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Actinocyclus sp.

genus Actinocyclus C. G. Ehrenberg, 1837

• Modern species: middle Miocene - Present (13.7 - 0.0 Ma)
• Habitat: Marine

• Classification
• kingdom Chromista, phylum Ochrophyta, class Bacillariophyceae, order Coscinodiscales, family Hemidescaceae

• Distribution
• Miocene: Iwate, Tochigi
• Quaternary: Chiba
• Pleistocene: Ishikawa

• Subtaxa
• A. ehrenbergii
• A. ingens
• A. undulatus