Paleodictyon (Meneghini, 1850)

DESCRIPTION: Thin tunnels and shafts forming a hexagonal- to polygonal-shaped honeycomb-like network of ridges or furrows.

BEHAVIOR(S): Dwelling burrow system used for cultivating/trapping bacteria and other microbes, agrichnia.

ENVIRONMENTAL SETTINGS: Shallow to deep marine.

POSSIBLE TRACEMAKERS: Burrowing marine animals such as worms.

GEOLOGIC RANGE: Precambrian/Early Cambrian – ?Eocene

ADDITIONAL REFERENCES: Emended by Uchman, 1995; Archer and Maples, 1984; Pickerill, 1990; Crimes and Fedonkin, 1994; Wetzel, 2000; Fürsich et al., 2007.

REMARKS: Though found most commonly in deep-sea settings, Paleodictyon evolved in shallow marine environments during the Late Precambrian and Early Cambrian and later migrated to deep marine environments by the Late Cambrian. Paleodictyon has been reported in Mesozoic and Cenozoic shallow marine deposits, and rarely in post-Cambrian Paleozoic shallow marine deposits.

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