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Updated: May 16, 2025
In the Bala and Caradoc beds the trilobites reach their maximum, being represented by 111 species referred to 23 genera. Youngest state. Natural size and magnified; the body rings not at all developed. b. A little older. One thorax joint. c. Still more advanced. Three thorax joints. Trinucleus concentricus, Eaton. Syn. T. Caractaci, Murch.
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