Classification / Names
Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Teleostei (teleosts) >
Gymnotiformes (Knifefishes) >
Gymnotidae (Naked-back knifefishes) > Gymnotinae
Etymology: Gymnotus: Greek, gymnos = naked (Ref. 45335); omarorum: Named for Omar Macadar and Omar Trujillo-Cenoz, pioneers in the anatomical and physiological study of electrogenesis in Gymnotus.
Eponymy: The two people after whom this species is named are Omar Macadar and Omar Trujillo-Cenoz, both of whom are Uruguayan scientists and pioneers in the study of the anatomy and physiology of electrogenesis in knifefishes and who have worked closely [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; pelagic. Tropical
South America: Uruguay.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 28.6 cm TL male/unsexed; (Ref. 118108)
Facultative air-breathing in the genus (Ref. 126274); Found in submerged stems and roots of aquatic vegetation in lakes and small streams. Its
type locality has the following water parameters: electrical conductivity 170-190 µS/cm, pH 7.6-7.8, temperature 23-28°C. Possibly with paternal brood care (Ref. 82430)..
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Richer-de-Forges, M.M., W.G.R. Crampton and J.S. Albert, 2009. A new species of Gymnotus (Gymnotiformes, Gymnotidae) from Uruguay: description of a model species in neurophysiological research. Copeia 2009(3):538-544. (Ref. 82430)
IUCN Red List Status (Ref. 130435: Version 2025-2)
Threat to humans
Harmless
Human uses
Fisheries: of no interest
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