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Ediacaran fossils reveal origins of biomineralization that led to expansion of life on Earth

Ediacaran fossils reveal origins of biomineralization that led to expansion of life on Earth
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Fred Bowyer , Fredt Bowyer , Ediacaran Nama Group Of The Tsaus Mountains , University Of Edinburgh , Nama Group , Sciencex Network , Tsau Khaeb National Park , Planetary Science Letters , Kliphoek Member , Big Bang , Mara Member , Ediacaran Nama Group , Tsaus Mountains , Planetary Science ,

Ediacaran metazoan reveals lophotrochozoan affinity and deepens root of Cambrian Explosion

Abstract
Through exceptional preservation, we establish a phylogenetic connection between Ediacaran and Cambrian metazoans. We describe the first three-dimensional, pyritized soft tissue in
Namacalathus from the Ediacaran Nama Group, Namibia, which follows the underlying form of a stalked, cup-shaped, calcitic skeleton, with six radially arranged lobes projecting into an apical opening and lateral lumens. A thick body wall and probable J-shaped gut are present within the cup, and the middle layer of the often-spinose skeleton and skeletal pores are selectively pyritized, supporting an organic-rich composition and tripartite construction with possible sensory punctae. These features suggest a total group lophotrochozoan affinity. These morphological data support molecular phylogenies and demonstrates that the origin of modern lophotrochozoan phyla, and their ability to biomineralize, had deep roots in the Ediacaran. ....

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