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Siluriformes (Catfishes) >
Heptapteridae (Three-barbeled catfishes)
Etymology: Brachyrhamdia: Greek, brachys, -eia = shor + Brazilian vernacular name, Nhamdia/Jamdia (Ref. 45335); thayeria: Name refers to Thayeria Eigenmann (1908), a genus of South American characin that has a similar diagonal dark stripe on the caudal peduncle. Also named for Nathaniel Thayer Jr., a North American businessman and philanthropist (Ref. 094149).
Eponymy: Nathaniel Thayer Jr (1808–1883) was an American philanthropist and financier. [...] (Ref. 128868), visit book page.
Entorno: milieu / zona climática / rango de profundidad / gama de distribución
Ecología
; agua dulce demersal. Tropical
South America: Brazil.
Tamaño / Peso / Edad
Madurez: Lm ?  range ? - ? cm
Max length : 5.4 cm SL macho / no sexado; (Ref. 94149)
Descripción breve
Claves de identificación | Morfología | Morfometría
This species can be distinguised from all its congeners by a dark brown stripe at caudal region extending transversely from region immediately below middle of adipose-fin base to the base of the ventral caudal-fin lobe. Differs from B. rambarrani by the having the supraoccipital process nearly triangular (vs. roughly rectangular). Also differs from B. heteropleura, B. marthae, and B. meesi by the following set of characters: 35-36 vetebrae (vs. 37-39), and absence of dark lateral band along the trunk (vs. distinct stripe in B. marthae and B. meesi, and faint stripe in B. heteropleura) (Ref. 94149).
Cross section: oval.
Prefers small streams not prone to flooding and is associated with marginal vegetation or along sandy beaches in shallow streams (ca. 1 m depth), with sandy or silt bottom substrate (Ref. 94149).
Ciclo vital y comportamiento de apareamiento
Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva
Slobodian, V. and F.A. Bockmann, 2013. A new Brachyrhamdia (Siluriformes: Heptapteridae) from Rio Japurá basin, Brazil, with comments on its phylogenetic affinities, biogeography and mimicry in the genus. Zootaxa 3717(1):001-022. (Ref. 94149)
Situación en la Lista Roja de la UICN (Ref. 130435: Version 2025-2 (Global))
Amenaza para el ser humano
Harmless
Usos humanos
Herramientas
Informes especiales
Descargar XML
Fuentes de Internet
Estimaciones basadas en modelos
Índice de diversidad filogenética (Referencia
82804): PD
50 = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00813 (0.00379 - 0.01743), b=2.97 (2.79 - 3.15), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Nivel trófico (Referencia
69278): 3.3 ±0.4 se; based on size and trophs of closest relatives
Resiliencia (Referencia
120179): Alto, población duplicada en un tiempo mínimo inferior a 15 meses (Preliminary K or Fecundity.).
Vulnerabilidad pesquera (Ref.
59153): Low vulnerability (10 of 100).
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