Table 1. Measurements (mm) of the cranial material of Bellusaurus.
| Element | Measurement | Specimen | Value |
|---|---|---|---|
| Maxilla | Length along ventral margin | IVPP V8299 | 46.6 |
| IVPP V17768.1 | 98.8 | ||
| IVPP V17768.3 | 83.4 | ||
| Height of body below ventralmost point of antorbital fenestra | IVPP V17768.1 | 26.6 | |
| IVPP V17768.3 | 17.4 | ||
| Nasal | Anteroposterior length along midline | IVPP V17768.4 | 65 |
| Maximum width | IVPP V17768.4 | 29.8 | |
| Frontal | Greatest anteroposterior length, along interfrontal suture | IVPP V17768.5 | 48.7 |
| IVPP V17768.6 | 41.2 | ||
| IVPP V17768.7 | 43.6 | ||
| Greatest transverse width, measured from interfrontal suture to lateralmost extent dorsal surface of process for postorbital | IVPP V17768.5 | 49.4 | |
| IVPP V17768.6 | 48.8 | ||
| IVPP V17768.7 | 54.5 | ||
| Combined breadth anteriorly of prefrontal and nasal articulations | IVPP V17768.5 | 32.5 | |
| IVPP V17768.7 | 41.2 | ||
| Anteroposterior diameter of frontoparietal fenestra | IVPP V17768.5 | 10.7 | |
| IVPP V17768.6 | 10.5 | ||
| IVPP V17768.7 | 10.9 | ||
| Parietal | Anteroposterior length along midline | IVPP V17768.5 | 24 |
| IVPP V17768.6 | 28.5 | ||
| IVPP V17768.7 | 24.9 | ||
| Minimum transverse width at supratemporal fenestra | IVPP V17768.5 | 17 | |
| IVPP V17768.6 | 18 | ||
| IVPP V17768.7 | 22 | ||
| Transverse width of supratemporal fenestra | IVPP V17768.5 | 27.5 | |
| IVPP V17768.6 | 28.7 | ||
| IVPP V17768.7 | 19 | ||
| Anteroposterior width of supratemporal fenestra | IVPP V17768.5 | 18.6 | |
| IVPP V17768.6 | 19.6 | ||
| IVPP V17768.7 | 15 | ||
| Squamosal | Maximum dorsoventral height | IVPP V17768.8 | 49.5 |
| Quadrate | Maximum dorsoventral height | IVPP V17768.9 | 63.8 |
| Parabasisphenoid | Length of basipterygoid process along medial edge | IVPP V8299 | 19.4 |
| Proximal anteroposterior breadth of basipterygoid process | IVPP V8299 | 13.9 | |
| Proximal transverse breadth of basipterygoid process | IVPP V8299 | 6.4 | |
| Distal anteroposterior breadth of basipterygoid process | IVPP V8299 | 11.9 | |
| Distal transverse breadth of basipterygoid process | IVPP V8299 | 7 | |
| Angular | Anteroposterior length | IVPP V17768.12 | 117.8 |
| Maximum dorsoventral height | IVPP V17768.12 | 18.6 |
Note:
Underlined values indicate minimum lengths, reflecting incomplete preservation; italicized values are estimations.