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Macaronichnus isp.

ichnogenus Macaronichnus

Ichnogenus, a type of trace fossils, interpreted as waste traces of Polychaeta (Ragworm), formerly considered as trace fossils of Excirolana sp..

Reference: Masakazu Nara, Kaseki, vol.56, pp.9-20 (1994)

• Modern species: Late Jurassic - Present (150.8 - 0.0 Ma)
• Habitat: Marine

• Classification
• Trace fossil

• Distribution
• Miocene: Hokkaido (as Excirolana sp.)
• Miocene-Pliocene: Hokkaido (as Excirolana sp.)
• Pliocene: Hokkaido (as Excirolana sp.)
• Pleistocene: Aomori, Ibaraki (as Excirolana sp.), Chiba (as Excirolana sp.), Kanagawa (as Excirolana sp.)