A PCA of the body shape of the three cavefish populations. At the end of each axis, the shape obtained by the positive and negative ends was placed. The hullboxes delimit the clusters obtained through K-means analysis. Black hullbox = cluster 1 (surface morph), Filled hullbox = cluster 2 (intermediate individuals), dotted line hullbox = cluster 3 (the most troglomorphic individuals) B comparison of the consensus shape of the El Refugio population (deformation vectors) vs. the consensus shapes of Pachón, Tinaja, and Surface (points) C boxplot of the orbital diameter corrected by the SL for the Surface, Pachón, El Refugio and Tinaja populations.

 
 
  Part of: Miranda-Gamboa R, Espinasa L, Verde-Ramírez MA, Hernández-Lozano J, Lacaille JL, Espinasa M, Ornelas-García CP (2023) A new cave population of Astyanax mexicanus from Northern Sierra de El Abra, Tamaulipas, Mexico. Subterranean Biology 45: 95-117. https://doi.org/10.3897/subtbiol.45.98434