Table 1.
Results of the SMA regressions using total skull length as the independent variable
| Measurement | n | R 2 | P-value (regression test) | Slope | Lower limit (90% CI) | Upper limit (90% CI) | P-value (isometry test) | Trend |
|---|---|---|---|---|---|---|---|---|
| Skull maximum height | 5 | 0.9013 | 0.0136 | 1.5614 | 1.0312 | 2.3642 | 0.0848 | (+) |
| Length anterior to antorbital fenestra | 8 | 0.9627 | < 0.0001 | 1.0390 | 0.8920 | 1.2102 | 0.6445 | = |
| Postorbital region maximum width | 6 | 0.7119 | 0.0371 | 1.2538 | 0.7272 | 2.1619 | 0.4430 | = |
| Premaxillary body length | 7 | 0.9094 | 0.0008 | 1.2279 | 0.9392 | 1.6053 | 0.1850 | = |
| Premaxillary body height | 9 | 0.8714 | 0.0002 | 1.2245 | 0.9498 | 1.5786 | 0.1761 | = |
| Number of premaxillary teeth | 8 | 0.6498 | 0.0156 | 0.6983 | 0.4436 | 1.0994 | 0.1798 | = |
| Largest premaxillary tooth length at base | 7 | 0.7902 | 0.0074 | 1.1434 | 0.7650 | 1.7088 | 0.5408 | = |
| Snout minimum width | 9 | 0.9256 | < 0.0001 | 0.8868 | 0.7303 | 1.0766 | 0.2806 | = |
| Maxilla length | 8 | 0.9610 | < 0.0001 | 1.1000 | 0.9411 | 1.2856 | 0.2811 | = |
| Maxilla horizontal process minimum height | 10 | 0.9339 | < 0.0001 | 1.4498 | 1.2254 | 1.7154 | 0.0031 | + |
| Maxilla length anterior to antorbtial fenestra | 9 | 0.9560 | < 0.0001 | 1.0918 | 0.9401 | 1.2581 | 0.3036 | = |
| Number of maxillary teeth | 9 | 0.8386 | 0.0005 | 0.5323 | 0.4008 | 0.7070 | 0.0030 | − |
| Largest maxillary tooth height | 9 | 0.6910 | 0.0054 | 0.6598 | 0.4475 | 0.9727 | 0.0810 | (−) |
| Largest maxillary tooth length at base | 10 | 0.6201 | 0.0068 | 0.6045 | 0.4073 | 0.8972 | 0.0426 | − |
| Antorbital fenestra length | 6 | 0.9679 | 0.0004 | 0.9721 | 0.8041 | 1.1753 | 0.7682 | = |
| Lacrimal length | 4 | 0.9275 | 0.0369 | 0.9799 | 0.5764 | 1.6659 | 0.9249 | = |
| Lacrimal height | 6 | 0.7111 | 0.0349 | 1.3518 | 0.7834 | 2.3323 | 0.3184 | = |
| Jugal anterior process height | 10 | 0.7504 | 0.0012 | 1.3242 | 0.9589 | 1.8288 | 0.1458 | = |
| Orbit length | 7 | 0.8210 | 0.0049 | 0.8406 | 0.5790 | 1.2200 | 0.3986 | = |
| Orbit height | 6 | 0.9567 | 0.0007 | 1.8453 | 1.4808 | 2.2995 | 0.0033 | + |
| Frontal length | 8 | 0.9512 | < 0.0001 | 0.9001 | 0.7562 | 1.0714 | 0.2864 | = |
| Frontals minimum width | 9 | 0.7344 | 0.0032 | 0.9030 | 0.6293 | 1.2958 | 0.6162 | = |
| Postfrontal oblique length | 5 | 0.8219 | 0.0338 | 0.7680 | 0.4450 | 1.3256 | 0.3532 | = |
| Postorbital length | 7 | 0.8586 | 0.0026 | 1.4765 | 1.0586 | 2.0593 | 0.0634 | (+) |
| Postorbital height | 7 | 0.9860 | < 0.0001 | 0.8436 | 0.7586 | 0.9382 | 0.0231 | − |
| Squamosal length | 6 | 0.7033 | 0.0370 | 0.9523 | 0.5482 | 1.6541 | 0.8662 | = |
| Squamosal height | 8 | 0.9206 | 0.0002 | 1.2089 | 0.9686 | 1.5088 | 0.1480 | = |
| Squamosal ventral process height | 8 | 0.8810 | 0.0005 | 1.2891 | 0.9838 | 1.6891 | 0.1180 | = |
| Squamosal ventral process base length | 8 | 0.8310 | 0.0016 | 0.8916 | 0.6470 | 1.2287 | 0.5191 | = |
| Infratemporal fenestra length | 8 | 0.9611 | < 0.0001 | 1.4242 | 1.2187 | 1.6642 | 0.0042 | + |
| Infratemporal fenestra height | 6 | 0.9092 | 0.0032 | 1.3923 | 1.0152 | 1.9094 | 0.0888 | (+) |
| Supratemporal fenestra length | 10 | 0.8230 | 0.0002 | 1.1224 | 0.8541 | 1.4750 | 0.4588 | = |
| Supratemporal fossa width | 11 | 0.7965 | 0.0012 | 1.2118 | 0.8820 | 1.6649 | 0.2942 | = |
| Quadrate height | 5 | 0.8144 | 0.0360 | 1.2864 | 0.7376 | 2.2434 | 0.3814 | = |
| Parietal length | 10 | 0.8314 | 0.0002 | 1.0100 | 0.7736 | 1.3188 | 0.9468 | = |
| Parietals maximum width | 8 | 0.8912 | 0.0004 | 1.4396 | 1.1113 | 1.8648 | 0.0326 | + |
| Parietals minimum width | 10 | 0.9528 | < 0.0001 | 0.7445 | 0.6458 | 0.8584 | 0.0046 | − |
| Width between paroccipital processes | 6 | 0.7940 | 0.0171 | 1.3823 | 0.8668 | 2.2043 | 0.2202 | = |
| Ectopterygoid width | 5 | 0.8044 | 0.0391 | 1.1266 | 0.6374 | 1.9912 | 0.6717 | = |
| Lower jaw length | 7 | 0.9743 | < 0.0001 | 0.9830 | 0.8512 | 1.1352 | 0.8212 | = |
| Dentary length | 10 | 0.9915 | < 0.0001 | 1.0180 | 0.9582 | 1.0814 | 0.5981 | = |
| Dentary anterior height | 10 | 0.8966 | < 0.0001 | 0.8986 | 0.7285 | 1.1083 | 0.3734 | = |
| Number of dentary teeth | 6 | 0.7152 | 0.0338 | 0.4524 | 0.2631 | 0.7778 | 0.0300 | − |
| Surangular height | 9 | 0.6858 | 0.0058 | 0.9917 | 0.6706 | 1.4666 | 0.9697 | = |
| Angular length | 5 | 0.9576 | 0.0037 | 0.9604 | 0.7287 | 1.2660 | 0.7566 | = |
| Angular height | 8 | 0.7804 | 0.0036 | 0.9398 | 0.6533 | 1.3520 | 0.7566 | = |
| Retroarticular process length | 6 | 0.8086 | 0.0147 | 1.0272 | 0.6544 | 1.6125 | 0.9081 | = |
| Retroarticular process width | 5 | 0.9641 | 0.0029 | 1.0218 | 0.7922 | 1.3180 | 0.8560 | = |
| Retroarticular process height | 6 | 0.7650 | 0.0226 | 0.8948 | 0.5448 | 1.4697 | 0.6699 | = |
(+), marginally significant positive allometry; (−), marginally significant negative allometry; +, positive allometry; −, negative allometry; =, isometry; CI, confidence interval; n, size of the variable.