Fig. 7

The 95% predictions intervals (PI) for the relationship between the size of an infesting platyceratid and its crinoid host obtained from 1000 simulations of the platyceratid–crinoid association under 3 infestation scenarios: (1) preferential infestation of smaller crinoids (i α 1/crinoid size), 95% PI falls between dotted lines; (2) preferential infestation of larger crinoids (i α crinoid size), 95% PI falls between dashed lines; and (3) random infestation (i independent of crinoid size): 95% PI falls between the solid lines. Observed data from Monteagle Limestone on the relationship between the size of platyceratid and their Dizogocrinus hosts are represented by the solid black squares