Pseudancistrus nigrescens

{{Short description|Species of catfish}}

{{Speciesbox

| taxon = Pseudancistrus nigrescens

| authority = Eigenmann, 1912

}}

File:Zookeys-406-001-g006_(14126050318).jpg

Pseudancistrus nigrescens{{Cite web |title=ITIS - Report: Pseudancistrus nigrescens |url=https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=680339#null |access-date=2022-08-05 |website=www.itis.gov}} is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the upper Potaro River basin in Guyana. The species reaches 18.2 cm (7.2 inches) in total length.{{Cite web |date=2022 |editor-last=Froese |editor-first=Rainer |editor2-last=Pauly |editor2-first=Daniel |title=Pseudancistrus nigrescens |url=https://www.fishbase.de/summary/48123 |website=FishBase}}

P. nigrescens sometimes appears in the aquarium trade, where it is typically referred to either as the headspotted stream pleco or by its associated L-number, which is L-299.{{Cite web |title=Pseudancistrus nigrescens • Loricariidae • Cat-eLog |url=https://www.planetcatfish.com/common/species.php?species_id=839 |access-date=2022-08-05 |website=www.planetcatfish.com |language=en-gb}}