分類 / 名稱
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Characiformes (Characins) >
Serrasalmidae (Piranhas and pacus) > Myleinae
Etymology: Utiaritichthys: A waterfall in Papagayo river, Matto Grosso, named Utiariti in Campo Novo do Paresis, Sapezal; esguiceroi: Named for André L. H. Esguícero, who collected the holotype and paratypes of the new species.
Eponymy: Dr André Luiz Henríques Esguícero (d: 1980) is a Brazilian ichthyologist. [...] (Ref. 128868), visit book page.
環境： 環境 / 氣候帶 / 深度上下限 / 配送範圍
生態學
; 淡水 底中水層性.
South America: Rio Juruena, Tapajós drainage, upriver of Salto de Utiariti (waterfall) in Mato Grosso State, Brazil.
大小 / 重量 / 年齡
成熟度: Lm ? range ? - ? cm
Max length : 26.0 cm SL 雄魚/尚未辨別雌雄; (Ref. 96883)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
背的軟條 (總數) : 23; 脊椎骨: 35. Utiaritichthys esguiceroi is distinguished from its congeners by having 99-101 perforated scales on the lateral line (vs. 69-72 in U. sennaebragai, and 78-82 in U. longidorsalis), 17-19 prepelvic spines (vs. 9-10 in U. sennaebragai, and 28-31 in U. longidorsalis), 20-21 postpelvic spines (vs. 15-17 in U. sennaebragai, and 14 in U. longidorsalis), and 23-25 circumpeduncular scales (vs. 30-48 in U. sennaebragai, and 33-35 in U. longidorsalis). It can be further diagnosed from U. longidorsalis by having larger interdorsal width 11.8-15.6 % of SL (vs. 7.1-7.9% of SL), and larger adipose-fin base length 4.2-5.8 % of SL (vs. 3.7-3.8% of SL) (Ref. 96883).
Adults swim in the main river channel of Rio Juruena, mostly in riffles and rapids. Juveniles occur in calm portions of the Rio Juruena, usually near the margins. Juveniles were reported to feed on aquatic and terrestrial insects and particulate organic matter, while adults almost exclusively on Podostemaceae macrophytes and filamentous algae, both typical of riffles and rapids (Ref. 96883).
生命週期和交配行為
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Pereira, T.N.A. and R.M.C. Castro, 2014. A new species of Utiaritichthys Miranda Ribeiro (Characiformes: Serrasalmidae) from the Serra dos Parecis, Tapajós drainage. Neotrop. Ichthyol. 12(2):397-402. (Ref. 96883)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-2 (Global))
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基於模型的估計
系統發育多樣性指數 (參考文獻
82804): PD
50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02399 (0.01109 - 0.05190), b=2.99 (2.80 - 3.18), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
回復力 (參考文獻
120179): 高度, 族群倍增時間少於 15個月 (Preliminary K or Fecundity.).
釣魚的脆弱性 (Ref.
59153): Low vulnerability (22 of 100).
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