Softshell turtle phylogeny 2025
Girard and Joyce 2025
created several cladograms for softshell turtles. They wrote, “Softshell turtles (Pan-Trionychidae) are an early branching clade of hidden-necked turtles (Cryptodira) with a rich fossil record extending back to the Early Cretaceous. The evolutionary history of softshell turtles is still unresolved because of their conservative morphology combined with high levels of polymorphism related to morphological plasticity and ontogeny.”
Oops… wrong outgroup. Carettochelys is a leatherback sister, a hardshell turtle. Trionyx arises from Ocepechelon, Odontochelys , Sphodrosaurus and the small horned pareiasaur, Sclerosaurus . Cladogram here: http://reptileevolution.com/reptile-tree.htm
Great to see the digital graphic segregation DGS used here. Let’s settle on a standard set of colors = bones.
References
Girard LC and Joyce WG 2025. The cranial, mandibular, and hyoid anatomy of softshell turtles (Trionychidae): A revised character list for phylogenetic analysis. The Anatomical Record. https://doi.org/10.1002/ar.70101
Source: https://pterosaurheresies.wordpress.com/2025/12/16/softshell-turtle-phylogeny-2025/
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