Knodus Ytuanama

📖 Overview

Knodus Ytuanama (Knodus ytuanama), first described by Ferreira & Ohara, 2023 is a small fish in the family Stevardiidae (order Characiformes). Adults typically reach 8.30 cm in maximum length. It inhabits freshwater systems including rivers, streams, and lakes. It occurs in Tropical waters. It feeds on a mix of small fish and invertebrates as a mid-level predator.

🔬 Taxonomy

🐟 Physical Description

Dorsal soft rays (total): 8; Anal soft rays: 15 - 19; Vertebrae: 37. This species is distinguished from its congeners by the following set of characters: interradial membranes of the caudal fin thickened, forming folds between the branched rays of the upper and lower lobes; absence of a humeral blotch; presence of a dark, wide midlateral stripe extending along the sides of body from the posterior region of opercle to the middle caudal-fin rays; lateral line complete; absence of a dark blotch on the basis of the first five branched dorsal-fin rays; absence of two symmetric, large dark blotches basally on caudal fin lobes absence of lateral line interrupted many times; absence of midlateral stripe extending to lower lobe of caudal fin; a smaller eye, 28.3-35.0% HL; anal-fin length short, 21.4-24.9% SL; and the absence of a modified glandular tissue on the anal-fin lobe in mature males .: fusiform / normal; Cross section: compressed.

🌀 Behaviour

Behavioural data for Knodus Ytuanama is currently being reviewed.

🦐 Diet

🥚 Reproduction

🌍 Habitat & Distribution

Freshwater; benthopelagic. Tropical South America: Brazil.

🌿 Ecology

📐 Morphometrics

🌡️ Water Parameters & Tolerance

📊 Population Risk & Fisheries

🐠 Related Species

🔍 Similar Species

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