Rare deep-sea starfish stuck in juvenile body plan

Scientists have combined embryological observations, genetic sequencing, and supercomputing to determine that small disk-shaped animals that once were thought to represent a new class of animals are actually starfish that have lost the large star-shaped, adult body from their life cycle. A computational biologists used a supercomputer to help support his contention that class-level status of Xyloplax does not reflect their evolutionary history.

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