Evolution of paedomorphism through time in selected plesiosaurian clades for 2 Ma time bins. Geological time in Ma is represented in the x-axis and I/(M+P) in the y-axis. Higher I/(M+P) values indicate higher proportion of osteological immature specimens.

 
 
  Part of: Araújo R, Smith AS (2023) Recognising and quantifying the evolution of skeletal paedomorphosis in Plesiosauria. Fossil Record 26(1): 85-101. https://doi.org/10.3897/fr.26.97686