Marocella

Marocella is a conical shelly fossil of uncertain affinity (probably a mollusc) known from Cambrian strata of Europe, Morocco, Australia and Antarctica.
Morphology.
Limpet-like "Marocella " is a low conical shell with concentric ridges that grew to a couple of centimetres in length.
Affinity.
"Marocella" is thought to be a mollusc, although its position within this phylum is undetermined. Relationship to the halkieriids has also been considered.
Ecology.
Some specimens show evidence of repairing damage caused by predators. It probably moved around on the sea floor. It was geographically widespread.
Distribution.
Fossils of "Marocella" have been found in: