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Gymnotiformes (Knifefishes) >
Hypopomidae (Bluntnose knifefishes)
Etymology: Brachyhypopomus: Greek, brachys, eia = short + Greek, hypo = under + Greek, poma, -atos = cover (Ref. 45335); cunia: Named for the its type locality, lago Cuniã, a floodplain lake of the lower rio Madeira inside the Reserva Extrativista do lago do Cuniã. A noun in apposition.
Environment: milieu / climate zone / depth range / distribution range
Ecología
; agua dulce bentopelágico; pH range: 7.1 - ?. Tropical; 28°C - ? (Ref. 116763)
Distribución
Países | Áreas FAO | Ecosistemas | Ocurrencias, apariciones | Point map | Introducciones | Faunafri
South America: Rio Madeira, Brazil.
Tamaño / Peso / Age
Maturity: Lm ? range ? - ? cm
Max length : 17.6 cm TL macho / no sexado; (Ref. 116763); 14.1 cm TL (female)
Short description
Claves de identificación | Morfología | Morfometría
Radios blandos anales: 177 - 224. Brachyhypopomus cunia is distinguished from other species of the genus Brachyhypopomus by the following combination of characters: 16-17 precaudal vertebrae (vs. 18-26 in B. alberti, B. arrayae, B. beebei, B. belindae, B. brevirostris, B. draco, B. flavipomus, B. gauderio, B. hamiltoni, B. janeiroensis, B. jureiae, B. palenque, B. pinnicaudatus, and B. verdii; head depth at eye 47.8-60.0% HL (vs. 36.3-47.7% in B. batesi, B. bombilla, B. provenzanoi, B. regani, and B. sullivani); presence of scales in middorsal region of anterior third of body (vs. absence in B. benjamini; pectoral fin with 10-13 rays (vs. 14-20 in B. bennetti, B. diazi, B. menezesi, and B. occidentalis); mouth width 24.8- 38.0% HL (vs. 15.7-22.6% in B. hendersoni). It has overlapping meristic counts and morphological measurements with B. bullocki and B. walteri, but can be diagnosed by having a very distinctive pigmentation pattern consisting of ventral portions of the flank, over the anal-fin pterygiophores, darkly pigmented, forming a dark stripe along the base of the anal fin (also shared with B. hendersoni), and numerous discrete dark spots (each has a cluster of dark chromatophores) which are scattered over the anal-fin pterygiophores, and in some specimens form an irregular dotted line along the lateral line (vs. absence of dark stripe along the anal-fin base and absence of discrete dark spots over the ventral flank in B. bullocki and B. walteri) (Ref. 116763).
Facultative air-breathing in the genus (Ref. 126274); Occurs in floodplain habitats with low conductivity. Occurs sympatrically above the major series of rapids and falls in the lower Madeira with Brachyhypopomus alberti, B. arrayae, B. bombilla, B. brevirostris, B. pinnicaudatus, B. sullivani, and B. walteri; and sympatrically and syntopically below the lower Madeira rapids with B. brevirostris, B. pinnicaudatus, and B. walteri (Ref. 116763). Feeds on aquatic insect larvae and other small aquatic invertebrates (Ref. 116763).
Life cycle and mating behavior
Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva
Crampton, W.G.R., C.D. de Santana, J.C. Waddell and N.R. Lovejoy, 2017. A taxonomic revision of the Neotropical electric fish genus Brachyhypopomus (Ostariophysi: Gymnotiformes: Hypopomidae), with descriptions of 15 new species. Neotrop. ichthyol. 14(4):e150146. (Ref. 116763)
IUCN Red List Status (Ref. 130435: Version 2024-2)
Threat to humans
Harmless
Human uses
Herramientas
Special reports
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Fuentes de Internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00372 (0.00139 - 0.00994), b=3.06 (2.83 - 3.29), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Nivel trófico (Ref.
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
