Table 6. T-tests comparing Notharctus distal phalanx morphology to extant primate ungular and grooming phalanges.

Variable		11474a	129382-A	129382-B	143612-03 (dp2)	143612-02 (dp3)	143612-04 (dp4)
BH/GM	U	−0.27	0.69	−0.33	0.62	−0.17	−0.26
	G	−1.17	−0.88	−1.19	−0.91	−1.14	−1.16
TPL/GM	U	1.18	1.46	−0.97	0.14	0.54	0.34
	G	−0.99	−0.77	−2.73	−1.84	−1.51	−1.67
SH-¼/GM	U	1.45	1.42	0.53	*3.61	1.61	1.31
	G	−0.45	−0.47	−0.82	0.41	−0.39	−0.51
SH-¾/GM	U	−0.32	−1.21	0.22	−1.25	−0.49	−0.42
	G	0.98	−0.19	1.69	−0.24	0.76	0.84
BW/GM	U	0.43	0.24	0.56	0.02	0.42	0.76
	G	0.29	0.04	0.48	−0.26	0.28	0.74
SW-¼/GM	U	−0.08	0.49	1.23	−0.06	0.38	0.08
	G	0.08	0.48	1.01	0.09	0.41	0.19
SW-¾/GM	U	0.40	1.84	0.38	2.09	0.86	0.84
	G	0.97	2.66	0.94	2.95	1.50	1.48
FSA	U	0.95	−2.40	0.53	−3.02	−0.02	0.14
	G	*4.58	−0.19	*3.99	−1.08	3.19	3.42
VFL/GM	U	−2.18	−3.04	−1.93	−2.92	−2.49	−2.32
	G	0.59	−1.31	1.16	−1.04	−0.08	0.29
VFL/TPL	U	*−3.17	*−4.14	−1.65	*−3.52	*−3.21	−2.94
	G	1.22	−0.57	*4.01	0.57	1.14	1.65
(SH-¼)/SH(-¾)	U	1.28	2.72	0.01	*4.74	1.64	1.32
	G	−0.96	−0.37	−1.48	0.47	−0.81	−0.94
(SW-¾)/TPL	U	−0.23	0.50	0.58	1.22	0.26	0.32
	G	1.21	2.46	2.59	3.69	2.04	2.15

The results of t-tests comparing Notharctus tenebrosus specimens to ungulae and grooming claw group means. For each variable, the first row (‘U’) is comprised of t-values from comparisons to ungular phalanges; the second (‘G’) from comparisons to grooming phalanges. The smallest absolute t-value indicates which extant group the fossil is most similar to. Asterisks mark significant comparisons at the Bonferroni corrected alpha of 0.0042.

^aAll specimen numbers are from AMNH.

*Significant comparisons (p<0.0042).