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Tiny, 540-Million-Year-Old Human Ancestor Didn't Have an Anus

Tiny, 540-Million-Year-Old Human Ancestor Didn't Have an AnusThe creature is so novel, it has its own family (Saccorhytidae), as well as its own genus and species (Saccorhytus coronaries), named for its wrinkled, sac-like body. S. coronaries, with its oval body and large mouth, is likely a deuterostome, a group that includes all vertebrates, including humans, and some invertebrates, such as starfish. "We think that as an early deuterostome, this may represent the primitive beginnings of a very diverse range of species, including ourselves," Simon Conway Morris, a professor of evolutionary palaeobiology at the University of Cambridge, said in a statement.




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