Architectural measurements for each specimen^*

Specimen	Sex	TLS length (mm)	Iliocostalis						Longissimus						Multifidus
			MWt (g)	NLb (mm)	NLf (mm)	Pinnation Angle (θ)	PCSA (cm2)	TL (mm)	MWt (g)	NLb (mm)	NLf (mm)	Pinnation Angle (θ)	PCSA (cm2)	TL (mm)	MWt (g)	NLb (mm)	NLf (mm)	Pinnation Angle (θ)	PCSA (cm2)	TL (mm)
G. senegalensis	M	89.1	0.2938	69.07	37.59	3.36	0.0739	67.91	1.283	91.89	35.20	4.53	0.3440	72.67	0.0488	37.47	21.87	5.36	0.0210	22.94
W. Jungers collection
G. senegalensis	M	112	1.1786	90.55	34.71	4.79	0.3203	64.54	0.7065	113.43	40.96	6.69	0.1622	79.10	0.122	35.28	18.85	2.73	0.0612	23.39
W. Jungers collection
G. senegalensis	M	97	0.55	80.64	29.51	4.23	0.1759	63.24	0.6438	97.66	33.98	5.47	0.1785	77.71	0.1516	39.55	21.65	4.07	0.0661	20.55
W. Jungers collection
G. senegalensis	M	104	1.0728	77.21	24.57	2.27	0.4129	54.51	1.285	105.68	33.28	4.63	0.3643	69.85	0.1496	39.90	21.61	2.96	0.0655	23.73
W. Jungers collection
N. coucang	F	151.8	0.3341	99.07	18.44	7.5	0.1700	15.15	0.8666	140.35	20.05	8.16	0.4050	16.00	0.2326	60.37	10.13	5.92	0.2163	8.80
NMNH 297828
N. coucang	M	165	1.8444	112.77	14.36	7.12	1.2063	12.76	3.9425	152.41	13.79	6.3	2.6896	12.43	0.3832	62.60	6.62	4.18	0.5465	5.23
NMNH 502559
N. coucang	M	154	0.4326	111.22	18.63	5.85	0.2186	14.75	1.0568	145.57	21.09	6.13	0.4716	16.58	0.0238	54.99	9.79	4.61	0.0229	8.43
J. Hanna collection
N. coucang	M	160	0.9856	102.16	21.79	7.56	0.4244	16.57	2.7221	143.20	17.22	10.98	1.4692	13.33	0.552	65.37	12.32	5.11	0.4225	9.85
DLC 1906 m

NMNH, National Museum of Natural History, Washington, DC; DLC, Duke Lemur Center.

^*See Table1 for variable definitions.