Oldest known brachiopod burrow: the Lower Cambrian of Labrador

A specimen of the ichnospecies Lingulichnus verticalis was recovered from the Lower Cambrian Bradore Formation of southern Labrador. The sample represents the only known Cambrian example of an in situ lingulid, and sheds light on the evolution of the ethology of lingulids. Prior to this it was assumed that Cambrian lingulids maintained a non-burrowing mode of life.