Subradular organ explained

The subradular organ is a sensory organ below the grinding mouthparts (radula) of some molluscs, specifically the chitons.^[1] This organ is involved in chemoreception - that is, in judging the nature of food or the substratum. In this sense, it can be considered a 'smell' or 'taste' organ; food is sensed before each stroke of the radula.^[1] Nerve cells from the subradular organ join into the buccal nerves.^[2]

Notes and References

1. P. R.. Fine structure of the subradular organ of Lepidochitona cinereus (L), (Mollusca, Polyplacophora). Boyle. Cell and Tissue Research. 162. 3. 1975. 411–417. 10.1007/BF00220187. 171073. 13584448.
2. Book: Biserova. Natalia M.. Schmidt-Rhaesa. Andreas. Harzsch. Steffen. Purschke. Günter. Structure and Evolution of Invertebrate Nervous Systems. 2015. Oxford University Press. 9780191066214. . 11. Platyhelminthes: Neodermata.