uncini
From ZooTerms (Dictionary of Invertebrate Zoology)
Annelida: Polychaeta) Deeply embedded seta with only its multidentate head showing above the cuticle.
uncini (noun, plural; singular uncinus; Latin uncinus, hook): 1. (
2. (Mollusca: Gastropoda) Numerous small teeth- or hook-like structures on the radula of plant-eating gastropods.