Thought I might as well update my list to reflect my recent batch of zoo trips with zoogiraffe, bongorob and a few other misfits
Current total: 35 species
1) Stump-tailed Macaque (
Macaca arctoides) at Gentleshaws Wildlife Centre - 28/02/2014
2) Black and White Ruffed Lemur
(Varecia variegata variegata) at Gentleshaws Wildlife Centre - 28/02/2014
3) Grey Mouse Lemur (
Microcebus murinus) at Bristol Zoo - 01/03/2014
4) Aye-aye (
Daubentonia madagascariensis) at Bristol Zoo - 01/03/2014
5) Pygmy Slow Loris (
Nycticebus pygmaeus) at Bristol Zoo - 01/03/2014
6) Lion-tailed Macaque (
Macaca silenus) at Bristol Zoo - 01/03/2014
7) Western Lowland Gorilla (
Gorilla gorilla gorilla) at Bristol Zoo - 01/03/2014
8) Aloatran Gentle Lemur (
Hapalemur aloatrensis) at Bristol Zoo - 01/03/2014
9) Agile Gibbon
(Hylobates agilis) at Bristol Zoo - 01/03/2014
10) Drill (
Mandrillus leucophaeus) at Bristol Zoo - 01/03/2014
11) Ring-tailed Lemur (
Lemur catta) at Wild Place - 01/03/2014
12) Red-bellied Lemur
(Eulemur rubriventer) at Wild Place - 01/03/2014
13) Mongoose Lemur (
Eulemur mongoz) at Wild Place - 01/03/2014
14) Sulawesi Crested Macaque (
Macaca nigra) at Dudley Zoo - 02/03/2014
15) Gelada (
Theropithecus gelada) at Dudley Zoo - 02/03/2014
16) Collared Lemur (
Eulemur collaris) at Dudley Zoo - 02/03/2014
17) Black Lemur (
Eulemur macaco) at Dudley Zoo - 02/03/2014
18) Bornean Orangutan (
Pongo pygmaeus pygmaeus) at Dudley Zoo - 02/03/2014
19) Lar Gibbon (
Hylobates lar) at Dudley Zoo - 02/03/2014
20) Red Ruffed Lemur (
Varecia rubra) at Dudley Zoo - 02/03/2014
21) Common Chimpanzee (
Pan trogolodytes) at Dudley Zoo - 02/03/2014
22) Mandrill (
Mandrillus sphinx) at Chester Zoo - 03/03/2014
23) Sumatran Orangutan (
Pongo abelli) at Chester Zoo - 03/03/2014
24) Red-fronted Lemur (
Eulemur rufifrons) at Chester Zoo - 03/03/2014
25) White-fronted Lemur (
Eulemur albifrons) at Yorkshire Wildlife Park -18/04/2014
26) Brown Lemur (
Eulemur fulvus) at Yorkshire Wildlife Park -18/04/2014
27) Guinea Baboon (
Papio papio) at Yorkshire Wildlife Park -18/04/2014
28) Crowned Sifaka (
Propithecus coronatus) at Cotswold Wildlife Park - 19/04/2014
29) Greater Bamboo Lemur (
Prolemur simus) at Cotswold Wildlife Park - 19/04/2014
30) Montane Purple-faced Langur
(Semnopithecus vetulus monticola) at Cotswold Wildlife Park - 19/04/2014
31) Siamang (
Symphalangus syndactylus) at Cotswold Wildlife Park - 19/04/2014
32) Western Guereza (
Colobus guereza occidentalis) at Cotswold Wildlife Park - 19/04/2014
33) Crab-eating Macaque (
Macaca fascicularis) at Shepreth Wildlife Park - 20/04/2014
34) Grivet (
Chlorocebus aethiops) at Shepreth Wildlife Park - 20/04/2014
35) White-collared Brown Lemur (
Eulemur cinereiceps) at Linton Zoo - 20/04/2014
My non-canonical total - comprising species I have only seen in Germany this year - is 20, as follows:
Greater slow loris (Nycticebus coucang) at Zoo Berlin
Senegal bushbaby (Galago senegalensis) at Zoo Berlin
Common mona monkey (Cercopithecus mona) at Zoo Magdeburg
De Brazza's monkey (Cercopithecus neglectus) at Tierpark Berlin
Diana monkey (Cercopithecus diana) at Tierpark Berlin
Hamlyn's monkey (Cercopithecus hamlyni) at Zoo Berlin
Northern talapoin monkey (Miopithecus ogouensis) at Zoo Magdeburg
Patas monkey (Erythrocebus patas) at Tierpark Berlin
Barbary macaque (Macaca sylvanus) at Tierpark Berlin
Cherry-crowned Mangabey (Cercocebus torquatus) at Tierpark Berlin
Japanese macaque (Macaca fuscata) at Tierpark Berlin
Rhesus macaque (Macaca mulatta) at Zoo Leipzig
Sacred baboon (Papio hamadryas) at Zoo Berlin
Southern pig-tailed macaque (Macaca nemestrina) at Tierpark Berlin
Toque macaque (Macaca sinica) at Zoo Berlin
Peters’s Angolan Colobus (Colobus angolensis palliates) at Zoo Magdeburg
Hanuman Langur (Semnopithecus entellus) at Zoo Berlin
Javan langur (Trachypithecus auratus) at Zoo Berlin
Pileated gibbon (Hylobates pileatus) at Zoo Berlin
Bonobo (Pan paniscus) at Zoo Berlin
As such, I now need only two more species to beat my Old World Primate total for 2013.