Extended Data Fig. 8: Comparative canine dimensions.

a, Bivariate plot of canine crown dimensions for LD 760 and comparative taxa. The LD 760 specimen falls within the size ranges of early Homo and Australopithecus but not Paranthropus. MD – mesiodistal; LaL – labiolingual. b, Ratio of MD/LaL measurements (mm) on the y-axis as a representation of shape variation for the LD 760 canine and comparative taxa. Authors’ data supplemented by references in Extended Data Table 1. MD – mesiodistal; LaL – labiolingual. c, Maxillary canine area (mm²) on the y-axis as a representation of size variation for the LD 760 canine and comparative taxa. Authors’ data supplemented by references in Extended Data Table 1. d, Upper canine MD length (mm) to lower molar MD length (mm) ratios for individuals preserving the maxillary canine and mandibular M1 and/or M2 for early Homo; Australopithecus (A. afarensis, A. africanus); and Paranthropus (P. boisei and P. robustus). The LD 760 canine/molar ratios do not fall within the Paranthropus range but are within the distribution for Australopithecus and Homo ratios. Authors’ data supplemented by references in Extended Data Table 1.