Pectinifrons
Encyclopedia
Pectinifrons was a rangeomorph
Rangeomorph
The Rangeomorphs are a form taxon of frondose Ediacaran fossils that are united by a similarity to Rangea. Some workers, e.g. Pflug and Narbonne, suggest that a natural taxon Rangeomorpha may include all similar-looking fossils....

, a member of the Ediacara biota
Ediacara biota
The Ediacara biota consisted of enigmatic tubular and frond-shaped, mostly sessile organisms which lived during the Ediacaran Period . Trace fossils of these organisms have been found worldwide, and represent the earliest known complex multicellular organisms.Simple multicellular organisms such as...

found at Mistaken Point, Newfoundland.

It was a multi-branched organism with a comb-like appearance. It grew by adding fronds, then inflating them.
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