doi: 10.1038/s41586-018-0419-1. Epub 2018 Aug 22.
A Triassic stem turtle with an edentulous beak
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- PMID:30135526
- DOI: 10.1038/s41586-018-0419-1
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A Triassic stem turtle with an edentulous beak
Chun Li et al. Nature.2018 Aug.
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Abstract
The early evolution of turtles continues to be a contentious issue in vertebrate palaeontology. Recent reports have suggested that they are diapsids1-6, but the position of turtles within Diapsida is controversial7-12 and the sequence of acquisition of turtle synapomorphies remains unclear1-3. Here we describe a Triassic turtle from China that has a mixture of derived characters and plesiomorphic features. To our knowledge, it represents the earliest known stem turtle with an edentulous beak and a rigid puboischiadic plate. The discovery of this new form reveals a complex early history of turtles.
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