Revision of the genus Gonorynchus Scopoli, 1777 (Teleostei : Ostariophysi)

Five valid species of Gonorynchus (Ostariophysi: Gonorynchiformes: Gonorync hidae) are diagnosed on the basis of internal and external morphology (e.g. , vertebrae number, lateral line scale counts, mouth morphology, caudal ske leton morphology). These are Gonorynchus gonorynchus, G. greyi, G. forsteri , G. abbreviatus, and G. moseleyi. A phylogenetic analysis of these species using the outgroups Chanos chanos (a basal gonorynchiform) and dagger Noto goneus osculus (representing the sister group to Gonorynchus) suggests that G, abbreviatus and G. moseleyi form a monophyletic clade, which is, in tur n, the sister group to a clade containing G. greyi, G. gonorynchus, and G, forsteri. Gonorynchus gonorynchus and G. forsteri are sister taxa. This ana lysis represents the first published phylogenetic analysis of the species o f Gonorynchus. A key to the valid species of Gonorynchus is also provided.