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Microsternarchus brevis  Cox Fernandes, Nogueira, Williston & Alves-Gomes, 2015

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Microsternarchus brevis
Male picture by Cox Fernandes, C.

Classification / Names Nombres comunes | Sinónimos | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterígios (peces con aletas radiadas) > Gymnotiformes (Knifefishes) > Hypopomidae (Bluntnose knifefishes)
Etymology: Microsternarchus: Greek, mikros = small + Greek, sternon = breast + Greek, archos = anus (Ref. 45335);  brevis: Named for its overall size and caudal filament (Latin 'brevis' for short).

Medioambiente / Clima / Gama Ecología

; agua dulce pelágico; pH range: 4.0 - 5.0; rango de profundidad 0 - 2 m (Ref. 104297).   Tropical; 25°C - 26°C (Ref. 104297), preferred ?

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South America: Brazil.

Tamaño / Peso / Age

Maturity: Lm ?  range ? - ? cm
Max length : 5.3 cm TL macho / no sexado; (Ref. 104297); 5.3 cm TL (female)

Short description Morfología | Morfometría

This species is distinguished by the following characters: short caudal filament 12.8-20.9% of TL; size of body small 3.75-5.32 cm SL; slightly inferior mouth 1.34-2.42 cm HL; pigmentation on body uniformly distributed along the entire area, including head; it also lacks a well delineated dark area on the pseudotympanum, where the anterior end of the posterior lateral line nerve branches with the dorsal ramus of the posterior lateral line nerve (Ref. 104297).

Biología     Glosario (por ej. epibenthic)

This species is collected in shallow areas from 0.5-1.5 m in the dry season or at the beginning of the rainy season. It also occurs in black-water streams along the middle part of the rio Negro Basin (Amazon). Along stream margins, it occurs in well oxygnated waler and prefers weak current with abundant submerged vegetation, roots and leaf litter. In areas with stronger current, this species tends to inhabit submerged trees and tangled roots of epiphytic plants. Variation of physico-chemical water parameters taken in 2002-2007: conductivity 9.0-22.2 µS/cm, temperature 25-26°C, ph 4.01-5.0 and dissolved oxygen 4.12-7.10 mg/L. Stomach contents of one specimen contains parts of zooplankton. Associated genera of gymnotiforms species collected in the area were Brachypopomus and Hypopgus (Ref. 104297).

Life cycle and mating behavior Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva

Main reference Upload your references | Referencias | Coordinador : Albert, James S. | Colaboradores

Cox Fernandes, C., A. Nogueira, A. Williston and J.A. Alves-Gomes, 2015. A new species of electric knifefish from the rio Negro, Amazon basin (Gymnotiformes: Hypopomidae, Microsternarchini). Proc. Acad. Nat. Sci. Phil. 164(1):213-227. (Ref. 104297)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




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