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A″–C″. Dorsal view of unstained Xenopus cranium demonstrates gross morphology, 0.7× magnification. D″–F″. Alizarin red and Alcian blue whole-mount staining of cranial skull. G″–I″. μCT scans delineate ossified portions of cranium. Ossification is complete by Stage 64–66. Labelling based on Trueb and Hanken, FP: frontoparietal.
