A new wild strain of Caenorhabditis elegans associated with Allograpta exotica (Syrphidae) in Argentina: an update of its ecological niche and worldwide distribution.

Caenorhabditis elegans is a free-living nematode, belonging to the bacterivorous trophic group. Although it was cited in several countries, in different types of ecosystems and in associations with other organisms, the wild habitats of this nematode have not yet been precisely defined. In Argentina, C.