Predictions of dp1 area (y-axis) based on the inhibitory cascade, expressed as a percentage of the observed area of the first premolar (using dp1s in hyracoids). The area between the horizontal blue lines represents 90–110% of the observed first premolar area. Circles represent individual specimens, boxes middle quartiles, whiskers range.

  Part of: McKay CJ, Welbourn-Green C, Seiffert ER, Sallam H, Li J, Kakarala SE, Bennett NC, Asher RJ (2022) Dental development and first premolar homology in placental mammals. Vertebrate Zoology 72: 201-218.