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SEM images of the (a) immature, (b) maturing and (c) mature part of the radula. (d and e) Optical micrographs of various stages of maturation of the major lateral tooth: (d) immature stage, (e) transition between immature and maturing and (f) mature stage of the teeth. The SEM and optical images correspond to different radulae, respectively. The red full and dashed circles denote the minor and major cusp of the dominant lateral tooth respectively. The scale bars are 500 μm.
