Class Cephalozoa Species P. sigillum | Family Yorgiidae Rank Genus | |
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Similar Ovatoscutum, Parvancorina, Vendia, Onega stepanovi, Proarticulata | ||
the evolution of life praecambridium sigillum
Praecambridium sigillum is an extinct organism that superficially resembles a segmented trilobite-like arthropod, though the majority of experts now place it within the Proarticulata. It is from the Late Precambrian 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.
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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".
References
Praecambridium Wikipedia(Text) CC BY-SA