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Swiss Journal of Palaeontology
Fig. 6 | Swiss Journal of Palaeontology

Fig. 6

From: The nature of the platyceratid–crinoid association as revealed by cross-sectional data from the Carboniferous of Alabama (USA)

Fig. 6

Ratio of sizes of infested–uninfested crinoids as a function of the nature of the association between platyceratids and crinoids expressed as the impact of the infesting platyceratid on the growth rate of its host (growth rate of infested crinoid: growth rate of uninfested crinoid). The average ratio of infested–uninfested crinoids (± 1 standard deviation) obtained from 1000 simulations; neutral scenario = solid circle (infested growth rate = uninfested growth rate); detrimental scenarios = open circles (infested growth rate < uninfested growth rate). The ratio of infested–uninfested crinoids in the Monteagle Limestone Dizygocrinus (1.07) is represented by the solid horizontal line

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