The importance of sampling standardization for comparisons of insect herbivory in deep time: a case study from the late Palaeozoic.

When the herbivory index is bootstrapped for secondarily dominant plant hosts, which are represented by fewer than 100 specimens each, the herbivory index is even more highly variable (electronic supplementary material, figure S1). The difference in leaf surface area between CCP and MCF is highly significant ( p < 0.0001), but is not significant between individual plant hosts from the two localities (electronic supplementary material, table S2; figure S6).

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