article_snippet: Yawunik kootenayi had four eyes and long whip-like antennae that extended from the tips of Yawunik kootenayi claws.
article_snippet: The researchers, whose study is published in the journal Palaeontology, describe how Yawunik has many primitive features that resemble those that later evolved in insects and crustaceans.
article_snippet: Yawunik has long frontal appendages that resemble the antennae of modern beetles or shrimp, but in Yawunik long frontal appendages that resemble the antennae of modern beetles or shrimp were actually each comprised of three long claws.
article_snippet: When attacking its prey, Yawunik probably spread Yawunik claws out in front of Yawunik and then retracted its prey under Yawunik body when swimming, say the researchers.
article_snippet: Mr Aria said: 'Unlike insects or crustaceans, Yawunik did not possess additional appendages in the head that were specifically modified to process food. '
article_snippet: Yawunik and Yawunik relatives tell We about the condition existing before such a division of tasks among parts of the organism took place.'
article_snippet: Although only a few inches long, Yawunick was probably one of the key predators in the seas at the time when the water was dominated by trilobites and before the first fish had begun to emerge.
article_snippet: The new species Yawunik is thought to have folded Yawunik long front claws under Yawunik body when Yawunik was swimming. 
article_snippet: Professor Jean-Bernard Caron, who led the study at the University of Toronto, said: 'Yawunik is the most abundant of the large new species of the Marble Canyon site, and so, as a predator, Yawunik held a key position in the food network and had an important impact on this past ecosystem.'