Table 1.

Disparity statistical tests. (Disparity values compared by groups. Statistical test is NPMANOVA (10 000 replications), with test statistic F and probability p. First two numerical columns denote sample size for each group. (a) Disparity measures for crurotarsans and dinosaurs in the Late Triassic and Early Jurassic, with NPMANOVA testing whether there is a significant difference in disparity across the interval within each clade. (b) Comparison of crurotarsan and dinosaur disparity in the Late Triassic and Early Jurassic, with NPMANOVA testing whether one group is significantly more disparate than the other in each time bin. Asterisks denote significant results.)

clade	Carnian–Norian	Early Jurassic	F	p-value
(a) changes in disparity across the Triassic–Jurassic boundary by clade
Crurotarsi	26	4	2.687	0.026*
Dinosauria	12	11	0.9309	0.4309

time	Crurotarsi	Dinosauria	F	p-value
(b) comparison of disparity between Crurotarsi and Dinosauria by time
Late Triassic	26	13	11.72	<0.0001*
Early Jurassic	4	12	7.191	0.0005*