Tetragonopterus Manaos
📖 Overview
Tetragonopterus Manaos (Tetragonopterus manaos), first described by Urbanski, Melo, Silva & Benine, 2018 is a small fish in the family Characidae (order Characiformes). Adults typically reach 8.20 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 - 29. This species is distinguished from all congeners, except Tetragonopterus ommatus by having a 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. ommatus by the number of maxillary teeth 4-6 (vs. 7-8), with thinner and sharper dentary teeth (vs. more robust) and with greatest body depth 47.5-54.9% of SL (vs. 42.1-44.7% of SL); further differs from all congeners, except T. anostomus, T. denticulatus, T. juruena, T. rarus by the presence of five principal, sharper teeth on dentary (vs. three to four robust teeth); differs from T. anostomus by having a terminal mouth (vs. subsuperior mouth); differs further from T. anostomus, T. araguaiensis by the number of gill rakers of the first gill arch, lower and upper limbs, 13-15 and 8-10, respectively (vs. 17-20 and 10-13, respectively); differs from T. kuluene by having two humeral dark marks (vs. one); differs from T. argenteus by the predorsal scales 7-9 (vs. 11-18); differs from T. chalceus by bearing five thinner and sharper dentary teeth (vs. four robust teeth); differs from T. carvalhoi by the presence of a vertically-oriented dark mark on the caudal peduncle (vs. a lozenge-shaped dark mark); differs from T. rarus, T. georgiae by the presence of 3.5 scale rows between lateral line and pelvic-fin origin (vs. 4.5-5); differs from T. juruena by having 13-15 rakers on the lower limb of the first gill arch (vs. 10-12); differs from T. rarus by the absence of dark longitudinal stripes on the lateral surface of the body (vs. presence) .Cross section: compressed.
🌀 Behaviour
Behavioural data for Tetragonopterus Manaos is currently being reviewed.
🦐 Diet
🥚 Reproduction
🌍 Habitat & Distribution
Freshwater; pelagic. Tropical South America: Brazil (central Amazon).
🌿 Ecology
📐 Morphometrics
🌡️ Water Parameters & Tolerance
📊 Population Risk & Fisheries
🔍 Similar Species
👥 Community & Contribute
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