Sicyopus discordipinnis, of the subfamily Sicydiinae (Oxudercidae), was first described from Papua New Guinea and it was found more recently in Papua, Indonesia, Solomon, Australia and also on the Sahul Shelf. During research on the riverine ichthyofauna of Sulawesi Island, S. discordipinnis was found in four rivers in Banggai Regency, Central Sulawesi Province. These records extend to the west its occurrence and confirm its widespread distribution to Wallacea. This Data Deficient (DD) species may be quite widespread but locally rare and potentially at risk of extirpation.