sets of mechanosensory and chemosensory organs in the head of nematodes. these organs have 6-fold radial symmetry around the mouth. the cell bodies are anterior to the nerve ring and send dendrites to sensory endings and axons to nerve ring
the mouth is on the left and the sensilla are the long thin tracts that wrap around.
references
Schafer2016
https://www.wormatlas.org/hermaphrodite/neuronalsupport/mainframe.htm