Table 1 List of arm measurements and proportions of Spirula spirula
From: ‘Arm brains’ (axial nerves) of Jurassic coleoids and the evolution of coleoid neuroanatomy
Arm | Arm diameter [mm] | Axial nerve diameter [mm] | Ratio arm/nerve diameter |
|---|---|---|---|
1 | 1.61 | 0.25 | 6.44 |
2 | 1.45 | 0.27 | 5.37 |
3 | 1.18 | 0.21 | 5.62 |
4 | 1.16 | 0.19 | 6.11 |
5 | 1.22 | 0.22 | 5.55 |
6 | 1.19 | 0.23 | 5.17 |
7 | 1.19 | 0.25 | 4.76 |
8 | 1.15 | 0.21 | 5.48 |
9 | 1.41 | 0.27 | 5.22 |
10 | 1.61 | 0.26 | 6.19 |