Diplichnites is an ichnogenus thought to be made by members of the Phylum Arthropoda. It is a fossil trackway

Fossil trackway

A fossil trackway is a type of trace fossil, a trackway made by an organism. Many fossil trackways were made by dinosaurs, early tetrapods, and other quadrupeds and bipeds on land...

 showing two parallel lines of feet impressions. The famous terrestrial arthropod genus Arthropleura

Arthropleura

Arthropleura was a 0.3–2.6 metre long relative of centipedes and millipedes, native to the Upper Carboniferous of what is now northeastern North America and Scotland...

produces the trace fossil D. cuithensis. Diplichnites is traditionally thought to be a trilobite trace fossil; however, it is also produced by other organisms such as freshwater and terrestrial arthropods of unknown affinity (possibly including myriapods).

Trilobite ichnotaxa: stationary to full stride

Three ichnotaxa describe trilobite motion: Rusophycus

Rusophycus

Rusophycus is a trace fossil allied to Cruziana. Rusophycus is the resting trace, recording the outline of the tracemaker; Cruziana is made when the organism moved...

(resting), Cruziana

Cruziana

Cruziana is a trace fossil consisting of elongate, bilobed, approximately bilaterally symmetrical burrows, usually preserved along bedding planes, with a sculpture of repeated striations that are mostly oblique to the long dimension...

(furrowing), and Diplichnites (walking).
For the trilobites, gradations between the three ichnotaxa are common and often difficult to categorize.

External links

Diplichnites:

• Photo--Diplichnites gouldi arthropod trackway--(marine, tidal); Article – "Bulletin 241", Kansas Geological Survey
  Kansas Geological Survey
  The Kansas Geological Survey, operated by The University of Kansas in connection with its research and service program, is to conduct geological studies and research and to collect, correlate, preserve, and disseminate information leading to a better understanding of the geology of Kansas, with...
  
  
• Photo--from Arthropleura sp; Article – "Nova Scotia, Carboniferous Geology and Paleontology"

Trilobite Tracks:

• Trilobite Trace Fossils – 3-main types of trilobite trace fossils