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Université de Fribourg

The hooked element in the pes of turtles (Testudines): a global approach to exploring primary and secondary homology

Joyce, Walter G. ; Werneburg, Ingmar ; Lyson, Tyler R.

In: Journal of Anatomy, 2013, vol. 223, no. 5, p. 421–441

The hooked element in the pes of turtles was historically identified by most palaeontologists and embryologists as a modified fifth metatarsal, and often used as evidence to unite turtles with other reptiles with a hooked element. Some recent embryological studies, however, revealed that this element might represent an enlarged fifth distal tarsal. We herein provide extensive new myological and...