FIGURE 1 in Body length estimation of Neogene macrophagous lamniform sharks (Carcharodon and Otodus) derived from associated fossil dentitions

FIGURE 1. Premise of summed crown width method. (A) Carcharodon carcharias dentition in lingual view, with applicable terminology. The right half is an illustration of the typical dental formula for C. carcharias. The left half is from a 5.18 m female with one less posterior tooth in the lower tooth series (originally figured in Hubbell, 1996; figure 5). Scale bar equals 5 cm. (B) The most complete known associated dentition of Otodus megalodon (CH-31-46P) in lingual view. Scale bar equals 5 cm. (C) Body length of fossil taxa is calculated under the assumption that the ratio of summed crown width to total body length (TL) is proportional in ecologically and taxonomically related species. Silhouette proportions for O. megalodon are based on Cooper et al. (2020). A/a = anterior, I = intermediate, and L/l = lateral. Uppercase letters denote upper teeth and lowercase letters denote lower teeth.