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Tetracyclus emarginatus

Tetracyclus emarginatus (Ehrenberg) W. Smith, 1856

• Modern species
• Habitat: Freshwater

• Classification
• kingdom Chromista, phylum Ochrophyta, class Bacillariophyceae, order Tabellariales, family Tabellariaceae, genus Tetracyclus

• Distribution
• Pleistocene: Nagano