Hisonotus ringueleti Aquino, Schaefer & Miquelarena 2001

Can be distinguished by the following combination of characters: presence of heavy serrae along complete posterior pectoral spine margin; presence of narrow odontode free area along anterior margin of snout; anal fin with 5 branched rays; lateral line canal incomplete and discontinuous with an anterior field bearing 2-7 pores and posterior field with 8-19 pores (Ref. 75967).

Dorsal spines (total): 1; Dorsal soft rays (total): 7 - 8; Analspines: 1; Analsoft rays: 5

Found in between aquatic plants (species of Ludwigia and Potamogeton) and on leaves of terrestrial plants hanging into the water (Ref. 75967). Occurs in a small, shallow creek with muddy soil and clear, slow-flowing water and also in creek with regions of rapid and slow flowing water, with loose stones, and gravel at the bottom and with dense vegetation in the margins (Ref. 75967).

Hisonotus ringueleti is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Uruguay River basin. It is found mainly in vegetated areas inhabited by species belonging to the plant genera Ludwigia and Potamogeton, among others. It occurs in both slow and fast-flowing clear creek environments with a substrate of stones, mud, or gravel. The species reaches 4.3 cm (1.7 inches) SL.