Oryctocephalus is a genus of
trilobite known from the
Middle Cambrian Burgess Shale. This small- to medium-sized trilobite's major characteristics are prominent eye ridges, pleural spines, long genal spines, spines on the
pygidium, and notably four furrows connecting pairs of pits on its
glabella. Juvenile specimens have been found with only 5 or 6 thoracic segments and about one eighth of adult size, as well as about 2 mm wide.