Classification / Names
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Characiformes (Characins) >
Characidae (Characins; tetras) > Stevardiinae
Etymology: Knodus: Greek, knodon, -ontos = knife, sword (Ref. 45335); figueiredoi: Named for Dr. José Lima de Figueiredo of MZUSP, in appreciation for his contribution to the taxonomic studies of Neotropical fishes..
Environment: milieu / climate zone / depth range / distribution range
पारिस्थितिकी
; स्वच्छ जल, अलवण जल बेनथोपिलाजिक. Tropical
South America: Rio das Gasças, upper Rio Araguaia basin in Brazil.
आकार / वज़न / Age
Maturity: Lm ? range ? - ? cm
Max length : 3.2 cm SL पुल्लिंग / अलिंग; (Ref. 97362)
Short description
आकृति विज्ञान | मौरफोमैटरिक्स
पृष्ठीय सौफट रेज़ (सम्पूर्ण): 10; जानवरों की रीड़ का जोड़: 37 - 39. Knodus figueiredoi differs from all other species of the genus by having only tricuspid teeth in the inner premaxillary row (vs. teeth with 5 or 7 cusps). It can be further distinguished from all its congeners by having i,5,i (vs. i,6,i or i,7) pelvic-fin rays. It can be diagnosed from K. breviceps and K. savannensis in having a conspicuous, round humeral blotch (vs. inconspicuous, vertically elongate). It can be further distinguished from K breviceps in having five (vs. six) longitudinal scale rows between the dorsal-fin origin and lateral line, and from K. savannensis in having branched anal-fin rays 15-17 (vs. 20-21), and a hyaline caudal fin (vs. dark longitudinal band on lower caudal-fin lobe). It can be differentiated from Bryconamericus novae, the only species of the genus in the Araguaia-Tocantins basin, in having a conspicuous, round (vs. inconspicuous, vertically elongate) humeral blotch, 15-17 branched anal-fin rays (vs.18-20); five (vs. four) longitudinal scale rows between the dorsal-fin origin and lateral line; four large tricuspid teeth in the dentary (vs. pentacuspid); and presence of scale rows covering the basal portions of the caudal-fin lobe (vs. absence) (Ref. 97362).
The type locality, Rio das Gasças, is a large and relatively deep river characterized by rapid waters and riffles, marginal sandbanks, and transparent water. The bottom of the river consists of stones, sand and moderate amount of the vegetal debris (Ref. 97362).
Life cycle and mating behavior
परिपक्व अवधि | पुनरुत्पत्ति | मछलीऔ का अंडे देना | अंडे | Fecundity | लार्वा
Esguícero, A.L.H. and R.M.C. Castro, 2014. Knodus figueiredoi, a new characid from the Rio das Garças, upper Rio Araguaia basin, Brazil, with comments on the taxonomic limits with comments on the taxonomic limits Knodus and Bryconamericus (Teleostei: Characidae). Ichthyol. Explor. Freshwat. 25(1):39-48. (Ref. 97362)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
अधिक जानकारी
आम नामउपशब्दचपायचयपरभक्षीईकोटोकसीकोलौजीपुनरुत्पत्तिपरिपक्व अवधिमछलीऔ का अंडे देनाSpawning aggregationFecundityअंडेEgg development
Age/Sizeबाढ़Length-weightLength-lengthLength-frequenciesमौरफोमैटरिक्सआकृति विज्ञानलार्वालारवल गतिकीभर्तीबहुतायतBRUVS
संदर्भजलीयकृषिजलीयकृषि रूपरेखाखींचआनुवंशिकीElectrophoresesहैरेटिबिलटीबीमारीप्रक्रमणNutrientsMass conversion
सहयोगीयोतस्वीरेStamps, Coins Misc.ध्वनिसिगुयटिरारफ्तारतैरने के प्रकारगिल क्षेत्रOtolithsदिमागदृष्टि
साधन
Special reports
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इंटरनेट स्रोत
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01479 (0.00653 - 0.03348), b=2.96 (2.77 - 3.15), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.0 ±0.4 se; based on size and trophs of closest relatives
लौटाव (Ref.
120179): ऊंचा, न्यूनतम जनसंख्या दुगनी समय अवलागत 15 महीने। (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
