Australia (1), China (65), Germany (4), India (1), Indonesia (1), Italy (1), North Korea (4), Oman (1), South Africa (1), South Korea (4), United States (2: Texas)
• Namurian of Türkiye (3)
• Carboniferous of Belgium (1), Belize (1), Canada (25: New Brunswick, Newfoundland and Labrador, Northwest Territories, Nova Scotia, Nunavut), France (3), Germany (4), India (1), the Netherlands (2), Spain (1), Ukraine (3), the United Kingdom (27), United States (94: Alabama, Arizona, Colorado, Georgia, Illinois, Indiana, Kansas, Kentucky, Michigan, Missouri, New Mexico, Ohio, Oklahoma, Utah, Virginia, West Virginia)
• Devonian of Norway (3), United States (6: Indiana, Kentucky, New York)
Total: 261 collections including 490 occurrences