jonklaasi, Gobius Axelrod [H. R.] 1972:F-300.10 (4 pp.), Color Figs. [Exotic tropical fishes. Looseleaf edition.; ref. 22712] Mountain streams, Sri Lanka. Not the same as Sicyopus jonklaasi described as new by Klausewitz & Henrich 1986. •Synonym of Sicyopterus lagocephalus (Pallas 1770) -- (Keith et al. 2019:166 [ref. 36794], Parenti 2021:419 [ref. 38603]). Current status: Synonym of Sicyopterus lagocephalus (Pallas 1770). Oxudercidae: Sicydiinae. Habitat: freshwater, brackish, marine.