分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Characiformes (Characins) >
Stevardiidae (Stevardiids) > Xenurobryconinae
Etymology: Ptychocharax: Greek, ptyx, -ychos = fold + Greek, charax = a marine fish without identification (Ref. 45335).
More on authors: Weitzman, Fink, Machado-Allison & RoyeroL..
Issue
Weitzman et al. (1994). See Weitzman & Menezes (1998) for relationships. See Burns et al. (1995) for evidence of insemination.
Environment: milieu / climate zone / 深度上下限 / distribution range
生態學
; 淡水 大洋性. 熱帶
South America: Upper Siapa River in Casiquiare River drainage in Venezuela.
南美洲: Casiquiare 河流域的 Siapa 河上游。
大小 / 重量 / 年齡
成熟度: Lm ? range ? - ? cm
Max length : 6.2 cm SL 雄魚/尚未辨別雌雄; (Ref. 26734)
Inhabits clear streams with sand and granitic rocks bottoms covered by dense mats of the plant Apinaga multibranchiata (Podostemaceae) in areas of fast water. Feeds on larvae of aquatic insects such as simuliids and trichopterans that were found among the podostemacean plants. A few ants and spiders were also found in the stomachs.
在快速水的區域中棲息於清澈溪流，底部為砂質與花崗岩的地方被植物 Apinaga multibranchiata(川苔草) 的密集墊蓋著的。 吃水生昆蟲幼生例如 simuliids 與被發現於 podostemacean 植物中的毛翅目昆蟲。 一些螞蟻與蜘蛛也被發現於腹部。
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
南美洲: Casiquiare 河流域的 Siapa 河上游。
Weitzman, S.H., S.V. Fink, A. Machado-Allison and R. Royero L., 1994. A new genus and species of Glandulocaudinae (Teleostei: Characidae) from southern Venezuela. Ichthyol. Explor. Freshwat. 5(1):45-64. (Ref. 26734)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-1)
無危 (LC) ; Date assessed: 03 October 2020
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Estimates based on models
Phylogenetic diversity index (參考文獻
82804): PD
50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00955 (0.00443 - 0.02057), b=3.06 (2.88 - 3.24), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (參考文獻
69278): 3.3 ±0.42 se; based on food items.
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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