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Trichomycterus guaraquessaba is a species of pencil catfish presently only known from Rio Bracinho, a small isolated river in Paraná state, Brazil.

Trichomycterus guaraquessaba
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Siluriformes
Family:	Trichomycteridae
Genus:	Trichomycterus
Species:	T. guaraquessaba
Binomial name
Trichomycterus guaraquessaba Wosiacki, 2005

This is an elongate catfish up to 91.5 centimetres (36.0 in) standard length. It has no unique morphological features and can be distinguished from its congeners by a combination of characters including a uniformly grey colouring with only small dark spots on the flank, pelvic fin not covering the urogenital opening and square-ended caudal fin.

References

• Wosiacki, W. B. (2005). "A new species of Trichomycterus (Siluriformes: Trichomycteridae) from south Brazil and redescription of T. iheringi (Eigenmann)" (PDF). Zootaxa. 1040: 49–64.
• Froese, Rainer; Pauly, Daniel (eds.) (2012). "Trichomycterus guaraquessaba" in FishBase. February 2012 version.

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