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Showing results for tags 'zacanthoides'.
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Hi there, I have an old trilobite that I bought 20 years ago as a pre-teen that I have now completely forgotten all details of. I remember it was from a US locality, definitely a cambrian age trilobite. It's pretty small, measuring about 7 - 8 mm. Looking at it now I think it's a Zacanothoides or Olenellus but I cant be sure. It has a long genal spine and what looks to be an impression of another spine at the tip of its pygidium. As a bonus, if anyone recognizes the locality from the look of the matrix that would be awesome. I was thinking Pioche Formation in Nevada but could be wrong.