The fantastic diversity of shark tooth shapes has been studied in relation to the evolutionary history and ecological traits of this iconic group (Bazzi et al., 2018). Functionally, convergent tooth shapes between the bonnethead sharks Sphyrna tiburo (Sphyrnidae) and horn sharks (Heterodontidae) were associated with the hard prey they feed on (Wilga and Motta, 2000). On the other hand, a strong phylogenetic signal arose from the analysis of the whole dentition of Lamniforms, which have a unique symphyseal to commissural toothtype patterning (Shimada, 2002, 2005). For this reason, tooth shape is one of the main supports for establishing taxonomic groups and phylogenetic relationships between fossil and extant elasmobranchs (sharks and batomorphs)
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