Small non-coding RNAs in C. briggsae and other Caenorhabditis nematodes

siRNA (small interfering RNA) - 22nt and 26nt (mostly)

piRNA (piwi-interacting RNA) - 21nt long

miRNA (micro RNA) - ~22nt long

miRNA families Source: Shi et al., Genome Research 2013 Table (PDF version) 84 C. briggsae 106 C. elegans 85 C. remanei 87 C. brenneri Source: miRBase C. briggsae micro RNA C. elegans micro RNA C. remanei micro RNA