Ontogenetic Tooth Reduction in Stenopterygius quadriscissus (Reptilia: Ichthyosauria): Negative Allometry, Changes in Growth Rate, and Early Senescence of the Dental Lamina - Fig 1

Image showing A) juvenile Stenopterygius quadriscissus (SMNS 54026) with relatively large, unreduced teeth (specimen mandible length: 368.67 mm). B) Large Adult S. quadriscissus (SMNS 53001), showing highly reduced, non-functional teeth (too short to protrude beyond the dental groove) (specimen mandible length: 523.2 mm). C) Close-up of the teeth seen in the box inset in B. Scale bars: A = 1 cm, B = 5 cm, and C = 1 cm.