Abstract
An attempt to re-investigate the Acrothele prima Shale, formerly recorded as of Early Cambrian age, resulted in the discovery of a diverse Middle Cambrian trilobite fauna — a fortunate result considering the erroneous information surrounding the investigation of the Acrothele prima Shale. The new fauna, whose age approximates to the boundary between the gibbus Zone and fissus Zone, contains species not recorded previously in Shropshire: the trilobites are discussed and species described originally from New Brunswick are recorded from Britain for the first time, including Eccaparadoxides acadicus and Ctenocephalus (Hartella) matthewi .
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