Timmons and Bray: Age, growth, and sexual maturity of Rhinobatos productus 
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Figure 3 
Examples of band formations in the vertebra of a 125.5-cm guitarfish (A) and a 28.8-cm guitarfish (B). The birth 
mark (b) appeared in all three vertebrae. Band formations (c) were poor towards the outer edge of the centra of the 
larger individual (A), and this individual was not used in the age study. Poor band formations were indicative of 
individual guitarfish with deformed vertebral columns. 
