Principal component analysis (PCA) for the first two PC axes obtained using Fourier coefficients of the Cristaria shell shapes. The ‘extreme’ shapes are illustrated by the four synthetic shell outlines. The filled regions show 95% confidence ellipses.

 
 
  Part of: Konopleva ES, Bolotov IN, Vikhrev IV, Inkhavilay K, Gofarov MYu, Kondakov AV, Tomilova AA, Chapurina YE, Van Do T, Pfeiffer JM, Lopes-Lima M, Bogan AE (2023) A freshwater mussel species reflects a Miocene stream capture between the Mekong Basin and East Asian rivers. Zoosystematics and Evolution 99(1): 29-43. https://doi.org/10.3897/zse.99.90784