分类 / 名称
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Characiformes (Characins) >
Stevardiidae (Stevardiids) > Diapominae
Etymology: Knodus: Greek, knodon, -ontos = knife, sword (Ref. 45335); borari: Name 'borari' in honor of Boraris, the indigenous group inhabiting the lower Rio Tapajos. A noun of apposition.
环境:氛围 / 气候带 / 深度上下限 / 分布范围
生态学
; 淡水 底中水层性.
分布
领土 | FAO区域 | 生态系 | 标本纪录 | 分布图 | 简介 | Faunafri
South America: Brazil.
大小 / 重量 / 年龄
成熟度: Lm ?  range ? - ? cm
Max length : 3.5 cm SL 雄鱼/尚未辨别雌雄; (Ref. 137788)
简单描述
检索表 | 型态特徵 | 形态测量图
背的软条 (总数) : 8; 臀鳍软条: 17 - 19; 脊椎骨: 35. This species is distinguished from its congeners by the following set of characters: presence of only conical to tricuspid teeth in the inner pre maxillary row and dentary teeth; short maxilla, not exceeding the anterior margin of the orbit in a vertical plane; presence of a black blotch at the base of caudal fin and i,6,i pelvic-fin rays; 6 scales between dorsal-fin origin and lateral line; 13-14 circumpeduncular scales; and short snout(19.6%-22.5%LH) (Ref. 137788).
Body shape (shape guide): elongated; Cross section: compressed.
This species inhabits a moderately fast-flowing stream, 13 meters wide and 1-3 meters deep, with a substrate predominantly composed of rocks, gravel and sand (Ref. 137788).
生命周期和交配行为
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
Silva-Oliveira, C., A.L.C. Canto and F.R.V. Ribeiro, 2023. Knodus borari, a new species from the lower Rio Tapajos basin (Characiformes: Characidae). J Fish Biol. 103:136-142. (Ref. 137788)
世界自然保护联盟红皮书 (Ref. 130435: Version 2025-2 (Global))
人类利用
渔业: 没有兴趣
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特别资料
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基于模型的估算
系统发育多样性指数 (参考文献
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00776 (0.00343 - 0.01757), b=3.10 (2.91 - 3.29), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
营养阶层 (参考文献
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
渔业脆弱性 (Ref.
59153): Low vulnerability (10 of 100).
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