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)
• 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), Turkey (3), Ukraine (2), 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: 260 collections including 488 occurrences