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Gymnotiformes (Knifefishes) >
Hypopomidae (Bluntnose knifefishes)
Etymology: Microsternarchus: Greek, mikros = small + Greek, sternon = breast + Greek, archos = anus (Ref. 45335); javieri: Name 'javieri' in honor of the late Javier Maldonado Ocampo and his contributions to our
understanding of the Neotropical ichthyofauna. Noun in apposition.
Meio ambiente: milieu / Zona climática / intervalo de profundidade / faixa de distribuição
Ecologia
; Água doce pelágico(a,os,as). Tropical
South America: Brazil.
Tamanho / Peso / Idade
Maturidade: Lm ?  range ? - ? cm
Max length : 10.1 cm TL macho/indeterminado; (Ref. 133102)
Descrição suscinta
Chaves de identificação | Morfologia | Morfometria
This species is distinguished from its congeners by the following set of characters: smaller maximum body depth; eye diameter 10-15%, caudal filament 26-44%, caudal vertebrae 60-65 (N = 11); anal fin rays 146-174; total length 74.5-111.7 mm; displaced haemal spines 2-3; ventral margin of the maxilla convex shape in adults and less convex to straight in juveniles (Ref. 133102).
Cross section: oval.
This species is found in streams with well-oxygenated water and slow currents. At rest, they dwell in shallow areas of 0.3 to 1.5 m depth in the dry season, futher characterized by the presence of dead leaves, leaf litter, vegetation cover, and tangled roots (Ref. 133102).
Ciclo de vida ou comportamento de acasalamento
Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas
Escamilla Pinilla, C., C. Cox Fernandes and J.A. Alves-Gomes, 2025. Microsternarchus javieri, a new species of weakly electric fish (Gymnotiformes: Hypopomidae, Microsternarchini) from the Negro River basin, Amazonas, Brazil. Acta Amazonica 55:e55bc24175. (Ref. 133102)
Status na Lista Vermelha da UICN (Ref. 130435: Version 2025-2 (Global))
Ameaça para os humanos
Harmless
Uso pelos humanos
Pescarias: sem interesse
Ferramentas
Relatórios especiais
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Fontes da internet
Estimativas baseadas em modelos
Índice de diversidade filogenética (Ref. 82804) |
PD50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00102 (0.00046 - 0.00225), b=3.06 (2.88 - 3.24), in cm total length, based on all LWR estimates for this body shape (Ref. 93245). |
Nível Trófico (Ref. 69278) |
3.1 ±0.4 se; based on size and trophs of closest relatives |
Vulnerabilidade da pesca (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |