Amazon; America, South - Inland waters; Brazil; French Guiana; Negro; Neotropical; Orinoco; South America: Amazon River at Japurá, Orinoco, Maroni, Negro, Trombetas, Tapajós and Canumã River basins.; Suriname
Additional data:
Probably a synonym of Argonectes scapularis (Ref. 12225). A. longiceps was considered older name than A. scapularis (Ref. 598).