Both: cape ground squirrel; black-and-white ruffed lemur; common rock hyrax
Basel
Ansell’s mole-rat; coypu; Barbary striped grass mouse
Bolivian squirrel monkey; black-handed spider monkey; woolly monkey; red titi; golden lion tamarin; cotton-top tamarin; white-belted black-and-white and black-and-white ruffed lemurs
Meerkat; East African dwarf mongoose; Asian small-clawed otter
Round-eared elephant shrew
Plzen
African brush-tailed, shaggy-crested and Philippine* porcupines; Brazilian porcupine; lowland paca ; black-rumped agouti; east Bolivian highland yellow-toothed cavy: capybara; Desmarest’s hutia; gundi;
Merriam’s kangaroo rat
Acacia rat; Egyptian bushy-tailed gerbil*; bushy-tailed , Wagner’s, Baluchistan dwarf* and Duprasi* gerbil*; Egyptian Sundevall’s*, Mongolian, Syrian* and Persian (rossicus*) jirds; Nile rat; Alpine*, pygmy* and Eurasian field mice; catus deer mouse; hispid cotton rat; Campbell’s desert and golden hamsters; dusky Egyptian, Mount Kulal*, Tibesti, Asia Minor, African, Crete and Palestinian spiny mice; forest giant pouched rat*; roof rat; European harvest mouse; rock cavy; fat sand rat; mesic four-striped and Neumann’s grass rats; xeric four-striped and typical striped* grass mouse; Southern Luzon*, Northern Luzon and Panay bushy-tailed* cloud rats; South African pygmy mouse; Australian water rat; Grandider’s tufted-tailed rat; steppe lemming; greater and lesser Egyptian jerboas; four-toed* jerboa; giant jumping rat; Guenther’s and reed voles; European wood mouse; greater Balkan brush-tailed mouse
Pallas’s squirrel; cape ground squirrel; Siberian and southern flying squirrels; woodchuck; black-tailed prairie dog; fat, Kellen’s African and black-tailed garden dormice;
East African springhare*;
Belanger’s tree-shrew
Lac Alaotra bamboo lemur; red-bellied, common brown, white-fronted, black, collared, ring-tailed and red-fronted lemurs; red ruffed lemur; Goodman’s* and grey mouse lemurs; western fat-tailed dwarf lemur; Senegal (nominate*) and Garnett’s bushbabies; white-faced saki; Southern Bolivian night monkey; western pygmy, common and silvery marmosets; golden-headed lion, red-bellied, bearded emperor, red-mantled saddle-back* and golden-handed tamarins;
Narrow-toed feather-tailed glider; New Guinea ground cuscus*; brush-tail possum; common striped possum*; sugar glider; parma, Tasmanian red-necked and swamp wallabies; dusky pademelon; long-nosed potoroo*; western woyle; eastern quoll, kowari
New Guinea short-beaked echidna
Balabac chevotrain
Big hairy and southern three-banded armadillos
Seba’s short-tailed bat; pale spear-nosed bat*; Pallas’ long-tongued bat; southern long-nosed bat; Gambian epauletted bat; straw-coloured and Egyptian fruit bats; Rodriguez flying fox
Yellow-spotted and Cape rock hyraxes
Hausa genet; Philippine palm civet; Palawan binturong; dark cusimanse; common slender, yellow, banded and dwarf mongooses; eastern ring-tailed vontsira; northern narrow-striped boky; bobcat; Palawan leopard cat; East African bat-eared fox*; Cape fox*; Eurasian otter; South Brazilian coati
Four-toed hedgehog
Greater* and lesser hedgehog tenrecs; tailless tenrec*
I have been to both zoos. Plzen has a far larger and more varied collection of small mammals, but I didn't notice much of a problem in housing for them. I thought that some of the larger animals were in cramped enclosures, such as an ostrich that could barely spread out its wings as he moved outside and the Barbary lions that were kept in a Small Mammal House (!). Plzen has to get my vote for small mammals and I would think its collection would rival that of any other zoo in the world. On my last visit to Basel Zoo, I thought too much space was taken up by domestic animals, but I like the aquarium there and there are some interesting animals in the African House.
I suspect that cutting the number of small mammal species kept at Plzen Zoo would lead to some species not being kept at any zoo. I'd hope that some visitors are interested in some of the obscure mammals at Plzen and that some of the species can be bred, with individuals being sent to other zoos. Ultimately, I think that zoos should concentrate more on breeding small mammals in the zoo and larger mammals in situ, unless zoo-bred large mammals can repopulate wild habitats.