Table 1.

Adductor muscle masses, PCSs and forces produced by the adductor muscles

Species	Muscle
	SM	ALM	PLM	ZM	PM	T	PI
M. monax (n = 2)
Mass, mean, g	7.24	4.44	5.68	1.27	0.21	9.20	2.82
Mass, SD, g	1.14	1.57	2.57	0.24	0.21	3.04	1.62
Mass, mean, %	24	14	18	4	1	30	9
Mass, SD, %	3	1	3	1	1	1	1
PCS, mean, cm2	4.17	2.25	4.48	1.04	0.15	5.27	5.05
PCS, SD, cm2	0.17	0.43	0.95	0.24	0.15	0.22	0.63
Force, mean, kg	10.42	5.62	11.19	2.60	0.38	13.18	12.62
Force, mean, %	19	10	20	5	1	24	23
Force, SD, %	2	1	3	1	1	3	1
A. rufa (n = 4)
Mass, mean, g	1.78	0.60	2.67	0.92	0.23	3.64	0.84
Mass, SD, g	0.20	0.19	0.61	0.18	0.09	0.83	0.11
Mass, mean, %	17	6	25	9	2	34	8
Mass, SD, %	1	2	2	2	1	4	2
PCS, mean, cm2	1.12	0.44	1.99	0.69	0.25	3.01	2.11
PCS, SD, cm2	0.16	0.21	0.58	0.15	0.14	0.60	0.65
Force, mean, kg	2.79	1.11	4.98	1.73	0.63	7.53	5.27
Force, mean, %	12	5	21	8	3	29	23
Force, SD, %	1	2	4	2	2	3	2
T. thomomys
Mass, mean, g	0.08	0.34	0.11	0.02	0.02	0.20	0.04
Mass, mean, %	10	42	14	2	2	25	5
PCS, mean, cm2	0.10	0.44	0.24	0.05	0.05	0.41	0.09
Force, mean, kg	0.26	1.11	0.59	0.12	0.13	1.02	0.22
Force, mean, %	7	32	17	4	4	30	6
R. affinis
Mass, mean, g	1.41	1.55	1.06	0.04	0.04	1.69	0.61
Mass, mean, %	22	24	17	1	1	26	10
PCS, mean, cm2	1.39	1.45	1.11	0.05	0.06	1.76	1.61
Force, mean, kg	3.47	3.64	2.77	0.11	0.16	4.40	4.03
Force, mean, %	19	20	15	1	1	24	22
S. variagatoides
Mass, mean, g	0.04	0.06	0.05	0.01	0.01	0.06	0.03
Mass, mean, %	15	23	19	4	4	23	12
PCS, mean, cm2	0.04	0.07	0.06	0.03	0.01	0.07	0.04
Force, mean, kg	0.11	0.17	0.16	0.06	0.03	0.18	0.09
Force, mean, %	14	22	19	8	4	23	11
T. eutamias
Mass, mean, g	0.08	0.08	0.05	0.03	0.01	0.08	0.04
Mass, mean, %	22	22	14	8	3	22	11
PCS, mean, cm2	0.14	0.13	0.12	0.05	0.04	0.11	0.11
Force, mean, kg	0.36	0.33	0.29	0.14	0.10	0.28	0.28
Force, mean, %	20	19	16	8	6	16	16
C. cywomys
Mass, mean, g	1.92	0.90	0.73	0.25	0.16	1.53	0.72
Mass, mean, %	31	14	12	4	3	25	12
PCS, mean, cm2	1.38	0.60	0.60	0.25	0.19	1.18	1.22
Force, mean, kg	3.44	1.49	1.51	0.61	0.46	2.96	3.05
Force, mean, %	25	11	11	5	3	22	23