Email this article The provisional dermal folds in the mouth apparatus of the American paddlefish Polyodon spathula Walbaum, 1858 (Acipenseriformes, Polyodontidae)
- Authors: Tsessarsky A.A.1
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Affiliations:
- Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences
- Issue: Vol 486, No 1 (2019)
- Pages: 131-134
- Section: General biology
- URL: https://journals.eco-vector.com/0869-5652/article/view/13316
- DOI: https://doi.org/10.31857/S0869-56524861131-134
- ID: 13316
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Abstract
The transitory dermal infoldings are described for the first time in front and behind the upper jaw in the larvae and postlarvae of the American paddlefish, Polyodonspathula Walbaum, 1858. In sturgeons these infoldings are necessary for the jaw protraction. In the paddlefishes, they, probably recapitulate the ancestral state. At the same time, the presence of these folds at the larval stages might indicate that the paddlefish larvae possess the protractive jaws. Further developmental studies of the jaw kinematics in Polyodonspathula are needed to test both hypotheses.
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About the authors
A. A. Tsessarsky
Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences
Author for correspondence.
Email: sturiones@gmail.com
Russian Federation, 33, Leninsky prospekt, Moscow, 119071
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