Table 2.
Measurements of 3D reconstructions from CT data of bony labyrinth endocasts of the earliest Eocene dichobunoid artiodactyl Diacodexis ilicis, and of the living tragulid Moschiola meminna
| Diacodexis ilicis | Moschiola meminna | |
|---|---|---|
| Stapedial ratio | 1.78 | 1.41 |
| Cochlear coiling | 720 ° | 990 ° |
| Cochlear spiral length (mm) | 7.35 | 19.00 |
| Cochlear canal volume (mm3) | 6.53 | 20.98 |
| Labyrinth volume (mm3) | 11.77 | 33.08 |
| Cochlear canal aspect ratio | 0.54 | 0.46 |
| Angle lat-ant | 73.00 ° | 89 ° |
| Angle lat-post | 81.00 ° | 97 ° |
| Angle ant-post | 95.00 ° | 84 ° |
| ASC H–W (mm) | 3.49–3.36 | 3.93–4.23 |
| ASC R (mm) | 1.71 | 2.04 |
| ASC L (mm) | 7.35 | 8.50 |
| PSC H–W (mm) | 2.39–3.09 | 3.77–4.06 |
| PSC R (mm) | 1.37 | 1.95 |
| PSC L (mm) | 4.55 | 8.15 |
| LSC H–W (mm) | 2.17–2.79 | 3.43–3.44 |
| LSC R (mm) | 1.24 | 1.71 |
| LSC L (mm) | 7.00 | 8.15 |
ASC, anterior semicircular canal; LSC, lateral semicircular canal; PSC, posterior semicircular canal; following a semicircular canal name: H, height; L, length; R, radius; W, width.