Grazing bioerosion, notably by chitons, gastropods and regular echinoids, is a powerful destructive force in many recent shallow-marine environments and impacts significantly on sessile epibionts through grazing predation and/or unselective dislodgement. Grazing bioerosion was an important component of a major phase of biotic escalation; the Mesozoic marine revolution. Recent investigations of hard substrates in southern British Jurassic marine formations have identified widespread ichnofossils attributable to grazing activity by gastropods and/or chitons, and regular echinoids. The co-occurring benthic macrofaunas include groups that would have been vulnerable to grazing disturbance and dislodgement; notably articulate brachiopods. The emerging ichnological evidence strengthens the argument for grazing bioerosion as a significant contributor to the Mesozoic–Cenozoic decline of the articulate brachiopods, and their retreat to deep-water and/or cryptic refugia.