分类 / 名称
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Siluriformes (Catfishes) >
Loricariidae (Armored catfishes) > Hypostominae
Etymology: Ancistrus: Greek, agkistron = hook (Ref. 45335); megacanthus: Name 'megacanthus' from the Greek words 'megas' and 'akanthos', meaning 'large, great' and 'thorn, spine', referring to the large pectoral-fin spines of the new species. A noun in apposition.
环境：氛围 / 气候带 / 深度上下限 / 分布范围
生态学
; 淡水 居于水底的.
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 : 12.4 cm SL 雄鱼/尚未辨别雌雄; (Ref. 132443)
简单描述
检索表 | 型态特徵 | 形态测量图
背棘 (总数) : 2; 背的软条 (总数) : 7; 臀鳍软条: 4. This species is distinguished by the following set of characters: well developed snout tentacles, pectoral-fin spine long, and exceeding half length of the pelvic-fin leading ray in males; dorsal and caudal fins plain dark brown to black, without lighter spots or bands; dark brown to black background body color; small white to yellow dots on dorsal surface; four branched rays on the anal fin (Ref. 132443).
Body shape (shape guide): elongated; Cross section: flattened.
Facultative or obligate air-breathing ; The species inhabits creeks at elevations near 100 meters, with swift waters lined with rocks and gravel. These water bodies are located within the Pampa biome, in a savanna landscape dominated by herbaceous vegetation. Trees primarily confined to riverbanks with soils composed of clay and gravel (Ref. 132443).
生命周期和交配行为
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
Widholzer, R.L., J. Borsoi, R.E. Reis and A.P. Lehmann, 2024. A new species of Ancistrus (Siluriformes: Loricariidae), with a redescription of Ancistrus brevipinnis and further evidence of hidden diversity in the laguna dos Patos system, Brazil. Neotrop. Ichthyol. 21(4):e230078. (Ref. 132443)
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
工具
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=0.01479 (0.00636 - 0.03440), b=2.98 (2.80 - 3.16), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
回复力 (参考文献
120179): 中等的, 族群倍增时间最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
渔业脆弱性 (Ref.
59153): Low vulnerability (10 of 100).
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