This is a rich and large plate with numerous trilobite specimens of the species Elrathia kingi from the Wheeler Shale of Utah. The largest Elrathia kingi on this plate is remarkable 37 mm long. The smallest specimens in this trilobite cluster are juvenile Meraspis stages with a length of only a few millimetres.
In total there are more than 20 trilobites on this scene from the middle Cambrian of Utah.

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