Maximum likelihood tree based on available COI sequences. Bootstrap values are shown next to each node. The boxes highlight the close relation between X. barbatus and X. melanopterus.

 
 
  Part of: Terán GE, Méndez-López A, Benitez MF, Serra WS, Bogan S, Aguilera G (2024) Re-description of Xyliphius barbatus (Siluriformes, Aspredinidae), with comments on osteology and distribution. Zoosystematics and Evolution 100(3): 1085-1097. https://doi.org/10.3897/zse.100.121396