Lapispira Lange, 1932

DESCRIPTION: Subvertical, concentrically arranged double helicoidal, corkscrew-like burrow. The two spirals are of constant diameter and connect at the base by an S-shaped burrow curve. The internal corkscrew diameter is 2-4 cm and the external corkscrew diameter is 4-7 cm. The burrow is tubular, unlined and unbranched, and may have scratch marks. There is no spreiten between the internal and external corkscrews. The burrows are generally filled with finer material than the host sediments.

BEHAVIOR(S): Most likely fodinichnia

ENVIRONMENTAL SETTINGS: Marine, specifically the shoreface-offshore transition zone and, rarely, the offshore environment.

POSSIBLE TRACEMAKERS: Unknown, but possibly decapod crustaceans

GEOLOGIC RANGE: Early Jurassic (Hettangian- Pliensbachian)

ADDITIONAL REFERENCES: Lanes et al. (2004)

REMARKS: Description from Lanes et al. (2004). Lapispira burrow walls are usually mined by Chondrites isp.

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