Arthropod trackways Trilobite trackways

Allocotichnus

Wide trackway; each set consists of a maximum of four, occasionally two or three pairs of tracks; on one side arranged as four long subparallel raking tracks, on the other side preserved as support imprints. The body of the producer was angled to the direction of movement, and only the first four or five pairs of walking legs were used. Detailed morphology of this trackway varies.

Petalichnus

Simple or complex trackways of varied morphology, consisting of numerous transversely elongated raking tracks. Imprints about 1-2 cm wide. Variation in morphology occurs depending upon angle of producer to direction of movement.

Dimorphichnus

Asymmetrical trails with two different types of impressions; thin, sigmoidal ones produced by raking movement, and blunt ones similar to impressions of toes. These tracks are arranged in series which are oblique to the direction of movement. Producers are thought to be laterally grazing trilobites.

Cruziana

Not strictly a trackway, these trails are produced by the animal ploughing through the sediment producing furrows with herringbone-shaped ridges, sometimes with lateral grooves. Could be synonymous with Isopodichnus.