Extinct Creatures Fill Puzzling Gap in the Fossil Record - SciTechDaily

Research reveals yunnanozoans as the oldest known stem vertebrates. New findings answer questions in the fossil record. The puzzling gap in the fossil record that would explain the evolution of invertebrates to vertebrates has long perplexed scientists. Verte…

Artistic reconstruction of the yunnanozoan from the Cambrian Chengjiang biota shows basket-like pharyngeal skeletons. Credit: Dinghua Yang Research reveals yunnanozoans as the oldest known stem vert… [+4848 chars]

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