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Fig. 3 | BMC Biology

Fig. 3

From: A universal power law for modelling the growth and form of teeth, claws, horns, thorns, beaks, and shells

Fig. 3

Teeth, tooth rows and cusps follow the power cascade. a Eleven teeth in the jaw of Tyrannosaurus rex (UWBM 99000): 0.992 > R2 > 0.999. b Separate cusps on a crabeater seal Lobodon carcinophaga (NMV C7385) postcanine 3: 0.990 > R2 > 0.998. c Human Homo sapiens lower enamel-dentine junction (EDJ) and outer enamel surface (OES) canine and separate EDJ cusps on three lower molars (protoconid (prd) of M2 and M3, thin line; metaconid (med) of M1, M2 and M3, thick line): 0.984 < R2 < 0.998. d All three cusps of the postcanines (PC) 1, 3 and 5 of the leopard seal Hydrurga leptonyx (NMV C31561): 0.995 < R2 < 1.000. e Two incisors, one canine and central cusps of all five postcanines of the leopard seal: 0.997 < R2 < 1.000

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