Psalidodon Dissensus

📖 Overview

Psalidodon Dissensus (Psalidodon dissensus), first described by Lucena & Thofehrn, 2013 is a small fish. Adults typically reach 12.40 cm in maximum length. It inhabits freshwater systems including rivers, streams, and lakes. It occurs in Subtropical waters. It is broadly omnivorous, taking invertebrates, plant matter, and detritus. On the IUCN Red List, it is classified as Least Concern.

🔬 Taxonomy

🐟 Physical Description

Dorsal soft rays (total): 10 - 11; Anal soft rays: 27 - 33; Vertebrae: 35 - 36. This species can be diagnosed from all congeners in the rio Uruguay basin, laguna dos Patos and rio Tramandaí systems, except Astyanax ojiara, by the presence of one heptacuspid tooth on maxillary (vs. tri- to pentacuspid teeth). It differs from other congeners, including species complex A. bimaculatus and A. scabripinnis by the following combination of characters: two humeral spots, the first spot vertically elongate; conspicuous caudal spot; 35-39 perforated lateral line scales; 6-7 scale rows between dorsal-fin origin and lateral line; 22-28 branched anal-fin rays; predorsal region scaled; one heptacuspid maxillary tooth; body depth 37.2-44.2% of SL; and head length 22.7-27.3% of SL). It is distinguished from A. ojiara by the head length 22.7- 27.3% (vs. 27.3-29.5% of SL) and by the presence of hooks on anal fin on males (vs. all fins with hooks) .: fusiform / normal.

🌀 Behaviour

Behavioural data for Psalidodon Dissensus is currently being reviewed.

🦐 Diet

🥚 Reproduction

🌍 Habitat & Distribution

Freshwater; benthopelagic. Subtropical South America: Laguna dos Patos system and rio Uruguay drainage; one specimen from coastal lagoon of rio Tramandaí system.

🌿 Ecology

📐 Morphometrics

🌡️ Water Parameters & Tolerance

🛡️ Conservation Assessment

📊 Population Risk & Fisheries

🐠 Related Species

👥 Community & Contribute