Figure 1. Geographic distribution, habitat, appearance and phylogeny ofAstyanax mexicanus.
(A) Map and sattelite image showing location of A. mexicanus cave morphotype populations used in this study. (B) Image of river in Mexico where A. mexicanus surface fish morphotypes are found. (C) Image of Pachón Cave where A. mexicanus cavefish morphotypes are found. (D-G) Images of surface fish and cavefish (Molino, Pachón, Tinaja) raised in the laboraotry. (H) A. mexicanus phylogeny; Tinaja and Pachón form a monophyletic clade referred to as the “old lineage” (gray shaded area) and Molino and Río Choy surface fish form a monophyletic clade referred to as the “new lineage”. Drawing based on Herman et al (2018).