Classificazione / Nomi
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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.
Ambiente: milieu / zona climatica / distribuzione batimetrica / gamma di distribuzione
Ecologia
; acqua dolce benthopelagico; pH range: 7.1 - ?. Tropical; 28°C - ? (Ref. 116763)
South America: Rio Madeira, Brazil.
Dimensione / Peso / Età
Maturità: Lm ?  range ? - ? cm
Max length : 17.6 cm TL maschio/sesso non determinato; (Ref. 116763); 14.1 cm TL (female)
Breve descrizione
Chiavi di identificazione | Morfologia | Morfometria
Raggi anali molli: 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).
Body shape (shape guide): elongated.
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).
Ciclo vitale e comportamento di accoppiamento
Maturità | Riproduzione | Deposizione | Uova | Fecondità | Larve
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)
Stato della Lista Rossa IUCN (Ref. 130435: Version 2025-2 (Global))
Minaccia per l'uomo
Harmless
Usi umani
Strumenti
Rapporti speciali
Scarica XML
Fonti Internet
Stime basate su modelli
Indice di diversità filogenetica (Fonte Biblio. 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00372 (0.00143 - 0.00967), b=3.06 (2.83 - 3.29), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Livello trofico (Fonte Biblio. 69278) |
3.1 ±0.4 se; based on size and trophs of closest relatives |
Vulnerabilità della pesca (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |