Alternative spelling: Alethopteris
Parent taxon: Pecopteris according to Oldham and Morris 1862
See also Chandra and Tewari 1991, Dilcher et al. 2005 and Lakhanpal et al. 1976
Sister taxa: Pecopteris affinis, Pecopteris arctica, Pecopteris borealis, Pecopteris buhsei, Pecopteris concinna, Pecopteris cycloloba, Pecopteris filatovae, Pecopteris geyleriana, Pecopteris lobata, Pecopteris montanensis, Pecopteris pennaeformis, Pecopteris rarinervis, Pecopteris sepulta, Pecopteris sulziana, Pecopteris totangensis
Subtaxa: Alethopteris branneri Alethopteris lobifolia Alethopteris lonchiticus Alethopteris roesserti Alethopteris valida Alethopteris whitbyensis Alethopteris whitneyi
Type: Filicites lonchiticus
Distribution:
• Cretaceous of Belgium (1 collection)
• Jurassic to Cretaceous of India (1)
• Jurassic of India (4), Mexico (1)
• Triassic of Australia (1), Mexico (11)
• Permian of China (36), Czechia (1), France (1), Germany (10), India (5), Indonesia (1), Italy (1), Malaysia (1), Morocco (2), North Korea (1), the Russian Federation (2), Thailand (1), United States (2: Oklahoma, Texas)
• Carboniferous of Canada (15: New Brunswick, Nova Scotia, Prince Edward Island), Germany (1), India (1), Portugal (2), Spain (6), Türkiye (2), the United Kingdom (2), United States (54: Alabama, Georgia, Illinois, Indiana, Kansas, Kentucky, Michigan, Missouri, New Mexico, Ohio, Oklahoma, Pennsylvania, West Virginia)
Total: 166 collections including 233 occurrences