Evo-Devo of chondrichthyans


Tooth shape

Tooth shape

Tooth & odontode

Evolution of mineralizing cells
in chondrichthyans


Fidji Berio
Scyliorhinus head

I have a Master degree in marine ecology and I am currently doing my PhD in evo-devo on cartilaginous fishes, especially on catsharks (scyliorhinids). I try to describe their tooth shape diversity using microCT scans, 3D geometric morphometrics, and machine learning. Then, I am deciphering what drives such diversity, including physical and molecular parameters. I work under the co-supervision of Nicolas Goudemand and Mélanie Debiais-Thibaud. I also work on the axial regionalisation of the vertebral column of skates, on the evolutionary history of mineralising cells in chondrichthyans, and on chimaera husbandry in aquaria. I participated to the organization of the Comparative Cartilage Biology meeting.


Journal publications

F. Berio, Y. Bayle, C. Riley, O. Larouche & R. Cloutier (2021). Phenotypic regionalization of the vertebral column in the thorny skate Amblyraja radiata: stability and variation. — Journal of Anatomy.

F. Berio, M. Broyon, S. Enault, N. Pirot, F. A. López-Romero & M. Debiais-Thibaud (2021). Diversity and Evolution of Skeletal Tissues in Chondrichthyans. — Frontiers in Ecology and Evolution, 9, 223.

F. Berio, A. Evin, N. Goudemand & M. Debiais-Thibaud (2020). The intraspecific diversity of tooth morphology in the large-spotted catshark Scyliorhinus stellaris: insights into the ontogenetic cues driving sexual dimorphism. — Journal of Anatomy, 237(5), 960-978.

F. Berio & Y. Bayle (2020). Scyland3D: Processing 3D landmarks. — Journal of Open Science Software.

F. Berio & M. Debiais-Thibaud (2019). Evolutionary developmental genetics of teeth and odontodes in jawed vertebrates: A perspective from the study of elasmobranch fishes. — Journal of Fish Biology, 1-13.

Scientific talks

F. Berio & M. Debiais-Thibaud (2020). Diversity and evolution of mineralized neural arches in cartilaginous fishes (Chondrichthyans). — Tomography for Scientific Advancement Symposium, Online conference.

F. Berio, S. Enault, M. Debiais-Thibaud (2019). Histological description of cell types involved in the chondrichthyan skeletogenesis. — Comparative Cartilage Biology meeting, Banyuls-sur-mer, France.

F. Berio, A. Evin, M. Debiais-Thibaud & N. Goudemand (2018). Tooth shape variation in the large-spotted catshark Scyliorhinus stellaris.10th Symposium on Morphometry and Evolution of Forms, Bordeaux, France.

Scientific posters

F. Berio, A. Evin, M. Debiais-Thibaud & N. Goudemand (2018). A sex- and stage- dependent smile: Exploring tooth shape variation in the large-spotted catshark. — Doctoral School, Public Prize.

F. Berio, A. Evin, M. Debiais-Thibaud & N. Goudemand (2018). Intra- and interspecific tooth shape variation in sharks: Phenotypic plasticity and developmental constraints on tooth evolution. — 7th EuroEvoDevo, Galway, Ireland & Evolution, Montpellier, France.


Chelonia midas

Scuba diving
Level 2 FFESSM


Marine biology
and conservation