C. nanus may refer to: Cercartetus nanus, the eastern pygmy possum, a marsupial species found in south-eastern Australia Cerion nanus, an air-breathing land snail species Choristotanyderus nanus, an extinct protodipteran insect species living in the Permian period Cisticola nanus, the tiny cisticola, a bird species found in Ethiopia, Kenya, Somalia and Sudan Colobocarpos nanus, a plant species native to Laos and Northern Thailand Corydoras nanus, a tropical freshwater fish species See also Nanus (disambiguation)