Table 3.
Cranial morphometric linear measurements (mean ± SD) of the commensal rodents of Qatar.
| Sl. No. | Parameters * |
Mus musculus (n = 4) |
Rattus norvegicus (n = 86) |
Rattus rattus (n = 18) |
|---|---|---|---|---|
| 1 | General cranial length | 21.9 ± 0.4 | 46.8 ± 4.1 | 37.2 ± 2.7 |
| 2 | Condylobasal length | 21.3 ± 0.1 | 45.2 ± 4.1 | 35.5 ± 2.9 |
| 3 | Henselion-basion length | 18.7 ± 0.4 | 39.1 ± 3.6 | 29.4 ± 2.9 |
| 4 | Henselion-palpation length | 11.2 ± 1.3 | 22.4 ± 2.3 | 16.9 ± 1.7 |
| 5 | Length of upper incisor | 3.3 ± 0.6 | 7.5 ± 1.6 | 5.6 ± 1.0 |
| 6 | Width of upper incisors, basal | 2.1 ± 0.2 | 4.8 ± 0.6 | 3.5 ± 0.5 |
| 7 | Width of upper incisors, apex | 1.3 ± 0.1 | 3.3 ± 0.5 | 2.2 ± 0.4 |
| 8 | Upper incisor to alveolus molar tooth 1 | 6.3 ± 0.4 | 14.4 ± 1.9 | 10.1 ± 1.4 |
| 9 | Length of diastema | 5.9 ± 0.4 | 13.4 ± 1.5 | 9.6 ± 1.2 |
| 10 | Nasal bone length | 7.5 ± 0.6 | 17.2 ± 1.9 | 12.6 ± 1.4 |
| 11 | Breath of nasal bones | 2.2 ± 0.4 | 5.2 ± 0.6 | 3.9 ± 0.3 |
| 12 | Frontal bone length | 7.1 ± 0.4 | 14.7 ± 1.3 | 12.2 ± 1.4 |
| 13 | Frontal bone width | 5.7 ± 1.1 | 10.9 ± 0.6 | 10.3 ± 1.1 |
| 14 | Parietal bone length | 7.3 ± 0.5 | 13.0 ± 1.1 | 11.2 ± 1.0 |
| 15 | Breath of brain cage | 9.8 ± 0.4 | 16.4 ± 2.1 | 16.2 ± 0.6 |
| 16 | Interparietal bone length | 3.2 ± 0.2 | 6.5 ± 0.7 | 5.5 ± 0.6 |
| 17 | Interparietal bone width | 6.7 ± 1.5 | 11.5 ± 1.0 | 10.7 ± 0.8 |
| 18 | Occipital bone length | 4.5 ± 0.4 | 6.0 ± 0.8 | 4.5 ± 0.4 |
| 19 | General cranial height | 7.4 ± 0.1 | 16.6 ± 1.5 | 13.7 ± 0.8 |
| 20 | Rostrum height | 6.3 ± 0.3 | 13.8 ± 1.3 | 10.8 ± 0.9 |
| 21 | Rostrum breathe | 3.5 ± 0.1 | 9.0 ± 1.0 | 6.5 ± 0.7 |
| 22 | Smallest interorbital breadth | 3.4 ± 0.3 | 6.8 ± 0.5 | 5.8 ± 0.4 |
| 23 | Breath of Inferior ramus of the zygomatic process of maxillary | 0.9 ± 0.2 | 1.9 ± 0.3 | 1.5 ± 0.2 |
| 24 | Breath of base zygomatic process of squamosal | 1.5 ± 0.2 | 3.0 ± 0.4 | 2.2 ± 0.4 |
| 25 | Breadth of zygomatic plate | 2.5 ± 0.2 | 5.1 ± 0.6 | 3.7 ± 0.6 |
| 26 | Zygomatic breath | 11.0 ± 0.5 | 22.4 ± 2.3 | 18.2 ± 1.0 |
| 27 | Length of palatal foramen | 4.1 ± 0.6 | 7.8 ± 0.8 | 6.1 ± 0.9 |
| 28 | Smallest palatal breadth | 2.1 ± 0.3 | 4.7 ± 0.6 | 3.6 ± 0.4 |
| 29 | Upper cheek-teeth alveoli | 3.4 ± 0.4 | 7.4 ± 0.4 | 6.7 ± 0.4 |
| 30 | Breadth of upper dental arch | 4.4 ± 0.2 | 9.4 ± 0.7 | 7.6 ± 0.4 |
| 31 | Breadth of molar tooth 1 | 1.1 ± 0.1 | 2.8 ± 1.0 | 2.0 ± 0.2 |
| 32 | Tympanic bulla length | 2.4 ± 0.3 | 8.1 ± 0.6 | 7.1 ± 0.5 |
| 33 | Tympanic bulla width | 3.2 ± 0.1 | 6.0 ± 1.0 | 5.2 ± 0.6 |
| 34 | Foramen magnum width | 3.6 ± 0.3 | 6.9 ± 0.4 | 5.9 ± 0.3 |
* The parameters were measured in millimeters, n: Total observation, SD: Standard deviation of mean.