Figures 3-6 from: Deliberalli W, Cansian RL, Mielniczki Pereira AM, Loureiro RC, Hepp LU, Restello RM (2018) The effects of heavy metals on the incidence of morphological deformities in Chironomidae (Diptera). Zoologia 35: 1-7. https://doi.org/10.3897/zoologia.35.e12947

Figures 3-6 Deformities in the mentum of Chironomus (oral cavity): (3) standard mentum; (4) deformed mentum (deletion of teeth); (5) deformed mentum (addition of teeth); (6) deformed mentum (tooth wear).