Table 2. Average age of the shiftpoints (in Ma) and the percentage of time since clade inception to the shiftpoints.
| Major Clade | clade | shiftpoints | p.dist | area.test | net.t | slope | p.slope |
|---|---|---|---|---|---|---|---|
| Ammonites | Desmoceratidae | 101.7 (56.8%) | 0.001 | 0.68 | 0 | −10941.1 | 0.659 |
| Anthozoans | Auloporida | 393.9 (28.5%) | 0.007 | 136.64 | 0 | −1486.7 | 0.059 |
| Anthozoans | Auloporida | 288.3 (85.6%) | 0.024 | 504.43 | 0 | 9156.0 | 0.151 |
| Anthozoans | Cystiphyllida | 393.1 (84.5%) | 0.184 | 0 | 0 | 164389.6 | NA |
| Anthozoans | Favositida | 415.5 (17.8%) | 0.003 | 30.98 | 0 | −9464.8 | 0.000 |
| Anthozoans | Favositida | 383.1 (34.2%) | 0.002 | 32.11 | 0 | −1562.2 | 0.012 |
| Anthozoans | Stauriida | 358.8 (47.7%) | 1.000 | 16.88 | 0 | −2772.6 | 0.000 |
| Anthozoans | Stauriida | 361.2 (46.5%) | 0.199 | 18.05 | 0 | −2772.6 | 0.000 |
| Anthozoans | Stauriida | 372.9 (40.7%) | 1.000 | 23.38 | 0 | −2810.6 | 0.000 |
| Bivalves | Pterineidae | 400.5 (27.2%) | 0.046 | 25.09 | 0 | −4884.8 | 0.046 |
| Brachiopods | Athyridida | 306.4 (55.3%) | 0.870 | 13.55 | 0 | −2118.5 | 0.014 |
| Brachiopods | Athyridida | 284.9 (63.3%) | 0.298 | 12.78 | 0 | −810.1 | 0.325 |
| Brachiopods | Orthida | 372.8 (50.2%) | 0.780 | 53.97 | 0 | −1040.8 | 0.000 |
| Brachiopods | Orthida | 360.2 (55.4%) | 0.512 | 49.33 | 0 | −916.3 | 0.011 |
| Brachiopods | Orthotetida | 404.7 (24.9%) | 0.003 | 14.79 | 1 | −951.8 | 0.251 |
| Brachiopods | Orthotetida | 347.4 (53.2%) | 0.002 | 22.37 | 0.974 | 886.4 | 0.601 |
| Brachiopods | Orthotetida | 294.7 (79.2%) | 0.000 | 13.73 | 0 | 8810.1 | 0.211 |
| Brachiopods | Productida | 276.9 (87.1%) | 0.038 | 0.03 | 0 | 18956.9 | 0.144 |
| Brachiopods | Spiriferida | 316.9 (64.6%) | 1.000 | 45.61 | 0.014 | 453.7 | 0.732 |
| Brachiopods | Spiriferinida | 258.3 (38.0%) | 0.016 | 0.909 | 0 | 219.1 | 0.335 |
| Brachiopods | Strophomenida | 406.7 (43.0%) | 0.004 | 61.31 | 0 | −6006.0 | 0.068 |
| Bryozoans | Cystoporida | 276.5 (86.5%) | 0.021 | 0.69 | 0 | 48723.2 | 0.093 |
| Bryozoans | Fenestrida | 292 (78.3%) | 0.000 | 0.08 | 0 | −4184.0 | 0.612 |
| Bryozoans | Rhabdomesida | 294 (79.8%) | 0.021 | 1.67 | 0 | −10506.9 | 0.008 |
| Bryozoans | Trepostomida | 399.4 (19.9%) | 0.000 | 34.08 | 0 | 1655.2 | 0.003 |
| Bryozoans | Trepostomida | 274.2 (59.8%) | 0.003 | 44.81 | 0 | 2291.5 | 0.023 |
| Gastropods | Bellerophontidae | 324.2 (66.0%) | 0.000 | 1.09 | 0 | 4228.9 | 0.046 |
| Gastropods | Euomphalidae | 356.7 (48.8%) | 0.000 | 74.53 | 0 | −5382.5 | 0.003 |
| Gastropods | Lophospiridae | 294.3 (62.4%) | 0.059 | 82.41 | 0 | −4851.4 | 0.004 |
| Trilobites | Proetidae | 375.2 (58.0%) | 0.045 | 58.74 | 0 | −22289.3 | 0.148 |
The probability that the distance among shift points is lower than expected by chance (p.dist). The ratio of the percentage of area per unit time between the total range and the clade range curves after the average shiftpoint as compared to the same figure before the shiftpoint (see Fig. 1 for further explanation)(area.test). The probability that net diversification rates decrease after the shiftpoint (net.t). The slope of the regression between the average species range and time after the shiftpoint (slope) and the probability that such a regression slope is different from zero (p.slope). Values in bold indicate compliance to weak directionality theory.