Pseudancistrus zawadzkii

Pseudancistrus zawadzkii[1] is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Tapajós basin, including the Tracuá River, in Brazil. It is typically found in areas with clear water, rocky outcrops, small waterfalls, and a substrate of rocks and sand. The species reaches 12.9 cm (5.1 inches) SL.[2]

Pseudancistrus zawadzkii
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Siluriformes
Family:	Loricariidae
Genus:	Pseudancistrus
Species:	P. zawadzkii
Binomial name
Pseudancistrus zawadzkii Silva, Roxo, Britzke & Oliveira, 2014

Distribution of several Pseudancistrus species, with P. zawadzkii shown in red.

P. zawadzkii was described in 2014 by Gabriel S. C. Silva, Fábio F. Roxo, and Claudio Oliveira (all of São Paulo State University), as well as Ricardo Britzke (of the National University of San Marcos).[3] Its specific epithet, zawadzkii, refers to Cláudio Henrique Zawadzki, a professor at the State University of Maringá, honoring his contributions to the study of Loricariidae.[2]

P. zawadzkii sometimes appears in the aquarium trade, where it is typically known either as the Tapajós stream pleco or by its associated L-number, which is L-321.[4]