分類 / 名稱
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Siluriformes (Catfishes)
鯰形目 (Catfishes) >
Loricariidae (Armored catfishes)
甲鯰科 (Armored catfishes) > Hypostominae
Etymology: Pseudancistrus: Greek, pseudes = false + Greek, agkistron = hook (Ref. 45335); asurini: The specific name 'asurini', a noun in apposition, is a reference to the Asurini indigenous peoples who inhabit the right margin and median portions of rio Xingu, close to the municipality of Altamira in Pará State, Brazil.
Eponymy: The Asurini are an indigenous people who inhabit the right margin and middle portions of Rio Xingu, near the town of Altamira, Pará, Brazil. (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 居於水底的.
分布
領土 | FAO區域 | 生態系 | 發現紀錄 | 分布圖 | 簡介 | Faunafri
South America: Rio Xingu, Xingu river basin in Pará, Brazil.
大小 / 重量 / 年齡
成熟度: Lm ?  range ? - ? cm
Max length : 25.1 cm TL 雄魚/尚未辨別雌雄; (Ref. 126097); 最大體重: 202.21 g (Ref. 126097)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
背棘 (總數) : 2; 背的軟條 (總數) : 7; 臀棘: 1; 臀鰭軟條: 5. Pseudancistrus asurini is distinguished from all congeners by having whitish dorsal-and caudal-fin tips (vs. entirely dark). It can be further separated from P. reus and P. kayabi by having conspicuous whitish spots on the body (vs. body mottled or with bars in P. reus and with whitish spots that fade along the body and can cover more than one plate in P. kayabi). It also differs from P. depressus and P. barbatus by having the snout with yellowish odontodes (vs. reddish-brown) and from P. nigrescens, P. corantijniensis, and P. zawadzkii by having smaller whitish spots covering the body which increase gradually in size on the head (diameter 0.3?0.8 mm) and further on the body (diameter 0.7?1.3) (vs. spots abruptly increasing size between the head (diameter 1.1?1.3) and the body (di¬ameter 2.6?2.3 mm). Other characters useful to identify this new species include the following: shorter predorsal length, 39?43% SL (vs. 43?46% in P. zawadzkii and 43?45% in P. nigrescens); smaller dorsal pectoral depth, 23?27% SL (vs. 27?31% in P. zawadzkii); smaller caudal pe¬duncle depth, 9?11% SL (vs. 13?14% in P. zawadzkii and 13% in P. nigrescens); short¬er barbel, 5?9% HL (vs. 10?11 in P. nigrescens); and head depth, 57?66% SL, which is smaller than in P. zawadzkii (67?73%) but greater than in P. barbatus (41?53%) (Ref. 99871).
Body shape (shape guide): elongated.
Facultative air-breathing in the genus (Ref. 126274)
生命週期和交配行為
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Silva, G.S.C., F.F. Roxo and C. Oliveira, 2015. Two new species of Pseudancistrus (Siluriformes: Loricariidae) from the Amazon basin, northern Brazil. ZooKeys 482:21-34. (Ref. 99871)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-2 (Global))
人類使用
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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) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.01349 (0.00747 - 0.02436), b=2.97 (2.82 - 3.12), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245). |
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0 |
回復力 (參考文獻 120179) |
中等的, 族群倍增時間最少 1.4 - 4.4年 (Preliminary K or Fecundity.). |
釣魚的脆弱性 (Ref. 59153) |
Moderate vulnerability (35 of 100). 🛈 |