Table 1.
Measurements and locomotor agility scores for the 3-D reconstruction of the left inner ear of Notostylops murinus (FMNH P13319).
| Body mass estimate | 3119 |
| Skull length | 99.6 |
| 1Cochlea volume | 28.0 |
| Vestibule volume | 8.8 |
| 2SC volume | 5.4 |
| ASCL | 4.28 |
| ASCW | 3.91 |
| ASCR | 2.05 |
| LSCL | 3.69 |
| LSCW | 3.51 |
| LSCR | 1.80 |
| PSCL | 4.00 |
| PSCW | 4.02 |
| PSCR | 2.01 |
| SCR | 1.95 |
| ASCR agility score | 3.4 |
| PSCR agility score | 3.6 |
| LSCR agility score | 3.9 |
| SCR agility score | 3.7 |
Body mass estimate from Croft (2000), based on this specimen. Skull length was measured from the anterior tip of the bony portion of external nares to the back of the occipital condyles. Locomotor agility scale characterizes the degree of agility of motion and is based on qualitative field observations of extant mammals (Spoor et al., 2007). Agility scores range from 1 to 6, with 1 being extremely slow and 6 being fast. 1Cochlea volume includes aqueductus cochleae, fenestra cochleae, and fenestra vestibuli; 2SC volume includes crus commune and ampullae of semicircular canals. ASC, anterior semicircular canal; LSC, lateral semicircular canal; PSC, posterior semicircular canal; SC, semicircular canal; SCR, average semicircular canal radius; L, length (following a semicircular canal name); W, width (following a semicircular canal name); R, radius (following a semicircular canal name). Mass in g; linear measurements in mm; volumes in mm3.