Ovatoscutum concentricum is one of many enigmatic organisms known from the Ediacaran deposits of the Flinders Ranges, Australia, and the White Sea area in Russia, dating around 555 Ma.

This fossil has the form of a rounded shield, enclosing strongly concentric corrugations or ribs, which weaken adjacent to a triangular neckline.

[1][2] The symmetry of these ribs exhibits glide reflection (opposite isometry); that is, the corresponding segments on the left and right sides do not line up, but are offset.

Ovatoscutum was first described by Martin Glaessner and Mary Wade in 1966, and this team tentatively interpreted it as a chondrophoran pneumatophore.

[1] Ovatoscutum fossils are negative imprints on the bases of sandstone beds with the "elephant skin" and tubercle texture, diagnostic of microbial mats.