分类 / Names
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Teleostei >
Characiformes (Characins) >
Acestrorhamphidae (American tetras) > Acestrorhamphinae
Etymology: Astyanax: The name of Astyanax, Hector´s son in the Greek mythology (Ref. 45335); procerus: From the Greek adjective procerus, meaning tall, in reference the high body depth of the species.
Eponymy: Astyanax was the son of Hector in Greek mythology. See Homer’s Iliad for details. The reasoning for its use for a genus of characins is not explained. (Ref. 128868), visit book page.
Environment: milieu / climate zone / 深度上下限 / distribution range
生态学
; 淡水 底中水层性.
South America: upper and middle rio Taquari-Antas and rio Jacuí, laguna dos Patos
system in Rio Grande do Sul, Brazil.
大小 / 重量 / 年龄
成熟度: Lm ? range ? - ? cm
Max length : 11.9 cm SL 雄鱼/尚未辨别雌雄; (Ref. 94153)
简单描述
检索表 | 型态特徵 | 形态测量图
背的软条 (总数) : 10 - 11; 脊椎骨: 36 - 38. This species is distinguished from all congeners in the rio Uruguay basin, laguna dos Patos and rio Tramandaí systems by having the following characters: two humeral spots (vs. one in Astyanax eigenmanniorum, A. sp. aff. fasciatus, A. jacuhiensis, and A. laticeps); first humeral spot vertically elongate with upper portion wider portion narrow and curved, with a pronounced constriction at the junction of both portions (vs. present of oval shape spot with two brown vertical bars in humeral region in A. jacuhiensis, oval shape in A. laticeps and forming a uniform wedge in A. eigenmanniorum and A. henseli); anal fin with 8-23 branched rays (vs. 18 or less in A. rachypterygium and A.cremnobates, 23 or more in A. aramburui, A. paris, A. saguazu, and A. stenohalinus); one maxillary tooth (vs. 2-5 in A. henseli); maxillary teeth tri- to pentacuspid (vs. hexa- to heptacuspid in A. dissensus and A. ojiara); and body depth 38.3-46.0% of SL (vs. smaller than 38% of SL in A. brachypterygium, A. cremnobates, A. obscurus, and A. xiru). It is most similar to A. xiru in color pattern, but it can be differentiated by the pelvic-fin length 16.1-18.7% of SL (vs. 13.6-17.1%), dorsal-fin length 24.1- 28.7% of SL (vs. 21.1-25.4%) and absence of bony hooks on the anal and pelvic fins of males (vs. presence) (Ref. 94153).
Body shape (shape guide): fusiform / normal.
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
De Lucena, C.A.S., J.B. Castro and V.A. Bertaco, 2013. Three new species of Astyanax from drainages of southern Brazil (Characiformes: Characidae). Neotrop. Ichthyol. 11(3):537-552. (Ref. 94153)
世界自然保护联盟红皮书 (Ref. 130435: Version 2025-1)
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Estimates based on models
Phylogenetic diversity index (参考文献
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01096 (0.00493 - 0.02437), b=3.10 (2.93 - 3.27), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
营养阶层 (参考文献
69278): 2.9 ±0.4 se; based on size and trophs of closest relatives
回复力 (参考文献
120179): 高度, 族群倍增时间少于 15个月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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