Synonym: Hoplichnus poledrus Hitchcock 1858
Full reference: E. Hitchcock. 1848. An attempt to discriminate and describe the animals that made the fossil footmarks of the United States, and especially of New England. Memoirs of the American Academy of Arts and Sciences, new series 3:129-256
Sister taxon: Hoplichnus equus
- Hoplichnus quadrupedans: AC 29/3, a footprint. Its type locality is below Turners Falls, tracksite, which is in a Hettangian/Sinemurian fluvial-lacustrine sandstone/shale in the Portland Formation of Massachusetts.
- Hoplichnus poledrus: AC 36/1, a footprint. Its type locality is Ferry above Turners Falls, tracksite, which is in a Hettangian/Sinemurian fluvial-lacustrine sandstone in the Portland Formation of Massachusetts.