Tetragonopterus Ommatus
📖 Overview
Tetragonopterus Ommatus (Tetragonopterus ommatus), first described by Silva, Melo, Oliveira & Benine, 2016 is a small fish in the family Characidae (order Characiformes). Adults typically reach 6.60 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): 9; Anal soft rays: 25 - 26; Vertebrae: 30. This species is distinguished from all its congeners by the number of maxillary teeth 7-8 (vs. 1-6) and the dark, vertically-oriented patch of dark pigmentation limited to the posterior portion of the caudal peduncle (vs. mark centered on the caudal peduncle); differs from T. anostomus, T. denticulatus, T. kuluene by the principal teeth on dentary 4 (vs. 5-6) and by having more robust dentary teeth (vs. thinner and sharper teeth); differs from T. anostomus by having a terminal mouth (vs. subsuperior mouth) and by having two conspicuous humeral marks (vs. only one humeral mark); differs from T. anostomus, T. araguaiensis by the number of gill rakers on the of the first gill arch lower (13-15) and upper (8-9) limbs (vs. 17-20 and 10-12, respectively); differs from T. argenteus by the predorsal scales 8 (vs. 11-17); differs from T. carvalhoi by having a rounded dark mark on the caudal peduncle (vs. a lozenge-shaped dark mark); differs from T. rarus, T. georgiae by the scale rows between lateral line and pelvic-fin origin 3.5 (vs. 4.5-5.5); differs from T. rarus by the absence of dark longitudinal stripes on the trunk (vs. presence of stripes) .Cross section: compressed.
🌀 Behaviour
Behavioural data for Tetragonopterus Ommatus is currently being reviewed.
🦐 Diet
🥚 Reproduction
🌍 Habitat & Distribution
Freshwater; pelagic. Tropical South America: Brazil.
🌿 Ecology
📐 Morphometrics
🌡️ Water Parameters & Tolerance
📊 Population Risk & Fisheries
🔍 Similar Species
👥 Community & Contribute
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