Range extension for Lacantunia enigmatica Rodiles-Hernández, Hendrickson & Lundberg, 2005 (Siluriformes, Lacantuniidae) in the Usumacinta River Basin, Guatemala

" The Lacantun catfish, Lacantunia enigmatica, is reported for the first time in the Usumacinta River Basin in Guatemala. Two specimens were collected in the Usumacinta tributaries Río La Pasión and Río Negro, characterized by seasonally fast-flowing deep channels and high water-level fluctuations. We present a map with new records, and a brief description and images of the specimens collected "