''Pectenocypris nigra'' is a species of small

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of sk ...

from the minnow and carp family,

Cyprinidae Cyprinidae is a family of freshwater fish commonly called the carp or minnow family, including the carps, the true minnows, and their relatives the barbs and barbels, among others. Cyprinidae is the largest and most diverse fish family, and t ...

. It is known only from the very acidic, peaty swamps in central

Sumatra Sumatra () is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the list of islands by area, sixth-largest island in the world at 482,286.55 km2 (182,812 mi. ...

. It has a blackish strip along the flanks of its body which is unique in the genus ''

Pectenocypris ''Pectenocypris'' is a genus of small fish in the family Danionidae endemic to freshwater habitats in Borneo and Sumatra in Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania, between the ...

''.Wibowo, A., Ahnelt, H. & Kertamihardja, E.S. (2016)
''Pectenocypris nigra'', a new danionine species (Teleostei: Cyprinidae: Danioninae) from Sumatra (Indonesia).
''Acta Biologica Turcica, 29 (4): 137-142.''

References

nigra Fish described in 2016 {{Danioninae-stub