分類 / Names
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Characiformes (Characins) >
Characidae (Characins; tetras) > Stevardiinae
Etymology: Rhinopetitia: Greek, rhinos = nose + French, petit = small (Ref. 45335); potamorhachia: From the Greek potamo, meaning river, rhachia, meaning beach, in reference to the fact that most specimens of R. potamorhachia were collected on sandy beaches along the Rio Teles Pires. An adjective.
Environment: milieu / climate zone / depth range / distribution range
生態学
; 新鮮な水 底生の漂泳性. Tropical
South America: Rio Teles Pires, Rio Tapajós basin in Pará, Brazil.
サイズ / 重さ / 年齢
Maturity: Lm ? range ? - ? cm
Max length : 4.4 cm SL オス/雌雄の選別がない; (Ref. 111429); 4.5 cm SL (female)
簡単な記述
検索表 | 形態学 | 形態計測学
背鰭 (合計) : 10; 臀鰭: 18 - 20. Rhinopetitia potamorhachia differs from its only congener, R. myersi Géry 1964, by the presence of distinct dark midlateral body stripe (vs. absence) overlaying an inconspicuous, round humeral blotch (vs. absence of humeral blotch); teeth in both premaxillary tooth rows with
seven to nine cusps and seven or eight cusps on the maxillary teeth (vs. outer series of premaxillary teeth with three cusps and inner series of premaxillary teeth with three to five cusps; maxillary teeth with three to five cusps) (Ref. 111429).
Found along sandy beaches of the Rio Teles Pires in an area significantly affected by the construction of the Teles Pires hydroelectric dam (Ref. 111429).
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Netto-Ferreira, A.L., J.L.O. Birindelli, L.M. Sousa and N.A. Menezes, 2014. A new species of Rhinopetitia Géry 1964 (Ostariophysi: Characiformes: Characidae) from the Rio Teles Pires, Rio Tapajós basin, Brazil. J. Fish Biol. 84(5):1539-1550. (Ref. 111429)
IUCNのレッドリストの状況は (Ref. 130435: Version 2024-2)
Human uses
用具
特記事項
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インターネットの情報源
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01413 (0.00635 - 0.03140), b=2.99 (2.80 - 3.18), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
栄養段階 (Ref.
69278): 3.0 ±0.4 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 高い, １５か月以下の倍増期間の最小個体群 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
