Zacanthoides

Zacanthoides is an extinct Cambrian genus of trilobite. It was a nektobenthic predatory carnivore. Its remains have been found in Canada (British Columbia, especially in the Burgess Shale, and Newfoundland), Greenland, Mexico, and the USA (Alaska, Nevada, Utah, Vermont, and Idaho for which Z. idahoensis is named). Its major characteristics are a s...
Found on http://en.wikipedia.org/wiki/Zacanthoides
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