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. 2016 May 9;6:25604. doi: 10.1038/srep25604

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Copyright © 2016, Macmillan Publishers Limited

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Digital reconstruction of the maxillary canal (in green) and maxillary antrum (in purple) based on CT scan images (see Material and Methods). Scale bars = 10 mm. Phylogeny after references Rubidge and Sidor³¹ and Liu and Olsen³³. Lateral views of the skulls with bones transparent. Rostral is to the left. Videos of the CT images of the specimens are available in the Supplementary Information. Abbreviations : Cyn, Cynodontia clade; Prb, Probainognathia clade; Prz, Prozonstrodontia clade; Thr, Therapsida clade.