Diplichnites

Diplichnites is an ichnogenus thought to be made by members of the Arthropoda family. It is a fossil trackway, showing two parallel lines of feet impressions. The famous terrestrial arthropod genus Arthropleura produces the trace fossil D. cuithensis. Diplicnites is traditionally thought to be a trilobite trace fossil; however it is also produced by other organisms, such as freshwater & terrestrial arthropods (of unknown affinity, but possibly myriapods).

Trilobite ichnotaxa: stationary to full stride
Three ichnotaxa describe trilobite motion: Rusophycus (resting), Cruziana (furrowing), and Diplichnites (walking). For the trilobites, gradations between the three ichnotaxa are common, and therefore can be confusing, or harder to categorize.