lacinia mobilis
From ZooTerms (Dictionary of Invertebrate Zoology)
lacinia mobilis: 1. (Arthropoda: Crustacea) A small, generally toothed process articulated with the incisor process of the mandible.
2. (Arthropoda: Insecta) A small movable lobe-like process near the extremity of the mandible; a prostheca.
