Family Scytonemataceae
Hormogoneae - Nostocales - Scytonemataceae
Parent taxon: Nostocales according to V. N. Sergeev et al. 1995
See also Daley 1974
Sister taxa: Nostocaceae, Rivulariaceae
Subtaxa: Circumvaginalis Encrusta Epivalvia Scytonema
Ecology: stationary "photoautotroph"
Distribution:
• Eocene of the United Kingdom (2 collections)
• Ectasian of the Russian Federation (1)
• Calymmian of the Russian Federation (4)
Total: 7 collections each including a single occurrence