Table 1. Dimensions of the howler monkey optic disk (papila) along the dorsoventral (DV) and nasotemporal (NT) dimensions (N = 5) and the distance from the center of the optic disk to the foveal pit (N = 6).

Retina	Papila (DV) (mm)	Papila (NT) (mm)	Papila – Fovea (mm)
AC 01LM	1.35	1.18	3.43
AC 02LM	1.35	1.27	3.19
AC 03LM	-	-	2.89
AC 04LM	1.46	1.23	3.28
AC 05LM	1.35	1.35	3.23
AC 05RM	1.27	1.10	3.06
Mean	1.38	1.23	3.18
Standard deviation	0.07	0.09	0.18

AC, Alouatta caraya. R, right retina. L, left retina. M, retina from a male howler monkey.