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Elyssa Rider

Bizarre walking worm finds its place in evolutionary tree

Hallucigenia sparsa, a strange creature that walked the seas 500 million years ago, may have finally found its family, The Washington Post reports. With its dorsal spines and a head easily confused with its tail, this wormlike animal baffled scientists for nearly 40 years—largely because no living animals seemed to be related to it. But researchers from the University of Cambridge have shown that Hallucigenia has something odd in common with today’s velvet worms: Its claws, like velvet worms’ jaws, are made up of cuticle layers stacked inside one another, they report online this week in Nature. That means Hallucigenia is likely the velvet worm’s great-great-great-great-great-etc. grandmother.

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