最初描述为 Megupsilon aporus:
- Miller, Robert Rush & V. Walters. 1972. "A new genus of cyprinodontid fish from Nuevo Leon, Mexico". Contributions in Science (Los Angeles). (233):1-13 (ffm00211)
保育: Megupsilon aporus 由国际自然保护联盟(IUCN)在濒危物种红色名录中为自然保育而进行了评估 evaluated (EW) 野外灭绝(Extinct in the wild) (1996). Reported extinct in 1994 by Burkhead (2012).