- least shrew
Cryptotis parva
- Val's gundi
Ctenodactylus vali
- Pearson's tuco-tuco
Ctenomys pearsoni
- Rio Negro tuco-tuco
Ctenomys rionegrensis
- social tuco-tuco
Ctenomys sociabilis
- lowland paca
Cuniculus paca
- mountain paca
Cuniculus taczanowskii
- silky anteater
Cyclopes didactylus
- colugos and flying lemurs
Cynocephalidae
- colugos and flying lemurs
Cynocephalidae
- Philippine flying lemur
Cynocephalus volans
- otter civet
Cynogale bennettii
- black-tailed prairie dog
Cynomys ludovicianus
- greater short-nosed fruit bat
Cynopterus sphinx
- hooded seal
Cystophora cristata
