Two parallel rows of bow- or spindle-shaped tracks, transversely or slightly obliquely arranged to the mid-line. Tracks are opposite indicating in-phase walking. Produced by homopodous (legs all of the same morphology), multi-limbed phyllopod crustaceans.
Double rows of very sharp transverse tracks, usually single but some joined internally or externally (rarely) to form bifid tracks. Producers are homopodous crustaceans.
Trackway consisting of paddle shaped tracks, with repetition every four pairs; width of trackway between first pair smaller than that of fourth pair. Between the two rows of tracks is a series of small, oval imprints, closer to one side than the other. These are arranged in a regularly sinuous pattern.