Praecambridium

Praecambridium sigillum is an extinct organism that superficially resembles a segmented trilobite-like arthropod. It was originally described as being a trilobite-like arthropod, though the majority of experts now place it within the Proarticulata as a close relative of the much larger "Yorgia". It is from the Late Ediacaran deposit of Ediacara Hills, Australia, about 555 million years ago. On average, "P. sigillum" had at least 5 pairs of segments, with each unit becoming progressively larger as they approach the cephalon-like head.
Etymology.
The generic name is a compound word, with the Latin prefix "prae" "before" and a reference to the Cambrian mollusc genus "Cambridium", in reference to how the appearance of the various segments are reminiscent of the muscle-scars on the inner surface of the shells of "Cambridium". The specific name is from Latin "sigillum" "a sigil".
See also.
List of Ediacaran genera