Klassifizierung / Names
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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..
Taxonomic Remarks
Weitzman et al. (1994). See Weitzman & Menezes (1998) for relationships. See Burns et al. (1995) for evidence of insemination.
Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet
Ökologie
; süßwasser pelagisch. Tropical
South America: Upper Siapa River in Casiquiare River drainage in Venezuela.
Größe / Gewicht / Alter
Geschlechtsreife: Lm ?  range ? - ? cm
Max length : 6.2 cm SL Männchen/unbestimmt; (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.
Lebenszyklus und Paarungsverhalten
Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | Larven
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 Rote Liste Status (Ref. 130435: Version 2025-2 (Global))
Bedrohung für Menschen
Harmless
Nutzung durch Menschen
Tools
Zusatzinformationen
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Internet Quellen
Schätzungen auf der Grundlage von Modellen
Phylogenetischer Diversitätsindex (Ref.
82804): PD
50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Trophische Ebene (Ref.
69278): 3.3 ±0.42 se; based on food items.
Anfälligkeit der Fischerei (Ref.
59153): Low vulnerability (10 of 100).
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