''Oreoglanis macronemus'' is a species of sisorid

catfish Catfish (or catfishes; order Siluriformes or Nematognathi) are a diverse group of ray-finned fish. Named for their prominent barbels, which resemble a cat's whiskers, catfish range in size and behavior from the three largest species alive, ...

. It is known only from four preserved specimens collected from the

Xiangkhoang Plateau The Xiang Khouang Plateau or Xiang Khwang Plateau, also known in French as Plateau dTran-Ninh'' is a plateau in the north of Laos. The landscape is characterized by green mountains, rugged karst formations and verdant valleys with plenty of rivers, ...

, northern

Laos Laos (, ''Lāo'' )), officially the Lao People's Democratic Republic ( Lao: ສາທາລະນະລັດ ປະຊາທິປະໄຕ ປະຊາຊົນລາວ, French: République démocratique populaire lao), is a socialist ...

, by an expedition led by

Jean Théodore Delacour Jean Théodore Delacour (26 September 1890 – 5 November 1985) was a French ornithologist and aviculturist. He later became American. He was renowned for not only discovering but also rearing some of the rarest birds in the world. He establish ...

in the mid-1920s and misidentified as '' Euchiloglanis sp''. These specimens are in the Natural History Museum,

London London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a majo ...

. This is a very small catfish (the largest specimen, a male, has a

standard length Fish measurement is the measuring of individual fish and various parts of their anatomies. These data are used in many areas of ichthyology, including taxonomy and fisheries biology. Overall length * Standard length (SL) is the length of a fish m ...

of ), generally smaller than most other ''Oreoglanis'' species (although the small sample size makes this distinction largely irrelevant). The main difference between this species and its congeners is its extremely long nasal barbels, almost half the length of the head.

References

Further reading