This contribution contains the 3D models described and figured in the following publication: Hautier L, Gomes Rodrigues H, Ferreira-Cardoso S, Emerling CA, Porcher M-L, Asher R, Portela Miguez R, Delsuc F. 2023. From teeth to pad: tooth loss and development of keratinous structures in sirenians. Proceedings of the Royal Society B. https://doi.org/10.1098/rspb.2023.1932