Table 1. Data for observed irreversible group fissions.

n°	Common name	Latin name	Time taken for irreversible fission	Number of individuals (number in each sub-group)	Reference
1	Lemurs	Lemur catta	6 months	37 (22/15)	[31]
2	Rhesus macaque	Macaca mulatta	9 months	28 (18/10)	[43]
3	Barbary macaque	Macaca sylvanus	1 year	87 (50/24/13)	[6]
4	Moor macaque	Macaca maura	10 months	43 (26/17)	[45]
5	Barbary macaque	Macaca sylvanus	9 months	131 (94/37)	[61]
6	Japanese macaque	Macaca fuscata yakui	10 months	54 (21/33)	[44]
7	Japanese macaque	Macaca fuscata	2 years	64 (22/15/27)	[29]
8a	"Alto's group" baboons		2 years	24 (4/14/6)
8b	"Hook's group" baboons		6 months	16 (7/9)
8c	"Lodge group" baboons	Papio cynocephalus	1 month	27 (17/10)	[27]
8d	"Dotty's group" baboons		1 year	16 (7/9)