Table 2.
Group | Paraclade CG | Clade CG | CD at S/2 | |||
τ | P | τ | P | τ | P | |
Brachiopods and molluscs | −0.234 | 0.010 | −0.135 | 0.139 | −0.068 | 0.453 |
Arthropods | −0.307 | 5.2 × 10−4 | −0.077 | 0.386 | −0.047 | 0.592 |
Echinoderms | −0.274 | 8.0 × 10−3 | −0.151 | 0.145 | −0.028 | 0.784 |
Chordates | −0.367 | 8.7 × 10−12 | −0.161 | 2.8 × 10−3 | −0.048 | 0.373 |
Cambrian | −0.074 | 0.631 | −0.017 | 0.910 | 0.052 | 0.735 |
Paleozoic | −0.236 | 6.2 × 10−5 | −0.064 | 0.277 | −0.025 | 0.666 |
Meso-Cenozoic | −0.398 | 4.6 × 10−14 | −0.175 | 9.3 × 10−4 | −0.058 | 0.269 |
Associations between excess HSC and deviations from expected paraclade and clade centers of gravity (CGs) and cumulative disparity (CD) halfway through clade history (S/2) broken down by taxonomic group and time. τ gives Kendall’s rank correlation statistic.