Caenorhabditis species 5

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Caenorhabditis sp. 5 is a member of the Elegans group of species, which morphologically resemble C. elegans itself and are closely grouped with it evolutionarily in Clad V (Kiontke et al., 2011). It is a gonochoristic species, requiring mating between males and females for reproduction, and the closest outgroup to the interfertile pair of hermaphroditic C. briggsae and male-female C. sp. 9.

Its geographic distribution is remarkably confined to East Asia, being commonly found in China and northern Vietnam, particularly in habitats with moist decaying vegetation. C. sp. 5 shows strikingly high molecular diversity, assayed by SNP variability (Wang et al., 2010); however, its codon usage patterns are similar to those of C. elegans (Cutter et al., 2008).

Genome Details

Sex Determination: gonochoristic

Haploid No. chromosomes: 6 (5 autosomes, XO)

Genome Assembly

2012-02-02: Sequencing and assembly were performed by Sujai Kumar and Mark Blaxter at the Institute of Evolutionary Biology, University of Edinburgh; preliminary gene models provided by Erich Schwarz, Division of Biology, California Institute of Technology; additional automatic annotation by WormBase.




Cutter, A,D., Wasmuth, J.D., and Washington, N.L. (2008). Patterns of molecular evolution in Caenorhabditis preclude ancient origins of selfing. Genetics 178, 2093-2104. (WBPaper00031967)

Kiontke, K.C., Felix, M.A., Ailion, M., Rockman, M.V., Braendle, C., Penigault, J.B., and Fitch, D.H. (2011). A phylogeny and molecular barcodes for Caenorhabditis, with numerous new species from rotting fruits. BMC Evol. Biol. 11, 339. (WBPaper00040440)

Wang, G.X., Ren, S., Ren, Y., Ai, H., and Cutter, A.D. (2010). Extremely high molecular diversity within the East Asian nematode Caenorhabditis sp. 5. Mol. Ecol. 19, 5022-5029. (WBPaper00037693)