[2] This type of trackway was originally based on large fossils from Pennsylvanian strata of Nova Scotia, when Sir J. W. Dawson named it in 1873.

[3] Dawson proposed that Diplichnites were produced by a fish “walking” in shallow water on pectoral or ventral fin spines.

[6] In the decades following Dawson's work, the trackways of several other arthropods were also included within Diplichnites – particularly, trilobites, which are known from marine Paleozoic deposits around the world.

In addition, recent evidence indicates that some Diplichnites trackways from certain Cambrian intertidal and subaerial deposits of North America, especially the Potsdam and Elk Mound Groups, were produced by euthycarcinoids.

[7][8] In that scenario, the Diplichnites may have been undertracks that penetrated to the underlying layer of sediment, and the fossil trackways thus produced on the top surface (preserving the impression of the dragging tail) were Protichnites.