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(A) PCD-CT with 3D rendering and segmentation demonstrating the aeration of the meatal recess in the living C. rhombifer. Section levels (A,C,D) of right ear are shown in (B) (insets without segmented ear drum). (A) Extracolumella touches the bony tympanic ring in right ear. The aeration of the meatal chamber underlying the tympanic membrane at the level of the subtympanic foramen is shown in (D).
