All organisms need nutrients simply to survive and grow, but nutrients can also dictate body size and shape. Its discovery in England in was important in establishing the Precambrian age of rangeomorph fossils.
LinkedIn Copy the link It was only in the 20th century that large, complex fossils were identified from what is now named the Ediacaran period, the last interval of the Proterozoic Eon. They dominated Ediacaran deep-water ecosystems for around 15 million years, before experiencing a decline in diversity and eventually disappearing from the fossil record at the end of the Ediacaran Period.
Canada's Mistaken Point biota in southeastern Newfoundland represents not only the earliest at million year old but also one of the best-preserved Ediacaran communities known.
This makes them "hostile witnesses" to the veracity of the design hypothesis presented by Meyer. The analyses were centred on one key fossil, a small specimen of the rangeomorph species Avalofractus abaculus which was preserved in exquisite, three-dimensional detail shown in the poster image.
Typifying this transition is the Ediacara biota, a group of globally distributed soft-bodied organisms whose affinities are fiercely debated and whose disappearance from the fossil record before the Cambrian explosion is equally perplexing.
These include increases in oxygen and, potentially, other nutrients such as organic carbon. Extinct groups taxa are represented with a circled cross.