Nannobrachium nigrum Günther, 1887

– No common name.

The species N. nigrum is regarded as being present off Mainland Portugal (occurrence reported at GBIF: ID 350188791). The specimen was caught at 37º32´31.20” N, 12º57´3.60” W and is deposited at Yale University Peabody Museum (catalogue number YPM ICH 004979).

According to Zahuranec (2000), N. nigrum is found in the tropical Pacific, excluding the Eastern Tropical Pacific Region, throughout the East Indian archipelago as far west as the extreme eastern tropical Indian Ocean. For this reason, the occurrence of N. nigrum is very doubtful and the species was not accounted for in the total number of species in the current list.