Psilophytopsida - Psilophytales
Synonym: Trimerophytales Kasper et al. 1974
Parent taxon: Psilophytopsida according to A. B. Doweld 2001
Sister taxon: Dawsonites
Subtaxa: Arachnoxylon Barsassia Cooksonia Dicranophyton Distichophytum Dutoitia Gilboaphyton Gosslingia Legrandia Lerichea Loganiella Loganophyton Niayssioidea Orestovia Paulophyton Pseudosporochnus Psilophytaceae Rhynia Sacheocladus Trimerophytaceae Uralia Wattieza
Distribution:
• Carboniferous of Bolivia (1 collection), Brazil (1), Canada (2: New Brunswick), Peru (1)
• Givetian of Belgium (1)
• Devonian of (1), Belgium (22), Brazil (3), Canada (43: New Brunswick, Nunavut, Ontario, Quebec), China (3), Colombia (1), Czechia (17), France (2), Germany (5), Norway (6), the Russian Federation (3), South Africa (3), the United Kingdom (8), United States (21: Alaska, Arizona, Maine, New York, Wyoming), Venezuela (2)
• Silurian to Devonian of Canada (1: Nunavut)
• Silurian of Bolivia (2), Canada (2: Nunavut, Ontario), Czechia (5), Ireland (1), Libya (1), Poland (1), Ukraine (2), the United Kingdom (7), United States (3: New York)
Total: 171 collections including 245 occurrences