An accepted uniting character of modern cartilaginous fishes (sharks, rays, chimaera) is the presence of a mineralized, skeletal crust, tiled by numerous minute plates called tesserae. Tesserae have, however, never been demonstrated in modern chimaera and it is debated whether the skeleton mineralizes at all. We show for the first time that tessellated cartilage was not lost in chimaera, as has been previously postulated, and is in many ways similar to that of sharks and rays. We presented our work on chimaera mineralized cartilage at SICB 2019 (Seidel et al., 2019. Mineralization in Chimaera Cartilage: Tessellated but not Tesserae? Annual Meeting of the Society of Integrative and Comparative Biology (SICB), 3-7th January 2019, Tampa, USA). And we published a comparative guide to tessellated cartilage in chondrichthyan fishes (sharks, rays and chimaera) in the Journal of the Royal Society Interface, showing that tesserae in Chimaera monstrosa are less regular in shape and size in comparison to the general scheme of polygonal tesserae in sharks and rays, yet share several features with them (e.g. Liesegang lines, hypermineralized ‘spokes’). Chimaera monstrosa’s tesserae, however, appear to lack the internal cell networks that characterize tesserae in elasmobranchs, indicating fundamental differences among chondrichthyan groups in how calcification is controlled (Seidel et al 2020. Endoskeletal mineralization in chimaera and a comparative guide to tessellated cartilage in chondrichthyan fishes (sharks, rays and chimaera). JRSoc. Interface, 17: 20200474).