Descripción original como Etheostoma segrex:
- Norris, Steven & R.R. Miller. 1997. "Two new species of Etheostoma (Osteichthyes: Percidae) from Central Coahuila, northern México". Ichthyological Explorations of Freshwaters. 8(2):159-176 (ffm00339)
Conservación: Etheostoma segrex no es evaluada en la lista roja de especies amenazadas de la Unión Internacional para la Conservación de la Naturaleza. This species has not been found after an extensive search at the type locality and other associated areas during 2013. It is at least in a very precarious condition, and probably extinct.