†phylum Prasinophyta Christensen 1962
Parent taxon: Protista according to Christensen 1962
Sister taxa: Actinopoda, Ambonosphaera, Chrysophyta, Dapcodinium, Dichadogonyaulax, Mendicodinium, Palaeopascichnus, Paragonyaulacysta
Subtaxa: Pterospermella
Distribution:
• Miocene of Azerbaijan (1 collection)
• Oligocene of Argentina (1), Azerbaijan (2)
• Cretaceous of Antarctica (18), Chile (2), the Russian Federation (3)
• Devonian of France (1), United States (1: Ohio)
• Cambrian of Norway (3)
Total: 32 collections including 36 occurrences