Table 1 Absolute body mass, brain mass, and brain structure mass together with brain size (Rbr) and structure (Rstructure) residual values for the Somniosus microcephalus and S. pacificus specimens examined in this study. Residual values were calculated from pGLS models for brain size (n = 117) and brain structure size (n = 84) (note: data on tectum and tegmentum were only available for 69 species). Standard deviations (±SD) provided where three or more specimens were available.
Brain Morphometrics | Species | ||
|---|---|---|---|
Somniosus microcephalus | Somniosus pacificus | ||
Body size | mass (kg) ± SD | 347.67 ± 15.5 | 25.59* |
Brain Size | mass (g) ± SD | 12.64 ± 0.77 | 8.153 |
residual (RBr) | −1.247 | 1.863 | |
Olfactory Bulbs (OB) | mass (g) ± SD | 4.147 ± 0.88 | 2.536 |
residual (ROB) | 2.955 | 1.737 | |
Telencephalon (Tel) | mass (g) ± SD | 2.131 ± 0.40 | 1.260 |
residual (RT) | −3.591 | −1.989 | |
Diencephalon (Di) | mass (g) ± SD | 0.970 ± 0.08 | 0.389 |
residual (RD) | 0.391 | −0.026 | |
Optic Tectum (OT) | mass (g) ± SD | 0.317 ± 0.03 | 0.198 |
residual (ROT) | −0.04 | −0.066 | |
Tegmentum (Tg) | mass (g) ± SD | 0.392 ± 0.03 | 0.367 |
residual (RTg) | −0.340 | −0.215 | |
Cerebellum (Cer) | mass (g) ± SD | 1.611 ± 0.18 | 0.956 |
residual (RC) | −0.607 | −0.473 | |
Foliation Index | 1 | 1 | |
Medulla (Md) | mass (g) ± SD | 3.075 ± 0.23 | 2.449 |
residual (RM) | 1.213 | 0.997 | |
