Thanks Laophil! Surinam, a country with very high biodiversity, has many primate species, and has issued a number of sets, each set usually showing a mix of local and other species:

Different values
Sheetlet of "2x9 Beschermde Primaten" (Protected Primates), with 3 labels in between
SRD1.00
Owl monkey (Aotes trivrigatus)
SRD1.50
Mantled howler (Alouatta pallida)
SRD2.00
White uakari (Cacajao calvus)
SRD2.50
Wooly spider monkey (Lagothrix lagotricha)
SRD3.00
White-faced saki (Pithecia pithecia)
SRD5.00
Maui's marmoset (Callithrix maui)
SRD7.00
Red howler (Alouatta seniculus)
SRD8.00
Gorilla sp (G. gorilla ssp)
SRD9.00
Diana monkey (Cercopithecus diana)
Central labels:
White uakari (Cacajao calvus)
Squirrel monkey (Saimiri sciureus)
Brown capuchin (Cebus apella)

FDCS (2) with split set
1. With 6 of set of 9
Cachet: Colour photograph of red uakari head
2. With 3 of set of 9
Cachet: Colour photograph of owl monkey head
Cancels for both: Orangutan (!) outline; Paramaribo 04 November 2009, Eerste Dag van Uitgifte