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Rivularia sp.

genus Rivularia C Agardh ex Bornet and Flahault, 1886

Invalid synonym: Stenoporidium sp. (after Dragastan, 1985)

• Extinct species: Late Ordovician - Early Cretaceous (455.8 - 122.5 Ma)
• Habitat: Marine

• Classification
• kingdom Bacteria, phylum Cyanobacteria, class Cyanophyceae, order Nostocales, family Rivulariaceae

• Distribution
• Cretaceous: Saitama