Yale University
A new Yale study identifies a distinct species of eyeless cavefish, a discovery that challenges long-held conventional wisdom that caves and other subterranean ecosystems are evolutionary dead ends.
The study shows that three species of Southern cavefish, including the newly discovered species, Typhlichthys styx, evolved from a common ancestor that had adapted to life underground and dispersed through aquifers in soluble subterranean rock formations in the southeastern United States. It provides the best evidence to date that speciation - when a single species splits into two or more species - can occur in species adapted to only survive in subterranean ecosystems.
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