Helminthoida Schafhäutl, 1851
DESCRIPTION: Regular tightly constrained, closely spaced irregular to parallel meandering smooth burrows on surface of bedding. Burrows do not branch, cross over, nor interpenetrate each other.
BEHAVIOR(S): Grazing (pasichnia) trace.
ENVIRONMENTAL SETTINGS: Marine, low energy, shallow to deep water.
POSSIBLE TRACEMAKERS: Burrowing marine organisms, such as worms or vermiform organism.
GEOLOGIC RANGE: Cambrian-recent.
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