Sturisomatichthys reinae is a species of catfish in the family Loricariidae.

It is native to South America, where it occurs in the Baudó River basin in Colombia.

The species was described in 2019 by Alejandro Londoño-Burbano (of the Federal University of Rio de Janeiro) and Roberto E. Reis (of the Pontifical Catholic University of Rio Grande do Sul) as part of a taxonomic revision of the genus Sturisomatichthys.

[1] The fish is named in honor of Ruth Gisela Reina (1977–2016), a Colombian-born former curator of fishes, at the Smithsonian Tropical Research Institute in Panama, because of her contributions to the knowledge of fishes and invaluable help and assistance for several ichthyologists around the world; sadly she died rescuing her son on a beach in Colón.

Sturisomatichthys reinae appears in the aquarium trade, where it is frequently referred to as the royal twig catfish.