Table 1.

Cross-species morphometric data.

species	body mass, m (kg)	humeral head radius, Rb (mm)	attachment length, La (µm)	normalized attachment length, La=Rb
mouse	0.03*	2.4**	14.7 ± 4.31	0.0120 ± 0.0036
rat	0.30 ± 0.01	5.16 ± 0.24	29.0 ± 4.0	0.010 ± 0.001
rabbit	4.24 ± 0.23	12.3 ± 0.4	26.2 ± 2.7	0.0042 ± 0.0003
dog	21.7 ± 2.4	31.4 ± 1.0	39.3 ± 9.0	0.0025 ± 0.0006
pig	43.3 ± 2.3	40.0 ± 2.4	43.6 ± 16.4	0.0022 ± 0.0008

Data from Deymier-Black et al. (2015), Pollock and Shadwick (1994), and Gàlvez-López and Casinos (2012). In computing the variances of ratios, attachment lengths were assumed to be independent of humeral head radius.

Notes:

^*average mass,

^**average diameter