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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 Noms communs | Synonymes | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinoptérygiens (poissons à nageoires rayonnées) > 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).

Environnement / Climat / Gamme Écologie

; eau douce pélagique; pH range: 4.0 - 5.0; profondeur 0 - 2 m (Ref. 104297).   Tropical; 25°C - 26°C (Ref. 104297), preferred ?

Distribution Pays | Zones FAO | Écosystèmes | Occurrences | Point map | Introductions | Faunafri

South America: Brazil.

Taille / Poids / Âge

Maturity: Lm ?  range ? - ? cm
Max length : 5.3 cm TL mâle / non sexé; (Ref. 104297); 5.3 cm TL (female)

Description synthétique Morphologie | Morphométrie

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).

Biologie     Glossaire (ex. 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 Maturité | Reproduction | Frai | Œufs | Fécondité | Larves

Référence principale Upload your references | Références | Coordinateur : Albert, James S. | Collaborateurs

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)

Statut dans la liste rouge de l'IUCN (Ref. 115185)

  Non évalué 

CITES (Ref. 94142)

Not Evaluated

Menace pour l'homme

  Harmless




Utilisations par l'homme

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