Table 3.

Results of comparisons of the population median and distribution of completeness values for different Mesozoic vertebrate clades and plesiosaur morphotypes using Mann-Whitney-Wilcoxon tests. Asterisks indicate statistically significant results. See Figure 5 for boxplot comparisons of clade comparisons.

Dataset 1	Dataset 2	Test statistic (W)	p-value	p-values following FDR corrections
Plesiosaur SCM	Plesiosaur CCM	6242	0.61	0.61
Plesiosaur SCM	Ichthyosaur SCM	4636	0.01*	0.01*
Plesiosaur SCM	Sauropodomorph SCM	12363	0.0004*	0.001*
Plesiosaur CCM	Sauropodomorph CCM	12313	0.0005*	0.001*
Plesiosaur CCM	Mesozoic bird CCM	9609	0.00002*	0.0001*
Plesiosaur CCM	Pterosaur CCM	11893	0.002*	0.003*
‘Plesiosauromorph’ SCM	‘Pliosauromorph’ SCM	1545	0.042*	0.123
‘Plesiosauromorph’ SCM	‘Elasmosauromorph’ SCM	393	0.413	0.413
‘Pliosauromorph’ SCM	‘Elasmosauromorph’ SCM	299.5	0.363	0.413
‘Plesiosauromorph’ CCM	‘Pliosauromorph’ CCM	1182.5	0.647	0.647
‘Plesiosauromorph’ CCM	‘Elasmosauromorph’ CCM	269	0.224	0.532
‘Pliosauromorph’ CCM	‘Elasmosauromorph’ CCM	298.5	0.355	0.532