nematocida nematocida nematocida is a genus of microsporidia fungi. one species, n. parisii, is found in wild isolates of caenorhabditis elegans. it has been nicknamed the nematode-killer from paris. this species replicates in the intestines of c. elegans. nematocida scientific classification domain: eukaryota kingdom: fungi division: microsporidia phylum: incertae sedis genus: nematocida species nematocida displodere nematocida parisii nematode cuticle is a cuticle that includes fibers such as keratin, collagen, and some that run around in opposite directions from each other. this has a flexible extracellular exoskeleton structure that has many layers, (but is very stiff) and that has a barrier that helps prevent nematodes from natural and ecological harm that may happen. these may have powerful agents that are used to recognize, attach, penetrate and kill theses parasitic nematodes.