secernenteans
Secernenteans are a large and diverse group of nematodes, a phylum of microscopic roundworms. This taxonomic classification is significant within the nematode family tree, encompassing a substantial proportion of known nematode species. They are characterized by specific anatomical features, most notably the presence of two ventrolateral phasmids, which are sensory organs located on the posterior part of the body. These phasmids are thought to play a role in chemoreception, helping the nematodes detect chemical cues in their environment.
The group includes a wide range of ecologically important nematodes. Many secernenteans are free-living, inhabiting soil,