When a partial fossil specimen of a primordial marine worm was unearthed in Utah in 1969, scientists had a tough go identifying it. Usually, such worms are recognized and categorized by the arrangement of little knobs on their plates. But in this case, the worm’s plates were oddly smooth, and important bits of the worm were missing altogether.
Click here for original story, Mysterious ancient sea-worm pegged as new genus after half-century in ‘wastebasket’
Source: Phys.org