Leydig cells
From ZooTerms (Dictionary of Invertebrate Zoology)
2. (Arthropoda: Insecta) In Hymenoptera, produces an attractant pheronome in Apis; mandibular gland and Koshevnikov gland.
3. (Mollusca: Gastropoda) In Prosobranchia, cells in the mantle, foot and around the digestive tract.