Original description as Neetroplus nematopus:
- Günther, Albert C. L. G. 1867. "On the fishes of the states of Central America, founded upon specimens collected in fresh and marine waters of various parts of that country by Messrs. Salvin and Godman and Capt. J. M. Dow". Proceedings of the Zoological Society of London. 1866, pp. 600-604 (crc00014)
- Neetroplus nicaraguensis Gill, 1877, with type locality at Lake Nicaragua, Nicaragua. Determiner: Rogers, 1981
- Neetroplus fluviatilis Meek, 1912, with type locality at Río Costa Rica near Guapilis (Guápiles), Costa Rica. Determiner: Rogers, 1981
Conservation: Neetroplus nematopus is not evaluated by the international union for the conservation of nature in the iucn red list of threatened species. Most lakes and rivers in Neetroplus nematopus distribution range so far maintain good conditions as fish species are not considered threatened.