Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) >
Gymnotiformes (Knifefishes) >
Gymnotidae (Naked-back knifefishes)
Etymology: Gymnotus: Greek, gymnos = naked (Ref. 45335); pantanal: The specific epithet pantanal from the Pantanal Matogrossense of Brazil, the hydrological region of the type locality. A noun in apposition.
Environment / Climate / Range
Ecology
Freshwater; demersal. Tropical, preferred ?
South America: Brazil, Paraguay and Bolivia.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 25.1 cm SL male/unsexed; (Ref. 54472)
Short description
Morphology | Morphometrics
Gymnotus pantanal differs from other members of the G. pantherinus species-
group (except G. anguillaris) in possessing a color pattern composed of thin obliquely oriented pale pigment bands (about one third the width of the dark bands) with wavy margins restricted to the ventral portion of the body (rarely extending above the lateral line) on
the anterior half of the body. Gymnotus pantanal further differs from other members of the G. pantherinus species-group in possessing a wider head (72–77 vs. 52–69% head length). Gymnotus pantanal further differs from G. anguillaris in possessing more narrowly set eyes (37–41 vs. 43–56% head length), a deeper head (66–74 vs. 60–65% head length), larger branchial openings (38–43 vs. 29–36% head length), longer pectoral fins (51–56 vs.
42–50% head length), more pectoral-fin rays (mode 17 vs. 16), and fewer pored posterior
lateral-line scales (to first ventral ramus: 47–58 vs. 58–62; total: 102–114 vs. 124–130).
Found in rooted grasses and floating macrophytes in small creeks and along the banks of larger backwater rivers (Ref. 54472). Occurs syntopically with Gymnotus inaequilabiatus and G. sylvius (Ref. 54472).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Fernandes, F.M.C., J.S. Albert, M.F.Z. Daniel-Silva, C.E. Lopes, W.G.R. Crampton and L.F. Almeida-Toledo, 2005. A new Gymnotus (Teleostei: Gymnotiformes: Gymnotidae) from the Pantanal Matogrossense of Brazil and adjacent drainages: continued documention of a cryptic fauna. Zootaxa 933:1-14. (Ref. 54472)
IUCN Red List Status (Ref. 115185)
CITES (Ref. 94142)
Not Evaluated
Threat to humans
Harmless
Human uses
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