Specimens collected in 1962 (holotype, and paratypes of A. pholeter from left to right) 2011, 2015 and 2018. Notice that there is a progressive reduction in the expression of troglomorphic features. After 2011 the skin was distinctly more pigmented and the barbels and fins were shorter. Eyes are also embedded under a thinner dermal layer of skin. In 2011 the population was highly variable.

  Part of: Espinasa L, Robinson J, Soares D, Hoese G, Toulkeridis T, Toomey III R (2018) Troglomorphic features of Astroblepus pholeter, a cavefish from Ecuador, and possible introgressive hybridization. Subterranean Biology 27: 17-29. https://doi.org/10.3897/subtbiol.27.27098