Overview

Distribution

Upper Araguaia River basin, Brazil.
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South America: Brazil.
  • Lima, F.C.T. and C.R. Moreira 2003 Three new species of Hyphessobrycon (Characiformes: Characidae) from the upper rio Araguaia basin in Brazil. Neotrop. Ichthyol. 1(1):21-33. (Ref. 52338)
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Physical Description

Morphology

Vertebrae: 32 - 34
  • Lima, F.C.T. and C.R. Moreira 2003 Three new species of Hyphessobrycon (Characiformes: Characidae) from the upper rio Araguaia basin in Brazil. Neotrop. Ichthyol. 1(1):21-33. (Ref. 52338)
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Size

Max. size

2.5 cm (male/unsexed; (Ref. 52338))
  • Lima, F.C.T. and C.R. Moreira 2003 Three new species of Hyphessobrycon (Characiformes: Characidae) from the upper rio Araguaia basin in Brazil. Neotrop. Ichthyol. 1(1):21-33. (Ref. 52338)
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Diagnostic Description

Diagnosis: Hyphessobrycon eilyos is distinguished from its congeners by the absence of humeral and caudal spots; by the presence of numerous dark chromatophores on the lateral surface of the body, with the chromatophores intensely concentrated on the ventral region from the pelvic-fin origin to the end of the caudal-fin base; dorsal, adipose, and caudal fins with carmine red pigmentation in life; the presence of 7-11 maxillary teeth; 6 or 7 horizontal scale rows between the dorsal fin origin and the lateral line; and 15 to 19 branched anal-fin rays. Detailed comparisons between H. eilyos and congeners sharing a general dark color pattern are presented in the "Discussion" (Ref. 52338).
  • Lima, F.C.T. and C.R. Moreira 2003 Three new species of Hyphessobrycon (Characiformes: Characidae) from the upper rio Araguaia basin in Brazil. Neotrop. Ichthyol. 1(1):21-33. (Ref. 52338)
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Ecology

Habitat

Environment

pelagic; freshwater
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Trophic Strategy

Collected in backwaters of the stream that were characteristically tea-colored, contrasting with the clear water of the mainstream, and were choked with vegetable debris from the adjacent riparian forest. The species is associated with abundant aquatic vegetation present in that stream.
  • Lima, F.C.T. and C.R. Moreira 2003 Three new species of Hyphessobrycon (Characiformes: Characidae) from the upper rio Araguaia basin in Brazil. Neotrop. Ichthyol. 1(1):21-33. (Ref. 52338)
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Conservation

Threats

Not Evaluated
  • IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
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